Development and Reproduction (한국발생생물학회지:발생과생식)

The Korean Society of Developmental Biology (한국발생생물학회)
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Egg Development of the Ussurian Bullhead Fish, Leiocassis ussuriensis (Pisces: Bagridae) and Morphological Development of Its Larvae and Juveniles

  • Park, Jae-Min (Gyeongsangbuk-do Native Fish Business Center) ;
  • Yim, Hu-Sun (Gyeongsangbuk-do Native Fish Business Center) ;
  • Lee, Yong-Sik (Dept. of Aqualife Science, Chonnam National University) ;
  • Kim, Heung-Yun (Dept. of Aqualife Medicine, Chonnam National University) ;
  • Han, Kyeong-Ho (Dept. of Aqualife Science, Chonnam National University)
  • Received : 2015.10.10
  • Accepted : 2015.11.01
  • Published : 2015.12.31
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Abstract

This study was examined the ovogenesis of Ussurian bullhead, Leiocassis ussuriensis and the morphological development of its larvae and juveniles and to use the results as basic information for the preservation of species and resource enhancement. For artificial egg collection, human chorionic gonadotropin (HCG) was injected at a rate of 10 IU per gram of fish weight. During breeding period, water temperature maintained at $24.5{\sim}26.5^{\circ}C$ (mean $25.0{\pm}0.05^{\circ}C$). The process of ovogenesis reached the two-cell stage in 50 minutes after fertilization. In 73 hours of fertilization the movement of the embryoid body became active state and the larvae began to hatch from the tail through the oolemma. Length of prelarvae were 6.33~6.50 mm long (mean $6.40{\pm}0.06mm$) just after hatching having yolk with their mouth not opened. After thirty eight days of hatching, juveniles were 30.6~32.5 mm long (mean $31.5{\pm}0.65mm$). The color was dark yellowish brown throughout the entire body, and the number of caudal fin rays developed to thirty six perfectly.

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References

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