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KMID : 0613820100200111662
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Journal of Life Science
2010 Volume.20 No. 11 p.1662 ~ p.1666
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Effect of Water Temperature on the Growth of Triops longicaudatus (LeConte) (Notostraca: Triopsidae)
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Kwon Soon-Jik
Jun Yung-chul
Park Jae-Heung
Won Du-Hee
Seo Eul-Won
Lee Jong-Eun
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Abstract
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Growth and other biological processes in aquatic organisms are particularly dependent on water temperatures. This study examined the effects of water temperature on the growth of Triops longicaudatus. The influence of water temperature fluctuations was that growth rate was increased at higher temperatures. The mean carapace length was 5.7 (±2.1) ㎜ in a water temperature of 2 0℃ and 7.5 (±0.5) ㎜ in a water temperature of 28℃ on the 14th day after submergence. It was 6.9 (±2.8) ㎜ in a water temperature of 20℃ and 7.8 (±2.0) ㎜ in a water temperature of 28℃ on the 21st day after submergence. The mean carapace length grew rapidly within 14 days after submergence, but increase in carapace length beyond this time was slow. The influence of water depth fluctuations was low as the mean carapace length was 9.3 (±2.1) ㎜ under a water depth of 80 ㎜ and 9.5 (±1.3) ㎜ under a water depth of 190 ㎜ on the 19th day after submergence. Biomass showed that the carapace length of 5, 10, 16 and 20 ㎜ was a dry-weight of 1.1 (±0.3), 18.0 (±3.7), 26.0 (±0.0) and 52.3 (±4.0) ㎎ respectively. The number of eggs increased rapidly with increments in carapace length. The mean number of eggs was 20 (±0.0) at a carapace length of 7.0 ㎜, but at a carapace length of 17.0 ㎜, the mean number of eggs was 560 (±0.0). The results suggested that differences in water temperature accounted for the differences in length of the carapace and the number of eggs.
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KEYWORD
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Carapace length, growth rate, Triops longicaudatus, water temperature
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