دراسة تطور النمو الجسمي في الجاموس المحلي من الولادة حتى البلوغ

الملخص EN

This study has been carried out at two regions (Al-Qurna and Al- Mudayna) by using 27 of local buffaloes (11 calves, 16 heifers) during 2008- 2009 which are belonged to dams with five lambing seasons and their age groups rangs studying 3.5-5 , 5.5- 7.5 and 8 years and over.

The current study aims at study the effect of age of calve and heifer, sex of borns, dam age, lambing parity on different body measurements, and to study the effect of borns sex, age of dam and lambing parity on birth weight of calves and heifers.

The results can be summarized as follows : Age of calve and heifers appears significantly (P<0.05 or P<0.01) effect on all body measurements, where these measurements are increased with the progress of the age of the calves and heifers, initially from birth to 22 months of age, chest girth and hip girth dimensions inquire larger change in all periods where are (12.296 and 11.333 cm) from birth to 4 months of age,(18.519 and 18.408 cm) for period from 10-16 month and (66.111 and 64.741 cm) for period from birth to 22 months of age.

As well as it is found that portional growth for body length, wither height, rump height, chest girth and hip girth dimensions from birth up to 22 months of age are 68.49, 70.84, 46.55, 63.47 and 57.16 % respectively.

It can depend on these changes for early prediction of body measurements which have higher correlations with others at age of 22 months.

It is noticed in this study that sex of borns, age of dam, parity lambing have been affected significantly (P<0.05) on different body measurements which are increased with the progress age of dams.

The overall means for birth weight of buffaloe borns is 37.617 kg, this trait is influenced significantly (P<0.05) by sex of buffaloe born, age of dam