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Effect of population density and feeding rate on the fathead minnow ( Pimephales promelas )
Author(s) -
Smith Helen T.,
Schreck Carl B.,
Maughan O. Eugene
Publication year - 1978
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.1095-8649.1978.tb04188.x
Subject(s) - pimephales promelas , minnow , biology , fecundity , cyprinidae , population , population density , juvenile , juvenile fish , zoology , sex ratio , fish <actinopterygii> , fishery , ecology , demography , sociology
Juvenile fathead minnows ( Pimephales promelas ) were stocked in tanks at different densities and different ration levels, in two experiments, to determine effects on final population density, growth and fecundity. Length and weight of fish increased with increased food availability. Egg size was exponentially related to growth and perhaps directly to ration level. High population density appeared to limit growth and gamete development regardless of food abundance. Additionally, water volume appeared to limit numbers (tolerance density) of fish which can be supported in a specific volume of water.