Copepod production drives recruitment in a marine fish
Copepod production drives recruitment in a marine fish
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DOI：
10.1139/f08-126
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发表时间：
2008-08-01
影响因子：
2.4
通讯作者：
Fortier, Louis
中科院分区：
文献类型：
--
作者：
Castonguay, Martin;Plourde, Stephane;Fortier, Louis
预测商业海鱼捕捞的波动仍然是渔业科学的圣杯。在之前的研究中，我们确定了大西洋鲭鱼（Scomber scombrus）的繁殖与区域气候、浮游动物生物量和桡足类鹦鹉螺（copepod nauplii）产量在十多年（1982-1991）之间的统计关系，其中包括1982年异常强劲的年份。在这里，我们通过增加第二个十年（1992-2003）的观察来检验这些关系的有效性，其中包括1999年的另一个特殊年份。我们提供了第一个基于实地的证据，将海洋中浮游生物猎物的可用性与幼鱼的早期生长和商业开发的海洋鱼类的年级强度联系起来。招募在很大程度上依赖于为鲭鱼幼虫提供食物的桡足类鹦鹉螺的生产。这两个强劲的年度班级的特点是这些特定猎物的可获得性异常高。我们认为，根据浮游生物生命最初几周的猎物可用性，可以提前3年预测鲭鱼的招募，并预测2006年孵化的鱼类将有一个强劲的年度班级。
Predicting fluctuations in recruitment of commercial marine fish remains the Holy Grail of fisheries science. In previous Studies, we identified statistical relationships linking Atlantic mackerel (Scomber scombrus) recruitment to regional climate, zooplankton biomass, and the production of copepod nauplii over a decade (1982-1991) that included the exceptionally strong year class of 1982. Here we tested the validity of these relationships by adding a second decade (1992-2003) of observations that includes another exceptional year class in 1999. We provide the first field-based evidence linking availability of plankton prey in the sea to early growth of larval fish and to year-class strength in a commercially exploited marine fish. Recruitment is shown to strongly depend on production of the copepod nauplii species that contribute to the diet of mackerel larvae. Both strong year classes were characterized by exceptionally high availability of these specific prey. We suggest that mackerel recruitment can be anticipated 3 years in advance based on prey availability during the first weeks of planktonic life and predict a strong year class for fish hatched in 2006.