Title

Comparative Life History Tactics of the Sphaeriid Clam, Musculium partumeium (Say), from a Permanent and a Temporary Pond

Document Type

Article

Publication Date

10-1980

Publication Source

The American Midland Naturalist

Abstract

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.

Inclusive pages

319-327

ISBN/ISSN

Print ISSN: 0003-0031; Online ISSN: 1938-4238

Publisher

University of Notre Dame

Volume

104

Peer Reviewed

yes

Issue

2


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