The Korean Journal of Malacology (한국패류학회지)

The Malacological Society of Korea (한국패류학회)
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Effect of water temperature on embryonic development and larval survival of an intertidal snail, Nassarius festivus (Powys, 1835)

  • Kang, Sin-Kil (Environmental Health & Safety Research Institute, EH R&C Co. Ltd.) ;
  • Sung, Chan-Gyoung (Environmental Health & Safety Research Institute, EH R&C Co. Ltd.) ;
  • Chung, Jiwoong (Environmental Health & Safety Research Institute, EH R&C Co. Ltd.) ;
  • Park, Dong-Ho (Environmental Health & Safety Research Institute, EH R&C Co. Ltd.) ;
  • Lee, Jong-Hyeon (Environmental Health & Safety Research Institute, EH R&C Co. Ltd.) ;
  • Lee, Chang-Hoon (Environmental Health & Safety Research Institute, EH R&C Co. Ltd.)
  • Received : 2016.03.07
  • Accepted : 2016.03.31
  • Published : 2016.03.31
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Abstract

This study was carried out to determine the optimal water temperature for the embryonic development and laboratory culture of larvae of an intertidal mud snail, Nassarius festivus. The embryos and hatched veliger larvae of N. festivus were incubated at six different temperatures (5, 10, 15, 20, 25 and $30^{\circ}C$). Developmental time for each stage decreased as water temperature increased. The elapsed time to develop to the veliger larva at 15, 20, 25 and $30^{\circ}C$ was 559, 155, 131 and 103 hrs, respectively. At 5 and $10^{\circ}C$, embryo developed to veliger larvae but failed to hatch out of the egg capsule. In contrast, all embryos successfully hatched in the temperature range from 15 to $30^{\circ}C$. The biological minimum temperature during the embryonic development of N. festivus was estimated to be $9.5{\pm}0.4^{\circ}C$. The cumulative water temperatures for blastula, gastrula and veliger stages were calculated as $111{\pm}84$, $486{\pm}185$, $1,164{\pm}72^{\circ}C$, respectively. Temperature also affected the larval survival. Five days after hatching, more than 84% of larvae survived at all experimental temperatures. However, survival began to decrease after 6 days. It was 0% at $30^{\circ}C$. Survival of larvae incubated for 8 days was higher at 15 and $20^{\circ}C$ than other experimental temperatures. We therefore suggest that the optimal range of temperature for embryonic development and larval survival of N. festivus is $15-20^{\circ}C$.

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References

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