Results 261 to 270 of about 289,721 (306)
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Selection for Litter Size in Mice
Acta Agriculturae Scandinavica, 1977(1977). Selection for Litter Size in Mice. Acta Agriculturae Scandinavica: Vol. 27, No. 4, pp. 301-318.
Øystein Joakimsen, R. L. Baker
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1969
The breeding season at high latitudes is shorter than at low, so that the possible number of parturitions is reduced. In many field studies it has been noted that samples taken from higher latitudes inside a species range had larger litter sizes.
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The breeding season at high latitudes is shorter than at low, so that the possible number of parturitions is reduced. In many field studies it has been noted that samples taken from higher latitudes inside a species range had larger litter sizes.
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Relationship between litter birthweight and litter size in five goat genotypes
Animal Production Science, 2011The aim of the present study was to use a non-linear regression approach to investigate the relationship between litter birthweight and litter size of five breeds of goat under intensive conditions in a hot arid environment. Litter-size and litter-weight data on 20 117 kids from 13 685 litters representing five breeds, namely Saanen, Toggenburg, French
Miguel Mellado +6 more
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Evolution of Litter Size in Primates
The American Naturalist, 1979Despite strong selection for low reproductive turnover in primates in general, there is a considerable number of species in which multiple births regularly occur. Since multiple births are limited to the smallest species in both suborders, Strepsirhini and Haplorhini, it appears that restrictions of scaling set a threshold for maternal size below which
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State-Dependent Optimization of Litter Size
Oikos, 1998Four inter-related theories demonstrate that the quality or state of the parent influences its optimum litter size. A review of each model highlights their similar predictions, sets the stage for an expanded theory and demonstrates that three are really special cases of state-dependent optimization.
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Brown bear litter sizes in Croatia.
Ursus, 2001Mean litter sizes and maximum survival of cubs of brown bears (Ursus arctos) in Croatia were calculated based on 116 observations of 106 brown bear family groups. In addition to the number of cubs, each record contained the date, age of cubs (cubs-of-the-year [COY] or yearlings), and location (feeding stations or other places). The mean litter size was
Huber, Đuro, Kusak, Josip
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Gestation Period and Litter Size in the Goat
British Veterinary Journal, 1978SUMMARY Data on gestation period, litter size, incidence of still-births and sex ratio obtained from the Institute’s mainly British Saanen goat herd between 1954 and 1976 are presented. The overall median gestation period in 374 cases was 150 days.
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