This document summarizes the threats facing turtle conservation and provides information about several turtle species. It discusses major threats such as consumption of turtle eggs, artificial lighting, beach armouring, beach nourishment, predators, commercial fisheries, oil and gas exploration, ingestion of marine debris. It also provides details about specific turtle species like the hawksbill sea turtle, green sea turtle, leatherback sea turtle and olive ridley sea turtle. The document concludes by suggesting actions people can take to help turtle conservation like not eating turtle eggs and not destroying turtle habitat.
Fish Tagging methods used to monitor fish populations are movement mapping, or tracking, and mark and recapture. Tracking is a process in which marine biologists and resource managers use technology to tag fish and map their movements.
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.
They are cold blooded animals
Fish Tagging methods used to monitor fish populations are movement mapping, or tracking, and mark and recapture. Tracking is a process in which marine biologists and resource managers use technology to tag fish and map their movements.
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.
They are cold blooded animals
1. Aquaculture – An Introduction
2.The development process
3.Major classification of aquaculture
4.Aqua farming in India… Types
5.Recent trends and status of freshwater fishculture technology in India
6.Indian freshwater fisheries
7.Available technology
8.The production processes
9.Composite fish culture
10.Trends in fish consumption and its impact on the fish production
11.Availability of fish and fishery products
12.Factors influencing the consumption
13.Trends in fish consumption
Almost all natural bodies of water bear fish life, the exceptions being very hot thermal ponds and extremely salt-alkaline lakes such as the Dead Sea and Great Salt Lake. The fishes belong to the most numerous and diversified group among vertebrates. They dominate the water bodies of the world through a variety of morphological, physiological and behavioral adaptations. They have been in existence for more than 450 million years. A total of 24618 species of fishes belonging to 482 families and 4258 genera have so far been described. About 58% of the fish species are marine while 41% are freshwater inhabitants and 1% migrants. In our Indian region alone, there are 2,500 species of which 930 are inhabitants of freshwater and the rest live in the seas. In other words, India harbours 11.5% of the fish fauna so far known in the world. There are over 800 living species of sharks and rays, 30 species of chimaeras and ratfishes, 6 species of lung fishes, 1 species of coelacanths, 36 species of long ray finned bichirs, sturgeons and paddlefishes. The Neopterygii are the rest of the known species of modem fishes. All these fishes inhabit various niches in the aquatic environment. The diversified habitats of fishes include open oceans, deep oceanic trenches, nearshore waters, saline coastal embayments, brackishwaters, estuaries, intermittent streams, tiny desert springs, vernal pools, cold mountain streams, lakes, ponds, etc.
This presentation is for my school assessment on global environments. I chose coral reefs. My project explains coral reefs and the geographical processes involved with it as well.
crocodiles are the only reptiles having 4 chambered heart,flattened tail and body covered with scutes.hind limb is webbed and in this ppt you can discover all the facts about crocodile..hope you can enjoy
Cryopreservation and its application to aquaculture.pptxNarsingh Kashyap
What is Cryopreservation ?
Cryopreservation is a process where biological materials such as cells and tissues are preserved by cooling to very low temperatures, usually at -196°C (the temperature of liquid nitrogen), yet remain viable after later warming to temperatures above 0°C.
Cryopreservation in aquatic species goes back 65 years and began about the same time as similar research was performed in livestock (Blaxter 2011).
