食物丰度和群体大小影响群居繁殖的八齿兽的繁殖表型

IF 1.9 2区 生物学 Q3 BEHAVIORAL SCIENCES
M. Matchinske, S. Abades, L. A. Ebensperger, L. A. Correa, L. D. Hayes
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引用次数: 0

摘要

社会生态条件预计会影响成年雌性生育后代的时间或物候。雌性可能会确定繁殖时间,使后代的出生最大限度地延长后代在生长季节的觅食时间。在群居繁殖者中,雌性可能会改变繁殖物候,通过同步繁殖和提高后代存活率来最大化群居生活的益处。我们使用了一个关于群居繁殖的八哥(Octodon degus)种群的11年数据集,以检验(i)繁殖物候是否受食物丰度、社会条件和雌性男性化程度的影响,以及(ii)在多雌性群体中,繁殖同步性是否受相似的食物获取途径、雌性男性化程度和群居产仔数的影响。产仔的物候(产仔日)与冬季(而非春季)洞穴系统的食物丰度呈负相关,并与春季每个社会单位的成年雌性数量呈负相关。在可获得食物较少的年份,群落内产仔的同步性会增加。我们的研究表明,degu雌性根据其依赖的后代可能经历的社会生态条件来确定繁殖时间。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Food abundance and group size influence the phenology of reproduction in communally breeding Octodon degus

Food abundance and group size influence the phenology of reproduction in communally breeding Octodon degus

Socioecological conditions are expected to influence the timing, or phenology, of when adult females give birth to offspring. Females may time reproduction such that offspring are born to maximize the length of the period that offspring have to forage during the growing season. In communal breeders, females may alter reproductive phenology to maximize benefits of group-living through synchronizing reproduction and improve offspring survival. We used an 11-year dataset on a population of communally breeding degus (Octodon degus) to test whether the (i) reproductive phenology was influenced by the abundance of food, social conditions, and the degree of masculinization of females and (ii) reproductive synchrony was influenced by similar access to food and degree of masculinization among females and communal litter size, in multi-female groups. The phenology of litter parturition (parturition day) was negatively associated with the abundance of food at burrow systems during winter (but not during spring) and was negatively associated with the number of adult females per social unit in the spring. Synchrony of litter production within communal groups increased in years with less available food. Our study suggests that degu females timed reproduction based the socioecological conditions likely to be experienced by their dependent offspring.

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来源期刊
CiteScore
3.90
自引率
8.70%
发文量
146
审稿时长
3 months
期刊介绍: The journal publishes reviews, original contributions and commentaries dealing with quantitative empirical and theoretical studies in the analysis of animal behavior at the level of the individual, group, population, community, and species.
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