This document is an educator's guide about diamondback terrapins in Tampa Bay that provides background information on their ecology. It covers topics like their size, geographic distribution in Florida which represents 20% of their range, habitat in estuaries and mangroves, longevity up to 22 years, reproduction including nesting and temperature-dependent sex determination, hatchling characteristics, diet as molluscivores, predators, and importance in the food chain as both predators and prey. The guide encourages education on terrapins and includes lessons, worksheets, a board game, and evaluation to improve conservation of this ecologically significant species.
The document summarizes information about diamondback terrapins in Florida and the conservation efforts of the Florida Turtle Conservation Trust. It discusses how the FTCT has organized educational events and materials, supported research, and worked to conserve turtle habitats in Florida. It also outlines threats like habitat loss and drowning in crab pots that terrapins face and actions being taken to address these threats, including using bycatch reduction devices in crab pots.
This document provides information about darters, including their anatomy, taxonomy, distribution, importance, physiology, breeding, habitat, and conservation. It notes that darters are small freshwater fish found primarily in North America, with about 250 species. They lack scales on their belly and a swim bladder, making them well-adapted to fast-flowing stream habitats but more difficult to catch. Darters are important indicators of stream health and face threats from pollution, siltation, and habitat degradation. The document highlights several darter species found in different regions.
This document discusses remote sensing methods to classify terrestrial habitats in the Congo Basin Coast region of Gabon, Africa. It used Landsat 8 imagery to classify critical habitats like mangroves, water, forests, wetlands and savannah. Maximum likelihood classification of Landsat 8 bands 1-7 performed best for most habitats, while classification tree analysis of bands 4, 5, and 6 was best for mangroves. The work aims to increase understanding of land cover distributions to inform conservation efforts in the region.
Vaquita Presentation - Dr. Lorenzo Rojas BrachoCheryl Butner
The document summarizes the history of research on the vaquita porpoise and conservation efforts to protect the species. It describes key researchers who first discovered and studied the vaquita, including Ken Norris who described it as a new species in 1958. Subsequent studies by Brownell et al. in the 1980s provided the first photos and descriptions of the vaquita's appearance. Population surveys estimated only 567 individuals in 1997, with bycatch in gillnets identified as the primary threat. CIRVA was formed to create a recovery plan, recommending the creation of a vaquita refuge where gillnet fishing was banned in stages from 2005-2002.
The document analyzes the impacts of energy development on wildlife populations in southeast Montana and northeast Wyoming. It finds that habitat loss from energy projects like coal mining, oil and gas development, and wind farms is negatively affecting species like mule deer, pronghorn, and sage-grouse by reducing their populations and health. This is threatening the hunting tradition in the region as well as the tourism industry. The key impacts are direct habitat loss from energy infrastructure and indirect loss from animals avoiding areas near development. If energy expansion continues without proper protections, it could drastically alter wildlife habitats in the two states.
In this research paper from the Spring 2015 semester, I described my analysis of certain genome scaffolds, or gaps within the Malaclemys terrapin genome. I examined seven of these scaffolds and determined their approximate sizes through Polymerase Chain Reaction (PCR) and Gel Electrophoresis. The DNA was then prepped to be sent for sequencing by an external source. The resulting chromatograms gave inconclusive results on the exact sequences of these scaffolds.
The document summarizes information about diamondback terrapins in Florida and the conservation efforts of the Florida Turtle Conservation Trust. It discusses how the FTCT has organized educational events and materials, supported research, and worked to conserve turtle habitats in Florida. It also outlines threats like habitat loss and drowning in crab pots that terrapins face and actions being taken to address these threats, including using bycatch reduction devices in crab pots.
This document provides information about darters, including their anatomy, taxonomy, distribution, importance, physiology, breeding, habitat, and conservation. It notes that darters are small freshwater fish found primarily in North America, with about 250 species. They lack scales on their belly and a swim bladder, making them well-adapted to fast-flowing stream habitats but more difficult to catch. Darters are important indicators of stream health and face threats from pollution, siltation, and habitat degradation. The document highlights several darter species found in different regions.
This document discusses remote sensing methods to classify terrestrial habitats in the Congo Basin Coast region of Gabon, Africa. It used Landsat 8 imagery to classify critical habitats like mangroves, water, forests, wetlands and savannah. Maximum likelihood classification of Landsat 8 bands 1-7 performed best for most habitats, while classification tree analysis of bands 4, 5, and 6 was best for mangroves. The work aims to increase understanding of land cover distributions to inform conservation efforts in the region.
Vaquita Presentation - Dr. Lorenzo Rojas BrachoCheryl Butner
The document summarizes the history of research on the vaquita porpoise and conservation efforts to protect the species. It describes key researchers who first discovered and studied the vaquita, including Ken Norris who described it as a new species in 1958. Subsequent studies by Brownell et al. in the 1980s provided the first photos and descriptions of the vaquita's appearance. Population surveys estimated only 567 individuals in 1997, with bycatch in gillnets identified as the primary threat. CIRVA was formed to create a recovery plan, recommending the creation of a vaquita refuge where gillnet fishing was banned in stages from 2005-2002.
The document analyzes the impacts of energy development on wildlife populations in southeast Montana and northeast Wyoming. It finds that habitat loss from energy projects like coal mining, oil and gas development, and wind farms is negatively affecting species like mule deer, pronghorn, and sage-grouse by reducing their populations and health. This is threatening the hunting tradition in the region as well as the tourism industry. The key impacts are direct habitat loss from energy infrastructure and indirect loss from animals avoiding areas near development. If energy expansion continues without proper protections, it could drastically alter wildlife habitats in the two states.
In this research paper from the Spring 2015 semester, I described my analysis of certain genome scaffolds, or gaps within the Malaclemys terrapin genome. I examined seven of these scaffolds and determined their approximate sizes through Polymerase Chain Reaction (PCR) and Gel Electrophoresis. The DNA was then prepped to be sent for sequencing by an external source. The resulting chromatograms gave inconclusive results on the exact sequences of these scaffolds.
