Open AccessCONTROLLED SPAWNING OF F 1 HYBRID STRIPED BASS ( Morone saxatilis X M. chrysops ) AND REARING OF F 2 PROGENY 1
Author(s) -
Smith Theodore I. J.,
Jenkins Wallace E.
Publication year - 1984
Publication title -
journal of the world mariculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0735-0147
DOI - 10.1111/j.1749-7345.1984.tb00148.x
Subject(s) - biology , spawn (biology) , morone , zoology , bass (fish) , juvenile , fishery , larva , morone saxatilis , photoperiodism , serranidae , fecundity , hybrid , ecology , fish <actinopterygii> , botany , population , demography , sociology
F 1 hybrid bass (striped bass female x white bass male) were matured under controlled photoperiod and temperature regimes. These fish were spawned, using human chorionic gonadotropin (HCG), about 3 months earlier than normally occurs for striped bass in South Carolina. This was accomplished by compressing the natural annual cycle to 9 months. Under controlled conditions, fish previously spawned were reconditioned and respawned in 9 months. When injected with HCG, paired male and female F 1 hybrids were able to spawn in tanks. Hatch rate was low (10%) in the F 1 x F 1 cross. Further, the F 2 larvae exhibited a high degree of growth variation and cannibalism which is common among striped bass larvae. Larval F 2 hybrids, stocked at an initial density of 73,510 fish/m 3 , grew to a mean size of 41.9 mm TL (range 32.0–52.0 mm) in 46 days. Juvenile F 2 hybrids, mean weight 12.8 g, were stocked in a controlled recirculating water system at a density of 31/m 3 . During 189 days, these fish grew to a mean size of 222 g and exhibited a survival of 92.5%.