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Analyse des variations des paramètres spermatique chez les Béliers de "Race" Ouled Djelal destinés à l'insémination ovinehttps://www.univ-soukahras.dz/en/publication/article/1940 |
Yamina BELKHIRI (2019) Analyse des variations des paramètres spermatique chez les Béliers de "Race" Ouled Djelal destinés à l'insémination ovine. University of Souk Ahras |
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Abstract
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Ovine Artificial insemination (AI) plays a principal role in the rapid dissemination of the genetic potential of animprover male resulting from breeding schemes, particularly in the improvement of zootechnical performances (reproduction, milkor meat) and also forguaranteepure-bred breeding, and the safeguarding of racial genetic potential in lose.The importance of harvesting males over the year in artificial insemination centers is linked to the seasonality of the sheep species. For this purpose, the assessment of breeding parameters and their variation during the year is a key step in order to guarantee the possibility of harvesting males over all seasons, and to derive the greatest benefit from them. as for their use in breeding and genetic safeguarding.
The study on " Analysis of variations in sperm parameters in Ouled-Djellal breed rams intended for ovine insemination" is carried out at the artificial insemination center (CNIAAG) in Biskra (Ouled Djellal) where breeding rams collected by the artificial vagina method, and atthe technical institute of livestock (ITELV) in Ain M'Lila (Oum Bouaghi) where rams collected by the electro-ejaculator method. The present study also contributes to the study of the onset of puberty in lambs Ouled Djellal in order to advance the age of collection in this breed.
For sperm collected by theartificial vagina method, the results show that sperm characteristics (except color, consistency, pH and mass motility) do not vary significantly with the seasons (p> 0.05).However, the season affects testicular conformation, body weight and serum testosterone levels. Finally, age has no influence on the quality of the seed in the age groups studied (2 to 4 years).
The sperm that is collected by the electro-ejaculator method, the results of the testicular parameters varied significantly (0.05> p <0.01) depending on the season, showing the highest average values in autumn. However, the variation of body weight, GSI, serum testosterone levels, mass motility, individual motility and sperm concentration were not significant during the stady period. The results reported show that the lowest and highest levels of semen volume were recorded in winter and in autumn respectively.
From the study on the advent of puberty,it appears that spermatogenesis begins in seminiferous tubules when the spermatogonie cells were observed at the 3d month. From 4th month, the number of Leydig cells increases, which contributed to the increase of the testosterone concentration. Puberty is established at the age of 8 months in male lambs of the OuledDjellal breed, whose average weight is 40 kg.
Key words: Ram, Puberty,Ouled Djellal breed, Sperm, Testis, Testosterone.
Information
Item Type: | Thesis |
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Divisions: |
» Institute of Agricultural and Veterinary Sciences |
ePrint ID: | 1940 |
Date Deposited: | 2019-09-09 |
Further Information: | Google Scholar |
URI: | https://www.univ-soukahras.dz/en/publication/article/1940 |
BibTex
@phdthesis{uniusa1940,
title={Analyse des variations des paramètres spermatique chez les Béliers de "Race" Ouled Djelal destinés à l'insémination ovine},
author={Yamina BELKHIRI},
year={2019},
school={University of Souk Ahras}
}
title={Analyse des variations des paramètres spermatique chez les Béliers de "Race" Ouled Djelal destinés à l'insémination ovine},
author={Yamina BELKHIRI},
year={2019},
school={University of Souk Ahras}
}