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首页> 外文会议>Annual Conference of the Southeastern Association of Fish and Wildlife Agencies >Northern bobwhite population characteristics, productivity, and hen survival in west central Louisiana
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Northern bobwhite population characteristics, productivity, and hen survival in west central Louisiana

机译：北方鲍威特人口特征，生产力和西部中部的生存在路易斯安那州

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We examined aspects of northern bobwhite (Colinus virginianus; hereafter quail) population dynamics in longleaf pine (Pinus palustris) forests on the Vernon Ranger District, Kisatchie National Forest, located in west central Louisiana. We used sex,age, and weight data from 246 birds captured a total of 404 times during 9 February-20 June 1991-1993 in baited traps to describe population characteristics. We used data from 128 (106 F:22 M) birds trapped, radio tagged, and monitored during 3 field seasons to describe productivity and survival of these birds during March through August. The best-fit linear-logistic model (G2 = 7.42, 5 df, P = 0.1912) indicated that proportions of second year (SY) birds captured during spring depended on year; but sexratios of captured birds were independent of year. Thus, we estimated that the breeding population contained 42.4 +- 3.1 percent (mean +- 1 SE) females and the proportion of SY birds varied among 62.5 +- 7.1 percent, 46.2 +- 5.3 percent, and 66.4 +- 4.6percent during 1991, 1992, and 1993 respectively. Adult birds were consistently (no significant interactions with year or day, P>0.1) 4.1 percent heavier than SY birds (168 +- 1.2 g vs. 161 +- 1.1 g). We observed no difference in the relationship betweenbody mass and sample date among years (P >0.1), but females experienced a curvilinear change in mass compared to males, which decreased at a rate of 0.12 +- 0.03 g/day. Average clutch size for 39 completed nests pooled over years was 13.3 +- 0.4. Pooledestimated nest success was 48 +- 8 percent. Of 40 nests found, 19 produced hatchlings for an average production rate of 5.9 +- 1.0 hathlings per clutch, but 12.4 +- 0.4 hatchlings per successful nest. Proportional hazards regression models indicated that hen survival was not affected by age (P = 0 25), but that hens were 1.8 times as likely to die (P = 0.05) during 1992 than during 1991 and 1993. Estimated 150-day (Mar-Jul) survival rates for hens were 16 +- 4 percent during 1992 and 36 +- 4 percent during 1991 and 1993, which were lower or similar to several other studies of breeding season mortality.
机译：我们研究了北部鲍林·弗吉尼亚州的科林斯弗吉尼亚州的科林斯·弗吉尼亚州人群的方面;在位于路易斯安那州西部的Kisatchie国家森林，Kisatchie National Forest的Longleaf Pine（Pinus Palustris）森林中的人口动态。我们在1991-1993年6月9日在1991-1993六年举行的陷阱中，我们使用性别，年龄和体重数据占据了1991年6月9日的404次以描述人口特征。我们使用128（106 F：22米）鸟类的数据被困，无线电标记，并在3月3日至8月期间监测3月的生产力和生存。最佳拟合线性逻辑模型（G2 = 7.42,5 df，p = 0.1912）表示，春季期间捕获的第二年（SY）鸟类的比例依赖于一年;但捕获的鸟类的性别是独立于一年的。因此，我们估计育种群体含有42.4 + - 3.1％（平均±1 SE）女性，SY鸟类的比例在62.5±7.1％，46.2 + - 5.3％和66.4 + - 4.6期间在1991年期间，1992年和1993年。成年鸟类始终如一（与年份或日没有显着的相互作用，P> 0.1）比SY鸟类重4.1％（168 + - 1.2g与161 + - 1.1g）。我们观察到对象之间的关系和样品日期之间的关系没有差异（p> 0.1），但与雄性相比，女性经历了曲目的曲线变化，其速率为0.12±0.03克/天。 39个已完成的巢穴的平均离合器尺寸超过数年池为13.3 + - 0.4。 Pooledestimated Nest成功为48 + - 8％。发现40个巢穴，19个生产幼龟，平均生产率为每离合器5.9 + - 1.0赫卡，但每成功巢12.4 + - 0.4幼龟。比例危害回归模型表明，母鸡存活率不受年龄（p = 025）的影响，但母鸡在1992年期间死亡的1.8倍（p = 0.05），而不是1991年和1993年。估计为150天（Mar- Jul）母鸡的存活率在1992年的1992年和36 + - 4％的1991年和1993年的36 + - 4％，其较低或类似于育种季节死亡率的其他几项研究。

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