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Effects of Water Temperature, Stocking Density and Feeding Frequency on Survival and Growth in the Oblong Rockfish Sebastes oblongus Larvae  

Yoon, Seong Jong (South sea regional fisheries institute, NFRDI)
Kim, Dae Hyun (South sea regional fisheries institute, NFRDI)
Hwang, Hyung Gue (South sea regional fisheries institute, NFRDI)
Song, Gi Chul (West sea regional fisheries institute, NFRDI)
Kim, Young-Chul (Department of Aquaculture, Pukyong National University)
Publication Information
Korean Journal of Ichthyology / v.19, no.2, 2007 , pp. 154-159 More about this Journal
Abstract
The oblong rockfish, Sebastes oblongus has recently drawn attention from aquaculturists because of its marketable value and tolerance against winter water temperature in the southern coastal waters of the Korean peninsula. In the study of temperature effect on growth, water temperature $16^{\circ}C$ showed best growth. The upper temperature of the fish showed feeding activity was $27^{\circ}C$ over which the fish showed no longer feeding activity. Stocking density was also a critical factor affecting the growth and survival of the juvenile fish. The best growth was in the density of 200 juveniles/L, while the highest survival was in the density of 100 juveniles/L. A feeding experiment was conducted to determine the effects of feeding frequency on growth and survival. A feeding scheme of twice a day was good enough in the sense of growth, survival, and economy. These results indicate that parameters such as water temperature, density, tank size and feeding frequency are consideration for best seed production of the fish.
Keywords
Sebastes oblongus; water temperature; rearing density; feeding frequency;
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Times Cited By KSCI : 1  (Citation Analysis)
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