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2013 Fiscal Year Final Research Report

A study of the importance of fertilization period for maternal manipulation of offspring traits

Research Project

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Project/Area Number 23570020
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Ecology/Environment
Research InstitutionTokyo Gakugei University

Principal Investigator

KARINO KENJI  東京学芸大学, 教育学部, 教授 (40293005)

Project Period (FY) 2011 – 2013
Keywords産子調節 / 受精時期 / 性淘汰 / 配偶者選択 / 行動生態学
Research Abstract

Female guppies Poecilia reticulata, a live-bearing fish, are known to adjust the number of offspring according to the attractiveness of their mates. In this study, I tested a hypothesis that females may adjust the number of offspring by manipulating fertilization period of eggs. Results of this study indicated that females fertilized their eggs immediately after mating with males, when the males were preferred by the females in female preference test. On the other hand, some females did not fertilize eggs even 22 days after mating. These females held many ripe eggs according to the extent of sexual ornamentation of their mates. These results suggest that female guppies may manipulate fertilization period and the number of ripe eggs until fertilization depending on the attractiveness of their mates.

  • Research Products

    (2 results)

All 2013 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results)

  • [Journal Article] Negative correlation between male ornament size and female preference intensity in a wild guppy population2013

    • Author(s)
      Hiromi Kudo, Kenji Karino
    • Journal Title

      Behavioral Ecology and Sociobiology

      Volume: Vol. 67 Pages: 1931-1938

    • DOI

      10.1007/s00265-013-1600-z

    • Peer Reviewed
  • [Journal Article] Variation in female guppy preference for male olfactory and visual traits

    • Author(s)
      Aya Sato, Naoko Ozawa, Kenji Karino
    • Journal Title

      Journal of Ethology

      Volume: Vol. 32(印刷中)

    • DOI

      10.1007/s10164-014-0402-8

    • Peer Reviewed

URL: 

Published: 2015-07-16  

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