가거도 인근해역 참조기(Larimichthys polyactis) 유자망의 망목선택성
Mesh Selectivity of Drift Gill Net for Yellow Croaker, Larimichthys polyactis, in the Coastal Sea of Gageo-do
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Abstract
The mesh selectivity of drift gill net for yellow croaker (Larimichthys polyactis) was examined in field experiments with six different net mesh size (40, 45, 50, 55, 60 and 65 mm) from April to December, 2008 in the northwestern coastal waters of Gageo-do, Korea. The total catch of 8,091 consisted of yellow croaker (n=7,574; 89.5% of total catch), common mackerel (n=162; 4.8%) and other species (n=355; 5.8%). The selectivity curve for the small size yellow croaker was fit by Kitahara's method to the polynomial equation S(R)=exp{(-0.552R3+4.927R2-11.591R+9.320)-6.717}. The optimal mesh size for 50% retention for minimum landing size(191mm) of yellow croaker was estimated as 51.1mm. This is very similar to the current drift net mesh size used in Gageo-do.
참고문헌 (12)
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