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, respectivel...
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Multidisciplinary Digital Publishing Institute
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Online Access: | https://doi.org/10.3390/jmse10020167 |
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ftmdpi:oai:mdpi.com:/2077-1312/10/2/167/ 2023-08-20T04:03:16+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 agris 2022-01-27 application/pdf https://doi.org/10.3390/jmse10020167 EN eng Multidisciplinary Digital Publishing Institute Marine Biology https://dx.doi.org/10.3390/jmse10020167 https://creativecommons.org/licenses/by/4.0/ Journal of Marine Science and Engineering; Volume 10; Issue 2; Pages: 167 teleost fish thermal plasticity growth puberty sexual size dimorphism Text 2022 ftmdpi https://doi.org/10.3390/jmse10020167 2023-08-01T03:58:53Z 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. Text Arctic charr Arctic Salvelinus alpinus MDPI Open Access Publishing Arctic Journal of Marine Science and Engineering 10 2 167 |
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MDPI Open Access Publishing |
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English |
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teleost fish thermal plasticity growth puberty sexual size dimorphism |
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teleost fish thermal plasticity growth puberty sexual size dimorphism 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 |
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 |
Text |
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 |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/jmse10020167 |
op_coverage |
agris |
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; Volume 10; Issue 2; Pages: 167 |
op_relation |
Marine Biology https://dx.doi.org/10.3390/jmse10020167 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
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 |
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1774713657882574848 |