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

Direct link
Male size determines reproductive output in a paternal mouthbrooding fish
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology, Animal Ecology.ORCID iD: 0000-0001-5791-336X
2002 (English)In: Animal Behaviour, ISSN 0003-3472, E-ISSN 1095-8282, Vol. 63, no 4, 727-733 p.Article in journal (Refereed) Published
Abstract [en]

Size can have strong effects on reproductive success in both males and females, and in many species large individuals are preferred as mates. To estimate the potential benefits from mate choice for size in both sexes, I studied the effects of the size of each sex on the reproductive output of pairs of Banggai cardinalfish, Pterapogon kauderni, a sexually monomorphic obligate paternal mouthbrooder. When pairs were allowed to form freely, a size-assortative mating pattern was observed and larger pairs had a higher reproductive output as determined by total clutch weight and egg size. To separate the potential benefits from mate choice for size for each sex, I subsequently used these pairs to form reversed size-assortative pairs, that is, the largest male paired to the smallest female and vice versa. I found a positive correlation between male size and clutch size: relatively heavier clutches were found in pairs where females were given a larger male. This suggests that the size of the male influences clutch weight. For egg size, however, the size of both sexes seemed important. The study reveals the benefits of mutual mate choice on size in this species: larger females provide larger eggs and larger males can brood heavier clutches. Furthermore, these results suggest that females differentially allocate resources into the eggs according to the size of the mate.

Place, publisher, year, edition, pages
2002. Vol. 63, no 4, 727-733 p.
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-90785DOI: 10.1006/anbe.2001.1959OAI: oai:DiVA.org:uu-90785DiVA: diva2:163259
Available from: 2003-09-04 Created: 2003-09-04 Last updated: 2014-09-26Bibliographically approved
In thesis
1. Influence of Mate Quality on Reproductive Decisions in a Fish with Paternal Care
Open this publication in new window or tab >>Influence of Mate Quality on Reproductive Decisions in a Fish with Paternal Care
2003 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Female reproductive decisions have been suggested to be highly influenced by mate quality. I have studied whether offspring quality may be adjusted by females to match the attractiveness of males and how strong control females have over their reproductive investment focusing on egg size. This was done in the Banggai cardinalfish (Pterapogon kauderni), a sex-role reversed obligate paternal mouthbrooder where males invest heavily into reproduction. As this species is suitable for both laboratory experiments and field studies it is an ideal candidate for the study of reproductive investment.

Mating was size-assortative and both males and females benefited from pairing with large partners. However, male size determined the reproductive output of a pair. Females courted large males more intensively and produced larger, but not fewer eggs when mated to large males as compared to small males. Further, this matching of egg size to mate attractiveness may be fast. Female courtship behaviours contained honest information regarding both clutch weight and egg maturity, traits that may be highly important for male mate choice. Surprisingly, males played an important part in territory defence suggesting relatively equal sex-roles in this species. Also, this species showed stable group structures which may be important for the evolution of female plasticity in reproductive investment due to high variance in quality of available mates.

This thesis suggest that females have a remarkable control over their reproductive investments and that male quality may be highly influential on reproductive decisions regarding offspring quality. Furthermore, it suggest that sexual selection may have strong effects on the evolution of egg size and parental care on a whole.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2003. 33 p.
Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1104-232X ; 882
Ecology, sexual selection, differential allocation, evolution of egg size and parental care, Ekologi
National Category
urn:nbn:se:uu:diva-3562 (URN)91-554-5723-1 (ISBN)
Public defence
2003-09-26, Ekman salen, Uppsala, 10:00
Available from: 2003-09-04 Created: 2003-09-04 Last updated: 2014-09-26Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Kolm, Niclas
By organisation
Animal Ecology
In the same journal
Animal Behaviour
Natural 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

Altmetric score

Total: 185 hits
ReferencesLink to record
Permanent link

Direct link