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Natural selection associated with birth weight I. Selection intensity and selective deaths from birth to one month of life
Author(s) -
TERRENATO L.,
GRAVINA M. F.,
ULIZZI L.
Publication year - 1981
Publication title -
annals of human genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.537
H-Index - 77
eISSN - 1469-1809
pISSN - 0003-4800
DOI - 10.1111/j.1469-1809.1981.tb00306.x
Subject(s) - selection (genetic algorithm) , natural selection , demography , birth weight , biology , genetics , pregnancy , computer science , artificial intelligence , sociology
SUMMARY Differential mortality as a function of birth weight was studied up to the 4th week of life in all single births in Italy in 1974.(i) Both selection intensity and selective mortality are much higher with increasing immaturity. (ii) For babies born at term or after 8 months of pregnancy selection intensity tends io relax as early as one week after birth, while for those born after 7 months selection is at work for a longer period. (iii) Selective mortality, on the other hand, keeps increasing after birth but its relevance is relatively decreasing since average mortality after birth continues to decrease.