Sel’skokhozyaistvennaya Biologiya [Agricultural Biology], 2015, V. 50, № 6, pp. 719-728.

UDC 636.5:636.018:591.1

doi: 10.15389/agrobiology.2015.6.719eng

ABOUT PHYSIOLOGICAL AND MORPHOLOGICAL PROCESSES
IN POULTRY AT NATURAL AND INDUCED MOLTING

V.I. Fisinin, A.P. Konopleva

All-Russian Research and Technological Poultry Institute, Federal Agency of Scientific Organizations,
10, ul. Ptitsegradskaya, Sergiev Posad-11, Moscow Province, 141300 Russia,
e-mail fisinin@vnitip.ru

Received May 8, 2015

Plumage is a characteristic feature of birds. Feathering as a cutaneous derivative is a complex structure with specific mechanism of formation. Functions of plumage are thermal regulation, mechanical protection of bird’s body and flight. Color and form of feathers in different parts of the bird’s body could also serve as sexual characteristics. Molting in adult birds depends on season of a year, age of birds and management conditions as well. The process of molting is closely associated with reproductive function. A change in management conditions can induce full or partial molting in chicken, ducks, geese, turkeys, and guinea fowl. Stress factors can also induce molting thus affecting the productive cycle in poultry. Molting is a complex biological process. The change of feathering occurs as a result of altered interactions between endocrine glands of the body including pituitary, thyroid and sex glands. An influence of the hormones released by these glands on the molting-related metabolic processes is mediated by central nervous system (I.C. Dunn et al., 2009). The resulting morphological and physiological alterations allow a manipulation of the reproductive function to optimize timing and intensity of lay in females and sperm production in males. The data are presented to specify the processes in meat-type hens and cocks exposed to molt-inducing factors (A.P. Konopleva et al., 1976; Sh.A. Imangulov et al., 2000; P.F. Surai et al., 2012). The molting was induced by technological, chemical or hormonal factors. On days 7, 30 and 60 after the exposure to a molt-inducing factor the condition of pituitary and thyroid gland body heat production, Ca and thyroxin levels in serum were recorded. Molting related alterations substantially influenced digestibility of dietary nutrients, fat deposition in body and egg productivity in laying hens. Stressed cocks responded to stress factors rather with significantly lowered sperm production than with molting. The result is а 3-5 % decrease in egg fertility in the second productive period. The layers ceased the lay and started the second productive period in 45-60 days. The intensity of lay in this second period reached 60 %, its duration was 6 months. The chicks hatched from molted layers were found to be more livable if compared to the first productive period. The comparison of different methods of molting induction showed the technological approach to be more effective if compared to chemical or hormonal factors. The alterations disclosed during artificially induced molting in modern meat-type chicken strains were found similar to those in less productive poultry reported in special literature earlier.

Keywords: poultry, chicken, stress factor, endocrine glands, pituitary, thyroid gland, hormones.

 

