Climate warming accelerates somatic growth of an Arctic fish species in high-latitude lakes

被引:5
作者
Kotowych, Nicholas [1 ]
Smalas, Aslak [1 ]
Amundsen, Per-Arne [1 ]
Primicerio, Raul [1 ]
机构
[1] UiT Arct Univ Norway, Fac Biosciences, Fisheries & Econ, Tromso, Norway
基金
欧盟地平线“2020”;
关键词
TROUT SALMO-TRUTTA; CHAR SALVELINUS-ALPINUS; ATLANTIC SALMON; FRESH-WATER; HABITAT USE; TEMPERATURE REQUIREMENTS; SIZE; AGE; COMPETITION; SALAR;
D O I
10.1038/s41598-023-43654-1
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
High-latitude aquatic ecosystems are responding to rapid climate warming. A longer ice-free season with higher water temperatures may accelerate somatic growth in lake ectotherms, leading to widespread ecological implications. In fish, rising temperatures are expected to boost rates of food intake and conversion, and predictions based on empirical relationships between temperature and growth suggest a substantial increase in fish growth rates during the last decades. Fish abundance negatively affects growth by limiting food availability. This field study addresses the effects of climate warming on growth of a subarctic population of Arctic charr (Salvelinus alpinus (L.) over nearly 40 years. Juvenile growth of 680 individuals of Arctic charr, was reconstructed by sclerochronological analysis using sagittal otoliths sampled annually from the early 1980s to 2016. Statistical modelling revealed a positive effect of water temperature, and a negative effect of abundance on somatic growth in juvenile individuals. Temperature dependence in growth was significant for average and fast-growing individuals across all investigated age classes. These findings suggest that, as temperatures rise, somatic growth of Arctic charr will increase in high latitude lakes. Climate warming will thus influence cold water fish life history and size-structured interactions, with important consequences for their populations and ecosystems.
引用
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页数:11
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