Long term effect of post-weaning rhythm on the body fat and performance of rabbit doe.

Reproduction, nutrition, development Pub Date : 2006-03-01 Epub Date: 2006-04-06 DOI:10.1051/rnd:2006009
Cesare Castellini, Alessandro Dal Bosco, Raffaella Cardinali
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引用次数: 47

Abstract

Reproductive protocols based on standard (Control: 11 days post-partum) or extended rhythm (PW: post-weaning at 27 days post-partum) were compared. Two groups of fifty 19-week-old New Zealand White females were inseminated for seven consecutive cycles. The kits were weaned at 26 days. On the day of AI, all the does were submitted to ultrasound scanning of the perirenal regions to measure fat thickness. The fertility rate and several indexes of efficiency were calculated. Fat thickness, estimated perirenal fat and live weight were higher in PW does. The does submitted to post-weaning rhythm had a higher sexual receptivity (P < 0.01), and fertility rate (P < 0.01) whereas litter size and pre-weaning mortality were not affected. Primiparous Control does showed a particularly low fertility rate; the value increased successively but was always lower than in PW does. PW rhythm in comparison with the standard one seemed more adapted to doe reproductive physiology even if there was a lower production (35.0 vs. 38.8 rabbit sold/year) and risk of fatness (18% of multiparous does).

断奶后节律对兔母鹿体脂和生产性能的长期影响。
比较基于标准(对照:产后11天)或延长节律(PW:产后27天断奶后)的生殖方案。两组50只19周大的新西兰白种雌鼠进行连续7个周期的人工授精。26日龄断奶。在人工智能当天,所有小鼠均接受肾周超声扫描,测量脂肪厚度。计算了生育率和若干效率指标。脂肪厚度、估计肾周脂肪和活重在PW组较高。断奶后节律母羊的性接受度和生育率均高于断奶前节律母羊(P < 0.01),产仔数和断奶前死亡率不受影响。初产控制确实显示出特别低的生育率;该值依次升高,但始终低于PW。即使产量较低(35.0对38.8只/年)和肥胖风险较低(18%的多产兔),与标准的相比,PW节律似乎更适应母鹿的生殖生理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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