Open AccessEffects of Environmental Factors on Egg Development and Hatching of Pacific Halibut Hippoglossus stenolepis
Author(s) -
Liu Han Wu,
Stickney Robert R.,
Dickhoff Walton W.,
McCaughran Donald A.
Publication year - 1994
Publication title -
journal of the world aquaculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0893-8849
DOI - 10.1111/j.1749-7345.1994.tb00197.x
Subject(s) - halibut , hatching , biology , human fertilization , hippoglossus hippoglossus , incubation , zoology , larva , light intensity , salinity , fishery , ecology , anatomy , fish <actinopterygii> , biochemistry , physics , optics
Eggs of Pacific halibut were incubated under various environmental conditions. Optimum hatching occurred over a temperature range from 6 C to 8 C, whereas temperatures of 3, 10, and 11 C were lethal. Development time from fertilization to 50% hatching varied from 250 h (9 C) to 320 h (6.5 C). Salinity effects on hatching were not as critical as temperature, as long as eggs were floating during the incubation period. Light intensity between 5 and 15 lux did not affect hatching success, but high light intensity (15 lux) and red and blue light (5 lux) produced high levels of larval abnormality. Simulated transport of unfertilized eggs indicated that the eggs can be safely moved and that fertilization rate is acceptable during the first 12 h after collection.