Title |
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en
Performance of a conical jellyfish exclusion device installed in a trawl net
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Creator |
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Accessrights |
open access |
Rights |
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ja
© 2012 公益社団法人日本水産学会
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en
© 2012 The Japanese Society of Fisheries Science
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en
The final publication is available at www.springerlink.com
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Subject |
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Other
en
Jellyfish
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Other
en
Nemopilema nomurai
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Other
en
Jellyfish exclusion device
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Other
en
Selectivity
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Other
en
Separator
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Other
en
Trawl
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NDC
665
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Description |
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Abstract
en
Recently, the increasing population of giant jellyfish Nemopilema nomurai has negatively affected coastal fisheries in Korea. As a result, the fishing industry has begun developing devices to prevent jellyfish capture. In this study, we assessed the performance of a conical jellyfish exclusion device in the coastal areas of Yokji Island in southern Korea during 2009. After hauling, we measured the length, diameter, and weight of the jellyfish and fish that were captured by the cod end and cover net. We found that the captured species included N. nomurai, silver croakers Pennahia argentata, yellow croakers Larimichthys polyactics, shotted halibut Eopsetta grigorjewi, largehead hairtails Trichiurus lepturus, and melon seeds Psenopsis anomala. The catch ratios of the giant jellyfish that entered the cod end in terms of weight ranged from 0.005 to 0.027. In contrast, the catch ratios of total fish in terms of weight and number were 0.793 and 0.835, respectively. On selectivity analysis of a conical separator for individual fish species, their exclusion ratios were independent of their length, and were similar to their observed exclusion ratios in terms of number. These results indicated that the conical jellyfish exclusion device performs well; however, some improvements are needed to minimize the escape of fish from the net.
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Publisher |
en
Springer
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Date |
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Language |
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Resource Type |
journal article |
Version Type |
AM |
Identifier |
HDL
http://hdl.handle.net/2115/54795
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Relation |
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isVersionOf
DOI
https://doi.org/10.1007/s12562-011-0416-x
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Journal |
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PISSN
0919-9268
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EISSN
1444-2906
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NCID
AA10993718
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en
Fisheries science
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Volume Number78
Issue Number1
Page Start23
Page End32
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File |
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Oaidate |
2023-07-26 |