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Effect of group size on feed intake, growth and feed efficiency of juvenile perch
Author(s) -
Strand Å.,
Alanärä A.,
Magnhagen C.
Publication year - 2007
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2007.01497.x
Subject(s) - biology , perch , juvenile , feed conversion ratio , fish <actinopterygii> , fishery , zoology , shoaling and schooling , aquaculture , body weight , ecology , endocrinology
Feed intake, growth and feed efficiency of juvenile perch Perca fluviatilis were significantly affected by group size, with fish in groups of 12 having lower feed intake, higher growth and higher feed efficiency than solitary individuals. The same trend was seen for fish in groups of 12 compared to fish in groups of four, and for fish in groups of four compared to solitary individuals, although the differences were not always significant. The high growth and low feed efficiency for fish in groups may be caused by benefits obtained from shoaling such as reduced levels of stress.