2010年1月
Comparison of hook selectivity curve between two different-shaped hooks for red tilefish Branchiostegus japonicus
NIPPON SUISAN GAKKAISHI
- ,
- ,
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- 巻
- 76
- 号
- 1
- 開始ページ
- 46
- 終了ページ
- 53
- 記述言語
- 日本語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.2331/suisan.76.46
- 出版者・発行元
- JAPANESE SOC FISHERIES SCIENCE
Two different-shaped hooks, 'Tainawa-bari' and 'Mutsu-bari', are currently used by commercial longline fisheries targeting red tilefish in the East China Sea. The shape of 'Mutsu-bari' is more circular than Tainawa-bari'. For protecting young small fish, selecting an appropriate hook size is a potential resource conservation measure. Hence, the size selectivity of each hook should be evaluated. Comparative fishing experiments were conducted using both 'Tainawa-bari' of four sizes (Japanese nominal number #10, 12, 14, and 16) and 'Mutsu-barr of #13.5 size in the East China Sea. The parameters of size selectivity of 'Tainawa-bari' and 'Mutsu-bari' were estimated by the SELECT method under the assumption of geographical similarity on upper jaw length and hook width of a given retention probability. As a result of AIC model selection, a single master curve using a short hook width for 'Mutsu-bari' as the hook width parameter was chosen for expressing hook size selectivity of the two hooks, which implied no difference in size selectivity between the two different-shaped hooks. Thus, the single master curve for hook size selectivity and relative fishing intensity of each hook can be used for fisheries resource management.
- リンク情報
- ID情報
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- DOI : 10.2331/suisan.76.46
- ISSN : 0021-5392
- Web of Science ID : WOS:000276023200006