Does egg carotenoid improve larval quality in Arctic charr (Salvelinus alpinus)?
Abstract Females in mutually ornamented species are often less conspicuously ornamented than their male conspecifics. It has been hypothesized that offspring quality may decrease if females invest more resources into ornaments at the expense of resources in eggs. An experiment was carried out to tes...
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ftdoajarticles:oai:doaj.org/article:25f5884ac65a4fd2b5a4a93e57561ceb 2023-05-15T14:29:59+02:00 Does egg carotenoid improve larval quality in Arctic charr (Salvelinus alpinus)? Torvald Blikra Egeland Einar Skarstad Egeland Jarle Tryti Nordeide 2022-04-01T00:00:00Z https://doi.org/10.1002/ece3.8812 https://doaj.org/article/25f5884ac65a4fd2b5a4a93e57561ceb EN eng Wiley https://doi.org/10.1002/ece3.8812 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.8812 https://doaj.org/article/25f5884ac65a4fd2b5a4a93e57561ceb Ecology and Evolution, Vol 12, Iss 4, Pp n/a-n/a (2022) Arctic charr carotenoid female ornaments ornaments Salvelinus alpinus signal Ecology QH540-549.5 article 2022 ftdoajarticles https://doi.org/10.1002/ece3.8812 2023-02-19T01:45:47Z Abstract Females in mutually ornamented species are often less conspicuously ornamented than their male conspecifics. It has been hypothesized that offspring quality may decrease if females invest more resources into ornaments at the expense of resources in eggs. An experiment was carried out to test whether natural variation in carotenoid in the eggs from a wild population of Arctic charr (Salvelinus alpinus) was associated with survival and growth of their offspring until hatching. Wild Arctic charr were caught at a spawning ground during the spawning period. Eggs from two different females, one female with yellowish carotenoid‐rich eggs and one with paler eggs, were fertilized by sperm from the same male. This was repeated until gametes were collected from 42 females and 21 males, giving a total of 21 groups. After fertilization, the zygotes from each of the two females were reared in four replicated groups. These 168 groups were reared separately until hatching when the surviving larvae were counted and their body length measured. For the two response variables survival and body length at hatching, no effect was demonstrated of any of the predictors (i) amount of carotenoid in the unfertilized eggs, (ii) the mothers' body condition, or (iii) ornament intensity of their red carotenoid‐based abdominal ornament. Thus, this study gives no support for the hypothesis that females investing less carotenoid into their eggs suffer from decreased offspring quality until hatching. This lack of association between female ornament intensity and their fitness is not as expected if female ornaments evolved due to direct sexual selection from males on the more ornamented females (“direct selection hypothesis”). Article in Journal/Newspaper Arctic charr Arctic Salvelinus alpinus Directory of Open Access Journals: DOAJ Articles Arctic Ecology and Evolution 12 4 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic charr carotenoid female ornaments ornaments Salvelinus alpinus signal Ecology QH540-549.5 |
spellingShingle |
Arctic charr carotenoid female ornaments ornaments Salvelinus alpinus signal Ecology QH540-549.5 Torvald Blikra Egeland Einar Skarstad Egeland Jarle Tryti Nordeide Does egg carotenoid improve larval quality in Arctic charr (Salvelinus alpinus)? |
topic_facet |
Arctic charr carotenoid female ornaments ornaments Salvelinus alpinus signal Ecology QH540-549.5 |
description |
Abstract Females in mutually ornamented species are often less conspicuously ornamented than their male conspecifics. It has been hypothesized that offspring quality may decrease if females invest more resources into ornaments at the expense of resources in eggs. An experiment was carried out to test whether natural variation in carotenoid in the eggs from a wild population of Arctic charr (Salvelinus alpinus) was associated with survival and growth of their offspring until hatching. Wild Arctic charr were caught at a spawning ground during the spawning period. Eggs from two different females, one female with yellowish carotenoid‐rich eggs and one with paler eggs, were fertilized by sperm from the same male. This was repeated until gametes were collected from 42 females and 21 males, giving a total of 21 groups. After fertilization, the zygotes from each of the two females were reared in four replicated groups. These 168 groups were reared separately until hatching when the surviving larvae were counted and their body length measured. For the two response variables survival and body length at hatching, no effect was demonstrated of any of the predictors (i) amount of carotenoid in the unfertilized eggs, (ii) the mothers' body condition, or (iii) ornament intensity of their red carotenoid‐based abdominal ornament. Thus, this study gives no support for the hypothesis that females investing less carotenoid into their eggs suffer from decreased offspring quality until hatching. This lack of association between female ornament intensity and their fitness is not as expected if female ornaments evolved due to direct sexual selection from males on the more ornamented females (“direct selection hypothesis”). |
format |
Article in Journal/Newspaper |
author |
Torvald Blikra Egeland Einar Skarstad Egeland Jarle Tryti Nordeide |
author_facet |
Torvald Blikra Egeland Einar Skarstad Egeland Jarle Tryti Nordeide |
author_sort |
Torvald Blikra Egeland |
title |
Does egg carotenoid improve larval quality in Arctic charr (Salvelinus alpinus)? |
title_short |
Does egg carotenoid improve larval quality in Arctic charr (Salvelinus alpinus)? |
title_full |
Does egg carotenoid improve larval quality in Arctic charr (Salvelinus alpinus)? |
title_fullStr |
Does egg carotenoid improve larval quality in Arctic charr (Salvelinus alpinus)? |
title_full_unstemmed |
Does egg carotenoid improve larval quality in Arctic charr (Salvelinus alpinus)? |
title_sort |
does egg carotenoid improve larval quality in arctic charr (salvelinus alpinus)? |
publisher |
Wiley |
publishDate |
2022 |
url |
https://doi.org/10.1002/ece3.8812 https://doaj.org/article/25f5884ac65a4fd2b5a4a93e57561ceb |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Salvelinus alpinus |
op_source |
Ecology and Evolution, Vol 12, Iss 4, Pp n/a-n/a (2022) |
op_relation |
https://doi.org/10.1002/ece3.8812 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.8812 https://doaj.org/article/25f5884ac65a4fd2b5a4a93e57561ceb |
op_doi |
https://doi.org/10.1002/ece3.8812 |
container_title |
Ecology and Evolution |
container_volume |
12 |
container_issue |
4 |
_version_ |
1766303930803814400 |