The objective was to investigate effects of short term temperature rises on the hatching success of stone flounder Kareius bicoloratus, eggs. Termal treatments were carried out by transferring eggs from the base temperature seawater (10°C) into a beaker containing seawater at an elevated temperature of 4, 8, 12, 16 or 22°C above the base temperature, and by maintaining the eggs at the elevated temperature for 0.7, 2.5, 10, 40, 160min or until hatching. Eggs during 8-16 Cell, Eye Forming and Beginning of Heart Beat stages were found to be more susceptible to thermal treatments than those during Morula, Embryo Encircling two thirds of the Egg Membrane and Just Before Hatching. Beginning of Heart Beat stage was presumed to be the most susceptible out of the six stages tested. Median resistance times (exposure duration to 50% mortality of the control) of eggs during Beginning of Heart Beat stage were estimated as follows: ΔT=22°C- less than 0.7min, ΔT=16°C-4min, ΔT=12°C-58min, ΔT=8°C-680min.
- Nippon Suisan Gakkaishi is an official journal of the Japanese Society of Fisheries Science written in Japanese only.
The society publishes an English journal, Fisheries Science, as well, which accepts submissions from non-members of the society over the world. Detailed information is available in http://jsfs.jp/en/journals/fisheries-science.