The influence of fluctuating above-optimal temperature regimes on the fecundity of Biomphalaria pfeifferi (Mollusca: Planorbidae).


Biomphalaria pfeifferi of different sizes were subjected to fluctuating temperature regimes incorporating quantities of above-optimal heat ranging from approximately 2 to 75 degree hours greater than 27 degrees C per day. Fecundity over this range was found to be similar from 2 to 45 deg.h. greater than 27 degrees C/day but above this level egg production… (More)


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