The reproductive biology of 385 male and 373 female slender smoothhounds,Gollum attenuatus, collected from New Zealand waters was examined. Size at maturity for both sexes was about 700 mm TL. Litter size was usually two. The sex ratio of embryos was 1:1. The right ovary ovulated 50–100 ova, 4–8 mm in diameter, and 30–80 ova were enclosed in each egg capsule. Only one embryo developed from the many ova in each egg capsule, the other undeveloped ova were ingested and passed to an external yolk sac which formed the yolk supply for the developing embryo.
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Yano, K. Reproductive biology of the slender smoothhound,Gollum attenuatus, collected from New Zealand waters. Environ Biol Fish 38, 59–71 (1993). https://doi.org/10.1007/BF00842904
- Size at maturity
- Sex ratio
- Litter size