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| Timohina, O.I.; Romanov, E.V.. |
| Based on histological analysis of gonads taken from 616 specimens of skipjack tuna (Katsuwonus pelamis) in the western part of the equatorial Indian Ocean, a thorough description of all stages of maturity and cells is given at different stages of ovogenesis. Different phases of cell development were defined for each stage, and size of cells is given. A comparison of visual and histological determinations of maturity stages is made. Fish sizes and ages at which mass maturation is observed, sex ratio and its variation for different size groups in the area studied are suggested. Mass onset of maturity (50%) is observed when females reach 43 cm and males 40 cm in length and 1.5 years of age. Assessment of portioned fecundity is given. The spawning period of... |
| Tipo: Proceedings Paper |
Palavras-chave: Sexual reproduction Oogenesis Sexual maturity ISW; West Indian Ocean Euthynnus pelamis Spawning Developmental stages. |
| Ano: 1996 |
URL: http://hdl.handle.net/1834/19 |
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