الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 122 |  |  |
| | | from | 122 | | |
Abstract
The present study on the factors affecting rabbit performance has included Gestation periochiliter size,Litter weight,Milk yield and Mortality. The re tilt r v hat: 1- The average gestation lengths of the New Zealand White, California Cross and Native in hot climate were (31.95+ 0.12), (32.08+ 0.14)(31.62±0.28) and (32.51±0.09) respectirely, while the respective values in temperate climate were (32.38±, 0.18),(32.51+ 0.14), (32.11+ 0.34) and (32,83± 0,11). 2-Thegestation length decreased as the litter size at birth Increased. 3-The breed affected insignificantly gestatin period. 4-The lqter size at birth, 21 days and at weaning was Increased as parity advanced ( from the 1 It till 3 rsi parity) 5-The litter size was significantly affected by breed at birth, 21 days and at weaning age. 6-The litter size at birth, 21 days and at weaning age was Increased as weight of doe increased. 7-The litter size at birth, days. and at weaing age during the temperate climate is greater than that of hot climate. 8-The litter weight at birth, 21 days and at weaning increased as parity advanced from the first-up to the third one 9-The litter weight was significantly affected by breed. However. New Zealand and cross has the Wog litter weight at birth,litter weight at 21 and litter weight at weaning the Native has the lowest one. 10-The litter weight at birth, 21 days and at weaning age was increased as weight of does increased. 11-The litter weight at birth, 21 days and at weaning age during the temperate climate is greater than that of the hot climate. 12-The total litter weight at birth, 2,1 days and weaning increased with the increase of litter size. 13-The milk yield estimated by the weigh-nurse-weigh was significant higher than that estimated by weigh-sudkle•weigh method. from our results revealed that the most accurate method for estimation of milk production that the .first one. 14-The New zealand doe produce milk more than California and crossbred doe,th• Native does were lower for total milk yield. 15-The lowest milk yield was produced when litter size was less than five kits, while the largest milk yield was recorded at litter of seven and more kits. 16-The milk yield gradually increased from the first parity until the third one. 17-The milk yield produced by does weighing more than 3500 gm was higher than those weighing less than 3500 gm. 18-The milk yield during the temperato climate IN more significant than that of the hot climate. 19-The pregnancy has been shown to causo reduction of milk production. 20-The crossbred litter showed lower mortlity, while the native one recorded the highest one. 21-The mortality rate increased with the increased litter size, with the parity advancmenr and with increasing ambient temperature.