Collecting data on salmon fork length to find out the best habitat for summer chum salmon survival, and to aim for rebuilding salmon population in the Pacific North West
Changes in recreational shore angler attitudes towards and awareness of, line...MACE Lab
The document summarizes research comparing data on recreational shore anglers' knowledge, attitudes, and behaviors (KAB) regarding linefish management in KwaZulu-Natal, South Africa between 1996 and 2009. It found that while the demographics of anglers had changed, with fewer employed, support for regulations remained high but knowledge of regulations and compliance had decreased. Inspection rates by authorities also declined significantly over this period as management of the fishery weakened. The conclusion calls for improved compliance efforts, long-term research and data collection, and education programs to support effective fisheries management going forward.
This document summarizes a study on surf smelt (Hypomesus pretiosus) in Puget Sound. The study aimed to determine if surf smelt could be tagged without harm using visible implant elastomer tags, and if tagged smelt could then be recaptured in the wild. Over 10,000 smelt were tagged at two sites and recaptured over subsequent months. The results showed high tag retention and survival, and that individual smelt spawn repeatedly on different beaches within a region. The study provided new insights into surf smelt movements and spawning behavior.
Talk provided at the Institute of Fisheries Management (IFM) / Scottish Fisheries Co-ordination Centre (SFCC) workshop on scale reading, held at The Tweed Foundation, 26/03/2015.
Diamond Mining Impacts on Breeding Damara TernsJustine Braby
This presentation was given at the 8th Pan-African Ornitholigcal Congress in September 2008. The abstract reads as follows:
The Damara Tern (Sterna balaenarum) is a near-endemic, near-threatened seabird that breeds along the Namibian coastline. Its breeding range extends into the Sperrgebiet, a diamond mining area along the southern coast of Namibia about to be proclaimed as a National Park. A study is being conducted to investigate the potential impact of diamond mining on the breeding productivity of the Damara Tern at one mined locality, Elizabeth Bay, and three other nesting sites along the southern Namibian coastline. Diamond mining may impact the breeding productivity in several ways: habitat destruction, disturbance, and foraging efficiency due to sediment discharge. Parameters monitored are colony size, breeding success, chick growth and condition, and adult foraging success. Out of the four breeding sites monitored, Elizabeth Bay has the smallest number of nests. The number of nests has also decreased from 30 in 1979 (before mining), to 13 (during mining) in 2008. Nests were previously found in areas which have since been mined and are now unsuitable nesting habitats. The other non-mined sites were Marmora Pan (55 nests), Grossebucht (21 nests) and Hottentot’s Bay (80 nests). Breeding success and chick predation rates differ between sites. So far no differences in chick growth rates and adult foraging success could be established between mined and non-mined sites. Chick growth and condition, however seem to be dependent on the distance between colony and feeding sites.
The WWT Steart Marshes wetland project in the UK created over 500 hectares of new intertidal habitat to compensate for loss elsewhere, making it the largest wetland creation scheme in the country. Over a 5 year period from 2009-2014, the site underwent extensive construction including new flood banks, creeks, and embankments to develop over 300 hectares of saltmarsh and 150 hectares of freshwater wetlands. The site now provides important habitat for plants, migratory birds, and other wildlife while also serving as a natural flood defense and providing recreational access and educational opportunities for the local community.
This document summarizes research on the implications of Arkansas' no-jake turkey harvest policy. It discusses three key aspects of harvest policy: timing of the season opener, season length, and bag structure. A 2012 pilot study estimated jake turkey survival rates and recruitment into the 2-year-old age class in two regions of Arkansas. The results showed higher jake survival and 2-year-old recruitment in the Ozarks compared to the Gulf Coastal Plain. Based on these findings, the no-jake harvest policy appears to have different impacts depending on the region. The researcher then outlines plans for a Phase II study from 2015-2017 to further examine jake and gobbler survival rates, recruitment, and factors influencing
Changes in recreational shore angler attitudes towards and awareness of, line...MACE Lab
The document summarizes research comparing data on recreational shore anglers' knowledge, attitudes, and behaviors (KAB) regarding linefish management in KwaZulu-Natal, South Africa between 1996 and 2009. It found that while the demographics of anglers had changed, with fewer employed, support for regulations remained high but knowledge of regulations and compliance had decreased. Inspection rates by authorities also declined significantly over this period as management of the fishery weakened. The conclusion calls for improved compliance efforts, long-term research and data collection, and education programs to support effective fisheries management going forward.
