MIGRATION IN THE GRASSHOPPER MELANOPLUS SANGUINIPES (FAB.). II. INTERACTIONS BETWEEN FLIGHT AND REPRODUCTION

M. L. Mcanelly,M. Rankin

Published 1986 in The Biological Bulletin

ABSTRACT

Prolonged flight behavior in females of the grasshopper, Melanop!us sanguinipes (Fab.), decreases as ovarian tract weight increases relative to body weight. However, reproductive maturation does not always permanently terminate the migratory phase ofthe grasshopper's life cycle; long ifightsare also made after ovipositions. We examine the hypothesis that migration (measured as long-duration tethered flight behavior) decreases reproductive potential, either by delaying first oviposition or by decreasing production of egg pods. No negative effects of ifight on oviposition were observed. Instead, age at first oviposition tended to decrease in females flown repeatedly compared to those flown only twice. Further, oviposition was greatly enhanced in females flown for several hours relative to unflown controls. We suggest that selection pressure for rapid and successful colonization has resulted in the evolution of a suite of characters including enhanced migratory behavior and accelerated reproduction in highly mi gratory populations.

PUBLICATION RECORD

  • Publication year

    1986

  • Venue

    The Biological Bulletin

  • Publication date

    1986-06-01

  • Fields of study

    Biology, Environmental Science

  • Identifiers
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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