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首页> 外文期刊>Marine Biology: International Journal on Life in Oceans and Coastal Waters >Reproductive behavior and alternative reproductive strategy in the deep-sea snailfish, Careproctus pellucidus
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Reproductive behavior and alternative reproductive strategy in the deep-sea snailfish, Careproctus pellucidus

机译：Reproductive behavior and alternative reproductive strategy in the deep-sea snailfish, Careproctus pellucidus

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摘要

The reproductive biology of deep-sea fishes is largely unknown because of the difficulty of behavioral observations in this environment. In this study, the reproductive behavior of the deep-sea snailfish, Careproctus pellucidus, which lives at depths 200 m, was observed in an aquarium. Fishes were collected at a depth of approximately 300 m in the North Pacific Ocean (36 degrees 70'N; 141 degrees 00'E) in July and August 2018 and kept for observation until March 2019. We observed that spawning events usually took place between one male and one female. Males defended a spawning substrate against other males and exhibited body-wiggling behavior for both courtship and aggressive display. Females visited the male's territory and spawned a demersal adhesive egg mass on the substrate. The territorial male then sought the spawned eggs using the filamentous rays in the lower pectoral-fin lobe and released sperm when he located the eggs. Males remained near the spawning substrate after spawning but did not perform any parental care. Notably, sneaking behavior by a non-territorial male was observed in one case; this is the first report of this alternative reproductive strategy (or tactic) in a deep-sea fish. Our study reveals the spawning of C. pellucidus appear to use the mechanosensory lateral line and the chemical sense heavily to adapt to the dim sunlight deep-sea environment.

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