Comparative Life History Tactics of the Sphaeriid Clam, Musculium partumeium (Say), from a Permanent and a Temporary Pond
The American Midland Naturalist
A population of the sphaeriid clam, Musculium partumeium, in an ephemeral pond, exhibits a semelparous univoltine life cycle (life-span 13 months) The population in a permanent pond has an interoparous bivoltine life cycle (life-spans of both generations 13 months). Both populations exhibit a Type III survivorship curve. Population differences are discussed in terms of life history tactics. Clams in the permanent pond mimic the life-cycle pattern of the population in the temporary pond by exhibiting "dormancy" over the summer when the ephemeral pond is dry. For the population of the permanent pond, neither temperature, dissolved oxygen nor suspended organics (food) can be invoked as controls for the initiation of growth.
Print ISSN: 0003-0031; Online ISSN: 1938-4238
University of Notre Dame
Way, Carl M.; Hornbach, Daniel J.; and Burky, Albert J., "Comparative Life History Tactics of the Sphaeriid Clam, Musculium partumeium (Say), from a Permanent and a Temporary Pond" (1980). Biology Faculty Publications. 322.