Sea turtles face many threats including habitat destruction, entanglement in fishing gear, pollution, and the 2010 Gulf oil spill. The spill particularly harmed Kemp's ridley turtles, weakening eggs and poisoning hatchlings and adults. Conservation groups like NASA and WWF helped by moving turtle nests from oiled beaches and raising awareness. The full impact may not be known for years as turtles take decades to mature. Donations to WWF support protecting critical habitats and reducing threats like bycatch.
The document outlines 12 things that were learned at the Marine Discovery Center, including:
1) The three components of an ecosystem: marine, coastal uplands, and estuarine
2) Four types of mangroves and their characteristics
3) Five species of Florida sea turtles
4) Types of birds, fish, mammals, and other wildlife found in the area's ecosystems
The Marine Discovery Center teaches about local education and conservation through its presentations and exhibits.
This document discusses the invasive algae Didymosphenia geminata, also known as rock snot. It forms thick mats that negatively impact streams by decreasing clarity, oxygen, and suitable habitat for other organisms. It currently exists in 22 US states, including nearby Arkansas. The algae thrives in conditions with high nitrogen, low phosphorus, sunlight, and stable water flow. Efforts to control it include developing predictive models, adding phosphorus, using copper compounds, cleaning equipment, and increasing public awareness through educational materials.
The Riverhead Foundation is a marine conservation organization that performs necropsies on sea turtles and marine mammals to further their understanding of threats to these species and educate the public. The document describes the objectives and findings of an internship where the author observed necropsies on 36 sea turtles and recorded data on cause of death and biological characteristics. Major threats identified were boat strikes and plastic ingestion. The necropsy data collected will help the Foundation in their conservation efforts of at-risk sea turtle species in the New York area.
Extinct species of animals from India were discussed. Key extinct species included the Zanzibar leopard, Baiji river dolphin, and Indian cheetah. The main causes of extinction were loss of habitat due to human activities like agriculture, overhunting, and pollution. Conservation efforts in India and internationally include establishing marine protected areas and legislation to protect threatened wildlife. However, human factors continue to threaten biodiversity if not addressed.
This document provides background information to supplement a film called "Life of the Bays" about the habitats and ecosystems of Florida Bay, Biscayne Bay, and the Florida Keys. It describes the key habitats of coral reefs, sea grass communities, and mangrove forests. It explains how coral reefs are formed by coral polyps secreting calcium carbonate over many years. Sea grasses provide a nursery for fish and food for marine life. Mangroves stabilize the shoreline and create estuaries. These habitats are interdependent and sustain life in the bays.
Taxonomic status and biology of sea turtle[college of fisheries, Kishanganj]....AryanRoy28
Expected learning outcome: taxonomic status, feeding habits, distribution and description of sea turtles ; legal protection provided to sea turtle under international law ; Conservation goals and measure to protect sea turtles
Dive into Ghana's crucial mission of safeguarding sea turtles with this enlightening PowerPoint presentation. Explore the intricate web of challenges these magnificent creatures face and discover their pivotal role in maintaining marine ecosystems. From the impact of climate change to the threats posed by human activities, each slide unveils a facet of the journey toward conservation. Gain insights into ongoing initiatives, community involvement, and innovative approaches to ensure a harmonious coexistence between humans and sea turtles. Together, let's embark on a visual journey to understand the importance of protecting these ancient mariners and fostering a sustainable future for Ghana's coastal biodiversity.
This document provides a summary of the diversity and status of reptilian fauna in Bangladesh. It begins by outlining the classification and order of reptiles present in the country. It then examines each order - Lacertilia, Testudines, Serpentes, and Crocodylia - in more detail, breaking them down into their families and providing information on species, status, distribution and other characteristics. For each family, it lists the species found in Bangladesh and their local and global conservation status. In total, it finds that Bangladesh is home to over 200 reptile species. The document contributes to understanding the biodiversity of reptiles in Bangladesh and informing conservation efforts.
This document discusses corals and coral reefs. It begins by explaining that corals are tiny sea animals that often form colonies attached to rocks or reefs. Over time, as corals die their skeletons remain and new corals grow on top, building large coral reef structures. As reefs grow closer to shore they form fringing reefs, which can become barrier reefs that are further from shore. Coral reefs are important habitats for many sea creatures and are also areas for fishing and recreation. However, coral reefs are being destroyed by practices like dynamite fishing and pollution. Ways to protect coral reefs include banning destructive fishing techniques and controlling pollution.
Save the Frogs Day, Professor Hero, Griffith University 2012JMHero
Global amphibian populations are facing a crisis, with over 32% of species threatened with extinction and 122 species having disappeared since the 1980s. In Australia specifically, at least 5 species have gone extinct since 1979 and many more are experiencing declines. Possible causes of these declines include invasive species, overharvesting, habitat loss, contaminants, emerging infectious diseases like chytridiomycosis, and the effects of global climate change. Researchers at Griffith University are working to understand the causes of declines and conduct conservation efforts like habitat restoration and establishing captive breeding programs to save critically endangered species like members of the Taudactylus genus of frogs. Public involvement through activities like protecting local wetlands and reducing chemical use can help address
This document discusses various types of plankton and their roles in marine ecosystems. It describes phytoplankton like diatoms and dinoflagellates, which are primary producers, as well as zooplankton like copepods that feed on phytoplankton. It also discusses how some marine species like sea turtles, shrimp, and crabs spend part of their life as plankton. Overfishing and bycatch are negatively impacting fish stocks and endangered species like sea turtles, sharks, and tuna.
Green sea turtles are large sea turtles found in tropical and subtropical oceans around the world. They have a dorsoventrally flattened body and paddle-like flippers adapted for swimming. Adults typically inhabit shallow lagoons and feed on sea grasses. Throughout their life, green sea turtles inhabit different habitats - they lay eggs on beaches, spend their early years in open ocean waters, and mature in coastal areas with sea grass beds. Major threats include hunting, accidental capture in fishing gear, pollution, habitat destruction, and infectious diseases. Conservation efforts include protecting nesting beaches and reducing accidental turtle captures.
