Effects of temperature on development and survival of Todarodes pacificus embryos and paralarvae
Year: 1996
Type: article
Abstract: Embryonic development and survival of paralarvae of the Japanese common squid, Todarodes pacific us (Steenstrup, 1880), were examined at 16 temperatures (3-29°C) to determine the optimum temperature range for development and survival.Normal embryonic development occurred at temperatures between 14.0° and 26.0 0 e, with highest embryonic survival rates occurring between 14.r and 22.2°e.The relationship between temperature (T) and the number of days from artificial fertilization to hatching (D) is expressed by a polynomial function: In(D) = 4.73 -0.227(T) + 0.00304(T 2 ).A modified fonnula, based on observations of two egg masses spawned in captivity, was used to estimate the development rate of eggs within naturally spawned egg masses.It is suggested that T. pacificus spawns in waters warmer than 12.1°e, and egg masses maintain their structure for 4.0 -9.5 days before disintegrating at temperatures between 14.7° and 22.2°C.Paralarvae survived up to 13 days after hatching, with the highest survival rates occurring at 15°e.
Language: English
Domain: Life Sciences
SDG: Life below water
Open Access status: green
Funder: Hokkaido University
OpenAlex ID: W107235026