In India, NBFGR & CIFA are the primary organization carrying out fish sperm cryopreservation for long term gene banking (J. K. Jena 2012)
Marine protected area Marine protected areas (MPA) are protected areas of seas, oceans, estuaries or in the US, the Great Lakes .[2] These marine areas can come in many forms ranging from wildlife refuges to research facilities.[3] MPAs restrict human activity for a conservation purpose, typically to protect natural or cultural resources.[4] Such marine resources are protected by local, state, territorial, native, regional, national, or international authorities and differ substantially among and between nations. This variation includes different limitations on development, fishing practices, fishing seasons and catch limits, moorings and bans on removing or disrupting marine life. In some situations (such as with the Phoenix Islands Protected Area), MPAs also provide revenue for countries, potentially equal to the income that they would have if they were to grant companies permissions to fish.[5]
On 28 October 2016 in Hobart, Australia, the Convention for the Conservation of Antarctic Marine Living Resources agreed to establish the first Antarctic and largest marine protected area in the world encompassing 1.55 million km2 (600,000 sq mi) in the Ross Sea.[6] Other large MPAs are in the Indian, Pacific, and Atlantic Oceans, in certain exclusive economic zones of Australia and overseas territories of France, the United Kingdom and the United States, with major (990,000 square kilometres (380,000 sq mi) or larger) new or expanded MPAs by these nations since 2012—such as Natural Park of the Coral Sea, Pacific Remote Islands Marine National Monument, Coral Sea Commonwealth Marine Reserve and South Georgia and the South Sandwich Islands Marine Protected Area. When counted with MPAs of all sizes from many other countries, as of August 2016 there are more than 13,650 MPAs, encompassing 2.07% of the world's oceans, with half of that area – encompassing 1.03% of the world's oceans – receiving complete "no-take" designation.[7]
2014-2015
Overview :
Many fisheries are non-selective fishing gear catching animals that they did not intend to. This non-taget extra catch is known as ‘bycatch’.
Of these bycatch species, some have a commercial value and are brought back to land by fishers to be sold. However, a large proportion is unwanted and so is discarded-thrown back over the side of the boat.
The mean of bycatch & discards
environmental & social Impacts
Some strategies & solutions
Some bycatch reduction devises in shrimp trawls :
TEDs
JTEDs
RES
Square mesh codends
Fisheyes
Square mesh window
Relation between effort & bycatch
Effects of cod-end mesh size on the catch discarded
Modern developments in transport technology are from two levels; one is from an understanding of internal physiological mechanisms of the fish and the optimal requirements, ensuring maximum survival of fish under transport and the other is from a study of the environmental parameters of the medium in which fish are transported. Under anaesthesia fish can be transported without water even, provided the skin and gills are kept moist under low temperature. The cryopreservation of fish sperm for use at any convenient time can be referred to here, though this would concern seed production more directly than live seed transport.
fish population dynamics, Population structureDegonto Islam
Estimation of fish population dynamics are often based on age structures. Understanding past
population structure is of interest to evolutionary biologists because it can reveal when migration
regimes changed in natural populations, thereby pointing to potential environmental factors such as
climate changes as driving evolutionary forces. Characterizing the structure of extent populations is also
key to conservation genetics as translocation or reintroduction decisions must preserve evolutionary
stable units. Finally, population structure has important biomedical consequences either when a number
of subpopulation groups is locally adapted to particular environmental conditions (and maladapted
when exposed to new environments) or represents a confounding factor in the study of the statistical
association between genetic variants and phenotyp
A bright factual presentation for youth which includes a section on bullying. Humourous at times--Sea Turtles bullying each other. Langs Health, Wellness and Community Centre in Cambridge Ontario,
1. Aquaculture – An Introduction
2.The development process
3.Major classification of aquaculture
4.Aqua farming in India… Types
5.Recent trends and status of freshwater fishculture technology in India
6.Indian freshwater fisheries
7.Available technology
8.The production processes
9.Composite fish culture
10.Trends in fish consumption and its impact on the fish production
11.Availability of fish and fishery products
12.Factors influencing the consumption
13.Trends in fish consumption
Almost all natural bodies of water bear fish life, the exceptions being very hot thermal ponds and extremely salt-alkaline lakes such as the Dead Sea and Great Salt Lake. The fishes belong to the most numerous and diversified group among vertebrates. They dominate the water bodies of the world through a variety of morphological, physiological and behavioral adaptations. They have been in existence for more than 450 million years. A total of 24618 species of fishes belonging to 482 families and 4258 genera have so far been described. About 58% of the fish species are marine while 41% are freshwater inhabitants and 1% migrants. In our Indian region alone, there are 2,500 species of which 930 are inhabitants of freshwater and the rest live in the seas. In other words, India harbours 11.5% of the fish fauna so far known in the world. There are over 800 living species of sharks and rays, 30 species of chimaeras and ratfishes, 6 species of lung fishes, 1 species of coelacanths, 36 species of long ray finned bichirs, sturgeons and paddlefishes. The Neopterygii are the rest of the known species of modem fishes. All these fishes inhabit various niches in the aquatic environment. The diversified habitats of fishes include open oceans, deep oceanic trenches, nearshore waters, saline coastal embayments, brackishwaters, estuaries, intermittent streams, tiny desert springs, vernal pools, cold mountain streams, lakes, ponds, etc.