Spotted ratfish belongs to order chimera, class condricthyes. It is a marine water fish. Whole body is pigmented with white spots. and has long rat like tail. male anf females have distinct apperance. Males have claspers for transfer of sperms to the female body.
Sea turtles are reptiles that live in the ocean.
Sea turtles (superfamily Chelonioidea), sometimes called marine turtles, are reptiles of the order Testudines and of the suborder Cryptodira.
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protecting endangered plant and animal speciesJhonnyLajom
The Philippines has extremely high biological diversity and is home to thousands of endemic plant and animal species. However, many species are now endangered or critically endangered due to threats like habitat loss, pollution, and climate change. Some species that are struggling to survive include the Philippine Eagle, Tamaraw, and Philippine Crocodile. International agreements and Philippine laws have been put in place to protect endangered species and their habitats, but more work is still needed, such as enforcing anti-poaching regulations, expanding protected areas, and engaging in species conservation and recovery programs.
A presentation about frog conservation. It was a presentation by me for raising awareness at my community.
--- Dr. Monzur Kader Chowdhury, DVM
Email: monzur.sau@gmail.com
The document discusses coral reef biodiversity and the Great Barrier Reef. It describes the Great Barrier Reef as a collection of over 3000 coral reefs off Australia's coast, forming one of the natural wonders of the world. It is home to thousands of species and provides food and jobs to the local economy. However, the reef is threatened by pollution, coastal development, ship traffic, and climate change, which have already damaged and killed parts of the reef. The reef ecosystem is highly complex, with coral polyps, fish, sharks, rays, and other species interacting as producers, grazers, predators, and through symbiotic relationships.
The document discusses coral reef biodiversity and the Great Barrier Reef. It describes the Great Barrier Reef as a collection of over 3000 coral reefs off Australia's coast, forming one of the natural wonders of the world. It is home to thousands of species and provides food and jobs to the local economy. However, the reef is threatened by pollution, coastal development, ship traffic, and climate change, which have already damaged and killed parts of the reef. The reef ecosystem is highly complex, with coral polyps, fish, sharks, rays, and other species interacting as producers, grazers, predators, and through symbiotic relationships.
This document discusses 7 species of sea turtles and the threats they face from human activity. It provides details on the appearance and characteristics of each species. The main threats are over-harvesting of eggs and meat, hunting for luxury items, and accidental killing from fishing nets and plastic debris. Conservation efforts include using Turtle Excluder Devices in shrimp nets, establishing protected nesting areas, promoting sustainable tourism, and advocacy work by organizations like the World Wildlife Foundation and Sea Turtle Conservancy.
Based on the concept of the d"Genius Hour" where students can plan a project based on their passion, this environmental project urges students to take Action. Based on ScreenShots of my https://www.smore.com/p1yuq-share-our-planet-5th-gr-showcase
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1. Diamondback Terrapins of
Tampa Bay: an Educator’s Guide
Developed by George L. Heinrich, Timothy J. Walsh
and Dr. Joseph A. Butler
Illustrations by Charles H. Miller
2. Project Partners
Acknowledgements
We thank Charles H. Miller, Elizabeth A. Wallace and Jessica A. Waltman for assistance
with conceptual development of the diamondback terrapin board game. Christopher S.
Boykin kindly shared unpublished data from his Tarpon Key study site. Misty Cladas,
Robin Peacock, Elizabeth A. Wallace, and Jessica A. Waltman provided thoughtful review
of various sections of the educator’s guide. We are grateful to the Tampa Bay Estuary
Program for awarding a Bay Mini-Grant which funded this project.
Published by the Florida Turtle Conservation Trust (December 2010).
3. Note to Educators
Florida is geographically located in the second richest center of global diversity for
turtles and its wide variety of habitats support over 8% of the world’s known species.
Twenty-five (45.5%) of the 55 species found in the United States also occur in Florida,
with 18 (72%) of those considered by turtle biologists to be in need of conservation
attention. Florida’s significant habitat diversity and species richness not only make the
state a chelonian hotspot, but critical to the conservation of many species as well.
Turtles are ancient creatures that walked the earth with the dinosaurs and today are
important and visible elements in many ecosystems. Some species serve as barometers of
the environment (providing information on the health of their habitat), while others serve
as keystone, umbrella or flagship species. Conservation efforts on their behalf are also
beneficial to the ecosystems in which they are found. Certainly, the threats to Florida
turtles and their associated ecosystems present broad conservation challenges.
However, despite the apparent urgency of the situation, the opportunities for
conservation remain great. Consequently, turtles are an excellent group to use for
teaching both ecology and conservation.
The authors of this educator’s guide believe that education is the foundation of
conservation and that educators can play a key role in conserving these ecologically
important vertebrates. This guide was developed for both formal educators (elementary-
secondary) and non-formal educators (e.g., zoos, aquaria, museums, and nature centers)
and uses the diamondback terrapin as a model, integrating lessons in biology, geography,
language arts, and mathematics. It includes background instructional material,
worksheets, an associated board game, and additional teaching resources. We hope that
you find it useful and encourage you to complete and return the evaluation form located
at the end of the guide. Your input will help improve future editions and would be greatly
appreciated.
4. Table of Contents
Introduction 1
Ecology 1
Florida Distribution of Diamondback Terrapins 4
Threats and Conservation Actions 5
Laws and Regulations Pertaining to Diamondback Terrapins in Florida 7
Worksheet #1: Estuarine Food Chains 8
Worksheet #2: Estuarine Food Webs 9
Worksheet #3: Sexual Dimorphism 10
Worksheet #4: Sex Ratio 12
Worksheet #5: Clutch Size 14
Worksheet #6: Hatchling Measurements 16
Diamondback Terrapin Word Find 18
Coloring Page (adult male diamondback terrapin surfacing in water) 19
Coloring Page (adult female diamondback terrapin capturing blue crab) 20
Diamondback Terrapins: Living on the Edge (Game Pieces) 21
Glossary of Terms 22
Ten Things You Can Do to Help Protect Diamondback Terrapins 25
Additional Teaching Resources 26
Wanted (poster) 28
Educator’s Guide Evaluation Form 29
5. Introduction
The diamondback terrapin (Malaclemys terrapin) is the only entirely estuarine turtle and
is a member of the family Emydidae. Despite the importance of Florida to diamondback
terrapin biology, little is known concerning this species over long stretches of Florida
coastline. Graduate students and researchers are strongly encouraged to consider
initiating field studies that will ultimately benefit this imperiled species. Likewise,
diamondback terrapins are unknown to many Floridians. Education is also an important
component of successful wildlife conservation programs. The education of diverse
audiences is required if we are to improve the future outlook for this umbrella species.
