6533b7d1fe1ef96bd125d7b8
RESEARCH PRODUCT
Daphnia females adjust sex allocation in response to current sex ratio and density
Hanna KokkoDieter EbertIsobel BooksmytheNina GerberNina Gerbersubject
Male0106 biological sciencesLIZARDSsukupuolen määräytyminenParthenogenesisDaphnia magna01 natural sciencesPopulation densityLOCAL ADAPTATIONMETAPOPULATIONSex allocationsex allocationeducation.field_of_studyEcologyReproductionINDUCTIONPOPULATION-DENSITYBiological EvolutionCRUSTACEA1181 Ecology evolutionary biology590 Animals (Zoology)FemaleReproductive valueHAPLODIPLOID CYCLICAL PARTHENOGENSsuvuton lisääntyminenSex ratioOffspringcyclical parthenogenCLADOCERAPopulationsex ratio adjustmentBiology010603 evolutionary biology10127 Institute of Evolutionary Biology and Environmental StudiesAnimalsSex Ratioeducationpopulation densityEcology Evolution Behavior and SystematicsLocal adaptationAVAILABILITY010604 marine biology & hydrobiologypartenogeneesipopulaatiodynamiikkaSexual reproduction1105 Ecology Evolution Behavior and SystematicsDaphniaMAGNAvesikirput570 Life sciences; biologyta1181asukastiheysDemographydescription
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. peerReviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-05-01 | Ecology Letters |