Effect of light and temperature on the development of turbot eggs (Scophthalmus maximus L.)

Different experiments were done to determine the effects of light and temperature on the embryonic development of turbot eggs (Scophthalmus maximus L.) obtained in captivity. No significant differences were found between time elapsed from fertilization to hatching in the trials carried out with 24 h of light and those done in dark conditions. Light is not therefore a determining factor in the embryonic development of turbot eggs. The relation between temperature and time needed to reach each embryonic stage shows a clear inverse relationship. The exponential-potential equation which relates temperature (T) and age of the eggs (Y), defined as the time in hours elapsed since fertilization, is: Y = 27.64 x e^{-0.11T + 0.05i}; r = 0.9904, where i is the egg development stage (1 to 10). From the application of this equation, this paper also provides the development curves for each embryonic stage for each experimental temperature (in the range 10°C to 20°C).

Article from Marine Science Symposia Vol. 201 - "Mass rearing of juvenile fish". Symposium held in Bergen, 21-23 June 1993. To access the remaining articles please click on the keyword "MSS Vol. 201".