The Korean Journal of Malacology (한국패류학회지)

The Malacological Society of Korea (한국패류학회)
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Variation in physiological energetics of blood cockle Scapharca subcrenata (Bivalvia: Arcidae) from Yeoja bay, South coast of Korea

여자만 새꼬막, Scapharca subcrenata (Bivalvia: Arcidae)의 생리적변화 및 계절별 에너지수지

  • 신윤경 (국립수산과학원 전략양식연구소 양식관리과) ;
  • 이원찬 (국립수산과학원 기반연구부 어장환경과) ;
  • 김성연 (국립수산과학원 연구기획부 연구기획과) ;
  • 전제천 (국립수산과학원 전략양식연구소 양식관리과) ;
  • 김응오 (국립수산과학원 전략양식연구소 양식관리과)
  • Received : 2011.09.01
  • Accepted : 2011.09.28
  • Published : 2011.09.30
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Abstract

This study presents physiological rates of oxygen consumption, ammonia excretion, feeding rates, O/N ratio and assimilation efficiency of the blood cockle, Scapharca subcrenata, determined from specimens collected in Yeoja bay on the south coast of Korea. Physiological parameters were measured monthly under static, laboratory controlled conditions with ambient conditions, and measurements were performed seasonally in order to estimate scope for growth and its probable sources of variation. Oxygen consumption and ammonia excretion rates have been increased as temperature increased with the highest value of August, 2008. Feeding rate was the highest during April whereas the lowest was during August which is a period of gametogenesis with minimum biomass of phytoplankton around sampling area. Assimilation efficiency was not significantly different seasonally and O/N ratio decreased during July to August. The scope for growth was negative during high temperature months(July to August), reflecting the high temperature and low feeding rate, and had its highest positive values during spring and autumn. Data on the physiological parameters and scope for growth of Scapharca subcrenata obtained in this study will be used to assess the carrying capacity for blood cockle cultivation.

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References

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