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Effective sampling of estuarine fauna by a passive net in theWest Sea of Korea occurring strong tide

조류가 강한 서해 하구에서 수동어구를 이용한 하구역 유영생물의 효율적 채집

  • Hwang, Sun-Do (Fisheires Resources Agency) ;
  • Im, Yang-Jae (West Sea Fisheries Research Institute, National Fisheries Research Development Institute)
  • 황선도 (수산자원사업단) ;
  • 임양재 (국립수산과학원 서해수산연구소)
  • Received : 2011.07.21
  • Accepted : 2011.10.12
  • Published : 2011.11.30

Abstract

To obtain the effective sampling estuarine fauna by a passive net in the West Sea of Korea occurring strong tide, catch were collected by bag nets with various sampling trials off Ganghwa Island in November 2009. We compared the difference of community structures (on spring tide vs. neap tide, total sample vs. subsample and 4 nets vs. 1 net) with each species composition as a sampling unit by the Pearson chi-square test. Number of individual at the spring tide was more abundant than that at the neap tide (p<0.0001) although number of species at the spring tide was not significantly different with that at the neap tide (p=0.174). Both number of species (p=0.138) and number of individual (p=0.096) were not significantly different between total sample and random subsample. Number of species was not significantly different between the subsample by 1 net and the subsample by 4 nets (p=0.515), but number of individual was a little different on both samples (p=0.024). In conclusion, we suggest the subsample by 1 net at spring tide as the effective sampling estuarine fauna by a passive net in the West Sea occurring strong tide.

Acknowledgement

Grant : 서해연안어업자원조사

Supported by : 국립수산과학원 서해수산연구소

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