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Efficacy of acclimating and releasing captive-reared and wild-translocated Northern bobwhites
Avian Biology Research ( IF 0.5 ) Pub Date : 2021-04-26 , DOI: 10.1177/17581559211010295
Kelly S Reyna 1 , Jeffrey G Whitt 1 , William L Newman 2
Affiliation  

Northern bobwhite populations are dwindling across their range. Accordingly, in areas with bobwhite habitat restoration and no nearby populations, effective population restoration techniques are needed. Here, we evaluated three bobwhite restoration release strategies: (1) release of captive-reared bobwhites on sites with and without resident populations, (2) translocation of wild-trapped bobwhites from a region of high population density to a region with no population, and (3) release of captive-reared and wild-translocated bobwhites acclimated on site prior to release in year 2. Wild-translocated birds survived longer than captive-reared birds. Mean survival for captive-reared bobwhites was 2.42 weeks, and 4.27 weeks in year 1, and 1.91 and 1.40 weeks in year 2, for study sites without resident and with resident birds present, respectively. Mean survival for wild-translocated birds was 8.50 weeks in year 1, and 11.54 weeks in year 2. Wild-translocated birds dispersed shorter distances than captive-reared birds. Both captive-reared and wild-translocated bobwhites only nested on study sites with conspecifics. Captive-reared birds had 0 nesting attempts on the site with no resident bobwhites, and ⩾8 nests on the site with resident bobwhites. Wild-translocated females nested six times and were subsequently observed with juveniles. On-site acclimation did not increase post-release survival for northern bobwhites. Acclimation increased site fidelity but reduced survival for captive-reared birds and had no impact on survival for wild-translocated bobwhites. Population restoration by release of captive-reared or wild-translocated birds is not irrelevant, but further investigation is needed into the relationship between captive-reared birds and predators, and methods to increase survival and reproduction of released birds.



中文翻译:

适应和释放圈养和野生移位的北短尾white的功效

北部美洲白white种群在其范围内逐渐减少。因此,在具有短白的栖息地恢复且附近没有种群的地区,需要有效的种群恢复技术。在这里,我们评估了三种bobwhite恢复释放策略:(1)在有和没有常住人口的地点释放圈养的bobwhites,(2)将野生诱捕的bobwhites从人口密度高的区域转移到无人口的区域, (3)在第2年释放之前在现场驯化饲养和野生易变迁的短吻鳄的释放比野生饲养的鸟类存活的时间更长。对于没有居住地和有居住鸟的研究地点,圈养繁殖的短吻鳄在第1年的平均生存期分别为2.42周和4.27周,在第2年的平均生存期分别为1.91和1.40周。第1年,野生易位鸟的平均生存时间为8.50周,第2年为11.54周。野生易位鸟的分布距离比圈养的鸟更短。圈养的和野生移位的短吻鳄都只嵌套在具特异性的研究地点。圈养的鸟在没有常住的短白的地方进行了0次筑巢尝试,在没有常驻的短白的地方进行了8次筑巢。野外移位的雌性筑巢六次,随后与少年一起被观察到。现场驯化并没有增加北部短毛猫的释放后存活率。驯化提高了站点保真度,但降低了圈养饲养鸟类的生存率,并且对野生易变迁的短吻鳄的生存率没有影响。通过释放圈养或野生移居的鸟类来恢复种群并非无关紧要,

更新日期:2021-04-27
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