species, like the agouti, teat functionality has never been investigated, however, the number of active nipples can vary with litter size, and may be considered inversely proportional as litter size can exceed available nipples as seen in guinea pigs (2 nipples), rats, dogs, cats and pigs (7-12 nipples) as well as in marsupials (5-12 nipples) (Hayssen, 1993; Senger, 2013).
Litter size and fetal sex ratio adjustment in a highly polytocous
species: the wild boar, Behav.
Larger fetuses of monotocous species are more prone to maldisposition than relatively small ovoid fetuses of polytocous
species (Jackson, 1995).
Mammalian species can be divided into two groups, monotocous and polytocous, by the number of progeny per birth.
In order to identify important genes that underlie the differences between monotocous and polytocous species, a novel approach focusing on the evolutionary genetic differences between the two groups of species was applied.
Ontogeny of sexual dimorphism in size among polytocous
mammals: tests of two carnivo- rous marsupials.
College Dublin, Ireland) have collected these papers for policymakers and researchers in agricultural sciences, covering such topics as the behavioral indicators of animal health and welfare, poultry housing and environment, resting behaviors as an assessment tool, the influence of genetics and breeding on animal welfare and mother-offspring behavior in polytocous
I fitted 4 allometric relationships according to the life history traits (birth mass and early growth rate) and to the species-specific litter size (polytocous and monotocous species).
As expected, a strong positive relationship occurred between birth mass (BW) and adult body mass (ABW) in both monotocous (Ln (BW) = -1.366 + 0.902 Ln (ABW); r = 0.977, P < 0.0001) and polytocous (Ln (BW) = -3.274 + 1.059 Ln (ABW); r = 0.892, P = 0.0029) species.
The Los Angeles-based artist has called her second exhibition in New York "Polytocous
," which means "capable of multiple births"; her basic subject is a polymorphous, faintly perverse energy, a whimsical, ironic fecundity that declares itself as intrinsically inorganic.
In this work, we report a quantitative analysis of family effects on life-history traits in a polytocous
ungulate, the roe deer (Capreolus capreolus).
Litter size declines with age and parity in females of many, but not all, species of polytocous
domestic and wild mammals (Sadleir, 1969; Nalbandov, 1976).