Diet alters delayed selfing, inbreeding depression, and reproductive senescence in a freshwater snail
| Autor: | Josh R. Auld, John F. Henkel |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Ecology
biology Reproductive success transgenerational effects aging Selfing Zoology Outcrossing Physa biology.organism_classification Mating system Freshwater snail Reproductive senescence Age at first reproduction Botany Inbreeding depression mating system caloric restriction pulmonate waiting time Ecology Evolution Behavior and Systematics Nature and Landscape Conservation Original Research |
| Zdroj: | Ecology and Evolution |
| ISSN: | 2045-7758 |
| Popis: | Reproductive success is a critical fitness attribute that is directly influenced by resource availability. Here, we investigate the effects of diet-based resource availability on three interrelated aspects of reproductive success: a change in mating system based on mate availability, consequent inbreeding depression, and the deterioration of reproductive efficiency with age (senescence). We employed a factorial experimental design using 22 full-sib families of the hermaphroditic freshwater snail Physa acuta to explore these interactions. Individual snails were reared in one of two mate-availability treatments (isolated [selfing] or occasionally paired [outcrossing]) and one of two diet treatments (boiled lettuce or Spirulina, an algae that is rich in protein, vitamins, and minerals). Spirulina-fed snails initiated reproduction at a 13% earlier age and 7% larger size than lettuce-fed snails. Spirulina also resulted in a 30% reduction in the time delay before selfing. Compared to lettuce, a diet of Spirulina increased inbreeding depression by 52% for egg hatching rate and 64% for posthatching juvenile survival. Furthermore, Spirulina led to a 15-fold increase in the rate of reproductive senescence compared with a diet of lettuce. These transgenerational, interactive effects of diet on inbreeding depression and reproductive senescence are discussed in the context of diet-induced phenotypic plasticity. |
| Databáze: | OpenAIRE |
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