title: Seasonal changes in body composition of Ctenomys talarum (Rodentia: Octodontidae): an herbivore subterranean rodent.
abstract: Ctenomys talarum is a subterranean herbivorous rodent whose burrow systems exhibit particular characteristics, distinct from other subterranean environments. We studied seasonal variation in body composition of C. talarum in relation to energetic requirements. Body lipid content seasonally changed in C. talarum, related to reproductive cycle and thermorregulatory mechanisms. A decrease in protein body content was found only in spring. Ash content of females was lowest when most of them are in post partum estro. Observed variations in water body content could be associated with plant water content and/or metabolic regulation. Our results show the occurrence of seasonal variations in body composition in C. talarum, which could be related to the high cost of reproduction and the subterranean life style of this species.
authors.affiliation: Laboratorio de Ecofisiología, Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CC 1245, Mar del Plata 7600, Argentina. delvalle@mdp.edu.ar
authors.forename: Juana C
authors.initials: JC
authors.lastname: del Valle
authors.forename: Alejandra A
authors.initials: AA
authors.lastname: López Mañanes
authors.forename: Cristina
authors.initials: C
authors.lastname: Busch
mesh_terms: D000818:Animals; D001823:Body Composition / Q000502:physiology*; D001831:Body Temperature / Q000502:physiology; D001834:Body Water / Q000378:metabolism; D001835:Body Weight / Q000502:physiology; D004734:Energy Metabolism / Q000502:physiology; D005260:Female; D006801:Humans; D050356:Lipid Metabolism / Q000502:physiology; D008297:Male; D011506:Proteins / Q000378:metabolism; D012098:Reproduction / Q000502:physiology; D012377:Rodentia / Q000378:metabolism* / Q000502:physiology; D012621:Seasons
chemical_list: D011506:Proteins