caa a22 4500 465782876 CHVBK 20180323112000.0 cr unu---uuuuu 170327e19900801xx s 000 0 eng 10.1007/BF00168452 doi (NATIONALLICENCE)springer-10.1007/BF00168452 Maternal investment in sons and daughters: problems of methodology [Elektronische Daten] [Wendy Green, Joel Berger] Summary: The prediction that mothers should invest more in sons than daughters was briefly examined in American bison (Bison bison) by Wolff (1988). He concluded that (a) male calves suckle more than females, (b) cows that had previously produced sons were more likely to be barren, and (c) cows that had male calves became estrous later in the year than other cows. In this paper we present data from two long term studies at different sites to show that Wolff's conclusions are equivocal at best and difficult to reconcile with predictions of the hypothesis because of questionable methods and assumptions. Springer-Verlag, 1990 Green Wendy Program in Ecology, Evolution, and Conservation Biology, University of Nevada, 89557, Reno, NV, USA aut Berger Joel Program in Ecology, Evolution, and Conservation Biology, University of Nevada, 89557, Reno, NV, USA aut Behavioral Ecology and Sociobiology Springer-Verlag 27/2(1990-08-01), 99-102 0340-5443 27:2<99 1990 27 265 https://doi.org/10.1007/BF00168452 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00168452 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Green Wendy Program in Ecology, Evolution, and Conservation Biology, University of Nevada, 89557, Reno, NV, USA aut NATIONALLICENCE 700 1- Berger Joel Program in Ecology, Evolution, and Conservation Biology, University of Nevada, 89557, Reno, NV, USA aut NATIONALLICENCE 773 0- Behavioral Ecology and Sociobiology Springer-Verlag 27/2(1990-08-01), 99-102 0340-5443 27:2<99 1990 27 265 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer