Plasma Luteinizing Hormone, Steroid Hormones, Behavioral Role, and Nest Stage in Cooperatively Breeding Harris' Hawks (Parabuteo unicinctus)

The Auk ◽  
1991 ◽  
Vol 108 (3) ◽  
pp. 619-637 ◽  
Author(s):  
Carol Masters Vleck ◽  
James Dawson
Keyword(s):  
Luteinizing Hormone ◽  
Steroid Hormones ◽  
Cooperatively Breeding ◽  
Parabuteo Unicinctus

POSSIBLE NEONATAL IMPRINTING OF LUTEINIZING HORMONE FEEDBACK BY TESTOSTERONE IN MALE RATS

1978 ◽  
Vol 79 (2) ◽  
pp. 241-242 ◽  
Author(s):  
G. BERAUD ◽  
M. AUDRAIN
Keyword(s):  
Luteinizing Hormone ◽  
Steroid Hormones ◽  
Critical Period ◽  
Neonatal Period ◽  
Mature Male ◽  
Male Rats ◽  
Considerable Evidence

Université de Rennes, Laboratoire de Physiologie des Régulations, UER des Sciences Biologiques, 35031 Rennes Cedex, France (Received 3 May 1978) The results described by Naftolin, Ryan, Davies, Reddy, Flores, Petro, White, Takaoka & Wolin (1975) and Moguilevsky, Scacchi & Rubinstein (1977) indicate that the aromatization of androgens to oestrogens during the neonatal period provides a probable route of action for the testicular androgens. It is also thought that during this critical period, the conversion of androgens to oestrogens is involved in regulation of the hepatic and adrenal enzymes that metabolize steroid hormones (De Moor, Verhoeven & Heyns, 1973; Goldman, Gustafsson & Stenberg, 1974; Gustafsson & Stenberg, 1974). There is considerable evidence that androgens inhibit the secretion of luteinizing hormone (LH) when administered to immature and mature male rats immediately after castration (Mahesh, Muldoon, Eldridge & Korach, 1975; Moger, 1976; Shin & Howitt, 1976). The purpose of the present investigation was

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