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Comparing the catch composition, profitability and discard survival from different trammel net designs targeting common spiny lobster (Palinurus elephas) in a Mediterranean fishery

In the Balearic Islands, different trammel net designs have been adopted to promote fisheries sustainability and reduce discards. Here, we compare the catch performance of three trammel net designs targeting the spiny lobster Palinurus elephas in terms of biomass, species composition and revenue fro...

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Autores principales: Catanese, Gaetano, Hinz, Hilmar, Gil, Maria del Mar, Palmer, Miquel, Breen, Michael, Mira, Antoni, Pastor, Elena, Grau, Amalia, Campos-Candela, Andrea, Koleva, Elka, Grau, Antoni Maria, Morales-Nin, Beatriz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5960583/
https://www.ncbi.nlm.nih.gov/pubmed/29785340
http://dx.doi.org/10.7717/peerj.4707
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author Catanese, Gaetano
Hinz, Hilmar
Gil, Maria del Mar
Palmer, Miquel
Breen, Michael
Mira, Antoni
Pastor, Elena
Grau, Amalia
Campos-Candela, Andrea
Koleva, Elka
Grau, Antoni Maria
Morales-Nin, Beatriz
author_facet Catanese, Gaetano
Hinz, Hilmar
Gil, Maria del Mar
Palmer, Miquel
Breen, Michael
Mira, Antoni
Pastor, Elena
Grau, Amalia
Campos-Candela, Andrea
Koleva, Elka
Grau, Antoni Maria
Morales-Nin, Beatriz
author_sort Catanese, Gaetano
collection PubMed
description In the Balearic Islands, different trammel net designs have been adopted to promote fisheries sustainability and reduce discards. Here, we compare the catch performance of three trammel net designs targeting the spiny lobster Palinurus elephas in terms of biomass, species composition and revenue from commercial catches and discards. Designs differ in the netting fiber type (standard polyfilament, PMF, or a new polyethylene multi-monofilament, MMF) and the use of a guarding net or greca, a mesh piece intended to reduce discards. Catches were surveyed by an on-board observer from 1,550 netting walls corresponding to 70 nets. The number of marketable species captured indicated that the lobster trammel net fishery has multiple targets, which contribute significantly to the total revenue. The discarded species ranged from habitat-forming species to elasmobranches, but the magnitude of gear-habitat interactions on the long term dynamics of benthos remains unclear. No relevant differences in revenue and weight of discards were detected after Bayesian analyses. However, the species composition of discards was different when using greca. Interestingly, high immediate survival was found for discarded undersized lobsters, while a seven day survival assessment, using captive observation, gave an asymptotic estimate of survival probability as 0.64 (95% CI [0.54–0.76]). Therefore, it is recommended that it would be beneficial for this stock if an exemption from the EU landing obligation regulation was sought for undersized lobsters in the Balearic trammel net fishery.
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spelling pubmed-59605832018-05-21 Comparing the catch composition, profitability and discard survival from different trammel net designs targeting common spiny lobster (Palinurus elephas) in a Mediterranean fishery Catanese, Gaetano Hinz, Hilmar Gil, Maria del Mar Palmer, Miquel Breen, Michael Mira, Antoni Pastor, Elena Grau, Amalia Campos-Candela, Andrea Koleva, Elka Grau, Antoni Maria Morales-Nin, Beatriz PeerJ Aquaculture, Fisheries and Fish Science In the Balearic Islands, different trammel net designs have been adopted to promote fisheries sustainability and reduce discards. Here, we compare the catch performance of three trammel net designs targeting the spiny lobster Palinurus elephas in terms of biomass, species composition and revenue from commercial catches and discards. Designs differ in the netting fiber type (standard polyfilament, PMF, or a new polyethylene multi-monofilament, MMF) and the use of a guarding net or greca, a mesh piece intended to reduce discards. Catches were surveyed by an on-board observer from 1,550 netting walls corresponding to 70 nets. The number of marketable species captured indicated that the lobster trammel net fishery has multiple targets, which contribute significantly to the total revenue. The discarded species ranged from habitat-forming species to elasmobranches, but the magnitude of gear-habitat interactions on the long term dynamics of benthos remains unclear. No relevant differences in revenue and weight of discards were detected after Bayesian analyses. However, the species composition of discards was different when using greca. Interestingly, high immediate survival was found for discarded undersized lobsters, while a seven day survival assessment, using captive observation, gave an asymptotic estimate of survival probability as 0.64 (95% CI [0.54–0.76]). Therefore, it is recommended that it would be beneficial for this stock if an exemption from the EU landing obligation regulation was sought for undersized lobsters in the Balearic trammel net fishery. PeerJ Inc. 2018-05-17 /pmc/articles/PMC5960583/ /pubmed/29785340 http://dx.doi.org/10.7717/peerj.4707 Text en © 2018 Catanese et al. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Aquaculture, Fisheries and Fish Science
Catanese, Gaetano
Hinz, Hilmar
Gil, Maria del Mar
Palmer, Miquel
Breen, Michael
Mira, Antoni
Pastor, Elena
Grau, Amalia
Campos-Candela, Andrea
Koleva, Elka
Grau, Antoni Maria
Morales-Nin, Beatriz
Comparing the catch composition, profitability and discard survival from different trammel net designs targeting common spiny lobster (Palinurus elephas) in a Mediterranean fishery
title Comparing the catch composition, profitability and discard survival from different trammel net designs targeting common spiny lobster (Palinurus elephas) in a Mediterranean fishery
title_full Comparing the catch composition, profitability and discard survival from different trammel net designs targeting common spiny lobster (Palinurus elephas) in a Mediterranean fishery
title_fullStr Comparing the catch composition, profitability and discard survival from different trammel net designs targeting common spiny lobster (Palinurus elephas) in a Mediterranean fishery
title_full_unstemmed Comparing the catch composition, profitability and discard survival from different trammel net designs targeting common spiny lobster (Palinurus elephas) in a Mediterranean fishery
title_short Comparing the catch composition, profitability and discard survival from different trammel net designs targeting common spiny lobster (Palinurus elephas) in a Mediterranean fishery
title_sort comparing the catch composition, profitability and discard survival from different trammel net designs targeting common spiny lobster (palinurus elephas) in a mediterranean fishery
topic Aquaculture, Fisheries and Fish Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5960583/
https://www.ncbi.nlm.nih.gov/pubmed/29785340
http://dx.doi.org/10.7717/peerj.4707
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