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Improving size selectivity of round pot for Charybdis japonica by configuring escape vents in the Yellow Sea, China
Sustainable development of the important economic species, Asian paddle crab (Charybdis japonica), has attracted attention in the coastal waters of the Yellow Sea, China. The commonly used round pots are almost nonselective, resulting in severe bycatch of juveniles. In this study, we explored a meth...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
PeerJ Inc.
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8504466/ https://www.ncbi.nlm.nih.gov/pubmed/34707944 http://dx.doi.org/10.7717/peerj.12282 |
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author | Yu, Mengjie Zhang, Liyou Liu, Changdong Tang, Yanli |
author_facet | Yu, Mengjie Zhang, Liyou Liu, Changdong Tang, Yanli |
author_sort | Yu, Mengjie |
collection | PubMed |
description | Sustainable development of the important economic species, Asian paddle crab (Charybdis japonica), has attracted attention in the coastal waters of the Yellow Sea, China. The commonly used round pots are almost nonselective, resulting in severe bycatch of juveniles. In this study, we explored a method to improve the size selectivity for C. japonica by mounting escape vents on the side panels of each pot. The selectivity of pots with escape vent sizes of 70 mm × 20 mm, 70 mm × 25 mm, 70 mm × 30 mm, and 70 mm × 35 mm was tested using a catch comparison method. The estimated minimum landing size (MLS) of carapace height (27 mm), according to the regulated MLS of carapace length (50 mm), was used as a reference point to explain the results. Significant increases in the size of crabs caught by pots were found with the enlargement of escape vent size (Kruskal–Wallis test, P < 0.01). The pots with 70 mm × 20 mm, 70 mm × 25 mm and 70 mm × 30 mm escape vents released nearly 50%, 75% and 95% of undersized individuals, respectively, and these three types of pots retained approximately 90% of legal-sized individuals compared with the control pots without escape vents. The pots with 70 mm × 35 mm escape vents released nearly all undersized individuals, but they also released most legal-sized individuals. Pots with an escape vent size of 70 mm × 30 mm were recommended for the sustainable development of C. japonica in the Yellow Sea of China. The results of this study reiterate the importance of carapace height for determining the size selectivity, which can serve as a reference to formulate management regulations in the coastal waters of the Yellow Sea, China. |
format | Online Article Text |
id | pubmed-8504466 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | PeerJ Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-85044662021-10-26 Improving size selectivity of round pot for Charybdis japonica by configuring escape vents in the Yellow Sea, China Yu, Mengjie Zhang, Liyou Liu, Changdong Tang, Yanli PeerJ Aquaculture, Fisheries and Fish Science Sustainable development of the important economic species, Asian paddle crab (Charybdis japonica), has attracted attention in the coastal waters of the Yellow Sea, China. The commonly used round pots are almost nonselective, resulting in severe bycatch of juveniles. In this study, we explored a method to improve the size selectivity for C. japonica by mounting escape vents on the side panels of each pot. The selectivity of pots with escape vent sizes of 70 mm × 20 mm, 70 mm × 25 mm, 70 mm × 30 mm, and 70 mm × 35 mm was tested using a catch comparison method. The estimated minimum landing size (MLS) of carapace height (27 mm), according to the regulated MLS of carapace length (50 mm), was used as a reference point to explain the results. Significant increases in the size of crabs caught by pots were found with the enlargement of escape vent size (Kruskal–Wallis test, P < 0.01). The pots with 70 mm × 20 mm, 70 mm × 25 mm and 70 mm × 30 mm escape vents released nearly 50%, 75% and 95% of undersized individuals, respectively, and these three types of pots retained approximately 90% of legal-sized individuals compared with the control pots without escape vents. The pots with 70 mm × 35 mm escape vents released nearly all undersized individuals, but they also released most legal-sized individuals. Pots with an escape vent size of 70 mm × 30 mm were recommended for the sustainable development of C. japonica in the Yellow Sea of China. The results of this study reiterate the importance of carapace height for determining the size selectivity, which can serve as a reference to formulate management regulations in the coastal waters of the Yellow Sea, China. PeerJ Inc. 2021-10-08 /pmc/articles/PMC8504466/ /pubmed/34707944 http://dx.doi.org/10.7717/peerj.12282 Text en © 2021 Yu et al. https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://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 Yu, Mengjie Zhang, Liyou Liu, Changdong Tang, Yanli Improving size selectivity of round pot for Charybdis japonica by configuring escape vents in the Yellow Sea, China |
title | Improving size selectivity of round pot for Charybdis japonica by configuring escape vents in the Yellow Sea, China |
title_full | Improving size selectivity of round pot for Charybdis japonica by configuring escape vents in the Yellow Sea, China |
title_fullStr | Improving size selectivity of round pot for Charybdis japonica by configuring escape vents in the Yellow Sea, China |
title_full_unstemmed | Improving size selectivity of round pot for Charybdis japonica by configuring escape vents in the Yellow Sea, China |
title_short | Improving size selectivity of round pot for Charybdis japonica by configuring escape vents in the Yellow Sea, China |
title_sort | improving size selectivity of round pot for charybdis japonica by configuring escape vents in the yellow sea, china |
topic | Aquaculture, Fisheries and Fish Science |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8504466/ https://www.ncbi.nlm.nih.gov/pubmed/34707944 http://dx.doi.org/10.7717/peerj.12282 |
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