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.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
