The mating brain : early maturing sneaker males maintain investment into the brain also under fast body growth in Atlantic salmon (Salmo salar)
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...
Published in: | Evolutionary Ecology |
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Uppsala universitet, Zooekologi
2014
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-238419 https://doi.org/10.1007/s10682-014-9715-x |
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ftuppsalauniv:oai:DiVA.org:uu-238419 2023-05-15T15:31:02+02:00 The mating brain : early maturing sneaker males maintain investment into the brain also under fast body growth in Atlantic salmon (Salmo salar) Kotrschal, Alexander Trombley, Susanne Rogell, Björn Brännström, Ioana Onut Foconi, Eric Schmitz, Monika Kolm, Niclas 2014 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-238419 https://doi.org/10.1007/s10682-014-9715-x eng eng Uppsala universitet, Zooekologi Uppsala universitet, Jämförande fysiologi Uppsala universitet, Evolutionsbiologi Evolutionary Ecology, 0269-7653, 2014, 28:6, s. 1043-1055 orcid:0000-0002-5553-2691 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-238419 doi:10.1007/s10682-014-9715-x ISI:000344075200005 info:eu-repo/semantics/openAccess Brain Atlantic salmon Mating strategy Sneaker Salmo salar Brain development Trade-off Genetics Genetik Ecology Ekologi Article in journal info:eu-repo/semantics/article text 2014 ftuppsalauniv https://doi.org/10.1007/s10682-014-9715-x 2023-02-23T21:57:57Z 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. Article in Journal/Newspaper Atlantic salmon Salmo salar Uppsala University: Publications (DiVA) Evolutionary Ecology 28 6 1043 1055 |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Brain Atlantic salmon Mating strategy Sneaker Salmo salar Brain development Trade-off Genetics Genetik Ecology Ekologi |
spellingShingle |
Brain Atlantic salmon Mating strategy Sneaker Salmo salar Brain development Trade-off Genetics Genetik Ecology Ekologi Kotrschal, Alexander Trombley, Susanne Rogell, Björn Brännström, Ioana Onut Foconi, Eric Schmitz, Monika Kolm, Niclas The mating brain : early maturing sneaker males maintain investment into the brain also under fast body growth in Atlantic salmon (Salmo salar) |
topic_facet |
Brain Atlantic salmon Mating strategy Sneaker Salmo salar Brain development Trade-off Genetics Genetik Ecology Ekologi |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Kotrschal, Alexander Trombley, Susanne Rogell, Björn Brännström, Ioana Onut Foconi, Eric Schmitz, Monika Kolm, Niclas |
author_facet |
Kotrschal, Alexander Trombley, Susanne Rogell, Björn Brännström, Ioana Onut Foconi, Eric Schmitz, Monika Kolm, Niclas |
author_sort |
Kotrschal, Alexander |
title |
The mating brain : early maturing sneaker males maintain investment into the brain also under fast body growth in Atlantic salmon (Salmo salar) |
title_short |
The mating brain : early maturing sneaker males maintain investment into the brain also under fast body growth in Atlantic salmon (Salmo salar) |
title_full |
The mating brain : early maturing sneaker males maintain investment into the brain also under fast body growth in Atlantic salmon (Salmo salar) |
title_fullStr |
The mating brain : early maturing sneaker males maintain investment into the brain also under fast body growth in Atlantic salmon (Salmo salar) |
title_full_unstemmed |
The mating brain : early maturing sneaker males maintain investment into the brain also under fast body growth in Atlantic salmon (Salmo salar) |
title_sort |
mating brain : early maturing sneaker males maintain investment into the brain also under fast body growth in atlantic salmon (salmo salar) |
publisher |
Uppsala universitet, Zooekologi |
publishDate |
2014 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-238419 https://doi.org/10.1007/s10682-014-9715-x |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
Evolutionary Ecology, 0269-7653, 2014, 28:6, s. 1043-1055 orcid:0000-0002-5553-2691 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-238419 doi:10.1007/s10682-014-9715-x ISI:000344075200005 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s10682-014-9715-x |
container_title |
Evolutionary Ecology |
container_volume |
28 |
container_issue |
6 |
container_start_page |
1043 |
op_container_end_page |
1055 |
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1766361525885337600 |