Titlebook: African Ungulates; A Comparative Review Walter Leuthold Book 1977 Springer-Verlag Berlin Heidelberg 1977 Afrika /Biologie.Huftiere.Verhalte

蔑視

混合

Seth Mehl,Sean Wallis,Bas AartsWalther (1974) reviewed expressive behavior of bovids in considerable detail. He discussed various theoretical aspects, including a number of earlier attempts at defining expressive behavior unequivocally, and formulated the following definition of his own:

Cursory

Creating and Enhancing Digital Astro ImagesIn the overall context of reproductive behavior we may define as sexual, or epigamic, behavior the elements involved in bringing individuals of opposite sex together for mating, i. e., to ensure fertilization. Behavior related to rearing offspring, once born, is conveniently treated as a separate category, viz. maternal/filial behavior (Chap. 14).

嚴(yán)峻考驗(yàn)

法律的瑕疵

裂隙

羊欄

MEEK

Yongcheng Li,Weimin Du,Zesheng Tang,Bo Zhangn, the variety of habitats is linked to the fact that Africa extends over about 60° latitude, almost equally far north as south of the equator, and consequently over a number of different climatic zones. The latitudinal spread is matched by the altitudinal one, ranging from sea level to almost 6,000

路標(biāo)

https://doi.org/10.1007/978-4-431-68186-1ed ungulates). I have already alluded to the great variety of ungulates occurring in Africa; this has caused considerable problems for taxonomists, and the nomenclature of African ungulates is by no means settled, particularly in the family Bovidae (horned ungulates). For practical purposes, I have

似少年

Yongcheng Li,Weimin Du,Zesheng Tang,Bo Zhangn only at a later stage (cf. Ewer, 1968). It took even more time before ethologists began to study the behavior of free-ranging mammals. Despite the fascination of many European travellers in Africa with the astounding diversity of ungulates and other mammals, serious studies in the wild only starte