This presentation is for my school assessment on global environments. I chose coral reefs. My project explains coral reefs and the geographical processes involved with it as well.
crocodiles are the only reptiles having 4 chambered heart,flattened tail and body covered with scutes.hind limb is webbed and in this ppt you can discover all the facts about crocodile..hope you can enjoy
Cryopreservation and its application to aquaculture.pptxNarsingh Kashyap
What is Cryopreservation ?
Cryopreservation is a process where biological materials such as cells and tissues are preserved by cooling to very low temperatures, usually at -196°C (the temperature of liquid nitrogen), yet remain viable after later warming to temperatures above 0°C.
Cryopreservation in aquatic species goes back 65 years and began about the same time as similar research was performed in livestock (Blaxter 2011).
In India, NBFGR & CIFA are the primary organization carrying out fish sperm cryopreservation for long term gene banking (J. K. Jena 2012)
Marine protected area Marine protected areas (MPA) are protected areas of seas, oceans, estuaries or in the US, the Great Lakes .[2] These marine areas can come in many forms ranging from wildlife refuges to research facilities.[3] MPAs restrict human activity for a conservation purpose, typically to protect natural or cultural resources.[4] Such marine resources are protected by local, state, territorial, native, regional, national, or international authorities and differ substantially among and between nations. This variation includes different limitations on development, fishing practices, fishing seasons and catch limits, moorings and bans on removing or disrupting marine life. In some situations (such as with the Phoenix Islands Protected Area), MPAs also provide revenue for countries, potentially equal to the income that they would have if they were to grant companies permissions to fish.[5]
On 28 October 2016 in Hobart, Australia, the Convention for the Conservation of Antarctic Marine Living Resources agreed to establish the first Antarctic and largest marine protected area in the world encompassing 1.55 million km2 (600,000 sq mi) in the Ross Sea.[6] Other large MPAs are in the Indian, Pacific, and Atlantic Oceans, in certain exclusive economic zones of Australia and overseas territories of France, the United Kingdom and the United States, with major (990,000 square kilometres (380,000 sq mi) or larger) new or expanded MPAs by these nations since 2012—such as Natural Park of the Coral Sea, Pacific Remote Islands Marine National Monument, Coral Sea Commonwealth Marine Reserve and South Georgia and the South Sandwich Islands Marine Protected Area. When counted with MPAs of all sizes from many other countries, as of August 2016 there are more than 13,650 MPAs, encompassing 2.07% of the world's oceans, with half of that area – encompassing 1.03% of the world's oceans – receiving complete "no-take" designation.[7]
2014-2015
Overview :
Many fisheries are non-selective fishing gear catching animals that they did not intend to. This non-taget extra catch is known as ‘bycatch’.
Of these bycatch species, some have a commercial value and are brought back to land by fishers to be sold. However, a large proportion is unwanted and so is discarded-thrown back over the side of the boat.
The mean of bycatch & discards
environmental & social Impacts
Some strategies & solutions
Some bycatch reduction devises in shrimp trawls :
TEDs
JTEDs
RES
Square mesh codends
Fisheyes
Square mesh window
Relation between effort & bycatch
Effects of cod-end mesh size on the catch discarded
Modern developments in transport technology are from two levels; one is from an understanding of internal physiological mechanisms of the fish and the optimal requirements, ensuring maximum survival of fish under transport and the other is from a study of the environmental parameters of the medium in which fish are transported. Under anaesthesia fish can be transported without water even, provided the skin and gills are kept moist under low temperature. The cryopreservation of fish sperm for use at any convenient time can be referred to here, though this would concern seed production more directly than live seed transport.
