Summary
In experiments where 2 males were in competition for mating, large males were at an advantage inJaera italica, while no such selection based on male size existed inJaera istri. Sexual selection is likely to be responsible for the sexual dimorphism in body size found in the 1st species, in which males are larger than females, while the latter species is sexually monomorphic.
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Acknowledgments. We are indebted to Prof. J. David for helpful criticism of the manuscript.
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Veuille, M., Rouault, J. Experimental evidence of sexual selection based on male body size inJaera (Isopoda; Asellota). Experientia 36, 549–550 (1980). https://doi.org/10.1007/BF01965793
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DOI: https://doi.org/10.1007/BF01965793