scholarly journals Sea turtle bycatch by different types of fisheries in southern Spain

2020 ◽  
Author(s):  
Adolfo Marco ◽  
Cristina Vázquez ◽  
Elena Abella-Pérez
Keyword(s):  
Sea Turtles ◽  
Sea Turtle ◽  
High Impact ◽  
Southern Spain ◽  
Small Scale ◽  
Leatherback Turtles ◽  
Small Scale Fisheries ◽  
Different Types ◽  
The Impact ◽  
Feeding Grounds

The bycatch of sea turtles by industrial fisheries is receiving an increasing attention in recent years due to the high impact it causes on these endangered species. This issue was evaluated in southern Spain waters that harbors an important feeding ground of loggerhead and leatherback turtles, including the endangered Eastern Atlantic loggerhead population. To quantify the impact that different fisheries represents to sea turtles, 272 fishermen answered to detailed illustrated questionnaires in all the main ports of Andalusia and Murcia (Spain) during 2014. This study has updated the knowledge of turtle bycatch in the southwestern Mediterranean revealing a widespread impact of fisheries on sea turtles. Fishermen recognized an annual catch of 2.3 turtles per boat. Considering the census of industrial fishing boats in the study area (1182), more than 2840 sea turtles could be bycaught per year in the study area. Most of captures (96.2%) were produced during the summer. These results suggest a severe impact of most of legal fisheries (surface longline, pursue seine, trawling and small scale fisheries) on loggerhead feeding grounds in the southwestern Mediterranean. Fishermen suggests that drift fishing conducted by foreign or illegal fishermen and almadrabas are also causing a significant bycatch of turtles. Several measures such as reviewing compliance of current fishing and environmental regulations, modifying turtle technics to reduce turtle bycatch, facilitating the rescue and handle of wound turtles and their transport to the port for recovery, and recognizing the efforts of anglers to perform a more sustainable fishing, are recommended to mitigate this impact.

scholarly journals A Mitigation Hierarchy Approach for Managing Sea Turtle Captures in Small-Scale Fisheries

2020 ◽  
Vol 7 ◽  
Author(s):  
William N. S. Arlidge ◽  
Dale Squires ◽  
Joanna Alfaro-Shigueto ◽  
Hollie Booth ◽  
Jeffrey C. Mangel ◽  
...  
Keyword(s):  
Sea Turtle ◽  
Small Scale ◽  
Small Scale Fisheries ◽  
Mitigation Hierarchy

scholarly journals An Examination of an Opportunity for Collaboration Among Stakeholders to Promote Conservation in Sea Turtle Tourism in Gilli Trawangan, Indonesia

2021 ◽  
Author(s):  
Allison Anne McCabe
Keyword(s):  
Sea Turtles ◽  
Sustainable Tourism ◽  
Tourism Development ◽  
Sea Turtle ◽  
Small Island ◽  
Small Islands ◽  
Stakeholder Collaboration ◽  
Turtle Conservation ◽  
Sea Turtle Conservation ◽  
The Impact

All species of sea turtles are globally endangered, largely due to the impact of unsustainable tourism. Gili Trawangan, a small island, depends on marine tourism and has an abundant population of sea turtles. Stakeholder collaboration is often used to promote sustainable tourism development and sea turtle conservation. This study examined stakeholder collaboration to promote conservation in sea turtle tourism in small islands by exploring a case study in Gili Trawangan, Indonesia. The study was conducted in 2010. It applied qualitative research methods to expand the knowledge of collaboration in the development of sustainable tourism in small islands. Stakeholder analysis helped to reveal barriers to and influences on tourism development to help promote sea turtle conservation and protect the livelihoods of local communities. Key findings are that education, financial considerations, management structure, regulatory conflict, a disconnect to the island, and stakeholder conflict are factors that influenced stakeholder collaboration in Gili Trawangan.

scholarly journals Population dynamic between vulnerable coastal jaguars (Panthera onca) and endangered green sea turtles (Chelonia mydas) in Tortuguero National Park, Costa Rica.

2018 ◽  
Author(s):  
Stephanie Butera ◽  
Jaime Restrepo
Keyword(s):  
National Park ◽  
Sea Turtles ◽  
Chelonia Mydas ◽  
Sea Turtle ◽  
Predator Prey ◽  
Green Sea Turtles ◽  
Turtle Population ◽  
Nest Depredation ◽  
The Impact ◽  
Nest Predators