Educators are urged to teach about the ecology and plight of this ecologically significant
vertebrate. Without your participation, there is little hope for this flagship species for
coastal conservation.
Ecology
Size: Diamondback terrapins exhibit sexual dimorphism with males being significantly
smaller than females. Male terrapins in Tampa Bay reach a maximum carapace length of
143 mm and weight of 425 grams. Female terrapins reach a maximum carapace length of
215 mm and weight of 1,600 grams.
Geographic distribution: The diamondback terrapin is found from Cape Cod
(Massachusetts) to southern Texas. Although terrapins occur in 16 states along the
Atlantic and Gulf coasts, the coastline of Florida represents approximately 20% of their
entire range. Five of the seven recognized subspecies occur in the state’s extensive salt
marsh and mangrove habitats, including three endemics (see distribution map).
Therefore, Florida terrapin populations and habitats are critical to the conservation of
the entire species.
Diamondback terrapins occur in a number of locations throughout Tampa Bay. Terrapins
can occasionally be observed in protected areas such as Tarpon Key (Pinellas County),
Alafia Bank (Hillsborough County) and Terra Ceia Bay (Manatee County).
Since diamondback terrapins are restricted to brackish water, they have a narrow linear
range. Maps found in field guides lead one to believe that their distribution is contiguous,
when in actuality they should show a series of dots and dashes, and not a solid line. In
other words, large gaps exist where the species is not present.
1
6. In 2008, Parham and co-workers published a paper documenting diamondback terrapins
are native to Bermuda (supported by fossil and genetic data). A tiny population currently
occurs at the Mid Ocean Club golf course. This publication would be of value in initiating
a student discussion about species dispersal.
Habitat: The diamondback terrapin is the only turtle in the world that is entirely
restricted to brackish water and can be found in Florida’s extensive estuaries, mangrove
and salt marsh habitats. Tampa Bay is the largest open water estuary in Florida. These
habitats are often described as areas “where rivers meet the sea” (mixture of fresh and
salt water).
Longevity: Field studies have suggested that diamondback terrapins can live over 20
years. Captive terrapins are known to live up to 22 years.
Reproduction: Diamondback terrapins in Florida nest from late April through the end of
July. They nest on dunes, beaches, sandy edges of marshes, islands, and dike roads.
Terrapins may travel relatively long distances (up to 10.4 km) to nest. They can lay
multiple nests per season and typically are diurnal nesters, although nocturnal nesting has
been documented. Terrapins in the northern part of their range lay as many as 22 eggs,
while a study in northeastern Florida showed an average clutch size of 6.7 eggs. The
oblong pinkish eggs turn white within 24-48 hours. Eggs range from 31.1-39.0 mm in
length and 19.7-23.9 mm in width. Northern subspecies have smaller egg sizes than those
in the southern part of the species range. In northeastern Florida, hatchlings emerged
from 55-97 days after egg deposition. Diamondback terrapins have temperature
dependent sex determination (TDSD) and sex is determined by the temperature of the
nest at a critical point in incubation. Some terrapin hatchlings overwinter in the nest.
Hatchlings: Diamondback terrapin hatchlings in northeastern Florida have a mean
carapace length of 33.9 mm and mean weight of 9.5 grams. Terrapin hatchlings and
juveniles avoid open water and seek refuge in vegetation and/or marshes.
Diet: Diamondback terrapins are molluscivores and the single Florida study on diet found
that they primarily eat dwarf surf clams (Mulinia lateralis), marsh periwinkles (Littorina
irrorata) and small species of crabs. Terrapins have a broad tomium (mouth plate
composed of keratin) that allows them to crush the shell of their prey.
Predation: Diamondback terrapins and their eggs are known to be taken by many
predators including raccoons, foxes, otters, skunks, Norway rats, crows, laughing gulls,
ghost crabs, and fire ants.
2
7. Importance to brackish water ecosystems: Terrapins play a significant role in the food
chain as both predators and prey. As predators, they help to control populations of prey
items (see list of species above). In addition, they are an important food item for many
species (see list of species above).
Butler, Seigel and Mealey (2006) published a thorough species account, including
excellent photographs of different subspecies and size classes. We highly recommend
this paper as a source of additional background information.
3
8. Florida Distribution of Diamondback Terrapins
A: Carolina diamondback terrapin (Malaclemys terrapin centrata)
B: Florida east coast diamondback terrapin (M. t. tequesta)
C: Mangrove diamondback terrapin (M. t. rhizophorarum)
D: Ornate diamondback terrapin (M. t. macrospilota)
E: Mississippi diamondback terrapin (M. t. pileata)
9. Threats and Conservation Actions
Diamondback terrapins were once common in brackish ecosystems along the Atlantic and
Gulf coasts, but have suffered from a long history of human exploitation. Some threats
are specific to particular regions, while others occur nearly rangewide. Current major
threats to this species in Florida include loss of nesting habitat, predation of nests and
adults, and incidental drowning in crab pots. Several other anthropogenic threats are
known to affect terrapins. While each threat alone is of concern, there is an even
greater concern regarding their ability to work in negative synergy. It should be known,
however, that each of these conservation challenges comes along with a conservation
opportunity. It’s what we do with that opportunity that can make a difference.