This document summarizes a study on surf smelt (Hypomesus pretiosus) in Puget Sound. The study aimed to determine if surf smelt could be tagged without harm using visible implant elastomer tags, and if tagged smelt could then be recaptured in the wild. Over 10,000 smelt were tagged at two sites and recaptured over subsequent months. The results showed high tag retention and survival, and that individual smelt spawn repeatedly on different beaches within a region. The study provided new insights into surf smelt movements and spawning behavior.
Talk provided at the Institute of Fisheries Management (IFM) / Scottish Fisheries Co-ordination Centre (SFCC) workshop on scale reading, held at The Tweed Foundation, 26/03/2015.
Diamond Mining Impacts on Breeding Damara TernsJustine Braby
This presentation was given at the 8th Pan-African Ornitholigcal Congress in September 2008. The abstract reads as follows:
The Damara Tern (Sterna balaenarum) is a near-endemic, near-threatened seabird that breeds along the Namibian coastline. Its breeding range extends into the Sperrgebiet, a diamond mining area along the southern coast of Namibia about to be proclaimed as a National Park. A study is being conducted to investigate the potential impact of diamond mining on the breeding productivity of the Damara Tern at one mined locality, Elizabeth Bay, and three other nesting sites along the southern Namibian coastline. Diamond mining may impact the breeding productivity in several ways: habitat destruction, disturbance, and foraging efficiency due to sediment discharge. Parameters monitored are colony size, breeding success, chick growth and condition, and adult foraging success. Out of the four breeding sites monitored, Elizabeth Bay has the smallest number of nests. The number of nests has also decreased from 30 in 1979 (before mining), to 13 (during mining) in 2008. Nests were previously found in areas which have since been mined and are now unsuitable nesting habitats. The other non-mined sites were Marmora Pan (55 nests), Grossebucht (21 nests) and Hottentot’s Bay (80 nests). Breeding success and chick predation rates differ between sites. So far no differences in chick growth rates and adult foraging success could be established between mined and non-mined sites. Chick growth and condition, however seem to be dependent on the distance between colony and feeding sites.
The WWT Steart Marshes wetland project in the UK created over 500 hectares of new intertidal habitat to compensate for loss elsewhere, making it the largest wetland creation scheme in the country. Over a 5 year period from 2009-2014, the site underwent extensive construction including new flood banks, creeks, and embankments to develop over 300 hectares of saltmarsh and 150 hectares of freshwater wetlands. The site now provides important habitat for plants, migratory birds, and other wildlife while also serving as a natural flood defense and providing recreational access and educational opportunities for the local community.
This document summarizes research on the implications of Arkansas' no-jake turkey harvest policy. It discusses three key aspects of harvest policy: timing of the season opener, season length, and bag structure. A 2012 pilot study estimated jake turkey survival rates and recruitment into the 2-year-old age class in two regions of Arkansas. The results showed higher jake survival and 2-year-old recruitment in the Ozarks compared to the Gulf Coastal Plain. Based on these findings, the no-jake harvest policy appears to have different impacts depending on the region. The researcher then outlines plans for a Phase II study from 2015-2017 to further examine jake and gobbler survival rates, recruitment, and factors influencing
1. The document discusses a study analyzing the growth rates of ferox trout using scale analysis and the Von Bertalanffy growth function model.
2. Significant differences were found between sympatric ferox trout and brown trout populations in Loch Awe and Loch Rannoch for certain growth parameters.
3. While scale analysis provides a non-lethal method, there are limitations to its accuracy which the study acknowledges, though it maintains scales are still preferable to otoliths for analyzing rare ferox trout.
The presentation summarized the 20-year history and accomplishments of the Washington County Habitat Conservation Plan (HCP) in protecting the Mojave desert tortoise population. Key points included that tortoise population estimates within the Red Cliffs Desert Reserve declined 26.6% between 1999-2011 surveys, though less steeply than other recovery units. The HCP has translocated over 500 tortoises and spent over $10 million on conservation efforts like fencing, monitoring, education, and land acquisition. Renewal of the HCP is needed to continue protecting this important tortoise habitat in Washington County into the future.
Peter Phippen Sandy Update - November 2015greenbelt82
This document summarizes efforts to enhance coastal resiliency in the Great Marsh ecosystem in Massachusetts through community planning, hydrological assessments, modeling of sediment transport and salinity, ecological restoration of dunes and salt marshes, eelgrass restoration, and engaging youth. The project aims to reduce vulnerability of coastal communities and infrastructure to sea level rise, storms and flooding by strengthening natural ecosystems. Key activities include developing adaptation plans with communities, assessing and prioritizing stream crossings, collecting field data to model sediment and salinity impacts, restoring dunes and removing invasive plants to replant native vegetation, transplanting eelgrass, and monitoring green crabs and marsh edge erosion.
