[en] On four occasions during an annual cycle, 5--7 male domestic ducks were injected with two different doses (5 and 20 micrograms) of synthetic luteinizing hormone-releasing hormone (LHRH) to study the possible changes in responsiveness of the pituitary. The luteinizing hormone (LH) and the follicle-stimulating hormone (FSH) were measured in the plasma samples collected after these injections. The induced release of LH changes from one period of the year to another, being minimum in March at the height of the reproductive season. The LHRH injection also induces the release of some FSH but only in limited amounts. The changes in pituitary responsiveness to LHRH are negatively correlated to changes in the circulating LH level (it is high when the plasma LH is low and vice versa). This suggests that the hypothalamic synthesis and release of LHRH must also change during the year.
Disciplines :
Zoology Endocrinology, metabolism & nutrition
Author, co-author :
Balthazart, Jacques ; Université de Liège - ULiège > Département de morphologie et pathologie > Pathologie spéciale et autopsies
Willems, Jean; Unversité de Liege
Hendricks, Jean Claude
Language :
English
Title :
Changes in pituitary responsiveness to luteinizing hormone-releasing hormone during an annual cycle in the domestic duck, Anas platyrhynchos L.
Publication date :
1980
Journal title :
Journal of Experimental Zoology
ISSN :
0022-104X
eISSN :
1097-010X
Publisher :
John Wiley & Sons, Inc, Hoboken, United States - New Jersey
Assenmacher I. (1974) External and internal components of the mechanism controlling reproductive cycles in drakes. Circannual clocks, E. Pengelley, Academic Press, New York; .
Balthazart J., Le controle hormonal du comportement chez le canard domestique male (Anas platyrhynchos L.). Thes̀e de doctorat, Universite de Liège, Liège, Belgium.; 1977.
Balthazart J. (1978) Behavioural and physiological effects of testosterone propionate and cyproterone acetate in immature male domestic ducks, Anas platyrhynchos. Z. Tierpsychol. 47:410-421.
Balthazart J., Hendrick J. (1976) Annual variation in reproductive behavior, testosterone, and plasma FSH levels in the Rouen duck, Anas platyrhynchos. Gen. Comp. Endocrinol. 28:171-183.
Balthazart J., Hendrick J., Effects of exogenous gonadotropic and steroid hormones on the social behaviour and gonadal maturation of male domestic ducklings, Anas platyrhynchos. Arch. Int. Physiol. Biochimie (in press).; 1979.
Balthazart J., Hendrick J., Deviche P. (1977) Diurnal variations of plasma gonadotrophins in male domestic ducks during the sexual cycle. Gen. Comp. Endocrinol. 32:376-389.
Benoit J. (1936) Stimulation par la lumière de l'activité sexuelle chez le canard et la cane domestique. Bull. Biol. (France‐Belg.) 70:487-533.
Benoit J., Assenmacher I. (1959) The control by visible radiations of the gonadotropic activity of the duck hypophysis. Rec. Prog. Horm. Res. 15:143-163.
Benoit J., Assenmacher I., Brard E. (1955) Evolution testiculaire du canard domestique maintenu a l'obscurité totale pendant une longue période. C.R. Acad. Sci. 241:251-253.
Benoit J., Assenmacher I., Brard E. (1956) Etude de l'évolution testiculaire du canard domestique soumis tres̀ jeune a un éclairement artificiel permanent pendant deux ans. C.R. Acad. Sci. 242:3113-3115.
Benoit J., Assenmacher I., Brard E. (1956) Apparition et maintien de cycles sexuels non saisonniers chez le canard domestique élevé pendant plus de trois ans à l'obscurité totale. J. Physiol. (Paris) 48:388-391.
Croix D., Hendrick J., Balthazart J., Franchimont P. (1974) Dosage radioimmunologique de l'hormone folliculo‐stimulante (FSH) hypophysaire de canard à l'aide d'un système de mammifères. C.R. Soc. Biol. 168:136-140.
