Effects of temperature and salinity on egg hatch of the ayu Plecoglossus altivelis

概要

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Responses of eggs of the ayu Plecoglossus altivelis to series of temperature and salinity combinations were measured for percents of total and viable hatch and time to 50% hatch. Hatch occurred at almost all tested combinations of temperature range of 11.0 to 26.0℃ and chlorinity range of 0 to 8.0‰. Response surface analysis suggests that the maximum percents of total and viable hatch (i.e.,optimum) may be found at 19.0℃ combined with 0.9-1.1‰.　Time required to 50% hatch varied 6.5 and 26.2 days after fertilization,and was inversely and exponentially related to temperature.The Q10 value was higher at the lower temperature. The effect of chlorinity on the time was satistically insignificant within the hatchable range of eggs.
三重大学水産学部の論文
1986-11-15