fish population dynamics, Population structureDegonto Islam
Estimation of fish population dynamics are often based on age structures. Understanding past
population structure is of interest to evolutionary biologists because it can reveal when migration
regimes changed in natural populations, thereby pointing to potential environmental factors such as
climate changes as driving evolutionary forces. Characterizing the structure of extent populations is also
key to conservation genetics as translocation or reintroduction decisions must preserve evolutionary
stable units. Finally, population structure has important biomedical consequences either when a number
of subpopulation groups is locally adapted to particular environmental conditions (and maladapted
when exposed to new environments) or represents a confounding factor in the study of the statistical
association between genetic variants and phenotyp
A bright factual presentation for youth which includes a section on bullying. Humourous at times--Sea Turtles bullying each other. Langs Health, Wellness and Community Centre in Cambridge Ontario,
The classic Filipino folk tale as adapted and retold by renowned teacher trainer Marco Brazil. This beautifully illustrated story book features additional keyword illustrations and an interactive 'Question Time' feature for each page, making it not just a story book but a fun and effective language learning tool. A must for every Young Learner classroom!
Whale Shark The largest of all sharks and the largest living fish, the whale shark is one of the most dramatic views of the ocean. Its large size, distinctive patterns and its enormous mouth make it instantly recognizable and can be commonly seen wandering near the surface in tropical and subtropical waters around the world. Their diet is based mainly on plankton, but also regularly feed on small schooling fish and squid. Unlike basking sharks, which simply filter vast amounts of water as they swim, whale sharks actively suck their prey before filtering efficiently and are sometimes seen in groups, feeding on high concentrations of food. Regularly appear in the same places at specific times of the year, probably to capitalize on plankton blooms and events such as coral spawning.
Threat of sea turtle Rajeev raghavan Kufos kerala Ashish sahu
Sea turtles, sometimes called marine turtles, are reptiles of the order Testudines and of the suborder Cryptodira. The seven existing species of sea turtles are the green sea turtle, loggerhead sea turtle, Kemp's ridley sea turtle, olive ridley sea turtle, hawksbill sea turtle, flatback sea turtle, and leatherback sea turtle.
Sea turtle, any of seven species of marine turtles belonging to the families Dermochelyidae (leatherback sea turtles) and Cheloniidae (green turtles, flatback sea turtles, loggerhead sea turtles, hawksbills, and ridleys).
Seven different species of sea (or marine) turtles grace our ocean waters, from the shallow seagrass beds of the Indian Ocean, to the colorful reefs of the Coral Triangle, and even the sandy beaches of the Eastern Pacific. WWFs work on sea turtles focuses on five of those species: green, hawksbill, loggerhead, leatherback and olive ridley.
See more on worldwildlife.org
This is a presentation about Sea Turtles. It describes each type of turtle and explains why they are an endangered species. It also includes recent pictures taken of a Sea Turtle release at Vanderbilt Beach in Naples, Florida. The health of thousands of turtles was compromised by the record cold gulf temperatures in Florida in January 2010, causing the Sea Turtles to stop moving and swimming. The Florida State Wildlife Conservation Commission and other many other groups of professionals and volunteers teamed together to warm the turtles, return them to health, then release them back into the wild. This presentation describes ways to help Sea Turtles increase their numbers and provides resources for further study.
In the absence of effective treatment and a human vaccine, raising awareness of the risk factors for Ebola infection and the protective measures individuals can take is the only way to reduce human infection and death.
In the absence of effective treatment and a human vaccine, raising awareness of the risk factors for Ebola infection and the protective measures individuals can take is the only way to reduce human infection and death.
Willie Nelson Net Worth: A Journey Through Music, Movies, and Business Venturesgreendigital
Willie Nelson is a name that resonates within the world of music and entertainment. Known for his unique voice, and masterful guitar skills. and an extraordinary career spanning several decades. Nelson has become a legend in the country music scene. But, his influence extends far beyond the realm of music. with ventures in acting, writing, activism, and business. This comprehensive article delves into Willie Nelson net worth. exploring the various facets of his career that have contributed to his large fortune.
