Amphipod Amplexus, The Significance of Ecotypic Variation
1973
Strong, Donald R., Jr
The proportion of the female molt cycle spent in amplexus varies inheritably among several populations of the talitrid amphipod Hyalella azteca. Duration of amplexus is negatively correlated with an index of the intensity of predation by visually orienting fish. As amplexus renders the amphipods more vulnerable to these fish, I hypothesize that this type of predation selects for an abbreviation selects for an abbreviation of the amplexed phased of the female molt cycle.
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