The document summarizes a study that developed a systems dynamics model to examine the interactions between cockle fishing, sediment characteristics, and cockle biomass in the Wadden Sea. The model analyzed how fishing rates, sediment silt content, and bird predation impact cockle populations. The results showed that fishing fewer than 45 boats and maintaining over 0.5% sediment silt content prevents cockle stock collapse. The document provides background on the study area and species, describes the conceptual model, parameter values, and Stella model developed.
The document summarizes coastal storm damage observations and reporting around the Great Marsh area from 2013-2015. It provides examples of different types of storm damage photos uploaded to an online storm reporting system, including flooded homes, overwash of dunes and seawalls, beach and dune erosion, and washed out roads. The summary explains that storm reports are used for emergency response, weather forecasts, planning and project review, and scientific studies. It emphasizes that people should only report storm damage when safe to do so.
The document summarizes the Urban Assembly New York Harbor School's oyster restoration and research project. It details the school's history with oyster restoration since 2003, including building floating upweller systems and reefs holding hundreds of thousands of oysters. It describes the school's remote setting process which resulted in over 2 million oysters, and its nursery and growout activities. It also outlines the design of constructed reefs, monitoring techniques, and diving protocols developed to safely deploy and monitor oysters in New York Harbor.
This document discusses river basin management planning in the Severn Estuary region. It provides an overview of the current status of water bodies, noting that 40% have achieved good status with the objectives to increase that to 57% by 2021 and beyond. Partnership working through a catchment based approach is key to planning. River basin planning encourages shared decision making and delivery between partners. The document outlines the river basin planning timetable and lists resources for further information.
The influence of estuarine habitats on the expression of life history of char...KBay Council
This document summarizes a research project studying how estuarine habitats influence the expression of life history traits in smolting coho salmon. The project has two parts: 1) comparing smolt traits within one estuary under different environmental conditions, and 2) comparing adult salmon traits that returned to two different estuarine systems. The goals are to see if estuary habitats select for certain salmon traits and contribute to resilience against environmental change. So far, pilot studies in 2009 helped develop sampling methods and collect baseline data on species composition in the two estuaries. The project will continue in 2010-2011 by further examining smolt and adult salmon traits between the estuarine systems.
This document provides an introduction to basic bioeconomic analysis and game theoretic applications for studying shared fish stocks. It summarizes a basic bioeconomic model of fishing that involves both the natural and human components of a fishery. Overfishing, overcapacity, and low or negative profits are classical management problems that can be predicted using bioeconomic models that consider both catch per unit effort and fishing mortality over time. The document outlines a Gordon-Schaefer bioeconomic model and describes how open access can lead to overfishing and zero economic rents. It also discusses potential solutions to these issues such as total allowable catches, limited entry, and individualized quotas.
A network for bottlenose dolphin photo-ID monitoring along the French Mediter...Olivier GIMENEZ
The document summarizes a collaborative project called GDEGeM that monitored bottlenose dolphins along the French Mediterranean coast through photo identification. Over two years of monitoring, researchers photographed and identified over 800 individual dolphins in the Gulf of Lion, 260 in Provence, and 167 in Corsica. Capture-recapture analysis estimated abundances of 655 dolphins in the Gulf of Lion, 91 in Provence, and 149 in Corsica, for a total abundance of 895 dolphins. The project demonstrated the value of long-term monitoring for informing dolphin conservation in the region's network of marine protected areas.
TESTING THE LOW OCTANE DIET TO KEEP LUMPFISH SMALL: AQUACULTURE EUROPE 2017: Sara Barrento
ORAL PRESENTATION AQUACULTURE EUROPE 2017
The lumpfish (Cyclopterus lumpus) is a novel aquaculture species. Unknown to most consumers – the watery gelatinous flesh is only appreciated in Nordic countries. Lumpfish are also effective cleaner fish which prey on the ectoparasite copepods - Lepeophtherius salmonis, commonly known as sea-lice (Powell et al., 2017).
Until recently, the only option for delousing was using medicines but sea-lice developed resistance and there are very few compounds licensed for use. Having lumpfish in the salmon cages eating the sea-lice has become an attractive and environmentally friendly alternative (Imsland et al. 2014).
For most farmed fish, the main goal is to grow fish fast and with a high Feed Conversion Rate, because the end product is fish biomass. But the purpose of using lumpfish in aquaculture is to delouse salmon. So, lumpfish are traded not in weight. but in number of individuals of a specific size – around 11 g - if they are too big they become ineffective at delousing salmon. So, the challenge is to stop lumpfish growing too quickly, but without compromising their welfare.
In this study, we compared the growth performance and welfare of lumpfish fed two commercial diets. One of the diets, is currently marketed as” low octane” formula with reduced protein/fat levels for controlled post vaccination.
