Vertical distribution of Baltic sprat larvae: changes in patterns of diel migration?

被引：22

作者：

Voss, Ruediger ^{[1
]}

Schmidt, Joern O. ^{[1
]}

Schnack, Dietrich ^{[1
]}

机构：

[1] Leibniz Inst Marine Sci, D-24105 Kiel, Germany

来源：

ICES JOURNAL OF MARINE SCIENCE | 2007年 / 64卷 / 05期

关键词：

Baltic Sea; behavioural change; diel migration; prey availability; sprat larvae; vertical distribution; SOUTHEASTERN HUDSON-BAY; MARINE FISH LARVAE; COD GADUS-MORHUA; BORNHOLM BASIN; SPATIOTEMPORAL DISTRIBUTION; FOOD-CONSUMPTION; CLUPEA-HARENGUS; FEEDING-HABITS; GEORGES BANK; NORTH-SEA;

D O I：

10.1093/icesjms/fsm068

中图分类号：

S9 [水产、渔业];

学科分类号：

0908 ;

摘要：

Ontogenetic and diurnal vertical migration patterns of Baltic sprat larvae were investigated for the periods 1989-1990 and 1998-2002. Comparison of the results led to the hypothesis that the diel vertical migration behaviour of sprat larvae >10 mm has changed. In 1989 and 1990, sprat larvae migrated to the surface at night, whereas they stayed 30-50 m deep by day. From 1998 to 2002, sprat larvae showed no signs of diel vertical migration, remaining in warmer, near-surface water by day and night. This behavioural change coincided with a more general change in the Baltic ecosystem, i.e. an increase in near-surface temperature and a general increase in abundance of the major prey organism (Acartia spp.) of Baltic sprat larvae, with more pronounced aggregation in surface waters.

引用

页码：956 / 962

页数：7

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