ALGERIAN SHEEP ARE NONSEASONAL BREEDERS: "CLINICAL, CYTOLOGICAL AND HISTOLOGICAL STUDIES"

Authors

  • A NIAR Centre Universitaire de Tiaret
  • K ZIDANE Centre Universitaire de Tiaret
  • A KABIR Centre Universitaire de Tiaret
  • B BENALLOU Centre Universitaire de Tiaret
  • S Y AL-DAHACHE Université El Fateh, Tripoli
  • R OUZROUT Université d'Annaba

Keywords:

Ewes, Curve of lambing, seasonal and non seasonal breeding, vaginal exfoliative cytology, vaginal histology

Abstract

4377 pregnant ewes have been used in this study to realise a curve of lambing. This curve prove that the three most important breeds of Algerian sheep can breed all year round.

                To prove also that Algerian sheep are no  seasonal breeder, a cytological and histological study of ewes vaginal mucosa have been done. The exfoliative cytology over all the phases of the oestrous cycle and pregnancy consistent in appearance and appear to be influenced directly by the changes in endogenous ovarian steroid hormones.

The histological features of the anterior vaginal epithelium of the ewe sampled all year round, before, during, after oestrus and at pregnancy are described. In the present study, we have never found an arrest of the cyclical genital activity of ewes at any moment of the year. This finding agree with results of the curve of lambing. We can conclude that Algerian ewes are nonseasonal breeders.

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Author Biographies

A NIAR, Centre Universitaire de Tiaret

Institut des Sciences Vétérinaires

K ZIDANE, Centre Universitaire de Tiaret

Institut des Sciences Vétérinaires

A KABIR, Centre Universitaire de Tiaret

Institut des Sciences Vétérinaires

B BENALLOU, Centre Universitaire de Tiaret

Institut des Sciences Vétérinaires

S Y AL-DAHACHE, Université El Fateh, Tripoli

Faculté de Médecine Vétérinaire

R OUZROUT, Université d'Annaba

Département Agro-Vétérinaire
Faculté des Sciences, El Taref

References

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- Miroud K. and Noakes D.E., Br. Vet., (1990), pp. 146-387.

- Done T.T. and Heard T.W., Veterinary record, (1965), pp. 88-64.

- Richardson C., Vet. Rec., (1972), pp. 90-264.

- Martoja R. et Martoja M., "Initiation aux techniques histologiques", Masson Editions, (1967).

- Bonnes G. Desclaude J. et Gadoud R., "Reproduction des mammifères d’élevage", INRA Collections, (1988).

- Goot H., J. Agr. Sci., (1969), pp. 73-77.

- Arthur G.H., Noakes D.E. and Pearson H., "Veterinary reproduction and obstetrics", 6th edition, (1992).

- Cole H.H. and Miller R.F., Am. J. Anat., (1935), pp. 57-39.

- Robinson T.J. and Moore N.W., J. Endocr., (1956), pp. 19-288.

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Published

2001-12-01

How to Cite

NIAR, A., ZIDANE, K., KABIR, A., BENALLOU, B., AL-DAHACHE, S. Y., & OUZROUT, R. (2001). ALGERIAN SHEEP ARE NONSEASONAL BREEDERS: "CLINICAL, CYTOLOGICAL AND HISTOLOGICAL STUDIES". Sciences & Technology. A, Exactes Sciences, (16), 81–84. Retrieved from https://revue.umc.edu.dz/a/article/view/1770

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