Evolution of age at primiparity in pinnipeds in the absence of the quality–quantity trade‐off in reproduction

Evolution of age at primiparity in pinnipeds in the absence of the quality–quantity trade‐off in reproduction
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在繁殖过程中缺乏质量权衡的情况下鳍足类动物初产年龄的演变

DOI:
10.1002/ece3.5138
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发表时间:
2019
影响因子:
2.6
通讯作者:
Krüger
Krüger
中科院分区:
生物学2区
文献类型:
--
作者:
Kalberer;DeRango;Trillmich;Krüger

文献摘要

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相似文献

产次年龄(AP)是一个关键的生活史特征,对生活史策略的进化至关重要。这种特征在单胎动物的鳍足类(海象、耳海豹和真海豹)中特别有趣。因此,通常观察到的后代质量和数量之间的权衡并不适用于这个taxon.Therefore,AP的进化的比较研究可能揭示其他重要的进化相关时,产仔数是固定的。使用系统发育广义最小二乘分析,我们发现一个强大的负相关和强大的相对出生质量(平均幼崽出生质量的比例,平均成年女性质量)和AP之间的相关性。这一结果表明,鳍足类动物要么表现出更快的繁殖速度(即,较高的相对后代质量导致较短的哺乳期长度,因此较短的出生间隔)或较慢的生活史,早期AP和较重的相对后代质量共同进化为相对较快的生活史策略。另一方面,AP与哺乳期长度呈正相关:较晚的繁殖开始与较长的哺乳期长度相关。因此,AP在鳍足类的变化似乎是受成本和利益之间的相互作用,通过相对出生质量和哺乳期长度介导的相对投资到单一的后代早期繁殖。
Age at primiparity (AP) is a key life history trait which is crucial to the evolution of life history strategies. This trait is particularly interesting in pinnipeds (walrus, eared seals, and true seals), which are monotocous animals. Thus, the commonly observed trade‐off between offspring quality and quantity does not apply to this taxon. Therefore, comparative studies on the evolution of AP might shed light on other important evolutionary correlates when litter size is fixed. Using phylogenetic generalized least squares analyses, we found a strong negative and robust correlation between relative birth mass (mean pup birth mass as a proportion of mean adult female mass) and AP. Rather than trading‐off an early start of reproduction with light relative offspring mass, this result suggests that pinnipeds exhibit either faster (i.e., higher relative offspring mass leading to shorter lactation length, and thus shorter interbirth interval) or slower life histories and that an early AP and a heavy relative offspring mass co‐evolved into a comparatively fast life history strategy. On the other hand, AP was positively related to lactation length: A later start of reproduction was associated with a longer lactation length. Consequently, variation in AP in pinnipeds seems to be affected by an interplay between costs and benefits of early reproduction mediated by relative investment into the single offspring via relative birth mass and lactation length.
DOI: 10.1086/400074
发表时间: 1954-01-01
影响因子: 6.5
作者:
COLE, LC
通讯作者: COLE, LC
父母对鳍足类的投资
DOI: --
发表时间: 1996
期刊:
影响因子: --
作者:
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通讯作者: F. Trillmich
各位长寿之人。
DOI: --
发表时间: 2004
影响因子: 16.8
作者:
M. L. de Brooke;Victoria Copas;Rachel Gylee;O. Krüger
通讯作者: O. Krüger
DOI: 10.1016/0040-5809(80)90015-5
发表时间: 1980-01-01
影响因子: 1.4
作者:
CASWELL, H;HASTINGS, A
通讯作者: HASTINGS, A
体重、系统发育、栖息地和营养水平对哺乳动物首次繁殖年龄的影响
DOI: --
发表时间: 1987
期刊: Evolution; international journal of organic evolution
影响因子: --
作者:
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通讯作者: J. Wootton