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Development of Eggs and Early Life History of Iksookimia longicorpa (Pisces: Cobitidae) from Nakdong River of Korea  

Ko, Myeong-Hun (Faculty of Biological Science and Institute for Biodiversity Research, College of Natural Science, Chonbuk National University)
Park, Jong-Young (Faculty of Biological Science and Institute for Biodiversity Research, College of Natural Science, Chonbuk National University)
Kim, Ik-Soo (Faculty of Biological Science and Institute for Biodiversity Research, College of Natural Science, Chonbuk National University)
Publication Information
Korean Journal of Ichthyology / v.21, no.1, 2009 , pp. 15-22 More about this Journal
Abstract
An artificial breeding method was carried out to investigate development of eggs and the early life history of Iksookimia longicorpa. The eggs of the female were obtained by injecting gonadotropin (LHRH) and fertilizingby the dry method in the laboratory. The mature eggs were separate, demersal, light yellowish, and averaged $1.53{\pm}0.07mm$ in diameter. In water temperature of $23{\sim}25^{\circ}C$, the eggs hatched in 50~72 hours after fertilization, and their lengths reached $5.1{\pm}0.23mm$ in total length. On Day 4 after hatching, they averaged $7.1{\pm}0.47mm$ in total length and their yolk sacs were completely absorbed. From 25 days after hatching, they attained a juvenile stage reaching $12.8{\pm}0.49mm$ in total length. On the 100th dayafter hatching, their band patterns and external form were similar to those of adults, and they averaged $38.5{\pm}2.95mm$ in total length.
Keywords
Iksookimia longicorpa; egg development; early life history;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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