MISC

2011年3月

Increased guarding duration reduces growth and offspring number in females of the skeleton shrimp Caprella penantis

ANIMAL BEHAVIOUR
  • Fumio Takeshita
  • ,
  • Roberto Carlos Lombardo
  • ,
  • Satoshi Wada
  • ,
  • Yasuhisa Henmi

81
3
開始ページ
661
終了ページ
666
記述言語
英語
掲載種別
DOI
10.1016/j.anbehav.2010.12.017
出版者・発行元
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD

The reproductive strategy of one sex often imposes fitness costs on the other. In crustaceans, precopulatory mate guarding often imposes reproductive costs on females. In iteroparous species with indeterminate growth, such costs may affect not only current reproduction but also growth and lifetime fecundity. We investigated the cost imposed by male mate guarding on the long-term reproductive fitness of females in the skeleton shrimp Caprella penantis. We kept skeleton shrimps for 50 days in three different sex ratio treatments: male biased, even and female biased. Five female fitness components were recorded: survival rate, growth rate, number of clutches, clutch interval and average number of juveniles. Occurrence and duration of guarding increased in the male-biased treatment, indicating that males responded to changes in mate availability through increased guarding. Females under the male-biased sex ratio showed reduced growth rate owing to the longer guarding duration and were consequently smaller. No significant difference between treatments was found in the number of and interval between clutches, but, compared with the even sex ratio treatment, females in the male-biased treatment produced fewer juveniles on average than those in the female-biased treatment. These results indicate that extended guarding duration imposes long-term costs on female fitness in the form of decreased growth and low offspring production. (C) 2010 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.

Web of Science ® 被引用回数 : 6

リンク情報
DOI
https://doi.org/10.1016/j.anbehav.2010.12.017
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000287300800021&DestApp=WOS_CPL
URL
http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=201102261073154861