. Advances in the study of mammalian behavior. Mammals. Fig. 7. Spacing of parturient Weddell seals {Leptonychotes weddelli) in a pupping colony. in the bearded seal {Erignathus barbatus), the males are smaller than the females (Burns, 1967; Laws, 1957, 1958; Stirling, 19716). This includes the Weddell seal which is polygynous with males defending underwater territories (Kaufman et al., 1975; Ray, 1967; SiniflTet al., 1977). Repenning (1976) has hypothesized that the mating systems of pinnipeds (including the development of sexual dimorphism) are a product of feeding patterns. "In the hyp
. Advances in the study of mammalian behavior. Mammals. Fig. 7. Spacing of parturient Weddell seals {Leptonychotes weddelli) in a pupping colony. in the bearded seal {Erignathus barbatus), the males are smaller than the females (Burns, 1967; Laws, 1957, 1958; Stirling, 19716). This includes the Weddell seal which is polygynous with males defending underwater territories (Kaufman et al., 1975; Ray, 1967; SiniflTet al., 1977). Repenning (1976) has hypothesized that the mating systems of pinnipeds (including the development of sexual dimorphism) are a product of feeding patterns. "In the hypothesis that follows, pelagic feeders, because of their wide dispersal over the surface of the ocean, survive as a species only through evolution of a very specific homing instinct: thus designated rookeries: thus dimorphism and pinniped polygyny as reconstructed by Bartholomew. Coastal marine feeders have a ready access to land or ice; they may haul out in groups at any time of the year, but their grouping is protective rather than for birth and breeding; they have evolved relatively insigificant hom- ing instinct and dimorphism; and they do not have designated rook- eries for breeding and pupping. The exception is the walrus, a dimorphic coastal feeder whose ancestors, as we shall see, were pelagic feeders" (Repenning, 1976: 375). Essentially, Repenning's. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Eisenberg, John Frederick; Kleiman, Devra G; American Society of Mammalogists. [Shippensburg, Pa?] : American Society of Mammalogists
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectmammals
