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首页> 外文期刊>ICES Journal of Marine Science >Fecundity regulation in horse mackerel
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Fecundity regulation in horse mackerel

机译：竹荚鱼的产卵调节

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摘要

Egg production methods have been used successfully in the provision of advice for fisheries management. These methods need accurate and unbiased estimates of fecundity. We explore the reproductive strategy of horse mackerel and estimation of fecundity. Fecundity and fecundity regulation in relation to condition was investigated over a number of years. Fulton's K, lipid content, and hepatosomatic index increased after the start of spawning, though decreased again at the end of spawning. The increase in the gonadosomatic index, fecundity, and body condition after the onset of spawning suggests that horse mackerel utilizes food resources during the spawning season and might be an income breeder. However, the decline in K and lipid before the spawning season suggests that the first batch of oocytes is developed on stored energy. Fecundity varied between years and within a spawning season. Over latitude, variations in fecundity were small. K and lipid content are not reliable indices as proxy for fecundity. Batch fecundity appears to be heterogeneous across the spawning season but homogeneous across latitude. The homogeneity of batch fecundity over latitude could indicate that the daily egg production method is an appropriate approach for estimating the abundance of a wide ranging species, as horse mackerel.
机译：产蛋方法已成功用于提供渔业管理建议。这些方法需要准确无偏的生育力估计。我们探索竹荚鱼的繁殖策略和繁殖力的估计。多年来研究了与状况有关的生殖力和生殖力调节。产卵开始后，富尔顿的钾，脂质含量和肝体指数增加，但产卵结束时又下降。产卵后性腺躯体指数，生殖力和身体状况的增加表明，鲭鱼在产卵季节利用了食物资源，可能是一种收入繁殖者。然而，产卵季节之前钾和脂质的下降表明第一批卵母细胞是利用储存的能量发育的。繁殖力在数年之间和产卵季节内变化。在纬度上，繁殖力的变化很小。钾和脂质含量不是生育力的可靠指标。整个繁殖期的繁殖力似乎是异质的，而在纬度上则是均匀的。批次繁殖力在纬度上的均匀性可能表明，每天的产卵方法是一种合适的方法，可用来估计各种种类的鱼类（如鲭鱼）的丰度。

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