Timing of diapause in relation to the onset of winter in the high-latitude copepods Pseudocalanus acuspes and Acartia longiremis

被引:31
作者
Norrbin, MF
机构
[1] Norwegian College of Fishery Science, University of Tromsø, Breivika
关键词
dormancy; overwintering; life history;
D O I
10.3354/meps142099
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
It is proposed that the timing of overwintering diapause in multivoltine, marine copepods is optimised as in insects and limnic copepods. Theoretical models state that resting should begin a period equivalent to 1 generation before the environment becomes unfavourable. Computer simulations and field studies have shown this to apply to insects and limnic copepods. The present paper tests and discusses the model predictions in relation to seasonal environmental changes and life history events for populations of Pseudocalanus acuspes (Giesbrecht, 1881) and Acartia longiremis T. Lilljeborg in North Norwegian fjords. These copepods switch from developing populations, with normally developing gonads, to resting populations, with immature gonads, within a few weeks in early fall. Phytoplankton abundance and primary production decline later in the fall.
引用
收藏
页码:99 / 109
页数:11
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