Using the turtle excluder device (TED) in the pink shrimp trawling fishery off southern Brazil

The use of the turtle excluder device (TED) has been mandatory in Brazil since 1994. In spite of the importance of sea turtle bycatch reduction, TED effectiveness to maintain target species capture had never been evaluated in shrimp fisheries off southern Brazil. F or this purpose, a test was carrie...

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Published inLatin american journal of aquatic research Vol. 44; no. 5; pp. 1123 - 1129
Main Authors Schroeder, Rafael, Bottene, Bruno R., Sant Ana, Rodrigo, Wahrlich, Roberto, Queirolo, Dante
Format Journal Article
LanguageEnglish
Spanish
Published Pontificia Universidad Catolica de Valparaiso, Escuela de Ciencias del Mar 01.11.2016
Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
Subjects
FISHERIES
MARINE & FRESHWATER BIOLOGY
OCEANOGRAPHY
Brasil
trawl fishery
incidental catch
sea turtles
pesquería de arrastre
tortugas marinas
captura incidental
sur de Brasil
southern Brazil
dispositivo excluidor de tortugas
turtle excluder device
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ISSN0718-560X
0718-560X
DOI10.3856/vol44-issue5-fulltext-21

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Summary:The use of the turtle excluder device (TED) has been mandatory in Brazil since 1994. In spite of the importance of sea turtle bycatch reduction, TED effectiveness to maintain target species capture had never been evaluated in shrimp fisheries off southern Brazil. F or this purpose, a test was carried out in November 2013 with the TED installed with two different configurations, top or bottom opening under the supervision of a technician of the National Oceanic and Atmospheric Administration (NOAA). Absolute catch and fishery yields were simultaneously monitored in 10 fishing hauls of a double-rig trawler by an onboard observer in one net equipped with a TED and the other without a TED. Although a Bayesian hypothesis test demonstrated no significant differences through the simultaneous comparison of absolute capture considering the use and nonuse of the TED, the credibility interval of posterior beta distributions intercepted almost its minimum limit which weakens the hypothesis of equality. In terms of orientation, the model mounted with the top opening showed no differences in absolute catches of the target species in respect to control.
ISSN:0718-560X
0718-560X
DOI:10.3856/vol44-issue5-fulltext-21