Follow us on: Pinterest
Introduction
Willie Nelson net worth is a testament to his enduring influence and success in many fields. Born on April 29, 1933, in Abbott, Texas. Nelson's journey from a humble beginning to becoming one of the most iconic figures in American music is nothing short of inspirational. His net worth, which estimated to be around $25 million as of 2024. reflects a career that is as diverse as it is prolific.
Early Life and Musical Beginnings
Humble Origins
Willie Hugh Nelson was born during the Great Depression. a time of significant economic hardship in the United States. Raised by his grandparents. Nelson found solace and inspiration in music from an early age. His grandmother taught him to play the guitar. setting the stage for what would become an illustrious career.
First Steps in Music
Nelson's initial foray into the music industry was fraught with challenges. He moved to Nashville, Tennessee, to pursue his dreams, but success did not come . Working as a songwriter, Nelson penned hits for other artists. which helped him gain a foothold in the competitive music scene. His songwriting skills contributed to his early earnings. laying the foundation for his net worth.
Rise to Stardom
Breakthrough Albums
The 1970s marked a turning point in Willie Nelson's career. His albums "Shotgun Willie" (1973), "Red Headed Stranger" (1975). and "Stardust" (1978) received critical acclaim and commercial success. These albums not only solidified his position in the country music genre. but also introduced his music to a broader audience. The success of these albums played a crucial role in boosting Willie Nelson net worth.
Iconic Songs
Willie Nelson net worth is also attributed to his extensive catalog of hit songs. Tracks like "Blue Eyes Crying in the Rain," "On the Road Again," and "Always on My Mind" have become timeless classics. These songs have not only earned Nelson large royalties but have also ensured his continued relevance in the music industry.
Acting and Film Career
Hollywood Ventures
In addition to his music career, Willie Nelson has also made a mark in Hollywood. His distinctive personality and on-screen presence have landed him roles in several films and television shows. Notable appearances include roles in "The Electric Horseman" (1979), "Honeysuckle Rose" (1980), and "Barbarosa" (1982). These acting gigs have added a significant amount to Willie Nelson net worth.
Television Appearances
Nelson's char
"Understanding the Carbon Cycle: Processes, Human Impacts, and Strategies for...MMariSelvam4
The carbon cycle is a critical component of Earth's environmental system, governing the movement and transformation of carbon through various reservoirs, including the atmosphere, oceans, soil, and living organisms. This complex cycle involves several key processes such as photosynthesis, respiration, decomposition, and carbon sequestration, each contributing to the regulation of carbon levels on the planet.
Human activities, particularly fossil fuel combustion and deforestation, have significantly altered the natural carbon cycle, leading to increased atmospheric carbon dioxide concentrations and driving climate change. Understanding the intricacies of the carbon cycle is essential for assessing the impacts of these changes and developing effective mitigation strategies.
By studying the carbon cycle, scientists can identify carbon sources and sinks, measure carbon fluxes, and predict future trends. This knowledge is crucial for crafting policies aimed at reducing carbon emissions, enhancing carbon storage, and promoting sustainable practices. The carbon cycle's interplay with climate systems, ecosystems, and human activities underscores its importance in maintaining a stable and healthy planet.
In-depth exploration of the carbon cycle reveals the delicate balance required to sustain life and the urgent need to address anthropogenic influences. Through research, education, and policy, we can work towards restoring equilibrium in the carbon cycle and ensuring a sustainable future for generations to come.
Characterization and the Kinetics of drying at the drying oven and with micro...Open Access Research Paper
The objective of this work is to contribute to valorization de Nephelium lappaceum by the characterization of kinetics of drying of seeds of Nephelium lappaceum. The seeds were dehydrated until a constant mass respectively in a drying oven and a microwawe oven. The temperatures and the powers of drying are respectively: 50, 60 and 70°C and 140, 280 and 420 W. The results show that the curves of drying of seeds of Nephelium lappaceum do not present a phase of constant kinetics. The coefficients of diffusion vary between 2.09.10-8 to 2.98. 10-8m-2/s in the interval of 50°C at 70°C and between 4.83×10-07 at 9.04×10-07 m-8/s for the powers going of 140 W with 420 W the relation between Arrhenius and a value of energy of activation of 16.49 kJ. mol-1 expressed the effect of the temperature on effective diffusivity.