Loss of nesting habitat: Coastal development decreases available nesting habitat and
further fragments populations. Acquisition and protection of nesting sites by
governmental agencies and private conservation groups would greatly benefit terrapin
conservation efforts.
Coastal armoring: Hardening of shoreline to prevent real estate property damage can
decrease available terrapin nesting habitat. This has also been well-documented as a
threat to marine turtles. In cases where coastal armoring cannot be avoided, then
identifying ways to provide access to terrapin nesting sites is recommended.
Incidental drowning in crab pots: Mortality due to bycatch in crab pots is the greatest
threat to terrapins throughout their range. This threat first appeared in the literature
in 1942. Research in Florida waters has shown that the use of 45 mm x 120 mm bycatch
reductions devices (BRDs) on crab pots can reduce terrapin mortality by 73.2%. Further,
there was no impact on sex, size or number of legal-sized blue crabs captured.
Regulatory change requiring BRDs on commercial and recreational crab pots used in
Florida waters would be the greatest immediate conservation action that could be
implemented by the Florida Fish and Wildlife Conservation Commission.
Ghost pots: Ghost pots continue to trap wildlife long after they are abandoned or lost.
Support of old crab pot removal programs and participation in such efforts will save
wildlife from a certain death.
Harvest: It is believed that collection for the food and pet trade had a negative impact
on Florida terrapin populations in the past. It is now illegal to collect terrapins for
commercial purposes. The removal of even small numbers of turtles from the wild can
cause populations to crash and in some cases not recover. Educational efforts
5
10. highlighting the negative impacts of removing terrapins from the wild is of importance.
Increased law enforcement efforts would also be beneficial.
Predation: Diamondback terrapin nests and adults are an important food source for many
species of wildlife (see list of species above). Some subsidized predators, such as
raccoons, cause considerable damage to terrapin populations at nesting sites. In some
cases, control efforts may be warranted.
Encounters with automobiles (road mortality): Although considered to be a very minor
threat to diamondback terrapins in Florida, it has been documented in a number of
counties. Road mortality is a major threat in other states, such as New Jersey,
Delaware, South Carolina, and Georgia. Terrapins should be taken into consideration in
road planning and realignment projects.
Boat strikes: Encounters with boats have been documented as a significant threat to
diamondback terrapins. Mortality can occur as a result of blunt-force trauma from boat
impact or from injuries caused by propellers. Survivors may experience scars, loss of
limbs, compromised fitness, and decreased survivorship. Efforts that may address this
threat include increasing the number and size of protected areas in known terrapin
habitat (closed to motorized watercraft), establishing reduced speed zones, encouraging
the use of propeller guards, developing effective education programs, and increasing law
enforcement efforts.
Non-native species: These species can have a negative impact on diamondback terrapins.
Feral hogs disturb nesting sites and can eat eggs and young. Fire ants are known to
attack hatching eggs and young. Since terrapins have temperature dependent sex
determination (TDSD), shading of nest sites by invasive non-native plants can result in
more males being produced and potentially skewing sex ratios. All of these threats were
documented in a study of terrapins by Butler and Heinrich in the Big Bend region.
Coordinated efforts to control harmful, invasive non-native species are needed in order
to conserve terrapin populations.
Pollution: Coastal aquatic and terrestrial habitats are littered with trash. Participation in
coastal cleanup programs is an excellent way for people to contribute to protecting
diamondback terrapin habitat.
Oil spills: This threat can degrade critical wetlands and nesting habitat. It can also
affect the food chain. Contaminants can bioaccumulate in terrapin prey items. The
Tampa Bay oil spill (1993) and the Deepwater Horizon blowout (2010) are both known to
6
11. have directly affected terrapins. Avoidance of drilling for oil in the Gulf of Mexico would
be a positive conservation action for this species and the wildlife community in general.
Global warming: The greatest concern regarding this threat is the potential loss of
nesting habitat due to sea level rise. Since terrapins have temperature dependent sex
determination (TDSD), increased nest temperatures can result in more females being
produced and potentially skewing sex ratios. Support governmental policies and
initiatives that can positively address this threat.
Laws and Regulations Pertaining to Diamondback Terrapins in Florida
Take is limited to one diamondback terrapin per person per day (midnight to midnight)
from the wild for noncommercial use. The transport of more than one terrapin per day is
prohibited, unless the transporter has a license for sale or exhibition of wildlife,
aquaculture certification from the Department of Agriculture and Consumer Services, or
documentation that their terrapins were legally obtained. Selling terrapins is prohibited.
Possession of terrapins is limited to two. The take of terrapin eggs is also prohibited.
7
12. Worksheet #1: Estuarine Food Chains
Try your hand at creating your own estuarine food chains. The examples provided below
include a diamondback terrapin. However, you do not need to include terrapins in your
food chains unless you wish to do so.
example #1: Spartina grass marsh periwinkle diamondback terrapin
example #2: diamondback terrapin egg ghost crab raccoon
____________________ ____________________ ____________________
____________________ ____________________ ____________________
____________________ ____________________ ____________________
____________________ ____________________ ____________________
____________________ ____________________ ____________________
____________________ ____________________ ____________________
____________________ ____________________ ____________________
____________________ ____________________ ____________________
____________________ ____________________ ____________________
____________________ ____________________ ____________________
8
13. Worksheet #2: Estuarine Food Webs
A food web is a group of organisms related by predator-prey and consumer-resource
interactions. It is comprised from all interrelated food chains in an ecological community.
Use four of your food chains to draw your own estuarine food web.
example:
9
14. Worksheet #3: Sexual Dimorphism
Diamondback terrapins are a sexually dimorphic species (males are significantly smaller
than females). In order for scientists to compare adult male to female terrapins, they
must measure and weigh a representative sample of each sex. Add the lengths and
weights for the 10 males (data provided) and then determine the range (lowest and
highest numbers) and mean (average). Do the same thing with the data provided for the
females. Present your findings as a range and mean for both sexes (see example below).
