摘要
使用在长期研究橙腹田鼠的社会组织中收集的数据 ,我们研究了该物种配对的形成和解体。大多数在春季形成的配对包括了各公社群 (包括至少两个同性个体的群 )过冬后的生存者。无论雌、雄个体是否来自相同或不同的的公社群 ,配对的个体都不是同一家庭的成员。春秋季形成的新配对 ,通常包括一直在研究地游荡的无亲缘关系的个体。所以 ,我们的野外数据表明 ,橙腹田鼠避免与家庭成员配对 ;但是没证据表明自由生活的橙腹田鼠以体重为基础来进行配偶选择 ,也没证据表明在野外或半自然的实验室条件下 ,雌性个体偏好有性经历的雄性个体。在我们研究的种群中 ,配对分离的个体都具有一个特征 ,即分离前的繁殖成功率比未分离的配对个体低。在任何特定的时间内 ,由于雌、雄性个体的潜在配偶的数量有限 ,所以 ,几乎没有个体有机会同时比较两个或更多潜在配偶的特征。结果表明 :我们所研究的种群中的配对是机会主义式的 。
We used live trapping data collected during a long term study of the social organization of prairie vole Microtus ochrogaster ,to investigate pair formation and break up in this species.Most male female pairs that formed in spring consisted of survivors of communal groups.Whether pairs formed from males and females from the same or different communal groups,the individuals were not family members.When new pairs formed during summer autumn they typically consisted of unrelated individuals that had been wandering throughout the study site.Thus,our field data indicate that prairie voles avoided pairing with family members.We found no evidence that free living females based their choice of mate on body mass,or that females preferred sexually experienced to sexually inexperienced males in the field or under semi natural laboratory conditions.In our study population,pairs that separated were characterized by lower reproductive success,prior to separation,than were pairs that remained together.At any given time,the number of potential mates for males and females was limited.Thus,it seems likely that few individuals had the opportunity to compare simultaneously the characteristics of two or more potential mates.We suggest that pair formation in our study population most likely was opportunistic,with individuals pairing with the first available mate .
出处
《动物学报》
SCIE
CAS
CSCD
北大核心
2004年第4期527-534,共8页
ACTA ZOOLOGICA SINICA
基金
ThisresearchwasfundedinpartbygrantsNSFDEB 78 2 5 864andNIHHD 0 93 2 8andbytheUniversityofIllinoisSchoolofLifeSciencesandGraduateCollegeResearchBoard .
关键词
橙腹田鼠
配偶选择
种群
繁殖
Prairie voles, Microtus ochrogaster ,Mate choice
