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首页> 外文期刊>ICES Journal of Marine Science >Trends in age-at-recruitment and juvenile growth of cuttlefish, Sepia officinalis, from the English Channel
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Trends in age-at-recruitment and juvenile growth of cuttlefish, Sepia officinalis, from the English Channel

机译：英吉利海峡乌贼墨鱼的应聘年龄和少年生长趋势

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摘要

The cuttlefish Sepia officinalis is an important fishery resource in the English Channel, and one of the largest stocks of cephalopods in the Northeast Atlantic. Cuttlefish live for approximately 2 years and catches consequently depend largely on recruitment. Early life stages were analysed for differences in juvenile growth and age-at-recruitment to the commercial fisheries. Recruits were sampled monthly between October 2000 and June 2003, and pre-recruits from the coastal waters of the UK and France in the summers of 2000 and 2002. Age (days) was determined from statoliths. Although most cuttlefish were recruited during autumn, there was some recruitment throughout the year. Age-at-recruitment varied significantly between season and cohort, but was consistently in the range 3-4 months, so although there was some hatching throughout the year, most cuttlefish hatched during summer. Fitted growth models indicated that the growth rates of pre-recruits (7-59 mm mantle length) were significantly higher in 2002 than in 2000. Spatial differences in growth rate were apparent in 2000, suggesting that pre-recruit growth may depend on local environmental conditions. Pre-recruits and recruits combined (7-106 mm mantle length) also showed significant variation in growth between hatching months and years. Hypotheses explaining the observed patterns of growth and recruitment are presented.
机译：墨鱼乌贼墨（Sepia officinalis）是英吉利海峡的重要渔业资源，也是东北大西洋最大的头足类种群之一。墨鱼的寿命约为2年，因此捕捞很大程度上取决于招募。对生命早期阶段进行了分析，以了解其在商业渔业中的幼年生长和征聘年龄的差异。在2000年10月至2003年6月之间每月对新兵进行采样，并在2000年和2002年夏季从英国和法国的沿海水域对新兵进行预征。年龄（天）由石笋确定。尽管大多数墨鱼是在秋季招募的，但全年都有一些招募。招聘年龄在各季节和同类人群之间有很大差异，但始终在3-4个月之间，因此尽管全年都有孵化，但大多数墨鱼在夏季孵化。拟合的增长模型表明，2002年招募前人员的增长率（2000年显着高于2000年）。2000年增长率的空间差异很明显，这表明招募前人员的增长可能取决于当地环境条件。预招募人员和新兵（7-16毫米地幔长度）的组合在孵化的月份和年份之间也显示出明显的增长差异。假设解释了观察到的增长和补充模式。

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