Wplyw niedoborowego zywienia owiec na regulacje hormonalne zwiazane ze wzrostem i rozrodem; posredniczaca rola neuropeptydu Y

• Autorzy: Palkowska J , Wojcik-Gladysz A. , Wankowska M.
• Języki publikacji: PL

Abstrakty

EN

The relationship between nutrition level and processes of growth and reproduction in animals are generally regulated by two endocrine systems: hypothalamo-pituitary somatotrophic and/or gonadotrophic axes. Diets deficient in energy and protein, elicit disturbances in the growth hormone secretion both in growing and mature sheep. Paradoxical enhancing the concentration of this hormone and parameters of its pulsatile release are due to suppression of the hypothalamic somatostatin and result in diminishing of the daily body gains and final body weight. The energetic and protein restrictions in sheep nutrition elicit also the disturbances in hypothalamo-pituitary-gonadotrophic axis in adult and growing sheep. The LH synthesis in pituitary cells and its pulsatile release to circulating blood are being reduced due to lowering of the parameters of pulsatile GnRH release of from the hypothalamus. In physiological response, the suppression of processes leading to the puberty in lambs and disturbances in course of the oestrus cycle in mature sheep, are observed. The study performed on sheep confirm the hypothesis that the neuropeptide Y could be a neuromodulatory link between animal nutrition and growth. However, the role of neuropeptide Y as a neuromodulatory interface between nutrition and reproduction needs the further elucidation.

Słowa kluczowe

PL

neuropeptyd Y; zywienie zwierzat; gonadotropia; wzrost zwierzat; niedozywienie; hormony; zwierzeta gospodarskie; rozrod zwierzat; owce; neuropeptydy

• Wydawca: -
• Czasopismo: Postępy Nauk Rolniczych
• Rocznik: 2004
• Tom: 51
• Numer: 4
• Opis fizyczny: s.3-15,fot.,rys.,bibliogr.

Twórcy

autor

Palkowska J

• Instytut Fizjologii i Zywienia Zwierzat im.Jana Kielanowskiego PAN, ul.Instytucka 3, 05-110 Jablonna

autor

Wojcik-Gladysz A.

autor

Wankowska M.

Bibliografia

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