The “n” represents the number in the sample size. In science, larger sample sizes (n)
make the data more statistically significant. A portion of this data came from a field
study site located in Tampa Bay.
example:
adult males: maximum carapace length = 120-140 mm, mean = 130.5 mm (n = 50), weight =
300-425 grams, mean = 375 grams (n = 50)
adult females: maximum carapace length = 155-210 mm, mean = 180 mm (n = 70), weight =
1,000-1,600 grams, mean = 1,250 grams (n = 70)
your results:
adult males: maximum carapace length = ____-____ mm, mean = ____mm (n = ____),
weight = ____-____ grams, mean = ____ grams (n = ____)
adult females: maximum carapace length = ____-____ mm, mean = ____mm (n = ____),
weight = ____-____ grams, mean = ____ grams (n = ____)
10
16. Worksheet #4: Sex Ratio
Field biologists often need to determine sex ratios for the species they study. Let’s
consider how you would go about determining the sex ratio of a population of
diamondback terrapins. Male terrapins are significantly smaller than females, have
narrower heads and longer tails. Count the number of each sex and then turn it into a
simple ratio (see examples below). You need to present your sex ratio with one male, so it
will require you to use some basic math (try dividing both numbers by the number of
males).
example #1: 10 males and 20 females would be 10:20 or a 1:2 sex ratio
example #2: 10 males and 25 females would be 10:25 or a 1:2.5 sex ratio
your results:
____ males and ____ females would be ____:____ or a ____:____ sex ratio
12
17.
18. Worksheet #5: Clutch Size
Determining the clutch size (number of eggs) of diamondback terrapins is done by
radiographing a female and then counting the number of eggs, or by counting the eggs
found in a nest. Add all of the clutch sizes presented below and divide by the number of
clutches sampled. Present your findings as a range and mean (see example below). The
“n” represents the number in the sample size. In science, larger sample sizes (n) make
the data more statistically significant. This data came from a field study in northeastern
Florida.
example: clutch size = 5-10 eggs, mean = 7.5 eggs (n = 10)
your results: clutch size = ____-____ eggs, mean = ____ eggs (n = ____)
Clutch # # eggs
1 4
2 8
3 5
4 6
5 7
6 10
7 6
8 9
9 7
10 8
total:
14
20. Worksheet #6: Hatchling Measurements
Diamondback terrapin researchers can determine the range (lowest and highest numbers)
and mean (average) of hatchlings by measuring a number of individuals. Measure the
maximum carapace (top of shell) length of each terrapin hatchling in mm (see hatchling
#1 for example). Then add all of the measurements and divide by the number of
hatchlings. Present your findings as a range and mean (see example below). The “n”
represents the number in the sample size. In science, larger sample sizes (n) make the
data more statistically significant. This data came from a study in northeastern Florida.
example: maximum carapace length = 25.0-50.0 mm, mean = 37.5 mm (n = 10)
your results: maximum carapace length = ____-____ mm, mean = ____ mm (n = ____)
Terrapin # Maximum carapace length (mm)
1
2
3
4
5
6
7
8
9
10
total:
16
22. Diamondback Terrapin Word Find
U N W N O I T A V R E S N O C H N R V S U S R O Q
R I H U P N I H Y C R W N E O N U F O E W J B W N
H P A D D A U H I R L A F W A R G D G I T F U S E
P A T H E S A L T M A R S H G N U I P C H S O X M
W R C S E J X P Q W O P R H S H N M J E O E S P A
Z R H I E B P R E D A T I O N N W O S P I I Q F N
G E L K M D O R W E I Y Q D I B U R Y S T C I F G
X T I C F G T A C N R C B C E L R P G E A E L A R
A B N A E Q N Z T A I B I A B L V H I V R P Z S O
U Z G R Y F P C U S I A C M K Q Q I X I X S E H V
T H J B H J R T O S T H H K E K Q S K S E P S V E
C E X A S E S Z I L W R G C E D M M I A S I T S X
R Q H D W E K K X R N O I U D T N V C V H H S M T
A I W K E L A Z A E Z V M K J O F E K N G S E X T
B M O L L U S C I V O R E K E N O E N I V G V A V
P N H C M R K H P Y X Z J U R E J F O Z R A R F C
O N Z S Y S C X O U Y A P C L U T C H H R L A D O
T C Y D E K S O X R M E C A P A R A C N T F H G J
BEACH WRACK BOAT STRIKE BRACKISH
CARAPACE CLUTCH CONSERVATION
CRAB POT DIMORPHISM ENDEMIC
ESTUARY FLAGSHIP SPECIES FOOD CHAIN
HARVEST HATCHLING INVASIVE SPECIES
MANGROVE MOLLUSCIVORE PREDATION
SALT MARSH SEX RATIO TERRAPIN
18
26. Glossary of Terms
anthropogenic – something caused by humans
beach wrack - clumps of stranded seaweed
boat strike - direct injuries of wildlife by motorized watercraft
brackish - a mixture of fresh and salt water; “where rivers meet the sea”
bycatch reduction device (BRD) - a rectangular device designed to prevent diamondback
terrapins from entering blue crab pots
carapace - top of a turtle’s shell
chelonian – turtle
clutch - group of reptile eggs
coastal armoring - hardening of shoreline to prevent real estate property damage
conservation - the act of conserving or protecting wildlife and wild lands
crab pot - a trap designed to capture blue crabs
data - individual facts, statistics or items of information
dike - a long embankment or causeway to prevent flooding
endemic - species restricted or limited to specific states, regions or countries
estuarine - species that occur in brackish water habitats
estuary - an area where a river meets a sea, gulf or ocean and the mixing of fresh and
salt water occurs
exclude - to keep out
exploitation - to take advantage of unethically or unjustly for one’s own ends
22
27. extirpation - localized extinction
flagship species - a species chosen to represent an environmental cause
food chain - a succession of organisms in an ecological community that constitutes a
continuation of food energy from one organism to another as each consumes a lower
member and in turn is preyed upon by a higher member
harvest - catch, take or removal of wild species for human use
imperiled species - species at risk of increased endangerment or possible extinction
invasive species - species, both native and non-native, that reproduce and spread
aggressively
keystone species – a species that plays a pivotal role in the ecology of an ecosystem
mangrove - a type of tree that grows in coastal habitat waters
mean - an average for a range of numbers
molluscivore - a species that eats molluscs
predation - act of wildlife killing and eating another animal, including nests of eggs
radiograph - x-ray
range - a range of numbers from lowest to highest
salinity - amount of salt in water, often presented as parts per thousand (PPT)
salt marsh - a marshy tract of coastal land that occurs in brackish waters
sex ratio - ratio of males to females in a wildlife population
sexual dimorphism - difference in appearance between the male and female of a species
subsidized predators – animals, such as raccoons, that have higher than naturally
occurring population levels due to humans altering resource levels
23
28. synergy – interaction or cooperation of two or more agents that produce a combined
effect greater than the sum of their separate effects
temperature dependent sex determination (TDSD) - sex determined by the temperature
of a nest at a critical point in incubation of reptile eggs
tomium - the mouth plate of a turtle (composed of keratin)
umbrella species - a species with large area requirements; protection of umbrella species
offers protection to other species
24
29. Ten Things You Can Do to Help Protect Diamondback Terrapins
1. Support conservation organizations that work to protect diamondback terrapins, such
as the Florida Turtle Conservation Trust.