12. Hawksbill Sea Turtle The harder-to-pronounce (scientific) name: Eretmochelys imbricata A name doesn't always describe a critter ... For example, the olive ridley turtle isn't always olive-colored and it certainly doesn't have a red head (like the pimento in an olive!), and the green sea turtle isn't all that green. In the case of the hawksbill turtle, however, its name does describe a unique feature of this reptile. Hawksbill turtles really do have mouths which resemble a hawk's beak! To add to this birdlike appearance, their longish heads become narrower near their mouths and their lower jaw is V-shaped. The hawksbill is a small-to-medium-size sea turtle, ranging from 30 to 36 inches in shell length and weighing from 100 to 200 pounds. When very young, their shell is heart-shaped, but as they grow older the shell sort of stretches out, and the "heart" becomes much longer. The worst thing about the hawksbill sea turtle is that the scutes, or scales, on its shell are beautiful. The reason this is bad is that the pretty amber scutes with their streaks of brown and black are the source of "tortoise shell," which people like to use for all kinds of jewelry and trinkets. Their beautiful scutes cost many hawksbill turtles their lives. Hawksbills live in different places at different stages of their life. Little baby hawksbill sea turtles usually crack out of their egg shells at night, opening their brand new eyes on a Caribbean beach. Not a bad way to start! It is believed that the very young hawksbills take shelter in weedlines. As they grow, Hawksbills venture into coastal waters throughout central Atlantic and Indo-Pacific regions. Here they seek shelter in the ledges and caves of coral reef systems. They also eat the sponges which are commonly found on reefs. With food and shelter taken care of, the turtles thoughts turn to love! After courtship and mating, it's nesting time for the female hawksbills. Their six month nesting season between July and October is longer than that of other sea turtles. When the time and place is right, "mom" crawls out of the sea, picks a just-right site for her nest, goes about the task of digging the pit which serves as a "nest", lays around a hundred or so eggs, covers them with sand, then disguises them with vegetation, and finally drags her tired self back to the sea. When the babies begin to crack out of their eggs, the hawksbill life cycle begins again.
13. Green Sea Turtle The harder-to-pronounce (scientific) name: Chelonia mydas Strange, but the green sea turtle is not that green. It's certainly not as green as a Teenage Mutant Ninja Turtle. In fact, its shell has been described as being mostly black or brownish, with swirls of olive and gold. It is, however, the largest hard-shelled sea turtle with adults weighing in at an average of between 200 and 300 pounds with a shell length of between 36 and 43 inches. Despite this, its head is small in comparison to other sea turtles – but don't be too tempted to poke fun at the green sea turtle, because the biting edge of its lower jaw is serrated like a very sharp knife! But luckily, it's a vegetarian! It mostly hangs around the coasts and islands in the tropical and subtropical Atlantic Ocean, Gulf of Mexico, along the Argentine coast, in the Mediterranean Sea, and the Indo-Pacific. Little baby green sea turtles are only two inches long and are black on top with white underneath. As the turtle grows up, its shell remains mostly black with while the body turns orange or yellowish orange. Juvenile or young turtles show up a lot in Florida waters, especially in areas with lots of sea grasses. Green sea turtles, like all sea turtles, are very different from land or freshwater turtles. All sea turtles have flatter, more streamlined shells which helps them swim through the water faster. Instead of feet for walking, sea turtles have flippers which are better for swimming. The flippers aren't much good on land, however, and walking is already hard for a sea turtle because they are usually pretty big and heavy. One other interesting thing about a sea turtle's flippers is that they cannot be pulled into their shells. Land turtles can pull their feet into their shells for protection, but a sea turtle can't. That's bad news if the turtle can't out swim a predator, because the flippers aren't protected by its hard shell ... Ouch!
