Courtship behavior, nesting microhabitat, and assortative mating in sympatric stickleback species pairs.
Courtship behavior, nesting microhabitat, and assortative mating in sympatric stickleback species pairs.
复制标题
同域刺鱼物种对的求偶行为、筑巢微生境和分类交配。
DOI：
10.1002/ece3.7164
复制
发表时间：
2021-03
影响因子：
2.6
通讯作者：
MacColl ADC
中科院分区：
文献类型：
--
作者：
Dean LL;Dunstan HR;Reddish A;MacColl ADC
面对基因流动，生殖隔离的维持是一个特别有争议的话题，但生殖行为的差异可能是解释这一现象的关键。然而，我们还没有完全理解行为如何有助于维持物种边界。行为差异在生殖过程中有多重要？在最近分化的种群中，选择性交配在多大程度上维持了生殖隔离？“神奇特征”有多重要？分类交配可能是不同种群之间积累差异的副产品，也可能是对这些种群之间接触的适应性反应，但这一点经常被忽视。在这里，我们解决这些问题，使用最近描述的物种对三刺棘鱼（Gasterosteus aculeatus），从两个不同的位置和表型中间的异域种群的北尤伊斯特岛，苏格兰西部群岛。我们确定了明显的差异，首选的筑巢基板和求偶行为的物种对男性。我们发现，所有的男性选择性法院自己的生态型和所有的女性更喜欢相同的生态型的男性，无论他们是从物种对或异地种群的女性。我们还发现，配偶选择似乎并不受体型差异（一种潜在的“神奇特质”）的影响。通过明确地比较物种对和单一生态型位置之间的这些交配偏好的强度，我们能够表明，由于直接交配选择而导致的目前水平的排斥性交配可能是生态型之间其他适应的副产品，并且不受物种对的明显选择的影响。我们的研究结果表明，生态分歧的交配特征，特别是嵌套的微生境可能比直接的配偶选择更重要的是在维持生殖隔离棘鱼物种对。行为在物种形成中的作用是什么？我们确定了一些关键的行为差异，有助于生殖隔离的模型系统，三棘鱼（Gasterosteus aculeatus）物种复合体。然而，我们发现，无论生态型之间的接触，都存在间接交配，因此，在二次接触区域的交配行为的直接选择可能不会发挥重要作用。
The maintenance of reproductive isolation in the face of gene flow is a particularly contentious topic, but differences in reproductive behavior may provide the key to explaining this phenomenon. However, we do not yet fully understand how behavior contributes to maintaining species boundaries. How important are behavioral differences during reproduction? To what extent does assortative mating maintain reproductive isolation in recently diverged populations and how important are “magic traits”? Assortative mating can arise as a by‐product of accumulated differences between divergent populations as well as an adaptive response to contact between those populations, but this is often overlooked. Here we address these questions using recently described species pairs of three‐spined stickleback (Gasterosteus aculeatus), from two separate locations and a phenotypically intermediate allopatric population on the island of North Uist, Scottish Western Isles. We identified stark differences in the preferred nesting substrate and courtship behavior of species pair males. We showed that all males selectively court females of their own ecotype and all females prefer males of the same ecotype, regardless of whether they are from species pairs or allopatric populations. We also showed that mate choice does not appear to be driven by body size differences (a potential “magic trait”). By explicitly comparing the strength of these mating preferences between species pairs and single‐ecotype locations, we were able to show that present levels of assortative mating due to direct mate choice are likely a by‐product of other adaptations between ecotypes, and not subject to obvious selection in species pairs. Our results suggest that ecological divergence in mating characteristics, particularly nesting microhabitat may be more important than direct mate choice in maintaining reproductive isolation in stickleback species pairs. What is the role of behavior in speciation? We identify a number of key behavioural differences that contribute to reproductive isolation in a model system, the three‐spined stickleback (Gasterosteus aculeatus) species complex. However, we show that assortative mating is present regardless of contact between ecotypes, and thus, direct selection on mating behavior in regions of secondary contact may not play an important role.
登录
查看更多内容
影响因子：
2.3
作者：
Ballantyne, Colin K.
通讯作者：
Ballantyne, Colin K.
DOI：
10.1111/j.1095-8312.1990.tb00512.x
发表时间：
1990-03-01
影响因子：
1.9
作者：
BLOUW, DM;HAGEN, DW
通讯作者：
HAGEN, DW
影响因子：
3.7
作者：
McKinnon JS;Hamele N;Frey N;Chou J;McAleavey L;Greene J;Paulson W
通讯作者：
Paulson W
影响因子：
3.3
作者：
Conte, Gina L.;Schluter, Dolph
通讯作者：
Schluter, Dolph
影响因子：
2.4
作者：
Delcourt, Matthieu;Raesaenen, Katja;Hendry, Andrew P.
通讯作者：
Hendry, Andrew P.