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Production of the three‐spined stickleback, Gasterosteus aculeatus L., in the River Weaver, England
Author(s) -
O'HARA K.,
PENCZAK T.
Publication year - 1987
Publication title -
freshwater biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 156
eISSN - 1365-2427
pISSN - 0046-5070
DOI - 10.1111/j.1365-2427.1987.tb01319.x
Subject(s) - gasterosteus , three spined stickleback , stickleback , channelized , fish <actinopterygii> , biology , ecology , population , fishery , telecommunications , demography , sociology , computer science
1. The production of three‐spined sticklebacks, Gasterosteus aculeatus , estimated in the margin of a large channelized lowland river, averaged 42.3 g m −2 yr −1 and the P/B ratio was 3.7. The production value greatly exceeds those previously recorded for G. aculeatus and results from the very high population densities. 2. Life‐bistory tactics of the sticklebacks included both r‐ and K‐selected traits. 3. The fish were carnivorous in the summer months but predominantly detritivorous in the winter.