Breeding patterns of female prairie voles (Microtus ochrogaster) displaying alternative reproductive tactics.
Breeding patterns of female prairie voles (Microtus ochrogaster) displaying alternative reproductive tactics.
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雌性草原田鼠（Microtus ochrogaster）的繁殖模式显示出替代的繁殖策略。
DOI：
10.1093/jmammal/gyaa058
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发表时间：
2020
影响因子：
1.7
通讯作者：
Keane,Brian
中科院分区：
文献类型：
--
作者：
Lichter,JamesB;Lambert,ConnorT;Solomon,NancyG;Keane,Brian
任何一种性别的个体都可能表现出替代行为来获得交配，但很少有研究研究在两种性别的个体表现出替代生殖策略（ART）的群体中雌性和雄性的繁殖模式。在草原田鼠（Microtus ochrogaster）中，大多数成虫都具有领地意识，以雌雄配对或单独个体的形式居住在同一个巢穴中。然而，一些成年人采取非领地性的游荡策略。在两个野外季节监测半自然围栏中的草原田鼠种群时，我们发现证据表明，表现出不同 ART 的雌性与常驻和游荡的雄性进行了不同的繁殖。与单独居住的雌性或流浪的雌性相比，与雄性一起居住在巢中的雌性与配对的常驻雄性（主要是它们的社会伙伴）繁殖的频率明显更高，而与雄性流浪者的频率明显较低。这些模式并不是偶然造成的，因为根据种群中雄性流浪者的相对丰度，配对的常住雌性与配对的常住雄性生育的后代明显多于预期，而根据人口中男性流浪者的比例，单身雌性与雄性流浪者生育的后代明显多于预期。我们没有发现任何证据表明单身雌性和流浪雌性的后代中多重父子关系更大，尽管这些雌性缺乏男性社会伙伴来限制多个雄性的交配机会。这表明，在表现出不同生殖策略的雌性幼崽中，由雌性的男性社会伙伴守护的配偶并不是多重父子关系的主要决定因素。然而，男性 ART 确实影响了多胎父亲的可能性。与与配对的常住雄性生下后代的雌性相比，与单一常住或流浪雄性生下后代的雌性具有多重父子关系的可能性更高。这项研究的结果表明，雌性和雄性 ART 可以影响繁殖模式。
Individuals of either sex may display alternative behaviors to obtain copulations, but few studies have examined the breeding patterns of females and males in populations where individuals of both sexes exhibit alternative reproductive tactics (ARTs). In prairie voles (Microtus ochrogaster), most adults are territorial, residing at a single nest site either as male–female pairs or as solitary individuals. However, some adults adopt nonterritorial, wandering tactics. During two field seasons monitoring prairie vole populations maintained in seminatural enclosures, we found evidence that females exhibiting different ARTs bred differentially with resident and wandering males. Females residing at a nest with a male bred significantly more often with a paired resident male, primarily their social partner, and significantly less often with male wanderers compared to single resident females or wandering females. These patterns were not due to chance, because paired resident females produced offspring with paired resident males significantly more than expected based on the relative abundance of these males in the population, whereas single resident females produced offspring with male wanderers significantly more than expected based on the proportion of male wanderers in the population. We did not find any evidence that multiple paternity was greater in the litters of single resident females and wanderer females even though these females lacked a male social partner to limit mating access by multiple males. This suggests that mate guarding by a female’s male social partner was not the primary determinant of multiple paternity in the litters of females exhibiting different reproductive tactics. However, male ART did affect the likelihood of multiple paternity. Females that produced offspring with single resident or wanderer males had an increased likelihood of multiple paternity relative to females producing offspring with paired resident males. The results of this study show that female and male ARTs can affect breeding patterns.