Abstract
Survival of pike broodstock was evaluated 2–3 months after reproduction during two spawning seasons. In females, the highest survival rates (79–85%) were recorded following managed natural spawning. Spontaneously ovulated females submitted to ova collection by hand stripping had intermediate survival rates (32–45%). Low survival (20–21%) was observed in females subjected to gonadotropic treatment, captivity between hormone administration and ovulation, and ova collection. Survival of males was significantly higher after natural spawning (52–62%) than following a single sperm collection (5–7%). In both sexes, survival was clearly influenced by the degree of handling or environmental change experienced. A peak in mortality of broodstock used for artificial reproduction occurred in April and was concomitant with a sharp increase in water temperature.
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