OCEAN: Modeling the linkages between marine ecology, fishing economy and coas...Ecotrust
This document summarizes the OCEAN model developed by Ecotrust to analyze linkages between marine ecology, fishing economies, and coastal communities. The model uses GIS to combine data from multiple sources on species distributions, fishing activity, habitats, and communities. It has been applied to issues like the groundfish crisis on the west coast to assess the impacts of fishery closures and aim to balance ecology, economy, and equity. The model provides a way to understand how changes in the ocean affect coastal communities to help with marine management and policy decisions.
This document summarizes an agent-based model of Atlantic salmon migration in Scottish coastal waters. The model uses data on salmon movements to simulate individual salmon searching for their home rivers along the coast. Initial results show the model can replicate some patterns from historical tagging studies. Further refinement is needed by incorporating more accurate estimates of river productivity and fishing effort data to improve matching with real data patterns. The next steps aim to test the model under different scenarios to better understand salmon migration behaviors.
Researchers compared the growth, body condition, and survival of juvenile muskellunge reared in ponds with and without added structural habitat. They found that muskellunge reared in ponds with added structures like PVC pipes had greater growth, higher body condition, and higher relative survival compared to those reared in ponds without structures. While results were preliminary and from a single year of study with limited replication, the findings suggest adding structural habitat can benefit muskellunge production goals in hatchery settings by increasing growth, survival, and overall production. The study will continue for several years to obtain more data and detailed statistical analysis.
INTEGRATING SEAWEEED AQUACULTURE TO THE THIRD BIGGEST PORT IN THE UK: AQUACUL...Sara Barrento
This document discusses integrating seaweed aquaculture into the Port of Milford Haven in Wales, which is the third largest port in the UK. It describes how seaweed farms can be used to produce biomass, remove nutrients from water, and provide ecosystem services. The document outlines experiments conducted at a seaweed farm in Milford Haven to measure drift seaweed, litter collection, and the ability of seaweed barriers to reduce underwater sound levels. It acknowledges contributions from other researchers and thanks those who aided in data collection and providing lab facilities.
Promoting oyster aquaculture in Ghana: Strategies for optimising seed collect...Ernest Chuku
A presentation on the procurement of wild seed (spat) of the mangrove oyster, Crassostrea tulipa, in coastal water bodies along the coast of Ghana, West Africa. The slide covers spatial and temporal variations in spatfall in the Densu Delta, Narkwa Lagoon, Benya Lagoon and Whin Estuary from November 2017 to October 2018. A comparison of the effectiveness of locally available spat collectors is also presented. The slide contains information on typical fouling organisms in oyster farming in the tropics. Growth rates of oysters are also compared among the different water bodies and on different collectors.
Dep head of bay oyster project jam bay task force fall 2017 updateecowatchers
This project aims to establish a self-sustaining oyster population in Jamaica Bay through the creation of oyster "donor" and "receiving" beds. The donor system contains over 30,000 adult and 400,000 juvenile oysters that are reproducing and releasing larvae. Four receiving reefs were constructed and preliminary surveys found them intact with low algae. So far no oyster spat has been detected on collectors. Benthic trays and water quality sampling are also being used to study the habitat and water filtration benefits of the oysters.
NYC Dep oyster reef update regarding head of bay oyster projectecowatchers
This document provides an update on the DEP Oyster Research and Restoration Project in Jamaica Bay. The project aims to evaluate factors affecting native oyster growth and survival, assess ecosystem services from oyster restoration like water quality benefits and habitat use, and understand oyster recruitment to establish a self-sustaining population. A donor system with adult oysters releases larvae into the water column. Receiver reef beds were constructed and monitored, but no oyster spat has been detected yet on spat collectors. Diver surveys and plankton tows were conducted to monitor the project.
Letter to City of Toronto requesting sewage spill cleanup - August 2018LOWaterkeeper
The average rainfall for the entire month of August landed on Toronto in a single 24-hour period on August 7, 2018. Heavy rainfall is known to cause sewage spills on the Toronto waterfront, so the Swim Drink Fish Monitoring Team went to Harbourfront on the morning of August 8, 2018. They found evidence of a major sewage spill that poses a threat to public and environmental health. This letter to the City of Toronto requests immediate cleanup of the sewage debris.
Environmental Health and Safety Survey Vanier Park 2019LOWaterkeeper
This document summarizes an environmental health and safety survey of Vanier Park in Vancouver, BC. It identifies the park and swimming area, describes surrounding land uses and potential sources of contamination. Microbiological testing over 2019 found the water passed guidelines 90% of the time. Sources of contamination include nearby boats, stormwater runoff and wildlife. Physical hazards include strong currents, rocks and seaweed. The document assesses risks and considers mitigation barriers.