Davies D., Bicknell R. (1976) The effect of testosterone on the responsiveness of the quail's pituitary to luteinizing hormone‐releasing hormone (LHRH) during photoperiodically induced testicular growth. Gen. Comp. Endocrinol. 30:487-499.
Davies D., Baylé J., Bicknell R., Ashton S. (1976) The half‐life of luteinizing hormone in intact and castrated quail during photoperiodic stimulation. End. Res. Comm. 3:243-256.
Follett B. (1976) Plasma follicle‐stimulating hormone during photoerriodically induced sexual maturation in male Japanese quail. J. Endocrinol. 69:117-126.
Follett B., Scanes C., Cunningham F. (1972) A radioimmunoassay for avian luteinizing hormone. J. Endocrinol. 52:359-378.
Furr B., Onuora G., Bonney R., Cunningham F. (1973) The effect of synthetic hypothalamic releasing factors on plasma levels of luteinizing hormone in the cockerel. J. Endocrinol. 59:495-502.
Garnier D. (1971) Variations de la testosterone du plasma périphérique chez le canard Pékin au cours du cycle annuel. C.R. Acad. Sci. 272:1665-1668.
Gledhill B., Follett B. (1976) Diurnal variations and the episodic release of plasma gonadotrophins in Japanese quail during a photoperiodically‐induced gonadal cycle. J. Endocrinol. 71:245-257.
Gogan F. (1968) Sensibilité hypothalamique à la testostérone chez le canard. Gen. Comp. Endocrinol. 11:316-327.
Gogan F., Role de la rétroaction par la testostérone dans la régulation de la fonction gonadotrope du canard mǎle. Thes̀e de doctorat, Paris.; 1970.
Haase E., Sharp P., Paulke E. (1975) Annual cycle of plasma luteinizing hormone concentrations in wild mallard drakes. J. Exp. Zool. 194:553-558.
Haase E., Sharp P., Paulke E. (1976) Seasonal changes in plasma LH in domestic ducks. J. Reprod. Fertil. 44:591-594.
Höhn E. (1947) Sexual behaviour and seasonal changes in the gonads and adrenals of the mallard. Proc. Zool. Soc. (London) 117:218-230.
Jallageas M., Interactions réciproques testothyroidiennes chez le canard mǎle. Incidences sur les cycle endocriniens annuels. These de doctorat, Universite de Montpellier, Montpellier, France.; 1975.
Jallageas M., Assenmacher I., Follett B. (1974) Testosterone secretion and plasma luteinizing hormone concentration during a sexual cycle in the Pekin duck, and after thyroxine treatment. Gen. Comp. Endocrinol. 23:472-475.
Kordon C., Gogan F. (1970) Interaction du feedback et de la photostimulation dans les régulations gonadotropes chez les mammiferes et les oiseaux. Coll. Int. CNRS. 172:325-350.
Lincoln G. (1977) Changes in pituitary responsiveness to luteinizing hormone releasing hormone in rams exposed to artificial photoperiods. J. Endocrinol. 73:519-527.
Lofts B., Coombs C. (1965) Photoperiodism and the testicular refractory peroid in the mallard. J. Zool. 146:44-54.
Paulke E., Haase E. (1978) A comparison of seasonal changes in the concentration of androgens in the peripheral blood of wild and domestic ducks. Gen. Comp. Endocrinol. 34:381-390.
Scanes C., Godden P., Sharp P. (1977) An homologous radioimmunoassay for chicken follicle‐stimulating hormone. Observations on the ovulatory cycle. J. Endocrinol. 73:473-481.
Storey C., Nicholls T. (1978) Observations on the regulation of sexual quiescence in juvenile and adult male Mallard (Anas platyrhynchos). J. Zool. 184:181-186.
Wilson S., Sharp P. (1975) Episodic release of luteinizing hormone in the domestic fowl. J. Endocrinol. 64:77-86.
