by S.M. GIANNONI, C.E. BORGHI and J.P. MARTINEZ-RICA Institute) Pirenaico de Ecologia, CS.I.C. Apdo. 64. 22700 Jaca (Hitesca), Spain Summary. - The swimming ability of the fossorial rodent Microtus (Pitymys) lusitanicus was studied. The style of swimming was " dog-padle". The mean swimming time was 33.8 minutes, the maximum swimming time was 60 min and the minimum was 12 min. There was a negative correlation between total swimming time and time to begin floating, and significant positive correlations between total swimming time and total floating time in each experiment. The lusitanian pine vole is a good swimmer in comparison with other fossorial species. Although the role of swimming ability in the geographic distribution in Pitymys lusitanicus is entirely speculative, rivers could not be significant barriers. Resume. - Etude de l'aptitude a la natation chez le rongeur fouisseur Microtus (Pitymys) lusitanicus. Ce rongeur nage comme un chien pendant une duree moyenne de 33,8 minutes (maximum : 60 minutes). On a constate une correlation negative entre la duree de la nage et le moment ou il commence a flotter. Par centre, il y a eu des correlations positives significatives entre la duree de la nage et la duree de la
Mammalia - International Journal of the Systematics, Biology and Ecology of Mammals – de Gruyter
Published: Jan 1, 1993
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