Defining risk variables causing gas embolism in loggerhead sea turtles (Caretta caretta) caught in trawls and gillnets

Abstract Incidental capture, or ‘bycatch’ in fishing gear is a major global threat to sea turtle populations. A recent study showed that underwater entrapment in fishing gear followed by rapid decompression may cause gas bubble formation within the blood stream (embolism) and tissues leading to orga...

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Autores principales:	Andreas Fahlman, Jose Luis Crespo-Picazo, Blair Sterba-Boatwright, Brian A. Stacy, Daniel Garcia-Parraga
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/66e3bd75693746e49d9114535d5ac81e
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spelling	oai:doaj.org-article:66e3bd75693746e49d9114535d5ac81e2021-12-02T12:32:38ZDefining risk variables causing gas embolism in loggerhead sea turtles (Caretta caretta) caught in trawls and gillnets10.1038/s41598-017-02819-52045-2322https://doaj.org/article/66e3bd75693746e49d9114535d5ac81e2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02819-5https://doaj.org/toc/2045-2322Abstract Incidental capture, or ‘bycatch’ in fishing gear is a major global threat to sea turtle populations. A recent study showed that underwater entrapment in fishing gear followed by rapid decompression may cause gas bubble formation within the blood stream (embolism) and tissues leading to organ injury, impairment, and even mortality in some bycaught individuals. We analyzed data from 128 capture events using logistic and ordinal regression to examine risk factors associated with gas embolism in sea turtles captured in trawls and gillnets. Likelihood of fatal decompression increases with increasing depth of gear deployment. A direct relationship was found between depth, risk and severity of embolism, which has not been previously demonstrated in any breath-hold diving species. For the trawl fishery in this study, an average trawl depth of 65 m was estimated to result in 50% mortality in by-caught turtles throughout the year. This finding is critical for a more accurate estimation of sea turtle mortality rates resulting from different fisheries and for devising efforts to avoid or minimize the harmful effects of capture.Andreas FahlmanJose Luis Crespo-PicazoBlair Sterba-BoatwrightBrian A. StacyDaniel Garcia-ParragaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Andreas Fahlman Jose Luis Crespo-Picazo Blair Sterba-Boatwright Brian A. Stacy Daniel Garcia-Parraga Defining risk variables causing gas embolism in loggerhead sea turtles (Caretta caretta) caught in trawls and gillnets
description	Abstract Incidental capture, or ‘bycatch’ in fishing gear is a major global threat to sea turtle populations. A recent study showed that underwater entrapment in fishing gear followed by rapid decompression may cause gas bubble formation within the blood stream (embolism) and tissues leading to organ injury, impairment, and even mortality in some bycaught individuals. We analyzed data from 128 capture events using logistic and ordinal regression to examine risk factors associated with gas embolism in sea turtles captured in trawls and gillnets. Likelihood of fatal decompression increases with increasing depth of gear deployment. A direct relationship was found between depth, risk and severity of embolism, which has not been previously demonstrated in any breath-hold diving species. For the trawl fishery in this study, an average trawl depth of 65 m was estimated to result in 50% mortality in by-caught turtles throughout the year. This finding is critical for a more accurate estimation of sea turtle mortality rates resulting from different fisheries and for devising efforts to avoid or minimize the harmful effects of capture.
format	article
author	Andreas Fahlman Jose Luis Crespo-Picazo Blair Sterba-Boatwright Brian A. Stacy Daniel Garcia-Parraga
author_facet	Andreas Fahlman Jose Luis Crespo-Picazo Blair Sterba-Boatwright Brian A. Stacy Daniel Garcia-Parraga
author_sort	Andreas Fahlman
title	Defining risk variables causing gas embolism in loggerhead sea turtles (Caretta caretta) caught in trawls and gillnets
title_short	Defining risk variables causing gas embolism in loggerhead sea turtles (Caretta caretta) caught in trawls and gillnets
title_full	Defining risk variables causing gas embolism in loggerhead sea turtles (Caretta caretta) caught in trawls and gillnets
title_fullStr	Defining risk variables causing gas embolism in loggerhead sea turtles (Caretta caretta) caught in trawls and gillnets
title_full_unstemmed	Defining risk variables causing gas embolism in loggerhead sea turtles (Caretta caretta) caught in trawls and gillnets
title_sort	defining risk variables causing gas embolism in loggerhead sea turtles (caretta caretta) caught in trawls and gillnets
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/66e3bd75693746e49d9114535d5ac81e
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Defining risk variables causing gas embolism in loggerhead sea turtles (Caretta caretta) caught in trawls and gillnets

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