Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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A Mass Mortality of the Finless Porpoise Neophocaena asiaeorientalis at a Dike of the Saemangeum Sea: Possible Effects of Unusually Low Temperatures

새만금에서 발생한 상괭이(Neophocaena asiaeorientalis)의 대량 폐사: 이상 저온에 따른 영향의 증거

  • Park, Kyum Joon (Cetacean Research Institute, National Fisheries Research & Development Institute) ;
  • An, Du Hae (Cetacean Research Institute, National Fisheries Research & Development Institute) ;
  • Lim, Chae Woong (College of Veterinary Medicine, Chonbuk National University) ;
  • Lee, Tae-Ho (Saemangeum Project Office, Korea Rural Community Corporation) ;
  • Kim, Doo Nam (Cetacean Research Institute, National Fisheries Research & Development Institute)
  • 박겸준 (국립수산과학원 고래연구소) ;
  • 안두해 (국립수산과학원 고래연구소) ;
  • 임채웅 (전북대학교 수의과대학) ;
  • 이태호 (한국농어촌공사 새만금사업단) ;
  • 김두남 (국립수산과학원 고래연구소)
  • Received : 2012.10.18
  • Accepted : 2012.12.06
  • Published : 2012.12.31
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Abstract

On 3 February 2011, a mass mortality of finless porpoises Neophocaena asiaeorientalis occurred at a dike of the Saemangeum Sea dike. A total of 249 carcasses were collected; these had been stranded by a sea dike and had floated into the lake formed by the dike. Eight bodies were measured, and four of these were dissected to analyze stomach contents. The blubber thicknesses of five bodies were compared with those of caught finless porpoises in the Yellow Sea from 2010. Finless porpoises at the Saemangeum Sea dike exhibited better nutritive conditions than finless porpoises in the Yellow Sea. Air temperature in January 2011 was lower than the prior 5-year average (P<0.05). Water temperature when the mass mortality occurred was lower than values observed in 2009 and 2010: values below $0^{\circ}C$ had been recorded, and the majority of the dike lake had frozen over. The mass mortality of finless porpoises may have been caused by these unusually low temperatures.

Keywords

References

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