Hypothalamic monoamine turnover in ring doves (streptopelia risoria), courting, incubating and brooding young

1992 ◽  
Vol 103 (2) ◽  
pp. 345-350 ◽  
Author(s):  
R.W. Lea ◽  
T.R. Hall ◽  
P.J. Sharp
Keyword(s):  
Streptopelia Risoria ◽  
Monoamine Turnover ◽  
Ring Doves

Systematic changes in gaping during the ontogeny of pecking in ring doves (Streptopelia risoria)

1995 ◽  
Vol 28 (3) ◽  
pp. 147-163 ◽  
Author(s):  
James D. Deich ◽  
Jenine Tankoos ◽  
Peter D. Balsam
Keyword(s):  
Streptopelia Risoria ◽  
Ring Doves

The role of estrogen and progesterone in the regulation of reproductive behaviour in female ring doves (Streptopelia risoria) under long vs. short photoperiods

1976 ◽  
Vol 54 (9) ◽  
pp. 1409-1422 ◽  
Author(s):  
N. R. Liley
Keyword(s):  
Hormone Treatment ◽  
Reproductive Behaviour ◽  
Egg Laying ◽  
Nest Building ◽  
Short Photoperiod ◽  
Streptopelia Risoria ◽  
Ring Doves ◽  
Long Photoperiod ◽  
Marked Tendency

Female ring doves held under long (16 h per day) or short (8 h per day) photoperiods were treated daily for 15 days with saline, estrogen, or progesterone, alone or in combination. Seven days after the start of hormone therapy females were placed with reproductively active males for 4 h per day for 9 days. There was no difference in egg-laying, courtship, and nest-building by control birds under the two photoregimes.Ovarian follicles remained small in all birds receiving hormone treatment. Oviducts of birds receiving progesterone alone remained small in the short-photoperiod group, but at long photoperiods oviducts became enlarged. Estrogen stimulated oviduct growth at both photoperiods. The combined hormone treatment resulted in considerably greater oviduct development than estrogen alone, and in this case the oviducts of birds under long photoperiod were significantly heavier than those of short-photoperiod birds.Female soliciting and nest-building activity remained low in progesterone-treated females under short photoperiod, but increased rapidly under long photoperiod. Birds treated with estrogen and estrogen and progesterone performed considerable soliciting and nest-building. There was a marked tendency for birds under long-photoperiod conditions to be more active in nest-oriented behaviour. Copulatory behaviour by the female (begging and sexual crouch) occurred infrequently in all hormone-treated birds.

HORMONES MODULATE THE CONCENTRATION OF CYTOPLASMIC PROGESTIN RECEPTORS IN THE BRAIN OF MALE RING DOVES (STREPTOPELIA RISORIA)

1980 ◽  
Vol 86 (2) ◽  
pp. 251-261 ◽  
Author(s):  
J. BALTHAZART ◽  
J. D. BLAUSTEIN ◽  
M. F. CHENG ◽  
H. H. FEDER
Keyword(s):  
Testosterone Propionate ◽  
Brain Regions ◽  
Posterior Hypothalamus ◽  
Vitro Assay ◽  
Progestin Receptors ◽  
Streptopelia Risoria ◽  
Oestradiol Benzoate ◽  
Ring Doves ◽  
The Brain

A cytoplasmic progestin receptor has been characterized in the brain of castrated ring doves using an in-vitro assay that measures the binding of a synthetic progestin, [3H]17α,21-dimethyl-19-nor-pregna-4,9-diene-3,20-dione(promegestone; R5020). The affinity of the receptor was similar in both the hyperstriatum and the hypothalamus (Kd≃4 × 10−10 mol/l). Its concentration was higher in the anterior hypothalamus–preoptic area (63 ± 4 fmol/mg (s.e.m.) protein) than in other brain regions (posterior hypothalamus, 33 ± 5; hyperstriatum, 28 ± 3; midbrain, 17 ± 4 fmol/mg protein; n = 7). Progesterone and R5020 competed well for binding but oestradiol and 5β-dihydrotestosterone did not. Corticosterone and, to a lesser extent, testosterone and 5α-dihydrotestosterone competed for binding but much higher concentrations were required than for progestins. Injections of testosterone (200 pg testosterone propionate daily for 7 days) significantly increased the concentration of progestin receptors in the anterior and posterior hypothalamus without having any significant effect on other brain areas. Shorter treatment, lasting for 2 days, with testosterone propionate (200 μg daily), 5α-dihydrotestosterone (200 μg daily) or oestradiol benzoate (50 μg daily) did not always cause this increase but seven injections of oestradiol benzoate (50 pg daily for 7 days) were even more effective than seven injections of testosterone propionate (200 μg daily for 7 days). These data suggested that the sensitivity to progesterone of the brain of the bird changes as a consequence of increases in the level of testosterone in the circulation.

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