2. Help protect coastal wildlife habitat by supporting land conservation organizations,
such as The Nature Conservancy or land trust groups.
3. Help diamondback terrapins across the road. Always take them in the direction that
they are moving. Only adults (never children) should do this as some terrapins may bite
and vehicle traffic is extremely dangerous.
4. Leave wild diamondback terrapins where they belong. The removal of even small
numbers of turtles from the wild can cause populations to crash and in some cases not
recover.
5. Encourage recreational and commercial crabbers to use bycatch reduction devices on
all crab pots. Research in Florida waters has shown that this can significantly reduce
diamondback terrapin mortality, with no impact on the number or size of crabs captured.
6. Participate in organized ghost pot removal efforts.
7. Support regulations that will increase protection of diamondback terrapins and their
habitats. A current example is the need for regulatory change that would require
bycatch reduction devices on all crab pots used in Florida waters.
8. Participate in habitat clean-up efforts, such as the annual International Coastal
Cleanup. Check with your local conservation organizations on how you can get involved.
9. Support habitat restoration efforts. Restoring degraded natural areas can provide
improved habitat for wildlife, including turtles.
10. Learn about the natural history and conservation needs of this fascinating and
imperiled estuarine species. Teach others how they can assist in protecting these
ecologically significant vertebrates. Consider organizing a turtle educational awareness
event at your school, church, club, or local nature center.
25
30. Additional Teaching Resources
Publications:
Butler, J.A. and G.L. Heinrich. 2007. The effectiveness of bycatch reduction devices on
crab pots at reducing capture and mortality of diamondback terrapins (Malaclemys
terrapin) in Florida. Estuaries and Coasts 30:179-185. (available as a PDF at the
Diamondback Terrapin Working Group website: www.dtwg.org)
Butler, J.A., G.L. Heinrich, and R.A. Seigel. 2006. Third workshop on the ecology, status
and conservation of diamondback terrapins (Malaclemys terrapin): Results and
recommendations. Chelonian Conservation and Biology 5:331-334. (available as a PDF at
the Diamondback Terrapin Working Group website: www.dtwg.org)
Butler, J.A., R.A. Seigel, and B. Mealey. 2006. Malaclemys terrapin – diamondback
terrapin. Pages 279-295 in P.A. Meylan, editor. Biology and conservation of Florida
turtles. Chelonian Research Monographs 3:279-295. (available as a PDF at the
Diamondback Terrapin Working Group website: www.dtwg.org)
Brennessel, B. 2006. Diamonds in the marsh. University Press of New England. Lebanon,
NH. 219 pp. (ISBN: 978-1-58465-536-7)
Curtis, J.K. 2006. Turtles in my sandbox. Sylvan Dell Publishing, Mt. Pleasant, SC.
(ISBN: 978-0-9768823-74 for hardcover and 978-1-6071811-94 for paperback;
children’s book with additional resources available at www.sylvandellpublishing.com)
Parham, J.F., M.E. Outerbridge, B.L. Stuart, D.B. Wingate, H. Erlenkeuser, and T.J.
Papenfuss. 2008. Introduced delicacy or native species? A natural origin of Bermudian
terrapins supported by fossil and genetic data. Biology Letters 4:216-219. (available as a
PDF at the Diamondback Terrapin Working Group website: www.dtwg.org)
DVDs:
Tampa Bay: Living Legacy. 2006. Tampa Bay Estuary Program. A production of Public
Media Productions. (available from the Tampa Bay Estuary Program: www.tbep.org)
Terrapin. 1992. NJN. Produced by New Jersey Outdoors. (available from NJN:
www.njnstore.org)
26
31. Zoos, aquaria and nature centers in Tampa Bay that currently display diamondback
terrapins:
Florida Aquarium
(www.flaquarium.org)
Tampa’s Lowry Park Zoo
(www.lowryparkzoo.com)
Upper Tampa Bay Park
(www.hillsboroughcounty.org/parks/resources/forms/parkservices/trails96.pdf)
In addition, Tampa Bay Watch (www.tampabaywatch.org) has a diamondback terrapin
education program and exhibit in development. Public facilities such as these are
encouraged to address the lack of educational exhibits regarding terrapins.
Ghost pot removal program:
Tampa Bay Watch conducts a ghost pot removal program. Please contact them at
www.tampabaywatch.org for information on how to get involved.
Website:
Diamondback Terrapin Working Group: This working group was formed in 2004 with the
goals of uniting all individuals and organizations concerned with the decline of the species
and begin to lay the foundation for a rangewide conservation plan. The working group is
committed to and supports research, management, conservation, and education efforts
that benefit diamondback terrapin populations and their associated ecosystems within
the sixteen state range. This organization offers an excellent listserv and website,
which includes an extensive bibliography with PDFs. For more information on the working
group, please visit www.dtwg.org.
