半散养状态下东北虎交配行为的观察

Copulatory behavior of semifree-ranging Amur tigers(Panthera tigris altaica)

在2006-2007年,采用行为取样法对泰山东北虎园7只（3雌,4雄）半散养状态下（园区占地面积20000m2）的东北虎的交配活动进行了为期22d的观察,旨在了解无人干扰下东北虎的交配过程及其交配模式。结果显示：东北虎在交配过程中无锁结现象,雄虎通常在一次爬跨多次抽动后即出现射精。在1h内出现2次射精次数的比例占总射精次数的74.0%。东北虎的交配模式属于Dewsbury分类系统中的第11种,即无锁结、有抽动、单次插入、多次射精。交配期内,每只雌虎平均日邀配28±3次,平均邀配持续时间为20.0±1.2s;每只雄虎平均日爬跨14±1次。平均抽动持续时间为20.9±0.5s,平均交配持续时间为45.2±1.3s。

We used behavioral sampling to investigate mating behavior and copulatory patterns of 7 semi-free-ranging Amur tigers （Panthem tigris altaica ; 4 males, 3 females） housed in a 2 ha enelosure at the Taishan Anmr Tiger Park. We observed no copulatory locks during 22 days of observation; males usually ejaculated following a single intromission after several thrusts. Approximately 74% of ejaculations within a 1 -hour period were repeated ejaculations. Amur tigers had a copulatory pattern with no lock, thrusting, muhiple intromission, and a single ejaculation, consistent with No. 11 in Dewsbury＇ s copulatory-patterned system. Females averaged 28 ± 3 sexual solicitations/day, lasting 20. 0 ± 1.2 seconds. Males averaged 14 ± 1 mounts of females/day. The mean duration of thrusting was 20. 9 ±0. 5 seconds, and the mean mating duration was 45.2 ± 1.3 seconds.