New-born sea turtles face a number of predators between the time the mothers lay eggs on the beach to when the hatchlings grow into larger juveniles. Nest depredation impacts reproductive success of nesting sea turtles, reducing the number of new turtles that make it to the sea. On Tortuguero beach nest predators include; dogs, coati, and raccoons. Nest depredation within Tortuguero National Park (TNP) has decreased dramatically since 1979. This decrease in nest depredation is linked to the increased jaguar population within TNP as the aforementioned species are considered the jaguars natural prey. Although jaguars prey on nesting turtles, they also control the populations of nest predators. Even more, jaguars have been demonstrated to change their behaviour to suit their preference in prey species therefore the nest predator distribution in TNP was examined to investigate whether changes in jaguar prey preference had an effect. Nest predation and the number of adult turtles lost to jaguar depredation were examined to determine the significance of the threat jaguars pose to the sea turtle population. This study investigates the predator prey relationship between jaguars, nest predators, and nesting female sea turtles; aiming to assessing the impact that jaguars have on the turtle's population.

scholarly journals Sustainable Waste Management Practices of Food Processing Units

2020 ◽  
Author(s):  
Rejani Nair
Keyword(s):  
Waste Management ◽  
Food Waste ◽  
Food Processing ◽  
Management Practices ◽  
Small Scale ◽  
General View ◽  
Standard Management ◽  
Different Types ◽  
Waste Management Practices ◽  
The Impact

<p><i>Food waste and its accumulation are becoming a critical problem. </i><i>In this context, this paper takes a look at the general view with the aim of achieving a better understanding of the different types of food waste, and tries to ponder on</i><i> the required steps or standard management practices should be taken to reduce the impact of food waste burden. The study has tried to analyse the waste management practices, cost of waste management practices etc. in small scale food processing units.</i><i></i></p>

scholarly journals Reducing green turtle bycatch in small-scale fisheries using illuminated gillnets: the cost of saving a sea turtle

2016 ◽  
Vol 545 ◽  
pp. 251-259 ◽  
Author(s):  
N Ortiz ◽  
JC Mangel ◽  
J Wang ◽  
J Alfaro-Shigueto ◽  
S Pingo ◽  
...  
Keyword(s):  
Green Turtle ◽  
Sea Turtle ◽  
Small Scale ◽  
Small Scale Fisheries ◽  
The Cost

scholarly journals Quantifying Illegal Extraction of Sea Turtles in Costa Rica

2021 ◽  
Vol 2 ◽  
Author(s):  
Helen Pheasey ◽  
George Glen ◽  
Nicole L. Allison ◽  
Luis G. Fonseca ◽  
Didiher Chacón ◽  
...  
Keyword(s):  
Costa Rica ◽  
Sea Turtles ◽  
Chelonia Mydas ◽  
Sea Turtle ◽  
Wildlife Trade ◽  
Caribbean Coast ◽  
Turtle Species ◽  
Illegal Wildlife Trade ◽  
The Caribbean ◽  
The Impact

Estimates of illegal wildlife trade vary significantly and are often based on incomplete datasets, inferences from CITES permits or customs seizures. As a result, annual global estimates of illegal wildlife trade can vary by several billions of US dollars. Translating these figures into species extraction rates is equally challenging, and estimating illegal take accurately is not achievable for many species. Due to their nesting strategies that allow for census data collection, sea turtles offer an exception. On the Caribbean coast of Costa Rica, three sea turtle species (leatherback, Dermochelys coriacea; green, Chelonia mydas; and hawksbill, Eretmochelys imbricata) are exploited by poachers. Despite the consumption of turtle eggs and meat being illegal, they are consumed as a cultural food source and seasonal treat. Conservation programmes monitor nesting beaches, collect abundance data and record poaching events. Despite the availability of robust long-term datasets, quantifying the rate of poaching has yet to be undertaken. Using data from the globally important nesting beach, Tortuguero, as well as beaches Playa Norte and Pacuare on the Caribbean coast of Costa Rica, we modelled the spatial and temporal distribution of poaching of the three sea turtle species. Here, we present data from 2006 to 2019 on a stretch of coastline covering c.37 km. We identified poaching hotspots that correlated with populated areas. While the poaching hotspots persisted over time, we found poaching is declining at each of our sites. However, we urge caution when interpreting this result as the impact of poaching varies between species. Given their low abundance on these beaches, the poaching pressure on leatherback and hawksbill turtles is far greater than the impact on the abundant green turtles. We attribute the decline in poaching to supply-side conservation interventions in place at these beaches. Finally, we highlight the value of data sharing and collaborations between conservation NGOs.

scholarly journals Chelonid Alphaherpesvirus 5 Prevalence and First Confirmed Case of Sea Turtle Fibropapillomatosis in Grenada, West Indies

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1490
Author(s):  
Amanda James ◽  
Annie Page-Karjian ◽  
Kate E. Charles ◽  
Jonnel Edwards ◽  
Christopher R. Gregory ◽  
...  
Keyword(s):  
West Indies ◽  
Sea Turtles ◽  
Chelonia Mydas ◽  
Sea Turtle ◽  
Dermochelys Coriacea ◽  
Neoplastic Disease ◽  
Extrinsic Factors ◽  
Eretmochelys Imbricata ◽  
Specific Pcr ◽  
The Impact

