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THE INFLUENCE OF PREDATION ON THE ADULT SEX RATIOS OF TWO COPEPOD SPECIES 1
Author(s) -
Maly Edward J.
Publication year - 1970
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.1970.15.4.0566
Subject(s) - predation , copepod , biology , predator , zoology , ecology , sex ratio , crustacean , population , demography , sociology
Males and females of two species of copepods were subjected to predation by three different predators in a laboratory environment. Ambystoma tigrinum tadpoles ate more female than male Diaptomus shoshone, Lebistes reticulatus ate more male than female Diaptomus oregonensis, and Hydra cauliculata ate equal numbers of male and female D. oregonensis in a given length of time. Predation alters the adult sex ratios of these prey in the laboratory in a manner influenced by differences in predator hunting behavior and by differences in size and activity of male and female prey. Predictions concerning adult prey sex ratios in natural conditions are discussed.