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Effect of food acclimation on assimilation efficiency of Calanus pacificus 1
Author(s) -
Landry M. R.,
Hassett R. P.,
Fagerness V.,
Downs J.,
Lorenzen C. J.
Publication year - 1984
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.1984.29.2.0361
Subject(s) - assimilation (phonology) , zooplankton , thalassiosira weissflogii , biology , acclimatization , copepod , calanus , ecology , phytoplankton , crustacean , nutrient , philosophy , linguistics
A technique, based on quantitative conversion of chlorophyll a to pheophorbide during digestion, is described for determination of assimilation efficiencies of particle‐feeding zooplankton. Calanus pacificus had assimilation efficiencies ranging from 68.5 to 85.4% for carbon and 73.9 to 92.5% for nitrogen. Assimilation efficiencies for copepods first acclimated to different food concentrations of Thalassiosira weissflogii and then fed at the same food level varied systematically, with animals acclimated to low food having higher efficiencies than animals acclimated to high food.