Individual mares bias investment in sons and daughters in relation to their condition

Natural Selection of Parental Ability to Vary the Sex Ratio of Offspring

Robert Trivers, Dan E. Willard · Science · 1973 · 3.9K citations

Life Sciences, Biology, Evolutionary Biology +17

Extraordinary Sex Ratios

W D Hamilton · Science · 1967 · 3.7K citations

Social Sciences, Endocrinology, Reproductive Medicine +4

Sexual selection and the descent of man. 1871–1971

Journal of Human Evolution · 1975 · 2.3K citations

Life Sciences, Evolutionary Biology, Genetics +14

Relationship between condition score, physical measurements and body fat percentage in mares

D.R. Henneke, G.D. Potter, J.L. Kreider et al. · Equine Veterinary Journal · 1983 · 1.9K citations

Agriculture, Animal Sciences, Veterinary Physiology +15

Sex Ratio and Local Resource Competition in a Prosimian Primate

Anne B. Clark · Science · 1978 · 917 citations

Life Sciences, Biology, Zoology +17