大村湾における海底底質によるナマコ桁網の漁具能率の変化
書誌事項
- タイトル別名
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- Catchability of Sea Cucumber Dredge Varied by Sea Bottom Sediment in Ohmura Bay
- オオムラワン ニ オケル カイテイテイシツ ニ ヨル ナマコ ケタアミ ノ ギョグ ノウリツ ノ ヘンカ
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In the present study, the sea cucumber dredge area in Ohmura Bay, Nagasaki Prefecture (off the Fisheries Cooperative of Ohmura Bay) were partitioned in 10 seconds lat/long mesh and still images of 37 site covering the entire area were taken. The sea bottom substrate material and the density of gravel (>6.4×10^<-2>m in diameter) were then calculated from the images. The relationship between bottom sediment and the sea cucumber catch was then investigated from the number (individual/ha: CPUE[Ind.]) of sea cucumber caught per unit of the dredged area from 81 times of dredging by the sampling ship. Most part of the operation was conducted on S sea bottom. A negative correlation was found between the average gravel density and the CPUE[W] (n=162, r=-0.29, p<0.01) but the CPUE[Ind.] was diphasic distribution, exhibiting peak at 0 and 9 average gravel densities (number/m^2). From these results, gravel density is not only important factor that changes the Catchability of sea cucumber dredge, but also time changes the individual size and habitat density.
収録刊行物
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- 日本水産工学会誌
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日本水産工学会誌 47 (1), 7-12, 2010
日本水産工学会
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詳細情報 詳細情報について
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- CRID
- 1390282680839644288
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- NII論文ID
- 110007686837
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- NII書誌ID
- AN10278554
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- ISSN
- 21897131
- 09167617
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- NDL書誌ID
- 10797193
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- IRDB
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可