Assessing gear modifications needed to optimize yields in a heavily exploited, multi-species, seagrass and coral reef fishery.

Effective management is necessary if small-scale fisheries, such as those found in mixed habitats including seagrass and coral reefs, are to continue providing food for many of the poorest communities of the world. Gear-based management, although under represented and under studied, has the potentia...

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Autores principales:	Christina C Hicks, Timothy R McClanahan
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a41c5c6b5f1a4107b16bf71bcaf1cc1b
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spelling	oai:doaj.org-article:a41c5c6b5f1a4107b16bf71bcaf1cc1b2021-11-18T07:19:42ZAssessing gear modifications needed to optimize yields in a heavily exploited, multi-species, seagrass and coral reef fishery.1932-620310.1371/journal.pone.0036022https://doaj.org/article/a41c5c6b5f1a4107b16bf71bcaf1cc1b2012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22574133/?tool=EBIhttps://doaj.org/toc/1932-6203Effective management is necessary if small-scale fisheries, such as those found in mixed habitats including seagrass and coral reefs, are to continue providing food for many of the poorest communities of the world. Gear-based management, although under represented and under studied, has the potential to be adaptive, address multiple objectives, and be crafted to the socio-economic setting. Management effectiveness in seagrass and coral reef fisheries has generally been evaluated at the scale of the fish community. However, community level indicators can mask species-specific declines that provide significant portions of the fisheries yields and income. Using a unique dataset, containing ten years of species level length frequency catch data from a multi-gear, multi-species seagrass and coral reef fishery in Kenya, we evaluate species specific fishery statuses, compare gear use to gear regulations and estimate the potential needs for further gear restrictions. Despite the high diversity of the fishery, fifteen species represented over 90% of the catch, and only three species represented 60% of the catch. The three most abundant species in the catch, Lethrinus lentjan (Lacepède), Siganus sutor (Valenciennes) and Leptoscarus vaigiensis (Quoy & Gaimard) all showed evidence of growth overfishing. Lethrinus lentjan, with an exploitation rate of 0.82, also shows evidence of recruitment overfishing. Current legal but weakly enforced gear restrictions are capable of protecting a significant portion of the catch up to maturity but optimization of yield will require that the current mesh size be increased from 6.3 to 8.8 and 9.2 cm to increase yields of L. lentjan and S. sutor, respectively. Given the difficulties of enforcing mesh size, we recommend that the economic benefits of these larger mesh sizes be communicated and enforced through co-management. This abstract is also available in Kiswahili (Abstract S1).Christina C HicksTimothy R McClanahanPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 5, p e36022 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Christina C Hicks Timothy R McClanahan Assessing gear modifications needed to optimize yields in a heavily exploited, multi-species, seagrass and coral reef fishery.
description	Effective management is necessary if small-scale fisheries, such as those found in mixed habitats including seagrass and coral reefs, are to continue providing food for many of the poorest communities of the world. Gear-based management, although under represented and under studied, has the potential to be adaptive, address multiple objectives, and be crafted to the socio-economic setting. Management effectiveness in seagrass and coral reef fisheries has generally been evaluated at the scale of the fish community. However, community level indicators can mask species-specific declines that provide significant portions of the fisheries yields and income. Using a unique dataset, containing ten years of species level length frequency catch data from a multi-gear, multi-species seagrass and coral reef fishery in Kenya, we evaluate species specific fishery statuses, compare gear use to gear regulations and estimate the potential needs for further gear restrictions. Despite the high diversity of the fishery, fifteen species represented over 90% of the catch, and only three species represented 60% of the catch. The three most abundant species in the catch, Lethrinus lentjan (Lacepède), Siganus sutor (Valenciennes) and Leptoscarus vaigiensis (Quoy & Gaimard) all showed evidence of growth overfishing. Lethrinus lentjan, with an exploitation rate of 0.82, also shows evidence of recruitment overfishing. Current legal but weakly enforced gear restrictions are capable of protecting a significant portion of the catch up to maturity but optimization of yield will require that the current mesh size be increased from 6.3 to 8.8 and 9.2 cm to increase yields of L. lentjan and S. sutor, respectively. Given the difficulties of enforcing mesh size, we recommend that the economic benefits of these larger mesh sizes be communicated and enforced through co-management. This abstract is also available in Kiswahili (Abstract S1).
format	article
author	Christina C Hicks Timothy R McClanahan
author_facet	Christina C Hicks Timothy R McClanahan
author_sort	Christina C Hicks
title	Assessing gear modifications needed to optimize yields in a heavily exploited, multi-species, seagrass and coral reef fishery.
title_short	Assessing gear modifications needed to optimize yields in a heavily exploited, multi-species, seagrass and coral reef fishery.
title_full	Assessing gear modifications needed to optimize yields in a heavily exploited, multi-species, seagrass and coral reef fishery.
title_fullStr	Assessing gear modifications needed to optimize yields in a heavily exploited, multi-species, seagrass and coral reef fishery.
title_full_unstemmed	Assessing gear modifications needed to optimize yields in a heavily exploited, multi-species, seagrass and coral reef fishery.
title_sort	assessing gear modifications needed to optimize yields in a heavily exploited, multi-species, seagrass and coral reef fishery.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/a41c5c6b5f1a4107b16bf71bcaf1cc1b
work_keys_str_mv	AT christinachicks assessinggearmodificationsneededtooptimizeyieldsinaheavilyexploitedmultispeciesseagrassandcoralreeffishery AT timothyrmcclanahan assessinggearmodificationsneededtooptimizeyieldsinaheavilyexploitedmultispeciesseagrassandcoralreeffishery
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Assessing gear modifications needed to optimize yields in a heavily exploited, multi-species, seagrass and coral reef fishery.

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