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Egg Development and Early Life History of the Endangered Korean Spine Loach, Iksookimia pumila (Pisces: Cobitidae)  

Ko, Myeong-Hun (Department of Life Sciences and Biotechnology, Soonchunhyang University)
Park, Sang-Yong (Department of Life Sciences and Biotechnology, Soonchunhyang University)
Bang, In-Chul (Department of Life Sciences and Biotechnology, Soonchunhyang University)
Publication Information
Korean Journal of Ichthyology / v.25, no.2, 2013 , pp. 65-73 More about this Journal
Abstract
Egg development and early life history of the Korean spine loach, Iksookimia pumila was investigated to provide basic information regarding biological characteristics and restoration. Adult fish were sampled using spoon net in the Baek Stream, Sangseo-myeon, Buan-gun, Jeollabuk-do, Korea, 7 July 2010. Eggs and sperms were obtained from the females and male with Ovaprim injecting (0.5 mL/kg) and then fertilized using the dry method in the laboratory. Number of spawned eggs were 1,107 (352~1,440). Spawned eggs were slightly adhesive, light yellowish coloring and measured $1.3{\pm}0.04$ mm (mean${\pm}$SD) in diameter. Spawned eggs hatched out 52 (47~55) hours after fertilization at water temperature of $23^{\circ}C$, and newly hatched larvae an average were $4.7{\pm}0.14$ mm in total length. At 5 days after hatching, larvae averaged $7.1{\pm}0.20$ mm in total length and their yolk sacs had been completely absorbed. Beginning at 17 days after hatching, fish entered the juvenile stage and reached $11.0{\pm}0.50$ mm in total length. At 100 days after hatching, the band patterns and external form of juvenile fish were similar to those of adults, and they averaged $31.3{\pm}3.98$ mm in total length.
Keywords
Iksookimia pumila; egg development; early life history; endangered species;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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