Arctic charr exploit restricted urbanized coastal areas during marine migration: Could they be in harm’s way?
| Autor: | Guttorm Christensen, Carolyn Rosten, Audun H. Rikardsen, Jenny L. A. Jensen, K. H. Hawley |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
education.field_of_study Fish migration Ecology Range (biology) 010604 marine biology & hydrobiology Population Marine habitats Climate change Aquatic Science 010603 evolutionary biology 01 natural sciences Current (stream) Fishery Arctic Environmental science education Arctic ecology geographic locations |
| Zdroj: | Hydrobiologia. 783:335-345 |
| ISSN: | 1573-5117 0018-8158 |
| DOI: | 10.1007/s10750-016-2787-6 |
| Popis: | Human and industrial activities in Arctic areas are increasing, as are global water temperatures. Combined, these factors can result in altered conditions for species living in these, until recently, pristine areas. Of the anadromous salmonids, Arctic charr may be particularly vulnerable to these changes, as this species is adapted to cold waters and exploits restricted areas at sea. In order to test to what extent Arctic charr utilized coastal areas with anthropogenic interference versus more pristine waters, the marine area use of a population in northern Norway was documented over three consecutive years by use of acoustic telemetry. Their depth utilization, temperature preference and survival was also recorded. The tagged fish spent a minimum of half of their marine residency time within 5 km of the river outlet proximate to urbanized coastal areas. The fish also resided within a narrow temperature and depth range and spent a very limited period at sea. The marine habitat available to Arctic charr should be carefully considered in coastal development and management plans, as human activities and coastal water temperatures increase in the Arctic regions. The current study illustrates the importance of species and population-specific knowledge during development of management strategies for anadromous salmonids. |
| Databáze: | OpenAIRE |
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