Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr
The effects of early thermal environment on growth, age at maturity, and sexual size dimorphism in Arctic charr ( Salvelinus alpinus ) are investigated. This study is a 654-day long rearing trial split into two sequential experimental phases termed EP1 and EP2 and lasting 315 and 339 days, respectiv...
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MDPI AG
2022
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ftdoajarticles:oai:doaj.org/article:0d227db4222b43dbab86400e70899438 2023-05-15T14:30:06+02:00 Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr Tómas Árnason Heiðdís Smáradóttir Helgi Thorarensen Agnar Steinarsson 2022-01-01T00:00:00Z https://doi.org/10.3390/jmse10020167 https://doaj.org/article/0d227db4222b43dbab86400e70899438 EN eng MDPI AG https://www.mdpi.com/2077-1312/10/2/167 https://doaj.org/toc/2077-1312 doi:10.3390/jmse10020167 2077-1312 https://doaj.org/article/0d227db4222b43dbab86400e70899438 Journal of Marine Science and Engineering, Vol 10, Iss 167, p 167 (2022) teleost fish thermal plasticity growth puberty sexual size dimorphism Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 article 2022 ftdoajarticles https://doi.org/10.3390/jmse10020167 2022-12-31T09:44:06Z The effects of early thermal environment on growth, age at maturity, and sexual size dimorphism in Arctic charr ( Salvelinus alpinus ) are investigated. This study is a 654-day long rearing trial split into two sequential experimental phases termed EP1 and EP2 and lasting 315 and 339 days, respectively. EP1 started at the end of the yolk sac stage when the experimental fish were divided into three groups and reared at different target temperatures (7, 10 and 12 °C). During EP2, all groups were reared at the same temperature (7–8 °C) until harvest (~1300 g). Growth rates increased with temperature from 7 to 12 °C, and at the end of EP1 the 12C group had 49.0% and 19.2% higher mean weight than groups 7C and 10C, respectively. Elevated early rearing temperatures were, however, found to cause precocious sexual maturation and reduce the long-term growth performance. At the end of EP2, the 7C group had 3.6% and 14.1% higher mean weight than 10C and 12C, respectively. Elevated early rearing temperatures had a much stronger effect on the maturity incidence of females, and while male-biased sexual size dimorphism (SSD) was found in all groups, the magnitude of SSD was positively associated with temperature. Article in Journal/Newspaper Arctic charr Arctic Salvelinus alpinus Directory of Open Access Journals: DOAJ Articles Arctic Journal of Marine Science and Engineering 10 2 167 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
teleost fish thermal plasticity growth puberty sexual size dimorphism Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
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teleost fish thermal plasticity growth puberty sexual size dimorphism Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Tómas Árnason Heiðdís Smáradóttir Helgi Thorarensen Agnar Steinarsson Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr |
topic_facet |
teleost fish thermal plasticity growth puberty sexual size dimorphism Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
description |
The effects of early thermal environment on growth, age at maturity, and sexual size dimorphism in Arctic charr ( Salvelinus alpinus ) are investigated. This study is a 654-day long rearing trial split into two sequential experimental phases termed EP1 and EP2 and lasting 315 and 339 days, respectively. EP1 started at the end of the yolk sac stage when the experimental fish were divided into three groups and reared at different target temperatures (7, 10 and 12 °C). During EP2, all groups were reared at the same temperature (7–8 °C) until harvest (~1300 g). Growth rates increased with temperature from 7 to 12 °C, and at the end of EP1 the 12C group had 49.0% and 19.2% higher mean weight than groups 7C and 10C, respectively. Elevated early rearing temperatures were, however, found to cause precocious sexual maturation and reduce the long-term growth performance. At the end of EP2, the 7C group had 3.6% and 14.1% higher mean weight than 10C and 12C, respectively. Elevated early rearing temperatures had a much stronger effect on the maturity incidence of females, and while male-biased sexual size dimorphism (SSD) was found in all groups, the magnitude of SSD was positively associated with temperature. |
format |
Article in Journal/Newspaper |
author |
Tómas Árnason Heiðdís Smáradóttir Helgi Thorarensen Agnar Steinarsson |
author_facet |
Tómas Árnason Heiðdís Smáradóttir Helgi Thorarensen Agnar Steinarsson |
author_sort |
Tómas Árnason |
title |
Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr |
title_short |
Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr |
title_full |
Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr |
title_fullStr |
Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr |
title_full_unstemmed |
Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr |
title_sort |
effects of early thermal environment on growth, age at maturity, and sexual size dimorphism in arctic charr |
publisher |
MDPI AG |
publishDate |
2022 |
url |
https://doi.org/10.3390/jmse10020167 https://doaj.org/article/0d227db4222b43dbab86400e70899438 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Salvelinus alpinus |
op_source |
Journal of Marine Science and Engineering, Vol 10, Iss 167, p 167 (2022) |
op_relation |
https://www.mdpi.com/2077-1312/10/2/167 https://doaj.org/toc/2077-1312 doi:10.3390/jmse10020167 2077-1312 https://doaj.org/article/0d227db4222b43dbab86400e70899438 |
op_doi |
https://doi.org/10.3390/jmse10020167 |
container_title |
Journal of Marine Science and Engineering |
container_volume |
10 |
container_issue |
2 |
container_start_page |
167 |
_version_ |
1766304017488543744 |