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The impact of changes in the content system on the reproductive function of one-year-old roosters

Abstract

The article reflects the results of the study on the effect of stress (changing the conditions of roosters’ keeping: from floor sistem to individual cages) on the sperm quality of males from the bioresource collection «Collection of the Rare and Vanishing Chicken Breeds» (RRIFAGB). In the experience were used roosters 56-58 weeks of age. The duration of the adaptation period to changing conditions (immobilization stress) was determined. Males were evaluated for suitability to artificial insemination and their sperm cryoconservation. The experiment were used roosters 17 breeds. The criterion for selecting cocks for the experiment was the primary response to massage according to the method of Burrows W.A., Quinn J.P., all selected individuals gave a positive response. For eye sperm evaluation, the selected poultry flock was divided into two groups: the 1st group (n = 64) with a live weight ≥ 3 kg and more (breeds: Leningrad golden-gray, Pushkinskaya, Tsarskoselsky, Poltava clay, Pervomai Light, Orloff Mille Fleur, Uzbek Game, Yurlov Kräher , Australorp black); Group 2 (n = 25) with a live weight < 3 kg (breeds: Pantsirev Black, Kuchino Jubilee, Czech golden, Frizzle, Russian Crested, Black Speckled Australorp, Minorca). To determine the effect of stress, ejaculate volume were compared in 3 steps. Obtained results reflected the dynamics of ejaculate volume. The test population had a ejaculate volume from 0.1 ml to 1.1 ml. Sperm activity of the breeds in the 1st group (live weight ≥ 3 kg) at the 1st assessment varied from 8.7 to 9.9 scores. Sperm activity at the 2nd assessment was lower: from 5.9 to 9.1 scores. The increasing of sperm activity come at 18-21 days after cocks transfer to individual cages. The next, the 3rd assessment of evaluation of sperm activity showed a stable result from 8.5 to 9.5. As a result of the experience on the study of quality indicators of sperm in the 2nd group of roosters, high variability indicators were obtained at all steps (Cv) of 32.0-54.0%, which suggests a low threshold of sensitivity to stress (high stress ability) to changing the poultry keeping system . The received stress loading during the study affects the general condition of the poultry. As known, it influences the formation of the immune response and reduces reproductive function.

About the Authors

Y. .. Silyukova
Russian research institute of farm animal genetics and breeding - branch of the L.K. Ernst Federal science center for animal husbandry
Russian Federation


N. .. Pleshanov
Russian research institute of farm animal genetics and breeding - branch of the L.K. Ernst Federal science center for animal husbandry
Russian Federation


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For citations:


Silyukova Y..., Pleshanov N... The impact of changes in the content system on the reproductive function of one-year-old roosters. Genetics and breeding of animals. 2019;(1):43-48. (In Russ.)

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ISSN 2410-2733 (Print)