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Effect of gut content on the vulnerability of copepods to visual predation
Author(s) -
Tsuda Atsushi,
Saito Hiroaki,
Hirose Taro
Publication year - 1999
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1999.44.4.1175
Subject(s) - limnology , citation , vulnerability (computing) , predation , information retrieval , food science , computer science , history , library science , ecology , biology , computer security
We carried out feeding experiments in natural light using copepods (Acartia and Pseudocalanus) and visual orienting predators (herring larvae and salmon fry) to determine whether feeding copepods are more vulnerable to predation than nonfeeding copepods. The fish fed on copepods with full guts at a significantly higher rates. This observation suggest that nocturnal feeding without migration may sometimes be an advantageous strategy for copepods, making a trade-off between the metabolic disadvantages of starvation during the day with decreased mortality.