Environmental factors and recruitment of mackerel, Scomber scombrus L. 1758, along the north-east Atlantic coasts of Europe

被引:27
作者
Borja, A [1 ]
Uriarte, A [1 ]
Egaña, J [1 ]
机构
[1] AZTI, Pasaia 20110, Spain
关键词
mackerel; NAO; north-east Atlantic; recruitment; turbulent mixing; upwelling;
D O I
10.1046/j.1365-2419.2002.00190.x
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
Increasingly, scientific publications refer to some of the environmental factors affecting the recruitment in fish species. However, presently, there is little information available concerning the influence of the environment on the recruitment of Scomber scombrus, the North-east Atlantic mackerel (NEAM). In this contribution, North Atlantic Oscillation (NAO), upwelling and turbulent mixing (or 'turbulence') series were compared with recruitment estimates at age-0. The results show that the southern prespawning migration pattern of the Atlantic mackerel is directed towards, areas with low turbulent mixing at spawning time, providing a 'stable environment' for and larval survival. In the southern areas, where the spawning starts, the turbulence conditions of prespawning and spawning periods have the largest influence on the success of recruitment this is related, possibly, to the more 'stable' weather in the subsequent months and for the remainder of the year. In contrast, in the northern areas, the role of turbulence over the entire year becomes increasingly more relevant; this is related, possibly, to the high levels of turbulence during autumn and winter, which may become limiting to the survival of juveniles. About 50% Of the variability in the Atlantic mackerel recruitment may he explained by means of environmental variables, such as turbulence. Other variabless such as upwetting and NAO, are only slightly, or not, statistically significant.
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页码:116 / 127
页数:12
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