The mating brain: early maturing sneaker males maintain investment into the brain also under fast body growth in Atlantic salmon (Salmo salar).
The mating brain: early maturing sneaker males maintain investment into the brain also under fast body growth in Atlantic salmon (Salmo salar).
复制标题
DOI：
10.1007/s10682-014-9715-x
复制
发表时间：
2014
影响因子：
1.9
通讯作者：
Kolm, Niclas
中科院分区：
文献类型：
--
作者：
Kotrschal, Alexander;Trombley, Susanne;Rogell, Bjorn;Brannstrom, Ioana;Foconi, Eric;Schmitz, Monika;Kolm, Niclas
有研究表明，交配行为需要高水平的认知能力。然而，由于对交配和大脑的投资都是昂贵的功能，它们的关系很可能是精力充沛的权衡。关于这一主题的经验数据仍然含糊不清。我们调查了大西洋鲑鱼(Salmo Salar)的早期性成熟是否与大脑发育有关，在这种情况下，雄性可以留在河里，在较小的体型下性成熟(运动鞋雄性)，或者迁徙到海里，推迟性成熟，直到它们长得更大(背水型雄性)。具体地说，我们测试性成熟如何通过在自然或随意喂养水平上饲养青少年来诱导大脑发育的可塑性变化。在他们的第一季之后，我们比较了两种类型的雄性交配策略和雌性交配策略的大脑大小和大脑区域体积。与自然饲养水平相比，在自由采食期间，雄性交配策略和雌性的身体生长都有很大的增加。然而，尽管身体大小有相似的相对增长，早熟的运动鞋男性在自由进食期间保持了比顺行的男性和女性更大的相对大脑大小。我们还发现，不同的喂养方式、性别和交配策略，不同大脑区域的相对大小存在一些差异。例如，运动鞋男性大脑认知中心端脑的相对大小最大。我们的数据支持，早期开始繁殖的个体在身体快速生长期间也保持了较大的相对大脑大小。我们认为，在复杂的交配行为中，认知需求保持着对繁殖个体大脑发育的高水平投资。本文的在线版本(doi：10.1007/s10682-0149715-x)包含补充材料，授权用户可以使用。
It has been suggested that mating behaviours require high levels of cognitive ability. However, since investment into mating and the brain both are costly features, their relationship is likely characterized by energetic trade-offs. Empirical data on the subject remains equivocal. We investigated if early sexual maturation was associated with brain development in Atlantic salmon (Salmo salar), in which males can either stay in the river and sexually mature at a small size (sneaker males) or migrate to the sea and delay sexual maturation until they have grown much larger (anadromous males). Specifically, we tested how sexual maturation may induce plastic changes in brain development by rearing juveniles on either natural or ad libitum feeding levels. After their first season we compared brain size and brain region volumes across both types of male mating tactics and females. Body growth increased greatly across both male mating tactics and females during ad libitum feeding as compared to natural feeding levels. However, despite similar relative increases in body size, early maturing sneaker males maintained larger relative brain size during ad libitum feeding levels as compared to anadromous males and females. We also detected several differences in the relative size of separate brain regions across feeding treatments, sexes and mating strategies. For instance, the relative size of the cognitive centre of the brain, the telencephalon, was largest in sneaker males. Our data support that a large relative brain size is maintained in individuals that start reproduction early also during fast body growth. We propose that the cognitive demands during complex mating behaviours maintain a high level of investment into brain development in reproducing individuals. The online version of this article (doi:10.1007/s10682-014-9715-x) contains supplementary material, which is available to authorized users.
登录
查看更多内容
DOI：
10.1139/z92-032
发表时间：
1992-02-01
期刊：
CANADIAN JOURNAL OF ZOOLOGY-REVUE CANADIENNE DE ZOOLOGIE
影响因子：
--
作者：
BERGLUND, I
通讯作者：
BERGLUND, I
DOI：
10.1073/pnas.87.16.6349
发表时间：
1990-08-01
影响因子：
11.1
作者：
JACOBS, LF;GAULIN, SJC;HOFFMAN, GE
通讯作者：
HOFFMAN, GE
影响因子：
1.7
作者：
Iwaniuk, AN;Nelson, JE
通讯作者：
Nelson, JE
DOI：
10.1111/j.2517-6161.1995.tb02031.x
发表时间：
1995-01-01
影响因子：
5.8
作者：
BENJAMINI, Y;HOCHBERG, Y
通讯作者：
HOCHBERG, Y
影响因子：
3.3
作者：
Gonzalez-Voyer, Alejandro;Winberg, Svante;Kolm, Niclas
通讯作者：
Kolm, Niclas