14. Leatherback Sea Turtle The harder-to-pronounce (scientific) name: Dermochelys coriacea A turtle of superlatives, the leatherback is in a class by itself – Dermochelys, instead of Cheloniidae. It is the largest sea turtle and the largest reptile on earth today by weight – usually between 1600 and 1400 pounds. Its shell length is between six and seven feet long. Its front flippers are longer than those of other marine turtles. The leatherback travels the farthest, dives the deepest, and goes into the coldest waters. And then, there's that name ... Instead of having a hard shell on its back like other turtles, the leatherback has rubbery skin that is sort of flexible and sort of, well, leathery, hence its name! Also unlike other species of sea turtle, the leatherback doesn't have scales. Instead, underneath its leather back, it has bony ridges. Despite this "thinner skin", leatherback turtles roam farther into the cold, northern waters than any other land or water reptile, all the way up into the northern Pacific ocean. They have been seen in the Gulf of Alaska and south of the Bering Sea! Leatherbacks can get away with this because, like some oceanic fish, they retain heat from swimming. How they retain this heat is a little more complicated, but is had to do with their circulation system and their large volume-to-surface area ratio. (You may want to think about that one for a second. Hmm, volume-to-surface area ratio ... that would have something to do with their being 1600 to 1400 pounds and six to seven feet long in the shell ...) Leatherback sea turtles cover a lot of area in their travels. After all that travel and swimming in the cold water, the leatherback sea turtle likes to eat something tangy, like jellyfish! They've been spotted around Chile in the southeastern Pacific, New Foundland and Labrador in the North Atlantic, throughout the Indian Ocean, and Tasmania, and New Zealand in the southwestern Pacific. These ocean-going turtles are said to come into coastal waters only during breeding season and, lucky for the hatchlings, they typically nest in the tropics. Hatchlings are two to two-and-a-half inches long and are mostly black, but their flippers are white.
15. Olive Ridley Sea Turtle The harder-to-pronounce (scientific) name: Lepidochelys olivacea Some olive ridley sea turtle actually are olive green in color (but no pimento), however, others are black or grayish-brown. The turtle's protective shell is heart-shaped or round, and in adults is usually between 24 and 30 inches long. The olive ridley, along with the Kemp's ridley, are the smallest of the sea turtles, and the olive ridley usually weighs "only" around 100 pounds. Both kinds of ridleys are unusual because they makes nests every year, while other sea turtles have seasons where they don't breed. Olive ridley turtle moms do something really unusual and pretty spectacular – many, many, many of them go to specific beaches at the same time to make their nests and lay eggs! These communal nesting beaches are called "arribadas". In English, arribada translates to "arrival by sea" which is exactly what the turtle moms do! There are several arribada beaches along the Pacific coast of Mexico, Costa Rica, Nicaragua and Panama. Four arribada sites have been reported along Indian Ocean coastal areas an in the Atlantic small arribadas have been reported from one area. Females holding between 100 and 110 eggs can wait weeks for the right time to come ashore and nest. It is hard to say what conditions are right for the arribada, it could be moon or tide phases, climate or weather conditions, but the continued occurrences of several large arribadas has helped make the olive ridley the sea turtle with the greatest population. Imagine a quiet night on the beach with the only light coming from the moon above. Slowly, multitudes of turtles begin to emerge from the water, climbing the beach. They eventually stop and begin digging in the sand. They burrow in for a bit, leaving their eggs and then using their flippers shovel the sand back into the hole they just dug, over their eggs. Then, more slowly than before, they move back down the beach, into the sea and then they are gone! After that, the turtle mom needs a tropical vacation – luckily that's where she and other olive ridleys live! The olive ridleys are joined in their tropical habitat by the leatherback sea turtles. Both live in tropical regions of Pacific, Indian, and Atlantic Oceans, and both nest primarily on Pacific shores of the American tropics and in the Guianas. Recent studies show that olive ridleys reside in the eastern Pacific Ocean during the non-reproductive portion of its life cycle. Olive ridleys munch on crabs, shrimp, rock lobsters and jellyfish.
16. WHY IS TURTLES GETTING LESSER CONSUMPTION Unfortunately for sea turtles, their eggs are still considered highly desirable for a number of reasons. For example, some locals believes turtle eggs can give men an extra mile during sexual intercourse, there is no medical evidence that such is true. The consumption of turtle eggs continues to be a very serious problem. ARTIFICIAL LIGHTING Baby turtles find their way to the sea by the light reflected off the ocean. Artificial lighting from buildings, street lights, and beachfront properties has a disorienting effect on little turtles. The problem of beachfront lighting is not just limited to baby turtles. Adult turtles can mistakenly move inland after egg laying, and females tend to avoid areas where beachfront lightings is most intense. Turtle also abort nesting attempts more often in lighted areas.
