Influence of grazing management on the seasonal change in testicular morphology in Corriedale rams

Animal Reproduction Science

Volumn 56, Issue 2, 1999, Pages 93-105

  Bielli, A ^a,b   Pedrana, G ^b   Gastel, M T ^b   Castrillejo, A ^c   Morana A ^b   Lundeheim, N ^a   Forsberg, M ^a   Rodriguez Martinez, H ^a  

^a Swedish University of Agricultural Sciences   (Sweden)

^b UNIVERSITY OF URUGUAY   (Uruguay)

^c Km 234 Ruta 5 Carlos Reyles ^*  (Uruguay)

Author keywords

Feeding and nutrition; Morphometry; Seasonal dynamics; Sheep male reproduction; Testis

Indexed keywords

TESTOSTERONE;

ANIMAL; ANIMAL DISEASE; ANIMAL FOOD; ANIMAL HUSBANDRY; ARTICLE; BLOOD; CASTRATION; HISTOLOGY; IMAGE PROCESSING; MALE; PHOTOPERIODICITY; PHYSIOLOGY; RADIOIMMUNOASSAY; RANDOMIZATION; REGRESSION ANALYSIS; SEASON; SERTOLI CELL; SHEEP; SPERMATID; SPERMATOZOON COUNT; TESTIS; ULTRASTRUCTURE; URUGUAY;

ANIMAL HUSBANDRY; ANIMAL NUTRITION PHYSIOLOGY; ANIMALS; CASTRATION; IMAGE PROCESSING, COMPUTER-ASSISTED; MALE; PHOTOPERIOD; RADIOIMMUNOASSAY; RANDOM ALLOCATION; REGRESSION ANALYSIS; SEASONS; SERTOLI CELLS; SHEEP; SPERM COUNT; SPERMATIDS; TESTIS; TESTOSTERONE; URUGUAY;

EID: 0033612493     PISSN: 03784320     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0378-4320(99)00027-5     Document Type: Article

References (36)

