Sexual maturation in captive spiny lobsters, Jasus edwardsii , and the relationship of fecundity and larval quality with maternal size

摘要: Reproductive and somatic parameters of southern rock lobsters, Jasus edwardsii, held captive since puerulus wild-caught adults were examined in terms size at onset maturity (SOM) fecundity, culminating an examination how adult may relate to larval competency. The SOM was much smaller animals (62.5 mm carapace length, CL) compared historical fishery data indicated that precocious maturation be induced captivity. During this study, the fecundity assessed as number viable phyllosoma hatch, which ~ 45% egg estimates from data, suggesting either declining numbers wild stocks over time or major loss occurs during embryonic development. association between sexual dimorphism for several morphometric parameters. In females, concomitant with increases width 1st 2nd abdominal segments above 62.5 CL, while 3rd leg length increased disproportionately males females 77.5 CL. There significant correlations female (r = 0.92), 0.74) viability quantified by stress indices -0.56) LD-50 0.56), indicating larger produce larger, more larvae. These physiological traits larval, juvenile have impact on aquaculture production.