17. BEACH ARMOURING Beach armoring includes the building of sea walls, sandbag installations, groins and jetties. Such practices save structures and property from erosion, but ultimately result in environmental damage and loss of a dry nesting beach. BEACH NOURISHMENT / BEACH CLEANING Beach nourishment is the practice of adding sand onto a beach to rebuild what has been lost through erosion. Beach nourishment affects turtles by direct burial of nests, or by disturbing nesting activity during the nesting season. Heavy equipment on beaches can pack the sand, making it impossible for turtle to dig proper nest. Human use of nesting beaches sometimes prompts beach cleaning activity, such as raking and the use of mechanical equipment. Not only can existing nests be disturbed by beach cleaning, it can also result in compacted beaches that are difficult or impossible to use for nesting.
18. PREDATORS Turtle eggs are particularly vulnerable to predators. Many animals seem to be aware of the nesting cycle of marine turtles, and eagerly gather to ravish nests once the turtles have made them. For example, monitor lizards have been known to destroy as much as 80% of all nests on a beach. The threat does not end when the egg is hatched. A hatchling must escape the clutches of animals and birds as it tries to reach the water, and even when it reaches the ocean, predators such as sharks await them. Of course, the most dangerous predator of all is Homo sapiens.
19. COMMERCIAL FISHERIES The most serious marine environment threat to turtles is commercial fishing. In some parts of the world, turtles are still hunted, both for food and for their shells. In places where turtle hunting is banned, the incidental taking of turtles during other fishing operations remains a major threat. Shrimp trawlers trap and drown turtles. Gill nets also snare turtles and frequently are not pulled soon enough to free the turtle before they drown.
20. OIL & GAS EXPLORATION Human attempts to exploit offshore oil & gas reserves pose a serious threat to marine turtles for several reasons. Activities associated with developing offshore oil and gas resources can destroy or seriously disrupt foraging habitat and nesting habitat. Dredging not only destroy habitat, it also results in the incidental injuring or killing of sea turtles. The presence of offshore structures alters the characteristics of nesting areas in ways that could well affect nesting habits. The exploitation of offshore oil and gas reserves also leads to oil spills and the presence of tar in the water. Both of these pollutants have serious effects on marine turtles. Oil on the skin and shell of a marine turtle can affect respiration and salt gland functions, as well as the turtle's blood chemistry. The ingestion of tar pellets is also a major concern. In was reported in 1985 that tar balls were the second most common type of ingested debris.
21. INGESTION OF MARINE DEBRIS We humans are terribly irresponsible when it comes to garbage thrown into the ocean or allowed to find its way there through neglect. This has numerous effects on the marine environment, but one particularly gruesome aspect of this problem is the ingestion of marine debris by turtles. It is widely assumed-and available evidence supports this theory--that hatchling turtles spend their "lost years" drifting with sargassum and other sea grasses. Unfortunately, drifting garbage collects in the same places as the seaweeds do. Young turtles inevitably attempt to eat some of this material, with devastating consequences. Plastic resembles food closely enough to fool even a mature turtle. Ingested plastic is not only toxic, it also obstructs the stomach and prevents the turtle from receiving nutrition from real food. This can often lead to a lingering death.
22. The Sea is not a garbage can. It is where most of our food comes from. Would you want to eat from a garbage can? Source: Marine Conservation Society, U.K.
23. IS THAT ALL No, of course not. We have listed just the most serious threats. There are strings of others for example the use of sodium cyanide in fishing, blast fishing, fertilizer that seeps into the sea has the same destructive effects as sewage. It won't hurt to review the list of threats provided here, and then ponder how many of them are the direct result of humans and their activities. We like to think of ourselves as the only intelligent species,but anyone looking over a list like this should immediately question just how smart we really are. It is not a question of compassion, a trait not all of us share. It is a question of survival, for if we callously allow ourselves to destroy species, there is no reason why our destructive behavior will not ultimately eliminate us too.