Seasonal variation of thermoregulatory behaviour in the Hippopotamus ( Hippopotamus amphibius).Published in:Journal of Ethology, 2008, v. 26, n. 1, p. 191, doi. 10.1007/s10164-007-0052-1By:Noirard, Christian;Le Berre, M.;Ramousse, R.;Lena, J. P.Publication type:Article