This project examined how beach sand composition and tide levels affect the size and age distribution of butter clams. Samples were taken from beaches with varying elevations and sieved to determine sand composition. Statistical analysis found significant differences in clam age and size based on tide level, but not sand composition. The oldest clams were found at higher tide levels, while the youngest were at extreme high and low levels. This data on clam habitat requirements can inform sustainable harvest and farming strategies.
1. The document discusses a study analyzing the growth rates of ferox trout using scale analysis and the Von Bertalanffy growth function model.
2. Significant differences were found between sympatric ferox trout and brown trout populations in Loch Awe and Loch Rannoch for certain growth parameters.
3. While scale analysis provides a non-lethal method, there are limitations to its accuracy which the study acknowledges, though it maintains scales are still preferable to otoliths for analyzing rare ferox trout.
The presentation summarized the 20-year history and accomplishments of the Washington County Habitat Conservation Plan (HCP) in protecting the Mojave desert tortoise population. Key points included that tortoise population estimates within the Red Cliffs Desert Reserve declined 26.6% between 1999-2011 surveys, though less steeply than other recovery units. The HCP has translocated over 500 tortoises and spent over $10 million on conservation efforts like fencing, monitoring, education, and land acquisition. Renewal of the HCP is needed to continue protecting this important tortoise habitat in Washington County into the future.
Peter Phippen Sandy Update - November 2015greenbelt82
This document summarizes efforts to enhance coastal resiliency in the Great Marsh ecosystem in Massachusetts through community planning, hydrological assessments, modeling of sediment transport and salinity, ecological restoration of dunes and salt marshes, eelgrass restoration, and engaging youth. The project aims to reduce vulnerability of coastal communities and infrastructure to sea level rise, storms and flooding by strengthening natural ecosystems. Key activities include developing adaptation plans with communities, assessing and prioritizing stream crossings, collecting field data to model sediment and salinity impacts, restoring dunes and removing invasive plants to replant native vegetation, transplanting eelgrass, and monitoring green crabs and marsh edge erosion.
The document summarizes a study that developed a systems dynamics model to examine the interactions between cockle fishing, sediment characteristics, and cockle biomass in the Wadden Sea. The model analyzed how fishing rates, sediment silt content, and bird predation impact cockle populations. The results showed that fishing fewer than 45 boats and maintaining over 0.5% sediment silt content prevents cockle stock collapse. The document provides background on the study area and species, describes the conceptual model, parameter values, and Stella model developed.
The document summarizes coastal storm damage observations and reporting around the Great Marsh area from 2013-2015. It provides examples of different types of storm damage photos uploaded to an online storm reporting system, including flooded homes, overwash of dunes and seawalls, beach and dune erosion, and washed out roads. The summary explains that storm reports are used for emergency response, weather forecasts, planning and project review, and scientific studies. It emphasizes that people should only report storm damage when safe to do so.
The document summarizes the Urban Assembly New York Harbor School's oyster restoration and research project. It details the school's history with oyster restoration since 2003, including building floating upweller systems and reefs holding hundreds of thousands of oysters. It describes the school's remote setting process which resulted in over 2 million oysters, and its nursery and growout activities. It also outlines the design of constructed reefs, monitoring techniques, and diving protocols developed to safely deploy and monitor oysters in New York Harbor.
This document discusses river basin management planning in the Severn Estuary region. It provides an overview of the current status of water bodies, noting that 40% have achieved good status with the objectives to increase that to 57% by 2021 and beyond. Partnership working through a catchment based approach is key to planning. River basin planning encourages shared decision making and delivery between partners. The document outlines the river basin planning timetable and lists resources for further information.
The influence of estuarine habitats on the expression of life history of char...KBay Council
This document summarizes a research project studying how estuarine habitats influence the expression of life history traits in smolting coho salmon. The project has two parts: 1) comparing smolt traits within one estuary under different environmental conditions, and 2) comparing adult salmon traits that returned to two different estuarine systems. The goals are to see if estuary habitats select for certain salmon traits and contribute to resilience against environmental change. So far, pilot studies in 2009 helped develop sampling methods and collect baseline data on species composition in the two estuaries. The project will continue in 2010-2011 by further examining smolt and adult salmon traits between the estuarine systems.
This document provides an introduction to basic bioeconomic analysis and game theoretic applications for studying shared fish stocks. It summarizes a basic bioeconomic model of fishing that involves both the natural and human components of a fishery. Overfishing, overcapacity, and low or negative profits are classical management problems that can be predicted using bioeconomic models that consider both catch per unit effort and fishing mortality over time. The document outlines a Gordon-Schaefer bioeconomic model and describes how open access can lead to overfishing and zero economic rents. It also discusses potential solutions to these issues such as total allowable catches, limited entry, and individualized quotas.
