Book ChapterDOI
Chapter 1 – REPRODUCTION IN BIRDS
B. Lofts,R.K. Murton +1 more
- pp 1-107
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The article was published on 1973-01-01. It has received 196 citations till now. The article focuses on the topics: Reproduction.read more
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Journal ArticleDOI
Parasites, bright males, and the immunocompetence handicap
Ivar Folstad,Andrew John Karter +1 more
TL;DR: A phenomenological model is presented, operating on an intraspecific level, which views the cost of secondary sexual development from an endocrinological perspective and proposes a negative-feedback loop between signal intensity and parasite burden by suggesting that testosterone-dependent signal intensity is a plastic response.
Journal ArticleDOI
Evolution of condition-dependent sex ornaments and mating preferences: sexual selection based on viability differences.
TL;DR: The possibility that the evolution of mating preferences and secondary sex traits can be based on heritable differences in viability is examined with a three‐locus model, based on a monogamous mating system that precludes such a Fisherian mating advantage being required.
Book ChapterDOI
Reproduction in the Female
TL;DR: The right ovary and oviduct are present in embryonic stages of all birds, but the distribution of primordial germ cells to the ovaries of the chicken becomes asymmetrical by day 4 of incubation, and by day 10 regression of the right ovidUCT begins.
Journal ArticleDOI
Testosterone and avian life histories: effects of experimentally elevated testosterone on behavior and correlates of fitness in the dark-eyed junco (junco hyemalis)
TL;DR: The effect of testosterone treatment on parental behavior and vocal behavior of adult male dark-eyed juncos is reported and it is suggested that a broad range of behavioral phenotypes is selectively neutral in the junco.
References
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Journal ArticleDOI
Comparative Ability of Seminiferous Tubules and Interstitial Tissue of Rat Testes To Synthesize Androgens from Progesterone-4-14C in Vitro
TL;DR: Results confirm previous evidence that the interstitial tissue is the principal source of testicular androgens, but show that the seminiferous tubules are also capable of significant androgen biosynthesis in vitro.
Journal ArticleDOI
MICROSCOPIC HISTOCHEMICAL DEMONSTRATION OF STEROID-3β-OL DEHYDROGENASE IN TISSUE SECTIONS
TL;DR: A procedure for the microscopic histochemical demonstration of steroid-3β-ol dehydrogenase has been described and positive reactions have been obtained in the adrenal cortex, corpus luteum, placenta, and interstitial cells of the testis.
Journal ArticleDOI
Photoperiodic and physiological adaptations regulating avian breeding cycles and their ecological significance
B. Lofts,R. K. Murton +1 more
TL;DR: Probably the most valuable of his many contributions to the field of avian physiology was his ability to relate laboratory experimentation to the natural environment.
Journal ArticleDOI
Mitochondrial structure in sites of steroid secretion.
W. Duane Belt,Daniel C. Pease +1 more
TL;DR: It is suggested that while mitochondria in many places have a tubular component, those in the adrenal gland are highly specialized by virtue of their giant size and their internal structure.