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Low renesting propensity and reproductive success make renesting unproductive for the threatened Piping Plover (Charadrius melodus)
The Condor: Ornithological Applications ( IF 2.6 ) Pub Date : 2020-02-18 , DOI: 10.1093/condor/duz066
Rose J Swift 1 , Michael J Anteau 1 , Megan M Ring 1 , Dustin L Toy 1 , Mark H Sherfy 1
Affiliation  

Upon reproductive failure, many bird species make a secondary attempt at nesting (hereafter, “renesting”). Renesting may be an effective strategy to maximize current and lifetime reproductive success, but individuals face uncertainty in the probability of success because reproductive attempts initiated later in the breeding season often have reduced nest, pre-fledging, and post-fledging brood survival. We evaluated renesting propensity, renesting intervals, and renest reproductive success of Piping Plovers (Charadrius melodus) by following 1,922 nests and 1,785 unique breeding adults from 2014 to 2016 in the Northern Great Plains of the United States. The apparent renesting rate for individuals was 25% for reproductive attempts that failed in the nest stage (egg laying and incubation) and only 1.2% for reproductive attempts when broods were lost. Renesting propensity declined if reproductive attempts failed during the brood-rearing stage, nests were depredated, reproductive failure occurred later in the breeding season, or individuals had previously renested that year. Additionally, plovers that nested on reservoirs were less likely to renest compared to other habitats. Renesting intervals declined when individuals had not already renested, were after-second-year adults without known prior breeding experience, and moved short distances between nest attempts. Renesting intervals also decreased if the attempt failed later in the season. Overall, reproductive success and daily nest survival were lower for renests than first nests throughout the breeding season. Furthermore, renests on reservoirs had reduced apparent reproductive success and daily nest survival unless the predicted amount of habitat on reservoirs increased within the breeding season. Our results provide important demographic measures for this threatened species and suggest that predation- and water-management strategies that maximize success of early nests would be more likely to increase productivity. Altogether, renesting appears to be an unproductive reproductive strategy to replace lost reproductive attempts for Piping Plovers breeding in the Northern Great Plains.

中文翻译:

低的繁殖倾向和繁殖成功使濒临灭绝的管道l(Charadrius melodus)的繁殖无效。

繁殖失败后,许多鸟类会再次尝试筑巢(以下称“筑巢”)。繁殖可能是使当前和终生生殖成功最大化的有效策略,但是个体在成功可能性方面面临不确定性,因为在繁殖季节后期开始的生殖尝试通常会减少巢,出雏和出雏后的成活率。我们评估了管道lov(Charadrius melodus)的re息倾向,re息间隔和最繁琐的生殖成功),并于2014年至2016年期间追踪美国北部大平原的1,922个巢穴和1,785个独特的成年成虫。在巢期失败的繁殖尝试(蛋的产卵和孵化)中,个体的表观繁殖率是25%,而在失去亲体的繁殖尝试中,个体的表观繁殖率只有1.2%。如果在育雏阶段繁殖尝试失败,巢被淘汰,繁殖失败在繁殖季节后期发生或当年以前曾有人繁殖,则繁殖倾向会下降。此外,与其他栖息地相比,筑巢在水库上的小白鼠更不会沉迷。当个体尚未被嵌套,是第二次成年的成年后,没有已知的繁殖经验,并且两次筑巢之间的距离很短时,繁殖间隔就会缩短。如果尝试在本赛季晚些时候失败,则重新租房的间隔也会减少。总体而言,在整个繁殖季节,雷纳斯的繁殖成功率和每日巢生存率均低于第一窝。此外,除非在繁殖季节内预计水库上的栖息地数量增加,水库上的动物繁殖会降低其明显的繁殖成功率和日常巢生存。我们的结果为这种受威胁物种提供了重要的人口统计学指标,并表明使早期巢穴成功最大化的捕食和水管理策略更有可能提高生产力。总体而言,巢养似乎是一种非生产性的繁殖策略,用以代替北大平原北部繁殖的管道繁殖者丧失的繁殖尝试。总体而言,在整个繁殖季节,雷纳斯的繁殖成功率和每日巢生存率均低于第一窝。此外,除非在繁殖季节内预计水库上的栖息地数量增加,否则水库上的巢会降低其明显的繁殖成功率和日巢生存率。我们的研究结果为这一受威胁物种提供了重要的人口统计学指标,并表明使早期巢穴成功最大化的捕食和水管理策略更有可能提高生产力。总体而言,巢养似乎是一种非生产性的繁殖策略,用以代替北大平原北部繁殖的管道繁殖者丧失的繁殖尝试。总体而言,在整个繁殖季节,雷纳斯的繁殖成功率和每日巢生存率均低于第一窝。此外,除非在繁殖季节内预计水库上的栖息地数量增加,水库上的动物繁殖会降低其明显的繁殖成功率和日常巢生存。我们的结果为这种受威胁物种提供了重要的人口统计学指标,并表明使早期巢穴成功最大化的捕食和水管理策略更有可能提高生产力。总体而言,巢养似乎是一种非生产性的繁殖策略,用以代替北大平原北部繁殖的管道繁殖者丧失的繁殖尝试。除非预计繁殖季节内水库的栖息地数量会增加,否则水库上的巢会降低其明显的繁殖成功率和日常巢生存。我们的研究结果为这一受威胁物种提供了重要的人口统计学指标,并表明使早期巢穴成功最大化的捕食和水管理策略更有可能提高生产力。总体而言,巢养似乎是一种非生产性的繁殖策略,用以代替北大平原北部繁殖的管道繁殖者丧失的繁殖尝试。除非预计繁殖季节内水库的栖息地数量会增加,否则水库上的巢会降低其明显的繁殖成功率和日巢生存率。我们的结果为这种受威胁物种提供了重要的人口统计学指标,并表明使早期巢穴成功最大化的捕食和水管理策略更有可能提高生产力。总体而言,巢养似乎是一种非生产性的繁殖策略,用以代替北大平原北部繁殖的管道繁殖者丧失的繁殖尝试。我们的结果为这种受威胁物种提供了重要的人口统计学指标,并表明使早期巢穴成功最大化的捕食和水管理策略更有可能提高生产力。总体而言,巢养似乎是一种非生产性的繁殖策略,用以代替北大平原北部繁殖的管道繁殖者丧失的繁殖尝试。我们的结果为这种受威胁物种提供了重要的人口统计学指标,并表明使早期巢穴成功最大化的捕食和水管理策略更有可能提高生产力。总体而言,巢养似乎是一种非生产性的繁殖策略,用以代替北大平原北部繁殖的管道繁殖者丧失的繁殖尝试。
更新日期:2020-02-18
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