1. Almeida G., Alberio R., Murtagh J.J. Estudio de las variaciones de la actividad reproductiva en un grupo de carneros Corriedale a lo largo de un año. Prod. Anim. (Bs As). 8:1981;343-354.
2. Amann, R., 1970. In: Johnson, A.D., Gomes, W.R., Vandemark, N.L. (Eds.), Sperm Production Rates, The Testis. Academic Press, New York, pp. 461-463.
3. Amir D., Volcani R. Seasonal fluctuations in the sexual activity of Awassi, German Mutton Merino, Corriedale, Border-Leicester and Dorset Horn rams: I. Seasonal changes in semen plasma volume and its fructose and citric acid concentration. J. Agric. Sci. 64:1965;115-120.
4. Amir D., Volcani R. Seasonal fluctuations in the sexual activity of Awassi, German Mutton Merino, Corriedale, Border-Leicester and Dorset Horn rams: II. Seasonal changes in semen characteristics. J. Agric. Sci. 64:1965;121-125.
5. Bielli, A., Pedrana, G., Gastel, M.T., Moraña, J.A., Castrillejo, A., Piaggio, J., Forsberg, M., Rodriguez-Martinez, H., 1996. La suplementación nutricional evita la caída invernal en la reproducción estacional del carnero Corriedale uruguayo? Memorias 2do Simposio Internacional de Producción Animal. Instituto de Reproducción Animal, Carlos Paz, Córdoba, Argentina, p. 247.
6. Bielli A., Gastel M.T., Pérez Clariget R., López A., Castrillejo A., Regueiro M., Forsberg M., Lundeheim N., Rodriguez-Martinez H. Influence of nutrition on seasonal variations in testicular morphology and function in Corriedale rams. J. Reprod. Dev. 43:1997;171-180.
7. Briggs, H.M., 1970. Modern Breeds of Livestock. MacMillan, New York, pp. 479-487.
8. Castrillejo A., Moraña J.A., Bielli A., Gastel M.T., Molina J.R., Forsberg M., Rodriguez-Martinez H. Onset of spermatogenesis in Corriedale ram lambs under extensive rearing conditions in Uruguay. Acta Vet. Scand. 36:1995;161-173.
9. Christensen A.K., Peacock K. Increase in Leydig cell number in testes of adult rats treated chronically with an excess of human chorionic gonadotropin. Biol. Reprod. 22:1980;383-391.
10. Elias H., Hyde D.M. An elementary introduction to stereology (quantitative microscopy). Am. J. Anat. 159:1980;412-446.
11. Fernandez Abella D., Villegas N., Echeverría D., Robaina J. Evaluación de las variaciones estacionales en la producción espermática de cuatro razas ovinas. Bol. Téc. Cienc. Biol. (Salto, Uruguay). 3:1993;23-34.
12. Gastel M.T., Bielli A., Pérez R., López A., Castrillejo A., Tagle R., Franco J., Laborde D., Forsberg M., Rodriguez-Martinez H. Seasonal variations in testicular morphology in Uruguayan Corriedale rams. Anim. Reprod. Sci. 40:1995;59-75.
13. Glover, T.D., D'Occhio, M.J., Millar, R.P., 1990. Male life cycle and seasonality. In: Lamming, G.E. (Ed.), Marshall's Physiology of Reproduction. Churchill Livingstone, Edinburgh, pp. 268-281.
14. Hochereau-de Reviers M.T., Loir M., Pelletier J. Seasonal variations in the response of the testis and LH levels to hemicastration of adult rams. J. Reprod. Fertil. 46:1976;203-209.
15. Hochereau-de Reviers M.T., Perreau C., Lincoln G.A. Photoperiodic variations of somatic and germ cell populations in the Soay ram testis. J. Reprod. Fertil. 74:1985;329-334.
16. Hochereau-de Reviers M.T., Monet-Kuntz C., Courot M. Spermatogenesis and Sertoli cell numbers and function in rams and bulls. J. Reprod. Fertil. 34:1987;329-334. Suppl.
17. Horn R., Pastor L.M., Moreno E., Calvo A., Canteras M., Pallares J. Morphological and morphometric study of early changes in the ageing golden hamster testis. J. Anat. 188:1996;109-117.
18. Hötzel M.J., Martin G.B., Walkden-Brown S.W., Fisher J.S. Nutritional effects on testicular growth and gonadotrophin secretion in Suffolk and Merino rams in the breeding and non-breeding seasons. Proc. Aust. Soc. Reprod. Biol. 26:1994;48.
19. Johnson L. Spermatogenesis and ageing in the human. J. Androl. 7:1986;331-354.
20. Johnson L. Efficiency of spermatogenesis. Microsc. Res. Tech. 32:1995;385-422.
21. Johnson L., Thompson D. Age-related and seasonal variation in the Sertoli cell population, daily sperm production and serum concentration of follicle-stimulating hormone, luteinizing hormone and testosterone in stallions. Biol. Reprod. 29:1983;777-789.
22. Livestock Virtual Library, 1997. Internet, http://www.ansi.okstate.edu/library/, December.
23. Marshall G.R., Plant T.M. Puberty occurring either spontaneously or induced precociously in Rhesus monkey (Macaca mulatta) is associated with a marked proliferation of Sertoli cells. Biol. Reprod. 54:1996;1192-1199.
24. Martin G.B., Sutherland S.R.D., Lindsay D.R. Effects of nutritional supplements on testicular size and the secretion of LH and testosterone in Merino and Booroola rams. Anim. Reprod. Sci. 12:1987;267-281.
25. Martin, G.B., Walkden-Brown, S.W., Boukhliq, R., Tjondronegoro, S., Miller, D.W., Fisher, J.S., Hötzel, M.J., Restall, B.J., Adams, N.R., 1994. Non-photoperiodic inputs into seasonal breeding in male ruminants. In: Davey, K.G., Peter, R.E., Tobe, S.S. (Eds.), Perspective in Comparative Endocrinology. National Research Council of Canada, Ottawa, pp. 574-585.
26. Murray P.J., Rowe J.B., Pethick D.W. Effect of season and nutrition on scrotal circumference of Merino rams. Aust. J. Exp. Agric. 31:1991;753-756.
27. Nipken C., Wrobel K.H. A quantitative morphological study of age-related changes in the donkey testis in the period between puberty and senium. Andrologia. 29:1997;149-161.
28. Pérez, R., 1998. Studies on seasonal variation in testicular function in Corriedale rams with special emphasis on nutritional effects. PhD Thesis, Swedish University of Agricultural Sciences, Uppsala, 56 pp.
29. Pérez R., López A., Castrillejo A., Bielli A., Laborde D., Gastel T., Tagle R., Queirolo D., Franco J., Forsberg M., Rodriguez-Martinez H. Reproductive seasonality of Corriedale rams under extensive rearing conditions. Acta Vet. Scand. 38:1997;109-117.
30. Setchell B.P. Domestication and reproduction. Anim. Reprod. Sci. 28:1992;195-202.
31. Statistical Analysis System Institute, 1993. SAS/STAT Guide for Personal Computers, Version 6th edn. SAS Institute, Cary, NC, USA.
32. Steger K., Wrobel K.H. Postnatal development of ovine seminiferous tubules: an electron microscopical and morphometric study. Ann. Anat. 178:1996;201-213.
33. Walkden-Brown S.W., Restall B.J., Taylor W.A. Testicular and epididymal sperm content in grazing Cashmere bucks: seasonal variation and predictions from measurements in vivo. Reprod. Fertil. Dev. 6:1994;727-736.
34. Wang C., Leung A., Sinha-Hikim A.P. Reproductive ageing in the male Brown-Norway rat: a model for the human. Endocrinology. 133:1993;2773-2781.
35. Weibel, E.R., 1979. Stereological Methods, Practical Methods for Biological Morphometry, Vol. 1. Academic Press, London, 415 pp.
36. Wrobel K.H., Reichold J., Schimmel M. Quantitative morphology of the ovine seminiferous epithelium. Ann. Anat. 177:1995;19-32.