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首页> 外文期刊>Estuarine Coastal and Shelf Science >The reproductive biology of a shallow water morid (Salilota australis GUEnther,1878), around the Falkland Islands
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The reproductive biology of a shallow water morid (Salilota australis GUEnther,1878), around the Falkland Islands

机译：福克兰群岛周围的浅水mo（Salilota australis GUEnther，1878）的生殖生物学

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摘要

The reproductive biology of a shelf morid, red cod {Salilota australis) was investigated in the Falkland Islands, in order to expand our knowledge of the reproductive strategy of this relatively unstudied family of fishes. Red cod spawn to the south and south-west of West Falkland between August and October. Length frequency and sex ratio data suggest that females arrive at the spawning grounds first. The greatest spawning activity occurred in early evening and this timing may be an adaptation to reduce predation on eggs. Ripe egg size varied from 0.95 to 1.26 mm and was not dependant on female size. There was no regulative atresia during maturation and the formation of fecundity and fecundity increased with increasing fish total length (L-T) from 300,000 (42-45 cm L-T) to 4.5-9.0 million eggs (75-83 cm L-T). The fecundity of most of the population was between 2 and 5 million eggs. Red cod releases small batches of eggs over the spawning period. Batch size ranged from 30,000-90,000 (39—42 cm L-T) in smaller animals to 400,000—800,000 (>75 cm L-T) in larger animals and the batch size of first spawners was significantly higher than for advanced spawners. The study allows us to discuss the evolutionary relationships between the Gadiformes.
机译：为了在福克兰群岛上研究一种陆架mo红色鳕鱼（Salilota australis）的繁殖生物学，以扩展我们对该相对未研究鱼类的繁殖策略的认识。在八月到十月之间，红色鳕鱼产于西福克兰的南部和西南部。体长频率和性别比数据表明雌性首先到达产卵场。最大的产卵活动发生在傍晚，这个时机可能是减少卵捕食的一种适应方法。成熟鸡蛋的大小从0.95到1.26毫米不等，与雌性大小无关。成熟期间没有调节性闭锁，并且随着鱼总长（L-T）从300,000（42-45 cm L-T）增加到4.5-9.0百万个卵（75-83 cm L-T），繁殖力和繁殖力增加。大多数人口的产卵量在2到500万个卵之间。红鳕鱼在产卵期释放少量卵。批量大小从小型动物的30,000-90,000（L-T的39-42厘米）到大型动物的400,000-800,000（L-T的> 75厘米），第一批产卵的批量明显高于高级产卵的批量。这项研究使我们能够讨论Gadiformes之间的进化关系。

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