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Mesh selectivity of the drum-shaped pot for starfish Asterina pectinifera in the western coastal waters of Korea

서해안 통발에 대한 별불가사리 (Asterina pectinifera)의 망목 선택성

  • Received : 2015.07.31
  • Accepted : 2015.08.25
  • Published : 2015.08.31

Abstract

Starfish, a species of Echinoderm, is widely known as a predator on benthic invertebrate. A series of fishing experiments was carried out in the western coastal waters of Korea from September, 2011 to November, 2012, using the drum-shaped pots of different mesh sizes (17.1, 24.8, 35.3, 39.8, and 48.3 mm) to describe the composition of the catch species and the mesh selectivity of the pot for starfish. Some species including fish, crab, and starfish were caught in the experimental pots. The SELECT (Share Each Length's Catch Total) method was applied to describe the selectivity of the pot for starfish Asterina pectinifera. The master selection curve was estimated to be s(R) = exp(10.358R-4.086) / [1+exp(10.358R-4.086)], where R is the ratio of arm length to mesh size. The relative arm length of 50% retention was 0.395, and the selection range was 0.212. The results should be helpful to understand the relationship between the catch size of starfish and the mesh size of pot.

Keywords

starfish;Asterina pectinifera;pot;selectivity;selection curve;SELECT method

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Acknowledgement

Supported by : 국립수산과학원