Mitigating sea turtle by-catch in coastal passive net fisheries

Gilman, Eric, Gearhart, Jeff, Price, Blake, Eckert, Scott, Milliken, Henry, Wang, John, Swimmer, Yonat, Shiode, Daisuke, Abe, Osamu, Peckham, S. Hoyt, Chaloupka, Milani, Hall, Martin, Mangel, Jeff, Alfaro-Shigueto, Joanna, Dalzell, Paul and Ishizaki, Asuka (2010) Mitigating sea turtle by-catch in coastal passive net fisheries. Fish and Fisheries, 11 1: 57-88. doi:10.1111/j.1467-2979.2009.00342.x

Author Gilman, Eric
Gearhart, Jeff
Price, Blake
Eckert, Scott
Milliken, Henry
Wang, John
Swimmer, Yonat
Shiode, Daisuke
Abe, Osamu
Peckham, S. Hoyt
Chaloupka, Milani
Hall, Martin
Mangel, Jeff
Alfaro-Shigueto, Joanna
Dalzell, Paul
Ishizaki, Asuka
Title Mitigating sea turtle by-catch in coastal passive net fisheries
Journal name Fish and Fisheries   Check publisher's open access policy
ISSN 1467-2960
Publication date 2010-03-01
Year available 2009
Sub-type Article (original research)
DOI 10.1111/j.1467-2979.2009.00342.x
Volume 11
Issue 1
Start page 57
End page 88
Total pages 32
Place of publication Oxford, United Kingdom
Publisher Wiley-Blackwell Publishing
Language eng
Abstract There is growing evidence that small-scale, coastal, passive net fisheries may be the largest single threat to some sea turtle populations. We review assessments of turtle interactions in these fisheries, and experiments on gear-technology approaches (modifying gear designs, materials and fishing methods) to mitigate turtle by-catch, available from a small number of studies and fisheries. Additional assessments are needed to improve the limited understanding of the relative degree of risk coastal net fisheries pose to turtle populations, to prioritize limited conservation resources and identify suitable mitigation opportunities. Whether gear technology provides effective and commercially viable solutions, alone or in combination with other approaches, is not well-understood. Fishery-specific assessments and trials are needed, as differences between fisheries, including in gear designs; turtle and target species, sizes and abundance; socioeconomic context; and practicality affect efficacy and suitability of by-catch mitigation methods. Promising gear-technology approaches for gillnets and trammel nets include: increasing gear visibility to turtles but not target species, through illumination and line materials; reducing net vertical height; increasing tiedown length or eliminating tiedowns; incorporating shark-shaped silhouettes; and modifying float characteristics, the number of floats or eliminating floats. Promising gear-technology approaches for pound nets and other trap gear include: replacing mesh with ropes in the upper portion of leaders; incorporating a turtle releasing device into traps; modifying the shape of the trap roof to direct turtles towards the location of an escapement device; using an open trap; and incorporating a device to prevent sea turtle entrance into traps. Copyright © 1999-2010 John Wiley & Sons, Inc. All Rights Reserved.
Keyword By-catch
Passive net fisheries
Pound net
Sea turtle
Small-scale fisheries
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article first published online: 8 Oct 2009. Published under Reviews.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Biological Sciences Publications
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Created: Sun, 28 Feb 2010, 10:04:45 EST