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THE MATERNAL AND NEONATAL WEIGHTS OF SOME MAMMALIA
Author(s) -
LEITCH I.,
HYTTEN F. E.,
BILLEWICZ W. Z.
Publication year - 1959
Publication title -
proceedings of the zoological society of london
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0370-2774
DOI - 10.1111/j.1469-7998.1959.tb05549.x
Subject(s) - body weight , birth weight , biology , zoology , demography , pregnancy , genetics , endocrinology , sociology
SUMMARY When a comparison is made between maternal weight and weight of young in mammals the significant relation is of maternal weight to total weight of young at a birth. A collection of data for 114 species is presented. The logarithms of maternal and newborn weights have a straight line relation from bats to whales. Relatively the larger mammals carry a smaller weight of young. Sources of variation in the ratio of weight of young to weight of mother are discussed and a brief comparison is made with the results of Heinroth's analysis of weights of birds and their eggs.