Chelonid alphaherpesvirus 5 (ChHV5) is strongly associated with fibropapillomatosis, a neoplastic disease of sea turtles that can result in debilitation and mortality. The objectives of this study were to examine green (Chelonia mydas), hawksbill (Eretmochelys imbricata), and leatherback (Dermochelys coriacea) sea turtles in Grenada, West Indies, for fibropapillomatosis and to utilize ChHV5-specific PCR, degenerate herpesvirus PCR, and serology to non-invasively evaluate the prevalence of ChHV5 infection and exposure. One-hundred and sixty-seven turtles examined from 2017 to 2019 demonstrated no external fibropapilloma-like lesions and no amplification of ChHV5 DNA from whole blood or skin biopsies. An ELISA performed on serum detected ChHV5-specific IgY in 18/52 (34.6%) of green turtles tested. In 2020, an adult, female green turtle presented for necropsy from the inshore waters of Grenada with severe emaciation and cutaneous fibropapillomas. Multiple tumors tested positive for ChHV5 by qPCR, providing the first confirmed case of ChHV5-associated fibropapillomatosis in Grenada. These results indicate that active ChHV5 infection is rare, although viral exposure in green sea turtles is relatively high. The impact of fibropapillomatosis in Grenada is suggested to be low at the present time and further studies comparing host genetics and immunologic factors, as well as examination into extrinsic factors that may influence disease, are warranted.

scholarly journals Impacts of small-scale fisheries on mangrove fish assemblages

2018 ◽  
Vol 76 (1) ◽  
pp. 153-164 ◽  
Author(s):  
José Amorim Reis-Filho ◽  
Euan S Harvey ◽  
Tommaso Giarrizzo
Keyword(s):  
Species Richness ◽  
Fishery Management ◽  
Management Practices ◽  
Fish Assemblages ◽  
Small Scale ◽  
Fishing Pressure ◽  
Community Size ◽  
Small Scale Fisheries ◽  
Fishing Impacts ◽  
The Impact

Abstract The data requirements and resources needed to develop effective indicators of fishing impacts on target stocks may often be great, especially for mangrove fisheries where, for example, tidal cycles sequentially flood and drain the habitat as a result of natural processes. Here, we used underwater video systems to evaluate the impact of small-scale fisheries on mangrove fish assemblages at four levels of fishing pressure (low, medium, high, and no pressure). The lowest values of species richness and abundance were recorded in the areas fished most intensively. Conversely, the highest species richness and the occurrence of larger-bodied fish were recorded in areas of reduced fishing activity, which was surprisingly similar to the “no fishing” areas. The slopes of the community size spectra steepened in response to exploitation, while the relative abundance of medium-sized fish (16–25 cm) declined. Fishing for local or regional markets, rather than subsistence, also led to a decrease in the abundance of larger fish (&gt;41 cm). The marked response of population parameters to fishing pressure reflected the impact of unregulated small-scale fisheries on areas of mangroves. Fishery management practices that ignore contemporary changes in these environments are likely to overestimate long-term yields, leading to overfishing. Thus, size-based approaches to evaluating fishing pressure were suitable for detecting negative responses from the mangrove fish assemblages. A next step will be to integrate size- and species-based ecological approaches that provide mechanisms to address pronounced decreases in specific species as a more profitable indicator of fishing impacts on mangrove fish assemblages. This approach will allow the development of effective conservation and management strategies.

scholarly journals An Examination of an Opportunity for Collaboration Among Stakeholders to Promote Conservation in Sea Turtle Tourism in Gilli Trawangan, Indonesia

2021 ◽  
Author(s):  
Allison Anne McCabe
Keyword(s):  
Sea Turtles ◽  
Sustainable Tourism ◽  
Tourism Development ◽  
Sea Turtle ◽  
Small Island ◽  
Small Islands ◽  
Stakeholder Collaboration ◽  
Turtle Conservation ◽  
Sea Turtle Conservation ◽  
The Impact

All species of sea turtles are globally endangered, largely due to the impact of unsustainable tourism. Gili Trawangan, a small island, depends on marine tourism and has an abundant population of sea turtles. Stakeholder collaboration is often used to promote sustainable tourism development and sea turtle conservation. This study examined stakeholder collaboration to promote conservation in sea turtle tourism in small islands by exploring a case study in Gili Trawangan, Indonesia. The study was conducted in 2010. It applied qualitative research methods to expand the knowledge of collaboration in the development of sustainable tourism in small islands. Stakeholder analysis helped to reveal barriers to and influences on tourism development to help promote sea turtle conservation and protect the livelihoods of local communities. Key findings are that education, financial considerations, management structure, regulatory conflict, a disconnect to the island, and stakeholder conflict are factors that influenced stakeholder collaboration in Gili Trawangan.

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