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Rate of food evacuation in roach ( Rutilus rutilus ) in relation to temperature, and the application of evacuation rate estimates for studies on the rate of food consumption
Author(s) -
PERSSON LENNART
Publication year - 1982
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.1365-2427.1982.tb00615.x
Subject(s) - rutilus , food consumption , fish <actinopterygii> , ecology , range (aeronautics) , biology , exponential function , daphnia , environmental science , toxicology , mathematics , fishery , zooplankton , economics , mathematical analysis , materials science , agricultural economics , composite material
SUMMARY. Food evacuation in roach (total body length, range 75–150 mm) was studied at temperatures between 4.2 and 24.0 °C. The rate of food evacuation was described by an exponential function and was similar for two different food items ( Daphnia and Chaoborus ). The relation between the instantaneous rate of food evacuation ( R ) and temperature was also described by an exponential function. A model developed for estimating food consumption rates in fish was tested in a simulation experiment and there was good agreement between estimated and actual values for food consumption.