Document Detail

Living on the wedge: female control of paternity in a cooperatively polyandrous cichlid.
MedLine Citation:
PMID:  19726479     Owner:  NLM     Status:  MEDLINE    
Theories suggest that, in cooperatively breeding species, female control over paternity and reproductive output may affect male reproductive skew and group stability. Female paternity control may come about through cryptic female choice or female reproductive behaviour, but experimental studies are scarce. Here, we show a new form of female paternity control in a cooperatively polyandrous cichlid fish (Julidochromis transcriptus), in which females prefer wedge-shaped nesting sites. Wedge-shaped sites allowed females to manipulate the siring success of the group member males by spawning the clutch at the spot where the large males were just able to enter and fertilize the outer part of the clutch. Small males fertilized the inner part of the clutch, protected from the large aggressive males, leading to low male reproductive skew. Small males provided more brood care than large males. Multiple paternity induced both males to provide brood care and reduced female brood care accordingly. This is, to our knowledge, the first documented case in a species with external fertilization showing female mating behaviour leading to multiple male paternity and increased male brood care as a result.
Masanori Kohda; Dik Heg; Yoshimi Makino; Tomohiro Takeyama; Jun-ya Shibata; Katsutoshi Watanabe; Hiroyuki Munehara; Michio Hori; Satoshi Awata
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-09-02
Journal Detail:
Title:  Proceedings. Biological sciences / The Royal Society     Volume:  276     ISSN:  1471-2954     ISO Abbreviation:  Proc. Biol. Sci.     Publication Date:  2009 Dec 
Date Detail:
Created Date:  2009-10-27     Completed Date:  2010-03-01     Revised Date:  2013-05-31    
Medline Journal Info:
Nlm Unique ID:  101245157     Medline TA:  Proc Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  4207-14     Citation Subset:  IM    
Animal Sociology, Department of Biology and Geosciences, Graduate School of Science, Osaka City University, Osaka 558-8585, Japan.
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MeSH Terms
Analysis of Variance
Body Size
Cichlids / physiology*
Competitive Behavior / physiology*
Nesting Behavior / physiology*
Sexual Behavior, Animal / physiology*
Spatial Behavior / physiology*

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