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Egg Development and Early Life History of the Endangered Species, Microphysogobio rapidus (Cyprinidae)  

Hong, Yang-Ki (Department of Life Science and Biotechnology, Soonchunhyang University)
Ko, Myeong-Hun (Department of Life Science and Biotechnology, Soonchunhyang University)
Park, Sang-Yong (Department of Life Science and Biotechnology, Soonchunhyang University)
Bang, In-Chul (Department of Life Science and Biotechnology, Soonchunhyang University)
Publication Information
Korean Journal of Ichthyology / v.27, no.2, 2015 , pp. 86-94 More about this Journal
Abstract
Egg development and early life history of the endangered species, Microphysogobio rapidus was investigated to get a basic information for biological characteristics and recovery strategy. Eggs were obtained from females by injecting Ovaprim (0.5 mL/kg) and artificially fertilized by dry method in the laboratory. The mature eggs were slightly adhesive and separated with light bluish green and $0.63{\pm}0.02mm$ (n=20) in diameter. Number of eggs in the ovaries were $3,827{\pm}1,225$ (2,850 ~ 5,916). The hatching occurred at 72 hours after fertilization under water temperature of $21{\pm}1^{\circ}C$. The newly-hatched larvae were $2.79{\pm}0.04mm$ (n=10) in total length. At 5 days after hatching, they were average $4.10{\pm}0.07mm$ (n=10) in TL and their yolk sacs were completely absorbed. 30 days after hatching, they became to juvenile stage and reached $9.74{\pm}0.24mm$ (n=10) in TL. At 100 days after hatching, the band patterns and external form were similar to those of adults, average $27.00{\pm}1.94mm$ (n=10) in TL.
Keywords
Endangered species; Microphysogobio rapidus; egg development; early life history;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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