On the Maturity and Spawning of the Longchin Goby Chasmichthys dolichognathus(HILGENDORF)

점망둑, Chasmichthys dolichognathus의 성성숙과 산란

  • BAEK Hea Ja (Department of Marine Biology, National Fisheries University of Pusan) ;
  • KIM Hyung Bae (Department of Marine Biology, National Fisheries University of Pusan) ;
  • LEE Taek Yuil (Department of Marine Biology, National Fisheries University of Pusan) ;
  • LEE Byung Don (Department of Marine Biology, National Fisheries University of Pusan)
  • 백혜자 (부산수산대학 자원생물학과) ;
  • 김형배 (부산수산대학 자원생물학과) ;
  • 이택열 (부산수산대학 자원생물학과) ;
  • 이병돈 (부산수산대학 자원생물학과)
  • Published : 1985.09.01

Abstract

This paper describes seasonal changes of total length, hepatosomatic index (HSI), fatness, egg-diameter composition, and fecundity of the longchin goby Chasmichthys dolichognathus(HILGENDORF). The specimens used were captured in the tide pool of Tongbaekseom, Pusan, Korea from February 1983 to January 1984. The age of longchin goby, tested by size frequency, was believed to be usually one year which grows to 8.0 cm in total length. The annual variations of HSI reached the maximum in the early spring when the gonad was actively growing and decreased during the spawning season from April to July. The coefficients of fatness were represented low values for the spawning periods. Frequency distribution of the egg diameter of mature ovary has three modes: one is the evident mode of the ripe eggs group, and the other two are modes of maturing and immature eggs groups. And an individual is considered as spawns one in the spawning season. Relationships between the fish size in total length (TL cm) and the number of ovarian eggs(F), the fish weight (BW g) and the number of ovarian eggs are indicated by the exponential equation respectively : F=42.585 $TL^{1.608}$, F= 524.589 $BW^{0.475}$.

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