Kin-mediated plasticity in alternative reproductive tactics
| Autor: | Samuel J. Lymbery, Bruno A. Buzatto, David J. Hosken, Joseph L. Tomkins |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Male
Population Density Mites Phenotypic plasticity General Immunology and Microbiology Evolution Reproduction General Medicine Kin selection Plasticity Biology Phenotype General Biochemistry Genetics and Molecular Biology Sexual Behavior Animal Evolutionary biology Animals Humans General Agricultural and Biological Sciences Acaridae General Environmental Science |
| Zdroj: | Proc Biol Sci |
| ISSN: | 1471-2954 0962-8452 |
| DOI: | 10.1098/rspb.2021.1069 |
| Popis: | Conditional strategies occur when the relative fitness pay-off from expressing a given phenotype is contingent upon environmental circumstances. This conditional strategy model underlies cases of alternative reproductive tactics, in which individuals of one sex employ different means to obtain reproduction. How kin structure affects the expression of alternative reproductive tactics remains unexplored. We address this using the miteRhizoglyphus echinopus, in which large males develop into aggressive ‘fighters’ and small males develop into non-aggressive ‘scramblers.’ Because only fighters kill their rivals, they should incur a greater indirect fitness cost when competing with their relatives, and thus fighter expression could be reduced in the presence of relatives. We raised mites in full-sibling or mixed-sibship groups and found that fighters were more common at higher body weights in full-sibling groups, not less common as we predicted (small individuals were almost exclusively scramblers in both treatments). This result could be explained if relatedness and cue variability are interpreted signals of population density, since fighters are more common at low densities in this species. Alternatively, our results may indicate that males compete more intensely with relatives in this species. We provide the first evidence of kin-mediated plasticity in the expression of alternative reproductive tactics. |
| Databáze: | OpenAIRE |
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