Effect of remating interval on reproductive and productive performance of rabbits
Abstract: A total number of 30 does and 6 bucks of mature New Zealand White (NZW) rabbits weighing 3.0 - 3.5 kg and aging 6 - 7 months were used in this experiment. Does were divided according to post-partum period of mating following the first parity into three groups. Does in group 1 (G1) were remated throughout day after parturition, does in group 2 (G2) were remated at 14 days post-partum (P.P) and does in group 3 (G3) were remated at 30 days post-partum (after weaning). Reproductive performance and productive efficiency of NZW females along side the hormonal profile and changes in genitalia were determined with in the next 3 consecutive parities (2nd, 3rd and 4th) denoted as 1, 2, 3 experimental parities for each group. The results revealed the following findings:1- The highest conception rate (CR) was observed in does mated at 30 days post-partum. 2-The highest litter size and weight at birth and at weaning found in does mated on the 14 days post-partum. 3- Litter size and weight at 8 weeks of age were higher in G2 than other groups. 4- The differences in that productive traits due to remating intervals and parity were significant. 5- The highest level of P4 hormone was found in females of G3 during pregnancy and females of G2 during lactation. 6 -The highest level of E2 was determined in females mated at 14 days post-partum during pregnancy and lactation. 7- Lower and higher levels of prolactin hormone were determined in females mated 30 days post-partum (after weaning) during pregnancy and lactation period, respectively. 8- The highest level of T3 hormone was determined in females of G3 during pregnancy and lactation. 9-The greatest number of corpora lutea was found in females mated at 30 days post-partum. 10- The highest number of live fetuses and rate of embryonic viability was recorded in females mated through 1 day after parturition.
Publication year 2001
Availability location مكتبة معهد بحوث الانتاج الحيوانى - شارع نادى الصيد - الدقى - الجيزة
Availability number 720
Organization Name
Department Rabbit, Turkey and Water Fowl Research Department
Author(s) from ARC
Agris Categories Animal physiology - Reproduction
AGROVOC
TERMS		 Mating systems. Rabbits. Reproductive performance.
Proposed Agrovoc re
Publication Type PhD Thesis
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