Sexual dimorphism in subterranean amphipod crustaceans covaries with subterranean habitat type
Premate, E., Fišer, Ž., Biro, A., Copilas-Ciocianu, D., Fromhage, L., Jennions, M., Borko, Š., Herczeg, G., Balazs, G., Kralj-Fišer, S., & Fišer, C. (2024). Sexual dimorphism in subterranean amphipod crustaceans covaries with subterranean habitat type. Journal of Evolutionary Biology, 37(5), 487-500. https://doi.org/10.1093/jeb/voae032
Published in
Journal of Evolutionary BiologyAuthors
Date
2024Copyright
© 2024 the Authors
Sexual dimorphism can evolve in response to sex-specific selection pressures that vary across habitats. We studied sexual differences in subterranean amphipods Niphargus living in shallow subterranean habitats (close to the surface), cave streams (intermediate), and cave lakes (deepest, and most isolated). These three habitats differ because at greater depths there is lower food availability, reduced predation, and weaker seasonality. Additionally, species near the surface have a near even adult sex ratio (ASR), whereas species from cave lakes have a female-biased ASR. We hypothesized: i) a decrease in sexual dimorphism from shallow subterranean habitats to cave lake species, because of weaker sexual selection derived from changes in the ASR; and ii) an increase in female body size in cave lakes, because of stronger fecundity selection on account of oligotrophy, reduced predation, and weaker seasonality. We measured body size and two sexually dimorphic abdominal appendages for all 31 species, and several behaviours related to male competition (activity, risk-taking, exploration) for 12 species. Species with an equal ASR that live close to the surface exhibited sexual dimorphism in all three morphological traits, but not in behaviour. The body size of females increased from the surface to cave lakes, but no such trend was observed in males. In cave lake species, males and females differed neither morphologically nor behaviourally. Our results are consistent with the possibility that that sexual and fecundity selection covary across the three habitats, which indirectly and directly, respectively, shapes the degree of sexual dimorphism in Niphargus species.
...
Publisher
Oxford University PressISSN Search the Publication Forum
1010-061XKeywords
Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/207691893
Metadata
Show full item recordCollections
License
Related items
Showing items with similar title or keywords.
-
Size-selective harvesting fosters adaptations in mating behavior and reproductive allocation, affecting sexual selection in fish
Sbragaglia, Valerio; Gliese, Catalina; Bierbach, David; Honsey, Andrew E.; Uusi-Heikkilä, Silva; Arlinghaus, Robert (Wiley-Blackwell Publishing Ltd., 2019)The role of sexual selection in the context of harvest‐induced evolution is poorly understood. However, elevated and trait‐selective harvesting of wild populations may change sexually selected traits, which in turn can ... -
Fitness in male black grouse (Tetrao tetrix) : effects of life histories and sexual selection on male lifetime mating success
Kervinen, Matti (University of Jyväskylä, 2013) -
Sex-specific assumptions and their importance in models of sexual selection
de Vries, Charlotte; Lehtonen, Jussi (Elsevier BV, 2023)Sexual selection is a field coloured by tension and contrasting views. One contested claim is the causal link from the definition of the sexes (anisogamy) to divergent selection on the sexes. Does theory truly engage with ... -
Maintenance costs of male dominance and sexually antagonistic selection in the wild
Boratynski, Zbigniew; Koskela, Esa; Mappes, Tapio; Mills, Suzanne; Mökkönen, Mikael (Wiley-Blackwell Publishing Ltd., 2018)Variation in dominance status determines male mating and reproductive success, but natural selection for male dominance can be detrimental or antagonistic for female performance, and ultimately their fitness. Attaining and ... -
Population structure, life cycle, and trophic niche of the glacial relict amphipod, Gammaracanthus lacustris, in a large boreal lake
Salonen, Jouni K.; Hiltunen, Minna; Figueiredo, Kaisa; Paavilainen, Pinja; Sinisalo, Tuula; Strandberg, Ursula; Kankaala, Paula; Taskinen, Jouni (Wiley-Blackwell Publishing Ltd., 2019)Ecology of the glacial relict macrocrustacean Gammaracanthus lacustris, a rare inhabitant of deep Fennoscandian lakes, is poorly understood. We studied the life cycle and trophic position of this cold‐stenothermic amphipod ...