Effect of escape vents on retention and size selectivity of crab pots for swimming crab Portunus trituberculatus in the East China Sea

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Tytuł:: Effect of escape vents on retention and size selectivity of crab pots for swimming crab Portunus trituberculatus in the East China Sea
Autorzy:: Jian Zhang
Zhanwen Pei
Pingguo He
Jiangao Shi
Temat:: Crab pots
Portunus trituberculatus
Escape vents
Retention
Size selection
Location
Aquaculture. Fisheries. Angling
SH1-691
Źródło:: Aquaculture and Fisheries, Vol 6, Iss 4, Pp 340-347 (2021)
Wydawca:: KeAi Communications Co., Ltd., 2021.
Rok publikacji:: 2021
Kolekcja:: LCC:Aquaculture. Fisheries. Angling
Typ dokumentu:: article
Opis pliku:: electronic resource
Język:: English
ISSN:: 2468-550X
Relacje:: http://www.sciencedirect.com/science/article/pii/S2468550X20300502; https://doaj.org/toc/2468-550X
DOI:: 10.1016/j.aaf.2020.04.008
Dostęp URL:: https://doaj.org/article/74177df85f4741829811fc12d94063e7 Link otwiera się w nowym oknie
Numer akcesji:: edsdoj.74177df85f4741829811fc12d94063e7
: Czasopismo naukowe

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An increase in the crab pot fishery in the East China Sea has caused great pressure on swimming crab Portunus trituberculatus resources. Thus, it is essential to implement suitable measures to release sublegal-sized crabs to increase the number of recruits for legal-sized crabs. One of the measures considered is the installation of escape vents on crab pots. We tested crab pots with one and two escape vents and compared the catchability and size selectivity of these pots with control pots without an escape vent. Pots with one escape vent located on single side of the pot, top or bottom (SS), and another on both sides at top and bottom edges (BS) were tested in sea trial experiments following typical commercial fishing practice. The results show that both SS pots and BS pots caught significantly smaller number of sublegal-sized crabs (

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