Reproductive characteristics of the bathyal viviparous fish Cataetyx alleni (Osteichthyes: Bythitidae) from the southeastern Sardinian Sea (central-western Mediterranean) MARIA
作者： Maria Cristina Follesa , Cristina Porcu , Antonello Mulas , Susanna Salvador , Angelo Cau
DOI: 10.3989/SCIMAR.2011.75N2391
关键词: Fish <Actinopterygii> 、 Reproductive biology 、 Zoology 、 Internal fertilization 、 Cataetyx 、 Spermatophore 、 Ecology 、 Mediterranean climate 、 Bathyal zone 、 Biology 、 Gonad
摘要: The reproductive biology of the bathyal viviparous fish Cataetyx alleni was described based on 34 specimens (17 females and 17 males) caught during experimental trawl surveys carried out between 800 1700 m depth in southeastern Sardinian Sea (central-western Mediterranean). Males were present at similar size intervals. For first time, internal fertilization demonstrated by finding free spermatozoa scattered ovarian cavity. Based macroscopic histological gonad analysis, mature found summer, autumn winter, suggesting a long period. Inseminated observed only November January, correspondence with higher maturity males. These results suggest probable peak copulation autumn-winter. Moreover, examination that ovaries this member family Bythitidae had ‘group-synchronous’ pattern. No spermatophores males embryos sections analysed.
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