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REFERENCES

  1. Damme K., Simon I., Flock D.K. Adaptability of laying hens to different environments: analysis of German random sample tests 2010/11 with floor management and enriched cages. Lohmann Information, 2012, 47: 9-14.
  2. Dunn I.C. Long life layer: genetic physiological limitations to extend the laying period. Proc. 19th European Symposium on Poultry Nutrition (August 26-29, 2013). Potsdam, Germany, 2013: 25-26.
  3. Dunn I.C., Ciccone N.A., Joseph N.T. Endocrinology and genetics of the hypothalamic-pituitary-gonadal axis. In: Biology of breeding poultry. P.H. Hocking (ed.). CAB International, 2009.
  4. Dougherty D.C., Sanders M.M. Estrogen action: revitalization of the chick oviduct model. Trends Endocrinol. Metab., 2005, 16: 414-419 CrossRef
  5. Sharp P.J., Dunn I.C., Cerolini S. Neuroendocrine control of reduced persistence of egg-laying in domestic hens — evidence for the development of photorefractoriness. J. Reprod. Fertil., 1992, 94: 221-235 CrossRef
  6. Nys Y., Guyot N. Egg formation and chemistry. In: Improving the safety and quality of eggs and egg products. Y. Nys, M. Bain, F. Van Immerseel (eds.). Cambridge, Woodhead Publishing, 2011.
  7. Williams K.C. Some factors affecting albumin quality with particular reference to Haugh unit score. World’s Poult. Sci. J., 1992, 48: 5-16 CrossRef
  8. Wolc A., White I.M.S., Hill W.G., Olori V.E. Inheritance of hatchability in broiler chickens and its relationship to egg quality traits. Poult. Sci., 2010, 89: 2334-2340 CrossRef
  9. Wolc A., Arango J., Settar P., O’Sullivan N.P., Olori V.E., White M.S., Hill W.G., Dekkers J.C.M. Genetic parameters of egg defects and egg quality in layer chickens. Poult. Sci., 2012, 91: 1292-1298 CrossRef
  10. Ciccone N.A., Sharp P.J., Wilson P.W., Dunn I.C. Changes in reproductive neuroendocrine mRNAs with decreasing ovarian function in ageing hens. Gen. Comp. Endocrinol., 2005, 144: 20-27 CrossRef
  11. Van Khe-min'. Ptitsevodstvo, 1959, 4: 25-27.
  12. Voitkevich A.A. Pero ptitsy [Plumage in birds]. Moscow, 1962.
  13. Larionov V.V. Uchenye zapiski MGU, 1945, 88: 58-65.
  14. Kochish I. Zhivotnovodstvo Rossii, 2007, 6: 15-17.
  15. Markov Yu.Ya. Prognozirovanie produktivnykh kachestv kur yaitsenoskikh linii na osnovaniiizucheniya protsessov rosta i smeny pera. Kandidatskaya dissertatsia [Prediction of production performance in hens of egg-laying lines based on growth and molting. PhD Thesis]. Moscow, 1973.
  16. Kotova O.D. V sbornike: Uspekhi zootekhnicheskikh nauk [In: Advances in zootechnic science. V. 2]. Moscow, 1936, tom 2: 475-486.
  17. Svetozarov E., Shtraikh G. Uspekhi sovremennoi biologii, 1943, 12(1): 25-51.
  18. Imangulov Sh.A., Dogadaeva I.V., Kavtarashvili A.Sh. Sel'skokhozyaistvennaya biologiya [Agricultural Biology], 2000, 6: 86-89.  
  19. Svetozarov E., Shtraikh G. Uchenye zapiski MGU, 1940, 24: 392-396.
  20. Yamomoto T. Referativnyi zhurnal VNIITEISKH (Moscow), 1973, 11: 22.
  21. Surai P.F., Fisinin V.I. Materialy ХVII konferentsii VNAP «Mirovoe zhivotnovodstvo: vyzovy budushchego» [Proc. ХVII WSAP Conf. «Animal Husbandry in the World: Challenges of the Future»]. Sergiev Posad, 2012: 24-34.
  22. Sukhomlin K., Katrich N., Dmitrienko S. Ekspress-informatsiya VNITIP, VNITEISKH (Zagorsk), 1976, 3: 20-23.
  23. Kapustin E. Ptitsevodstvo, 2013, 4: 9-10.
  24. Savitskii F.P., Konopleva A.P. Trudy VNITIP (Sergiev Posad), 1997, 72: 8-13.
  25. Konopleva V.I., Konopleva A.P. Prinuditel'naya lin'ka kak metod povysheniya vosproizvoditel'noi sposobnosti ptitsy. Metodicheskie rekomendatsii po biologicheskim osnovam povysheniya produktivnosti sel'skokhozyaisvtennoi ptitsy [Forced molting to increase reproductive performance in poultry: recommendations on biological bases of improvement production efficiency]. Erevan, 1987.
  26. Konopleva A.P., Fisinin V.I. Trudy VNITIP (Zagorsk), 1976, 40: 12-17.
  27. Fisinin V.I., Konopleva V.I., Konopleva A.P. Materialy konferentsii VASKHNIL «Zhivotnovodstvu — promyshlennuyu osnovu» [Proc. Conf. «Commercial Bases for Anumal Husbandry»]. Moscow, 1978: 49-58.
  28. Fisinin V.I., Stollyar T.A., Imangulov Sh.A., Kavtarashvili A.Sh., Bebin M.L., Samoilova L.F., Markov Yu.Ya., Kozhemyaka N.V., Naidenskii M.S., Bondarev E.I., Komilov D.K., Polyakov G.K., Osipova A.P., Akatov A.E., Sokolov V.V. Prinuditel'naya lin'ka kur: Metodicheskie rekomendatsii [Forced molting in hens: manual]. Sergiev Posad, 1997.

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