Age-dependent trait variation: the relative contribution of within-individual change, selective appearance and disappearance in a long-lived seabird.
Age-dependent trait variation: the relative contribution of within-individual change, selective appearance and disappearance in a long-lived seabird.
复制标题
年龄依赖性性状变异：长寿海鸟个体内变化、选择性出现和消失的相对贡献
DOI：
10.1111/1365-2656.12321
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Bouwhuis S
中科院分区：
文献类型：
--
作者：
Zhang H;Vedder O;Becker PH;Bouwhuis S
在种群内，表型性状的表达通常会随着年龄的变化而变化。这种与年龄相关的性状变异可能是由于个体内某些表型的变化(改良、衰老、终末效应)和/或某些表型在较大年龄组中的选择性(DIS)引起的。在本研究中，我们应用两种方法(分解和混合建模)将7个物候和生殖性状的年龄相关变异归因于个体内变化和选择性(DIS)外观，在长寿海鸟(Sterna Hirundo)中。在种群水平上，除了繁殖概率外，所有性状都随着年龄的增长而改善(即物候进步和繁殖产量增加)。这两种方法都认为个人内部的变化是主要的负责过程，而在个人内部，表现一直提高到6-13岁，然后趋于平稳。相反，在个体内部，繁殖概率下降到10岁，然后趋于稳定。选择性出现和消失的影响很小，但表明寿命较长的个体具有更高的繁殖概率和更早的繁殖，年轻新兵在整个一生中的物候和生殖表现都好于年长新兵。在死亡的前一年，个体提前繁殖，这意味着最终投资。分解方法将更多的年龄相关性状变异归因于选择性消失：分别为14-36%和0-8%，我们认为这是由于个体内部变化率和选择性(脱颖率)之间的协方差导致分解方法得出的结果有偏差。我们得出结论，分解方法是可视化从一个年龄段到下一个年龄段群体表现变化的理想过程，但需要使用混合建模方法来研究年龄效应的重要性和相对贡献率。所研究的7个表型性状之间不同年龄过程的贡献存在显著差异，以及物种之间年龄相关性状表达模式的显著差异，需要更好地预测随年龄变化的最佳分配策略。
Within populations, the expression of phenotypic traits typically varies with age. Such age‐dependent trait variation can be caused by within‐individual change (improvement, senescence, terminal effects) and/or selective (dis)appearance of certain phenotypes among older age classes.In this study, we applied two methods (decomposition and mixed modelling) to attribute age‐dependent variation in seven phenological and reproductive traits to within‐individual change and selective (dis)appearance, in a long‐lived seabird, the common tern (Sterna hirundo).At the population level, all traits, except the probability to breed, improved with age (i.e. phenology advanced and reproductive output increased). Both methods identified within‐individual change as the main responsible process, and, within individuals, performance improved until age 6–13, before levelling off. In contrast, within individuals, breeding probability decreased to age 10, then levelled off.Effects of selective appearance and disappearance were small, but showed that longer‐lived individuals had a higher breeding probability and bred earlier and that younger recruits performed better throughout life than older recruits in terms of both phenology and reproductive performance. In the year prior to death, individuals advanced reproduction, suggesting terminal investment.The decomposition method attributed more age‐dependent trait variation to selective disappearance than the mixed‐modelling method: 14–36% versus 0–8%, respectively, which we identify to be due to covariance between rates of within‐individual change and selective (dis)appearance leading to biased results from the decomposition method.We conclude that the decomposition method is ideal for visualizing processes underlying population change in performance from one age class to the next, but that a mixed‐modelling method is required to investigate the significance and relative contribution of age effects.Considerable variation in the contribution of the different age processes between the seven phenotypic traits studied, as well as notable differences between species in patterns of age‐dependent trait expression, calls for better predictions regarding optimal allocation strategies with age.
登录
查看更多内容
燕鸥陷入困境：繁殖成功率低和招募对德国瓦登海普通燕鸥种群的人口影响
影响因子：
1.3
作者：
K. Lesley;Szostek bullet;P. Becker;Zusammenfassung Seeschwalben
通讯作者：
Zusammenfassung Seeschwalben
影响因子：
8.8
作者：
M. Robinson;K. U. Mar;V. Lummaa
通讯作者：
M. Robinson;K. U. Mar;V. Lummaa
影响因子：
4.8
作者：
Aubry, Lise M.;Koons, David N.;Cam, Emmanuelle
通讯作者：
Cam, Emmanuelle
“终端投资”和领鹟（Ficedula albicollis）的性冲突
DOI：
10.1086/285445
发表时间：
1992
期刊：
The American Naturalist
影响因子：
--
作者：
T. Part;L. Gustafsson;J. Moreno
通讯作者：
J. Moreno
测试普通燕鸥生存的年龄特异性
DOI：
--
发表时间：
2002
期刊：
影响因子：
--
作者：
I. Nisbet;E. Cam
通讯作者：
E. Cam