If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Temporal changes in the relationship between observed and expected sex‐investment frequencies, social structure and intraspecific parasitism in

$48.00 plus tax (Refund Policy)

Download / Buy Article:

Abstract:

The proportional investment in females (IF0) was observed in three Dorset (UK) populations (Portland, Holworth and St Alban's Head) of the ant Leptothorax tuberum during 1993 and 1994. The workers' optimum investment in females predicted by kin selection theory (IFE) was calculated for these populations from relatedness values estimated from an isozyme polymorphism. Although a previous study at Portland in 1992 found IFo and IFE not to differ, in 1993 IFo and IFE were significandy different from each other at Portland and St Alban's Head. In 1994 the difference was significant at Portland only. IFo was lower than IFE at all three sites in both years. The differences between 1992 and 1993 and 1994 were consistent with either an unresolved conflict between workers and queens for control of the IF or change in an environmental factor that affected all sites. Relatedness values showed that at Portland most nests were founded by one singly‐mated queen. However, at St Alban's Head relatedness values were consistent with some serial polygyny in 1993 but not 1994, while at Holworth there was some egg‐dumping by queens unrelated to the colony queen. The differences in nest structure between sites may have been related to habitat differences. In 1993 there was evidence of a split sex ratio. However, unlike 1992, the female biased nests did not have a higher relatedness asymmetry than the male biased nests.

Document Type: Original Article

DOI: http://dx.doi.org/10.1111/j.1095-8312.1997.tb01805.x

Affiliations: Institute of Terrestrial Ecology, Furzebrook Research Station, Wareham, Dorset BH20 5AS

Publication date: August 1, 1997

Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more