A network for bottlenose dolphin photo-ID monitoring along the French Mediter...Olivier GIMENEZ
The document summarizes a collaborative project called GDEGeM that monitored bottlenose dolphins along the French Mediterranean coast through photo identification. Over two years of monitoring, researchers photographed and identified over 800 individual dolphins in the Gulf of Lion, 260 in Provence, and 167 in Corsica. Capture-recapture analysis estimated abundances of 655 dolphins in the Gulf of Lion, 91 in Provence, and 149 in Corsica, for a total abundance of 895 dolphins. The project demonstrated the value of long-term monitoring for informing dolphin conservation in the region's network of marine protected areas.
TESTING THE LOW OCTANE DIET TO KEEP LUMPFISH SMALL: AQUACULTURE EUROPE 2017: Sara Barrento
ORAL PRESENTATION AQUACULTURE EUROPE 2017
The lumpfish (Cyclopterus lumpus) is a novel aquaculture species. Unknown to most consumers – the watery gelatinous flesh is only appreciated in Nordic countries. Lumpfish are also effective cleaner fish which prey on the ectoparasite copepods - Lepeophtherius salmonis, commonly known as sea-lice (Powell et al., 2017).
Until recently, the only option for delousing was using medicines but sea-lice developed resistance and there are very few compounds licensed for use. Having lumpfish in the salmon cages eating the sea-lice has become an attractive and environmentally friendly alternative (Imsland et al. 2014).
For most farmed fish, the main goal is to grow fish fast and with a high Feed Conversion Rate, because the end product is fish biomass. But the purpose of using lumpfish in aquaculture is to delouse salmon. So, lumpfish are traded not in weight. but in number of individuals of a specific size – around 11 g - if they are too big they become ineffective at delousing salmon. So, the challenge is to stop lumpfish growing too quickly, but without compromising their welfare.
In this study, we compared the growth performance and welfare of lumpfish fed two commercial diets. One of the diets, is currently marketed as” low octane” formula with reduced protein/fat levels for controlled post vaccination.
OCEAN: Modeling the linkages between marine ecology, fishing economy and coas...Ecotrust
This document summarizes the OCEAN model developed by Ecotrust to analyze linkages between marine ecology, fishing economies, and coastal communities. The model uses GIS to combine data from multiple sources on species distributions, fishing activity, habitats, and communities. It has been applied to issues like the groundfish crisis on the west coast to assess the impacts of fishery closures and aim to balance ecology, economy, and equity. The model provides a way to understand how changes in the ocean affect coastal communities to help with marine management and policy decisions.
This document summarizes an agent-based model of Atlantic salmon migration in Scottish coastal waters. The model uses data on salmon movements to simulate individual salmon searching for their home rivers along the coast. Initial results show the model can replicate some patterns from historical tagging studies. Further refinement is needed by incorporating more accurate estimates of river productivity and fishing effort data to improve matching with real data patterns. The next steps aim to test the model under different scenarios to better understand salmon migration behaviors.
Researchers compared the growth, body condition, and survival of juvenile muskellunge reared in ponds with and without added structural habitat. They found that muskellunge reared in ponds with added structures like PVC pipes had greater growth, higher body condition, and higher relative survival compared to those reared in ponds without structures. While results were preliminary and from a single year of study with limited replication, the findings suggest adding structural habitat can benefit muskellunge production goals in hatchery settings by increasing growth, survival, and overall production. The study will continue for several years to obtain more data and detailed statistical analysis.
INTEGRATING SEAWEEED AQUACULTURE TO THE THIRD BIGGEST PORT IN THE UK: AQUACUL...Sara Barrento
This document discusses integrating seaweed aquaculture into the Port of Milford Haven in Wales, which is the third largest port in the UK. It describes how seaweed farms can be used to produce biomass, remove nutrients from water, and provide ecosystem services. The document outlines experiments conducted at a seaweed farm in Milford Haven to measure drift seaweed, litter collection, and the ability of seaweed barriers to reduce underwater sound levels. It acknowledges contributions from other researchers and thanks those who aided in data collection and providing lab facilities.
Promoting oyster aquaculture in Ghana: Strategies for optimising seed collect...Ernest Chuku
A presentation on the procurement of wild seed (spat) of the mangrove oyster, Crassostrea tulipa, in coastal water bodies along the coast of Ghana, West Africa. The slide covers spatial and temporal variations in spatfall in the Densu Delta, Narkwa Lagoon, Benya Lagoon and Whin Estuary from November 2017 to October 2018. A comparison of the effectiveness of locally available spat collectors is also presented. The slide contains information on typical fouling organisms in oyster farming in the tropics. Growth rates of oysters are also compared among the different water bodies and on different collectors.
