Comparison of non-linear models for describing the growth of scrotal circumference in Awassi male lambs

Small Ruminant Research

Volumn 52, Issue 1-2, 2004, Pages 155-160

  Bilgin, Omer C ^a   Emsen, Ebru ^a   Davis, Michael E ^b  

^a ATATÜRK UNIVERSITY   (Turkey)

^b OHIO STATE UNIVERSITY   (United States)

Author keywords

Awassi sheep; Growth curves; Scrotal circumference

Indexed keywords

ANIMALIA; LAMB; OVIS ARIES;

EID: 1542380607     PISSN: 09214488     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0921-4488(03)00251-7     Document Type: Article

References (25)

1. Akbas Y., Oguz I. Growth curve parameters of lines of Japanese quail (Coturnix coturnix japonica), unselected and selected for four-week body weight. Arch. Geflugelkd. 62(3):1998;104-109.
2. Delgado C., Valera M., Molina J.M., Jimenez J.M., Rodero A. Scrotal circumference as indicator of reproductive performance in authoctonous beef cattle: growth curve analysis in Retino bulls. Arch. Zootech. 49:2000;229-240.
3. Fekedulegn D., Mac Siurtain M.P., Colbert J.J. Parameter estimation of non-linear growth models in forestry. Silva Fennica. 33(4):1999;327-336.
4. Foote, R.H., 1969. Physiological aspect of artificial insemination. In: Cole, H.H., Cupps, P. (Eds.), Reproduction in Domestic Animals. Academic Press, New York, pp. 313-353.
5. Fossceco, S.L., 1991. Logistic growth curve parameter estimates for scrotal circumference and relationships with female reproduction. Ph.D. Dissertation. University of Virginia.
6. Ghannam S.A.M., Madhat M.N., Eltawil E.A. Puberty in Awassi ram lambs. II. Development of the testes, epididymis and seminal vesicles. Zeitschrift-fur-Tierzuchtung-und-Zuchtungsbiologie. 94(3-4):1978;235-241.
7. Grosjean, P., 2001. Growth model of the reared sea urchin Paracentrotus lividus. Ph.D. Thesis. Fakulte des Sciences, Universite Libre de Bruxelles.
8. Hansen P.J. Livest. Prod. Sci. 12:1985;309-327.
9. Land R.B. The expression of female, sex-limited characters in the male. Nature (London). 24:1973;208-209.
10. Land R.B., Carr W.R. Testes growth and plasma lh concentration following hemicastration and its relation with female prolificacy in sheep. J. Reprod. Fertil. 41:1975;495-501.
11. Mignon-Grasteau S., Beaumont C. Les courbes de crossiance chez les oiseaux. INRA Prod. Anim. 13(5):2000;337-348.
12. Mukasa-Mugerwa E., Ezaz Z. Relationship of testicular growth and size to age. Theriogenology. 38:1992;979-988.
13. Notter D.R., Lucas J.R., McClaugherty F.S., Copenhaver J.S. Breed group differences in testicular growth patterns in spring-born ram lambs. J. Anim. Sci. 60:1985;622-631.
14. Quirino C.R., Bergmann J.A.G., Vale Filho V.R., Andrade V.J., Pereira J.C.C. Evaluation of four mathematical functions to describe scrotal circumference maturation in Nellore bulls. Theriogenology. 52:1999;25-34.
15. Ratkowsky, D.A., 1990. Handbook of Non-linear Regression Modeling. Marcel Dekker, New York.
16. Rice, A.R., Andrews, F.N., Warwick, E.J., Legates, J.E., 1957. Breeding and Improvement of Farm Animals. 5th edition. Mc Grath-Hill Book Co. Inc. New York.
17. Ricordeau G., Pelletier J., Courot M., Thimonier J. Phenotypic and genetic relationships between endocrine criteria and testicular measurements of young Romanov rams and the ovulation rates at eight months of their half sisters. Ann. Genet. Sel. Anim. 11:1979;145-159.
18. Salhab S.A., Zarkawi M., Wardeh M.F., Al-Masri M.R., Kassem R. Development of testicular dimensions and size, and their relationship to age, body weight and parental size in growing Awassi ram lambs. Small Rumin. Res. 40:2001;187-191.
19. SAS Institute Inc., 1985. SAS/STAT User's Guide, Version 6, 4th ed., vol. 1. SAS Institute Inc., Cary, NC.
20. Tanaka M. A new growth curve which express infinite increase. Publ. Amakusa Mar. Biol. Lab. 6:1982;167-177.
21. Terawaki Y., Sueda E., Matuzaki S., Akami Y., Fukui Y. Relationships between testicular growth and body measurements in Holstein bulls. Anim. Sci. Technol. 65:1994;1044-1050.
22. Torre G.L., Candotti J.J., Reverter A., Bellido M.M., Vasco P., Garcia L.J., Brinks J.S. Effects of growth parameters on cow efficiency. J. Anim. Sci. 70:1992;2668-2672.
23. Tsoularis A. Analyses of logistic growth curves. Res. Lett. Inf. Math. Sci. 2:2001;23-46.
24. Wildeus S., Entwistle K.W. Postpubertal changes in gonadal and extragonadal sperm reserves in Bos indicus strain bulls. Theriogenology. 17:1982;655-666.
25. Yarney T.A., Sanford L.M., Palmer W.M. Pubertal development of ram lambs: body weight and testicular size measurements as indices of postpubertal reproductive function. Can. J. Anim. Sci. 70:1989;139-147.