Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)
- Volume 1 Issue 1
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- Pages.31-43
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- 1968
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- 0374-8111(pISSN)
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- 2287-8815(eISSN)
Analysis of the Shell Height Frequencies on the Fresh-Water Cockle, Corbicula elatior, by Means of Probability Graph
확률도에 의한 재첩(Corbicula elatior) 각고빈도의 분석
- PARK Sing Won (Pusan Fisheries College) ;
- LEE Sung Hun (Seoul National University College of Education)
- Published : 1968.03.01
Abstract
1. Shell height frequencies of the fresh-water cockle, Corbicula elatior, sampled in the period of 1960 to 1963, are analyzed to assess the age composition and average growth pattern. Cumulative frequencies in a sample are traced on a probability scale, and the points of inflection on a probability graph are assumed to dissect age groups. 2. Seasonal growth of Corbicula elatior in the Naktong River ill as follows: Young cockles settle down on river-bed by June and grow rapidly during the summer season, reaching 14mm in shell height by October. From October to April the growth is very slow. The rapid growth in the second year starts around in May. 3. Survival rate per year for Corbicula elatior in the Naktong River is estimated to be
낙동강 하구산 재첩 (Corbicula elatior)을 채취구의 찬택성이 다른 이종의 채취구로서 채집하여 표본의 각고류도의 확률도에 따라 각년령군으로 분리하여 성장과 연령조성을 추정하고 연간 평균생잔률을 추산하였다.
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