Dep head of bay oyster project jam bay task force fall 2017 updateecowatchers
This project aims to establish a self-sustaining oyster population in Jamaica Bay through the creation of oyster "donor" and "receiving" beds. The donor system contains over 30,000 adult and 400,000 juvenile oysters that are reproducing and releasing larvae. Four receiving reefs were constructed and preliminary surveys found them intact with low algae. So far no oyster spat has been detected on collectors. Benthic trays and water quality sampling are also being used to study the habitat and water filtration benefits of the oysters.
NYC Dep oyster reef update regarding head of bay oyster projectecowatchers
This document provides an update on the DEP Oyster Research and Restoration Project in Jamaica Bay. The project aims to evaluate factors affecting native oyster growth and survival, assess ecosystem services from oyster restoration like water quality benefits and habitat use, and understand oyster recruitment to establish a self-sustaining population. A donor system with adult oysters releases larvae into the water column. Receiver reef beds were constructed and monitored, but no oyster spat has been detected yet on spat collectors. Diver surveys and plankton tows were conducted to monitor the project.
Letter to City of Toronto requesting sewage spill cleanup - August 2018LOWaterkeeper
The average rainfall for the entire month of August landed on Toronto in a single 24-hour period on August 7, 2018. Heavy rainfall is known to cause sewage spills on the Toronto waterfront, so the Swim Drink Fish Monitoring Team went to Harbourfront on the morning of August 8, 2018. They found evidence of a major sewage spill that poses a threat to public and environmental health. This letter to the City of Toronto requests immediate cleanup of the sewage debris.
Environmental Health and Safety Survey Vanier Park 2019LOWaterkeeper
This document summarizes an environmental health and safety survey of Vanier Park in Vancouver, BC. It identifies the park and swimming area, describes surrounding land uses and potential sources of contamination. Microbiological testing over 2019 found the water passed guidelines 90% of the time. Sources of contamination include nearby boats, stormwater runoff and wildlife. Physical hazards include strong currents, rocks and seaweed. The document assesses risks and considers mitigation barriers.
This project examined how beach sand composition and tide levels affect the size and age distribution of butter clams. Samples were taken from beaches with varying elevations and sieved to determine sand composition. Statistical analysis found significant differences in clam age and size based on tide level, but not sand composition. The oldest clams were found at higher tide levels, while the youngest were at extreme high and low levels. This data on clam habitat requirements can inform sustainable harvest and farming strategies.
Volunteer boaters will participate in removing derelict crab traps from six Tampa Bay locations on July 11 due to a regional closure of the blue crab fishery from July 10-19. The closure is mandated by the Florida Fish and Wildlife Conservation Commission to help remove abandoned traps that continue to catch crabs and other species, posing risks to wildlife and navigation. Tampa Bay Watch has removed over 1,400 traps through previous cleanup efforts and estimates thousands more remain, so the event aims to further preserve the bay by removing debris and protecting marine life.
IT REPORT-2012 (RYAN IVARAMI-DFMR YEAR 3)Ryan Ivarami
This document summarizes a study on the spawning periods of sea cucumbers in Kavieng, New Ireland Province, Papua New Guinea. It describes the construction of an observation pen and stocking it with various sea cucumber species. Over two periods, data was collected on the circumference, length, and spawning behaviors of the sea cucumbers. Analysis included calculating mean sizes, percentages of species compositions, and charts. Observations found signs of spawning but more time was needed to fully achieve the objectives due to limitations of time and funding for the study.
Pacific Spirit Park Society (PSPS) Environmental Health and Safety SurveyLOWaterkeeper
Water quality at this beach jointly monitored by Metro Vancouver and the Pacific Spirit Park Society (PSPS). Sampling is conducted by Metro Vancouver from May to October and by the Pacific Spirit Park Society from October to March.
The study characterized sediment and measured seawater temperatures along the Delmarva Peninsula to identify optimal habitats for reseeding the economically important soft shell clam, Mya arenaria, whose populations are declining due to rising temperatures. Sediment samples from different sites and depths were analyzed for grain size and organic/inorganic content. Queens Sound and Greenbackville provided the most favorable conditions with opposing ratios of silt/clay to organic matter. Winter months saw higher silt/clay levels. Seawater temperatures in the Northeast were significantly lower than along the Eastern Shore from May to October, exceeding Mya arenaria's tolerance. Rising temperatures are forcing the species northward.
