Change search
ReferencesLink to record
Permanent link

Direct link
No effect of male courtship intensity on female remating in the butterfly Pieris napi.
Stockholm University, Faculty of Science, Department of Zoology.
Stockholm University, Faculty of Science, Department of Zoology.ORCID iD: 0000-0003-4719-487X
2005 (English)In: Journal of insect behavior, ISSN 0892-7553, Vol. 18, no 4, 479-489 p.Article in journal (Refereed) Published
Abstract [en]

In Pieris napi, female fitness increases with number of matings, but wild females mate at an unexpectedly low rate. From a sexual conflict perspective this could be because males manipulate female remating, or alternatively, because wild females experience costs associated with remating which are not applicable under laboratory conditions. To get an indication which sex controls remating and/or the different sexes’ relative costs and benefits of remating, we here test whether female mating frequency is affected by male courtship intensity. We found no effect on female mating frequency or lifespan. This indicates that (i) females control remating and their optimal mating frequency is lower compared to males, or (ii) males can manipulate female remating. We argue that both these alternatives may apply simultaneously to P. napiand that they are inseparable.

Place, publisher, year, edition, pages
2005. Vol. 18, no 4, 479-489 p.
Keyword [en]
lepidoptera, pieridae, nuptial gifts, sexual conflict, mating rate
National Category
Natural Sciences
URN: urn:nbn:se:su:diva-24085DOI: 10.1007/s10905-005-5605-XOAI: diva2:196718
Part of urn:nbn:se:su:diva-66Available from: 2004-03-11 Created: 2004-03-11 Last updated: 2014-10-13Bibliographically approved
In thesis
1. The evolution of mating rates in Pieris napi
Open this publication in new window or tab >>The evolution of mating rates in Pieris napi
2004 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

In the green-veined white butterfly (Pieris napi), females obtain direct fitness benefits from mating multiply and studies have shown that fitness increases seemingly monotonically with number of matings. The reason is that at mating males transfer a large nutritious gift (a so called nuptial gift) to the females that the females use to increase both their fecundity and lifespan. In addition, if exposed to poor food conditions as larvae, females mature at a smaller size compared to males. Accordingly, it was suggested that smaller females could compensate for their size through nuptial feeding by, for instance, mating more frequently. We did not find any support for that hypothesis. On the contrary, larger females remated sooner and had a higher lifetime number of matings. Neither were smaller females able to compensate in any other way, because singly mated females and multiply mated females suffered to the same extent from their smaller size. This thesis also shows that despite the positive relationship between fitness and number of matings, there is a large variation in female mating frequency in wild populations and about every second female mates only once or twice. This variation is not dependent on how often females get courted by males, because female mating frequency was shown not to be affected by male courtship intensity. Hence, the reason for the low mating frequency could either be that males have evolved the ability to manipulate females to mate at a suboptimal rate as a measure of protection against sperm competition, or alternatively, that female mating rate is suppressed by some costs. Using two selection lines, artificially selected for either a high or a low mating rate, we showed that the variation in mating rate was mainly a female trait because which line the females were from affected their mating rate whereas which line the male was from did not. This implies that females mate at a low rate due to hidden costs or due to constraints. The same study also showed that females with a high "intrinsic" mating rate lived shorter, but only when denied remating. This led us to test the hypothesis that the cost females face is to have the ability to mate at a high rate but the cost is only paid when remating opportunities are scarce. However, we found no support for such an idea, because females with a high intrinsic mating rate held in a cold environment where the butterflies were prevented from flying and feeding did not live shorter. Neither was there an effect of a female’s mating rate on her ability to quickly break down and convert male nutrient gifts into egg material. Female mating rate did, on the other hand, affect dispersal tendency, with low mating rate females being more inclined to fly between different habitats. The underlying reason for this is still to be explored.

Place, publisher, year, edition, pages
Stockholm: Zoologiska institutionen, 2004. 34 p.
National Category
urn:nbn:se:su:diva-66 (URN)91-7265-827-4 (ISBN)
Public defence
2004-04-02, Nordenskiöldsalen, Geovetenskapens hus, Svante Arrhenius väg 8 C, Stockholm, 10:00
Available from: 2004-03-11 Created: 2004-03-11Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Wiklund, Christer
By organisation
Department of Zoology
In the same journal
Journal of insect behavior
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: 91 hits
ReferencesLink to record
Permanent link

Direct link