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Revista Colombiana de Ciencias Pecuarias

Print version ISSN 0120-0690


ALMAGUER, Yanara; FONT, Harold; CABRERA, Suitberto  and  ARIAS, Yaritza. Relationship between body and testicular measurements in young buffalo bulls in Cuba. Rev Colom Cienc Pecua [online]. 2017, vol.30, n.2, pp.138-146. ISSN 0120-0690.


appropriate selection of sires holds great importance in plans to genetically improve and raise buffalos.


to obtain a statistical model that provides accurate associations between body and testicular measurements intended for selection of Bufalypso breed sires.


measurements of body weight (BW), thoracic perimeter (TP), and scrotal circumference (SC) from 649 buffalos aged 2 to 36 months, were used to obtain the models corresponding to the associations between these traits. The statistical significance of the model and the model’s parameters were evaluated using a one-way analysis of variance. The best-fit model was established by calculating determination coefficients (R2) and mean squared error (SE).


the most adequate regression model between thoracic perimeter and body weight was TP = 19.89*BW0.37, with 99% and 0.03 for R2 and, SE, respectively. The best association between scrotal circumference and body weight was obtained with the model SC = 1.13*BW0.51, with values of 89% for R2 and of 0.1 for SE. The model that best expressed the relationship between scrotal circumference and thoracic perimeter was SC = 0.02*TP0.89, with R2 = 89% and SE = 0.01.


nonlinear models described better the association between body and testicular measurements than the linear ones. These results suggest that nonlinear models are effective for selecting buffalo sires.

Keywords : body weight; modeling; nonlinear regression; scrotal circumference; thoracic perimeter.

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