uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
The operational sex-ratio influences choosiness in a pipefish
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Animal Ecology.
1994 (English)In: Behavioral Ecology, ISSN 1045-2249, E-ISSN 1465-7279, Vol. 5, no 3, 254-258 p.Article in journal (Refereed) Published
Abstract [en]

If more females than males are available for mating in the breeding population (i.e., the operational sex ratio, OSR, is female biased), males can afford to be choosy. In the pipefish (Syngnathus typhle) females compete for males, who are choosy. In nature OSRs are typically female biased, but may occasionally be male biased. In a series of experiments, males were allowed to choose between a large and a small female under a perceived excess of either males or females. Under female bias, males preferred the large female: they spent more time close to her than to the small female; they courted the large female sooner than the small; and they tended to copulate sooner and more often with the large female. Under male bias all these differences vanished and males mated at random with respect to female size. Males reproduced at a faster rate under male than under female bias because they received more eggs in their brood pouches. Thus, males switched from maximizing mate quality (i.e., being choosy) to minimizing the risk of not reproducing (i.e., being quick) as the OSR became male biased.

Place, publisher, year, edition, pages
1994. Vol. 5, no 3, 254-258 p.
Keyword [en]
mate choice, operational sex ratio, pipefish, sex role reversal, Syngnathidae
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-126430ISI: A1994NY82700003OAI: oai:DiVA.org:uu-126430DiVA: diva2:324082
Available from: 2010-06-14 Created: 2010-06-14 Last updated: 2010-08-05Bibliographically approved

Open Access in DiVA

No full text

Other links


Search in DiVA

By author/editor
Berglund, Anders
By organisation
Animal Ecology
In the same journal
Behavioral Ecology
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 230 hits
ReferencesLink to record
Permanent link

Direct link