Mating system drives negative associations between morphological features in Schistosomatidae.

Sophie Beltran (1) , Yves Desdevises (2) , Julien Portela (1) , Jérôme Boissier (1)

1 2EI - Ecologie et évolution des interactions [2011-2014]
2 BIOM - Biologie intégrative des organismes marins

BACKGROUND: Sexual morphological features are known to be associated with the mating systems of several animal groups. However, it has been suggested that morphological features other than sexual characteristics could also be constrained by the mating system as a consequence of negative associations. Schistosomatidae are parasitic organisms that vary in mating system and can thus be used to explore links between the mating system and negative associations with morphological features. RESULTS: A comparative analysis of Schistosomatidae morphological features revealed an association between the mating system (monogamous versus polygynandrous) and morphological characteristics of reproduction, nutrition, and locomotion. CONCLUSIONS: The mating system drives negative associations between somatic and sexual morphological features. In monogamous species, males display a lower investment in sexual tissues and a higher commitment of resources to tissues involved in female transport, protection, and feeding assistance. In contrast, males of polygynandrous species invest to a greater extent in sexual tissues at the cost of reduced commitment to female care.

Mots clés: MULTIPLE SEQUENCE ALIGNMENT; COMBINING DATA SETS; SPERM COMPETITION; TESTIS SIZE; PHYLOGENETIC INFERENCE; BRAIN SIZE; SEXUAL COMPETITION; BODY-SIZE; EVOLUTION; MANSONI

Domaines: Biodiversité et Ecologie

Sophie Beltran, Yves Desdevises, Julien Portela, Jérôme Boissier. Mating system drives negative associations between morphological features in Schistosomatidae.. BMC Evolutionary Biology, 2010, 10, pp.245. ⟨10.1186/1471-2148-10-245⟩. ⟨halsde-00608633⟩