OPPURTUNITIES AND LIMITATIONS FOR POP-UP SATELLITE TAGS IN FRESH WATER ENVIRO...DesertStarSystems
Marco and Jacob discuss how pop-off satellite tags can give fresh water researchers insight like never before. Using the SeaTag line, Marco and Jacob delve into current studies demonstrating the limitations and opportunities afforded by the robust, easy to use, and insightful SeaTags.
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Environmental capstone final presentation
1. Endangered “Summer Chum”: Finding Optimum Habitat
@hualianxu1995
y = 0.7227x + 37.982
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ForkLength
dates of the sampling
Barrier beach
y = 0.2x + 41.118
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ForkLength
dates of the sampling
Pocket estuary
y = 0.8864x + 35.864
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ForkLength
dates of the sampling
Pocket estuary
y = 0.1955x + 38.464
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60
ForkLength
dates of the sampling
Delta
y = 0.3773x + 37.1
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ForkLength
dates of the sampling
Delta
y = 0.7045x + 36.909
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ForkLength
dates of the sampling
Bluff backed beach
y = 0.9318x + 35
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ForkLength
dates of the sampling
Bluff backed beach
y = 1.0045x + 38.109
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ForkLength
dates of the sampling
Barrier beach
Hualian Xu *
Program on the Environment
University of Washington
Faculty Advisor:
Professor John Horne
School of Aquatic and Fisheries Sciences at
University of Washington
Site Supervisor:
Aaron Jorgenson
Wild Fish Conservancy
Background
Hood Canal summer chum salmon was listed as threatened under the
Endangered Species Act in 1999. Recovery planning and implementation were
underway prior to the listing, with harvest reductions and hatchery programs
enacted in the early 1990’s. Population abundance reductions were linked to
habitat loss due to climate change. We need to know what habitat is best for
growth and survival.
Research Question
Figure 1. We
are netting
salmon at a
bluff backed
beach (in the
snow and cold)
for salmon data
collection in
February 2018
Ⓒ Wild Fish
Conservancy
METHODS
Supplement data collections to extend the 2 year database.
Sampled 56 sites and categorized sites into 4 habitats: Pocket estuary,
Delta, Bluff backed beach, Barrier beach.
Internship responsibilities included field work at Hood Canal, data
processing and analysis, and produce research products.
During 2018, use beach seine to catch and release summer chum salmon
(see Fig. 1), record fork length of the first 40 fish, measure water
temperature, tide height, salinity, sample time, and catch composition.
Analyze length data from 2016-17 (2018 data have not been entered into
the database). Filtered winter chum salmon (by date), created boxplots of
length samples, regressed fork length (mm) with day of year to estimate
growth rates (mm week-1)
Figure 2.
Sample of
identified
Summer Chum
salmon from
beach seine
catch ready for
length
measurements.
2018 Ⓒ Wild
Fish
Conservancy
Results
Delta (0.25 mm week-1) and pocket estuary (0.5 mm week-1) habitats
have the lowest average growth rate within 2016 and 2017.
Growth rate of summer chums at four different habitat
2016 2017
Figure 3. Average fork lengths of summer chum salmon at four habitat types from
the Wild Fish Conservancy project from early January to mid-March 2016 - 2017.
Red lines represent average weekly growth rate of the fish at each habitat.
Significance
This internship addresses the environmental problem of climate
change that is intensifying habitat loss and species extinction due to
loss of habitat and reduction in species numbers, which potentially
increases the risk of extinction.
Added value of this data is that they can be used for many other salmon
research projects because the data includes environmental variables
(e.g. temperature, salinity, tide height).
Figure 4. This is a
picture of me
holding a 60+ mm
Coho to take
pictures for
recording data at
one of the estuary
sites on
February 2018 Ⓒ
Wild Fish
Conservancy
Acknowledgements
I like to thank John Horne for being an incredible Faculty Advisor and
Aaron Jorgenson for helping throughout the project and being my site
supervisor, my family supporting my work and understanding me, and P.
Sean McDonald to give me ideas and check in with my work.
Figure 5.
Examples of
the four
habitat types
used to
classify
beaches.
2018 Ⓒ Wild
Fish
Conservancy
Are there differences in juvenile summer chum salmon growth rates among
different habitats?
Based on highest growth rate, barrier beach habitat should have the
highest priority for restoration
Bluff backed beach (0.8 mm week-1) and barrier beach (0.85 mm week-1)
habitats have a highest growth rate average within 2016 and 2017.
A future step for this research might be to inventory barrier beach
habitat in Puget Sound and potentially create additional barrier beach
habitat at other locations without disturbing other resident species.
Additional monitoring efforts are needed to ensure summer chum
salmon use and increased growth.
Pocket Estuary
Barrier Beach
Delta
Bluff Backed Beach