不管它们的伴侣是谁,雌性蓝山雀的后代都是一样的

IF 2.5 3区 环境科学与生态学 Q2 BEHAVIORAL SCIENCES
Ségolène Delaitre, Claire Doutrelant, Samuel P Caro
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引用次数: 0

摘要

如果雌性不能成功地与符合自己偏好的雄性配对,那么雌性是否会调整自己的生殖投资?在一项为期两年的实验中,我们要求雌性蓝山雀(Cyanistes caeruleus)在6只雄性山雀中进行选择,然后依次将它们与它们最喜欢的和最避免的雄性山雀配对。我们通过筑巢活动、繁殖时间、卵的大小和数量、受精卵的数量和后代的性别比例来监测雌性的生殖投资。我们发现,雌性更喜欢与自己颜色相匹配的雄性(头冠的蓝色紫外线色度),但它们也更喜欢颜色较低的雄性(脸颊和头冠的颜色较不鲜艳)。尽管在繁殖季节,雌性与它们喜欢的雄性配对往往会建造更重的巢穴,但我们没有发现配对处理对繁殖时间或雌性生殖投资的任何其他方面的影响的证据。然而,我们发现,尽管配对处理相反,但两年内雌性的产卵日期,卵数,卵大小和产卵性别比例显着重复。这些发现表明,在雌性蓝山雀中,与它们配对的雄性并没有实质性地改变它们的繁殖决定。
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Whoever their partner, female blue tits breed the same
Abstract Do females modify their reproductive investment if they do not succeed in pairing with a male that matches their preference? In a two-year experiment, we asked female blue tits (Cyanistes caeruleus) to select among six males, and then successively paired them with their preferred and their most avoided male. We monitored female reproductive investment through nest building activity, timing of breeding, size and number of eggs, number of fertilized eggs, and brood sex ratio. We found that females preferred males with a chromatic coloration (blue UV chroma of the head crown) that matched their own, but also that they preferred males with a lower achromatic coloration (less bright color of the cheeks and head crown). Although females paired with their preferred males tended to build heavier nests during the breeding season, we found no evidence of an effect of the pairing treatment on timing of breeding, or any other aspects of female reproductive investment. We however found that laying dates, clutch sizes, egg sizes, and brood sex ratio were significantly repeatable within females between the two years, despite the opposite pairing treatments. These findings show that in female blue tits, the males with which they are paired do not substantially alter their reproductive decisions.
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来源期刊
Behavioral Ecology
Behavioral Ecology 环境科学-动物学
CiteScore
5.20
自引率
8.30%
发文量
93
审稿时长
3.0 months
期刊介绍: Studies on the whole range of behaving organisms, including plants, invertebrates, vertebrates, and humans, are included. Behavioral Ecology construes the field in its broadest sense to include 1) the use of ecological and evolutionary processes to explain the occurrence and adaptive significance of behavior patterns; 2) the use of behavioral processes to predict ecological patterns, and 3) empirical, comparative analyses relating behavior to the environment in which it occurs.
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