27
32. WANTED
Information on Diamondback Terrapin Sightings
We need your assistance with a distributional survey of this
imperiled brackish-water species in Tampa Bay. Exact locations
(GPS coordinates preferred) and photos would be of great value.
Dr. Joseph A. Butler George L. Heinrich
University of North Florida Heinrich Ecological Services
(904) 620-2831 (727) 865-6255
jbutler@unf.edu george@heinrichecologicalservices.com
33. Educator’s Guide Evaluation Form
Did you copy any of the educator’s guide to distribute to students or other groups?
Yes No
On a scale of 1-10, how useful was the educator’s guide in helping you teach students or
other groups about diamondback terrapins (with 10 being the most useful)?
1 2 3 4 5 6 7 8 9 10
What was your impression and that of your students or other groups toward the
worksheets?
What was your general impression of the educator’s guide?
Do you have any suggestions for improving the educator’s guide?
Do you think that your students or other groups gained a better appreciation for the
importance and conservation of diamondback terrapins due to this educator’s guide?
Do you think that your students or other groups gained a better appreciation for the
importance and conservation of brackish coastal habitats due to this educator’s guide?
Do you have any suggestions for classroom activities that we can include in future
editions of this educator’s guide?
Thank you for helping us to continue to improve this guide!
Please return your completed form to: Florida Turtle Conservation Trust, 1213 Alhambra
Way S., St. Petersburg, FL 33705-4620.
29
34. George L. Heinrich is a field biologist and environmental educator specializing in Florida
turtles. His company, Heinrich Ecological Services, is based in St. Petersburg, Florida
and conducts wildlife surveys and research, natural history programming, and nature-
based tours. A graduate of Memphis State University, his research interests focus on
anthropogenic threats to Florida’s non-marine turtles. Current collaborative projects
include two imperiled emydids, the diamondback terrapin and Suwannee cooter. His
conservation education efforts include an annual four-day Florida turtle workshop for
educators offered since 1993. George is an invited member of the IUCN Tortoise and
Freshwater Turtle Specialist Group, served twice as co-chair of the Gopher Tortoise
Council, was the founding president of the Florida Turtle Conservation Trust, and served
as the Florida regional representative of the Diamondback Terrapin Working Group.
(george@heinrichecologicalservices.com)
Timothy J. Walsh became actively involved in herpetology at the age of ten and has
maintained an obsession ever since. At age twelve, he was mentored by Dr. Jim Layne of
Archbold Biological Station. Tim went on to receive a degree in Zoo Animal Technology
and has worked in the zoo, aquarium and museum field since 1992. He held the position of
Collection Manager with the Chelonian Research Institute (Oviedo, Florida) and has been
involved in a variety of research projects with such species as Carolina diamondback
terrapins, spotted turtles and Suwannee cooters. A member of the IUCN Tortoise and
Freshwater Turtle Specialist Group, he is also an avid outdoorsman, accomplished
photographer, and book collector. Tim is currently the Manager of NatureWorks for the
Orlando Science Center where he is able to share his passion for turtles and the natural
world with children and adults alike. (turtleconservationist@gmail.com)
Dr. Joseph A. Butler did his undergraduate studies at Miami University (Ohio) and
earned his Ph.D. from Ohio University. He has been a member of the biology department
at the University of North Florida since 1989. Joe has studied snake physiology and
ecology in Nigeria, West Africa and marine turtles on the Caribbean island of St. Kitts.
He has also studied diamondback terrapins throughout Florida since 1995. Joe has
served as co-chair of the Gopher Tortoise Council and as a founding co-chair of the
Diamondback Terrapin Working Group. (jbutler@unf.edu)
Charles H. Miller earned a Bachelor of Science degree in Biology Education from St.
Petersburg College. He is certified to teach middle grades science and is currently
assigned to Tampa Charter School. Charlie spends his summers as an instructor with
Boyd Hill Nature Preserve’s summer nature camp program and has extensive field
experience. He is a talented wildlife artist and has long supported the educational
efforts of the Florida Turtle Conservation Trust. (chmturtleman74@aol.com)
35. Florida Turtle Conservation Trust
The Florida Turtle Conservation Trust (FTCT) was formed in 1999 by a group of
biologists and conservationists concerned with the conservation outlook for Florida
turtles. This membership-based NGO focuses its efforts on the conservation of non-
marine turtles, with current projects targeting diamondback terrapins and riverine
species. This work is done through the education and engagement of diverse target
audiences. Areas of focus include the development of educational programs and
materials, coordination of community-supported habitat cleanups, identification of
existing threats, and development of recommendations resulting in positive change.
Certainly, the threats to Florida turtles and their associated ecosystems present broad
conservation challenges. However, despite the apparent urgency of the situation, the
opportunities for conservation remain great. The FTCT welcomes individuals that want to
join us in working to conserve Florida’s rich turtle diversity. To learn more, please visit
www.ftct.org.
Heinrich Ecological Services
Heinrich Ecological Services (HES) is based in St. Petersburg, Florida and conducts
wildlife surveys and research, natural history programming, and nature-based tours.
Environmental education is a major focus of HES efforts and special emphasis is placed
on training naturalists, land managers and educators. Related programs include an annual
four-day Florida turtle workshop for formal and non-formal educators, and Florida turtle
natural history tours. Cooperative efforts with site-based educators allow HES to offer
classroom and field programs for students throughout central Florida. For more
information, please visit www.heinrichecologicalservices.com.
Tampa Bay Estuary Program
The Tampa Bay Estuary Program (TBEP) is a partnership of local governments and state
and federal environmental agencies that was formed in 1990 to develop a conservation
and management plan for Tampa Bay. In addition to conducting research and
implementing strategies for bay restoration, TBEP also develops programs to educate
citizens about ways to prevent water pollution and protect Tampa Bay. The Tampa Bay
Estuary Program invites you to explore the bay through their website (www.tbep.org),
learn more about what they do and join them in working to keep Tampa Bay on the road to
recovery!