Maternal influences on population dynamics: Evidence from an exploited freshwater fish

Paul A. Venturelli, Cheryl A. Murphy, Brian J. Shuter, Thomas A. Johnston, Peter J. Van Coeverden De Groot, Peter T. Boag, John M. Casselman, Robert Montgomery, Murray D. Wiegand, William C. Leggett

Research output: Contribution to journalArticlepeer-review

88 Scopus citations

Abstract

We used a field experiment, population modeling, and an analysis of 30 years of data from walleye (Sander vitreus; a freshwater fish) in Lake Erie to show that maternal influences on offspring survival can affect population dynamics. We first demonstrate experimentally that the survival of juvenile walleye increases with egg size (and, to a lesser degree, female energy reserves). Because egg size in this species tends to increase with maternal age, we then model these maternal influences on offspring survival as a function of maternal age to show that adult age structure can affect the maximum rate at which a population, can produce new adults. Consistent with this hypothesis, we present empirical evidence that the maximum reproductive rate of an exploited population of walleye was approximately twice as high when older females were abundant as compared to when they were relatively scarce. Taken together, these results indicate that age- or size-based maternal influences on offspring survival can be an important mechanism driving population dynamics and that exploited populations could benefit from management strategies that protect, rather than target, reproductively valuable individuals.

Original languageEnglish (US)
Pages (from-to)2003-2012
Number of pages10
JournalEcology
Volume91
Issue number7
DOIs
StatePublished - Jul 2010
Externally publishedYes

Keywords

  • Age structure
  • Demographics
  • Egg size
  • Lake erie
  • Maternal effects
  • Maternal influences
  • Offspring survival
  • Population dynamics
  • Recruitment
  • Relative fecundity
  • Sander vitreus
  • Walleye

Fingerprint

Dive into the research topics of 'Maternal influences on population dynamics: Evidence from an exploited freshwater fish'. Together they form a unique fingerprint.

Cite this