INFLUENCE OF BENGUELA UPWELLING ON THE STRUCTURE OF DEMERSAL FISH POPULATIONS OFF NAMIBIA

被引：38

作者：

MASRIERA, J

LOMBARTE, A

GORDOA, A

MACPHERSON, E

机构：

[1] Instituto de Ciencias del Mar, Paseo Nacional s/n, Barcelona

来源：

MARINE BIOLOGY | 1990年 / 104卷 / 02期

关键词：

D O I：

10.1007/BF01313256

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

The effect of bottom-water dissolved oxygen on the structure of demersal fish communities off south Namibia was analized. Collections were made during two cruises of the zone in winter 1987 and summer 1988, i.e., before and after the intensive upwelling season. Multivariate analysis revealed four distinct associations, separated by latitude (ca 27°S) and depth (ca 300 m isobath), indicating that dissolved oxygen is an important factor affecting the distribution of demersal fish communities in the zone. Faunal diversity decreased in areas of low oxygen levels. The seasonal variation in upwelling reflected the extent of fish association, their composition, and the seasonal geographical displacement of their boundaries. © 1990 Springer-Verlag.

引用

页码：175 / 182

页数：8