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KMID : 0894520090130040265
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Development & Reproduction
2009 Volume.13 No. 4 p.265 ~ p.270
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Effect of Water Temperature on the Embryonic Development of Slime Flounder Microstomus achne
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Byun Sun-Gyu
Lee Sung-Hun
Hwang Jae-Ho
Han Kyeong-Ho
Yeon In-Ho
Kim Jin-Do
Lee Jong-Ha
Lee Bae-Ik
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Abstract
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The fertilized eggs were obtained from mature adult slime flounder Microstomus achne to determine the water temperature effect on egg development. The lowest water temperature for the flounder egg development was 0.4℃ on average. The temperature-dependent duration from fertilization to hatching ranged 86.5 to 296.7 hours at 9~21℃ with an accelerated development at higher temperature. Agreeable hatching rates, 95.8~97.0%, were obtained at 12~18℃, while lower at both extremes, 86.9% at 9℃ and 9.3% at 21℃. The highest water temperature, 24℃, had the life of the fertilized eggs confined within 24 hours. Water temperature was a parameter that induced an abnormal egg development: with abnormalities of 88.3% at 21℃, 2.1% at 9℃ (P＜0.05), and 0.4~0.8% at 12~18℃.
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KEYWORD
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Microstomus achne, Temperature, Egg development
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