edoc

Daphnia females adjust sex allocation in response to current sex ratio and density

Booksmythe, Isobel and Gerber, Nina and Ebert, Dieter and Kokko, Hanna. (2018) Daphnia females adjust sex allocation in response to current sex ratio and density. Ecology Letters, 21 (5). pp. 629-637.

[img] PDF - Published Version
Restricted to Repository staff only

739Kb

Official URL: https://edoc.unibas.ch/68908/

Downloads: Statistics Overview

Abstract

Cyclical parthenogenesis presents an interesting challenge for the study of sex allocation, as individuals' allocation decisions involve both the choice between sexual and asexual reproduction, and the choice between sons and daughters. Male production is therefore expected to depend on ecological and evolutionary drivers of overall investment in sex, and those influencing male reproductive value during sexual periods. We manipulated experimental populations, and made repeated observations of natural populations over their growing season, to disentangle effects of population density and the timing of sex from effects of adult sex ratio on sex allocation in cyclically parthenogenetic Daphnia magna. Male production increased with population density, the major ecological driver of sexual reproduction; however, this response was dampened when the population sex ratio was more male-biased. Thus, in line with sex ratio theory, we show that D.magna adjust offspring sex allocation in response to the current population sex ratio.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Zoologie
05 Faculty of Science > Departement Umweltwissenschaften > Zoologie > Evolutionary Biology (Ebert)
UniBasel Contributors:Ebert, Dieter
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Wiley
ISSN:1461-023x
e-ISSN:1461-0248
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:05 Apr 2019 15:12
Deposited On:21 Feb 2019 15:38

Repository Staff Only: item control page