Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Feeding Habits and Consumption by Finless Porpoises (Neophocaena asiaeorientalis) in the Yellow Sea

한국 서행 상괭이 (Neophocaena asiaeorientalis)의 먹이습성과 섭식량

  • Park, Kyum-Joon (Cetacean Research Institute, National Fisheries Research and Development Institute) ;
  • An, Yong-Rock (Cetacean Research Institute, National Fisheries Research and Development Institute) ;
  • Lee, Young-Ran (Cetacean Research Institute, National Fisheries Research and Development Institute) ;
  • Park, Ji-Eun (Cetacean Research Institute, National Fisheries Research and Development Institute) ;
  • Moon, Dae-Yeon (Cetacean Research Institute, National Fisheries Research and Development Institute) ;
  • Choi, Seok-Gwan (Cetacean Research Institute, National Fisheries Research and Development Institute)
  • 박겸준 (국립수산과학원 고래연구소) ;
  • 안용락 (국립수산과학원 고래연구소) ;
  • 이영란 (국립수산과학원 고래연구소) ;
  • 박지은 (국립수산과학원 고래연구소) ;
  • 문대연 (국립수산과학원 고래연구소) ;
  • 최석관 (국립수산과학원 고래연구소)
  • Received : 2010.09.29
  • Accepted : 2011.02.10
  • Published : 2011.02.28
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Abstract

We investigated the stomach contents of finless porpoises collected in the Yellow Sea. Prey organisms in the stomachs of 109 finless porpoises were identified as 11 species of fish, 8 species of shrimp and 4 species of cephalopod. Index of Relative Importance analysis revealed that the porpoises fed mainly on the Japanese sand shrimp (Crangon affinis). The energy density of the prey was estimated to be 5.46 kJ. The daily energy requirement was estimated to be 18,051 kJ/day for a porpoise with an average weight of 32.49 kg. The estimated annual consumption by finless porpoises in the Yellow Sea was 25,454 tons. The average commercial catch in the Yellow Sea by Korean fisheries was 135,913 tons from 2005 to 2009. Assuming that the abundance of finless porpoises is stable, porpoises ate approximately 18.7% of the commercial catch. The fishery catch may be influenced by the consumption by finless porpoises, while fishery bycatch is a cause of porpoise mortality in the Yellow Sea.

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