TROUT SALMO-TRUTTA
; SALVELINUS-ALPINUS L.
; FRESH-WATER FISHES
; CLIMATE-CHANGE
; BROWN TROUT
; NORTHWEST-TERRITORIES
; LATITUDINAL VARIATION
; GROWTH-PATTERNS
; LIFE-HISTORY
; TEMPERATURE
WOS学科分类:
Marine & Freshwater Biology
WOS研究方向:
Marine & Freshwater Biology
英文摘要:
Insights from long-term subsistence fisheries data can improve our understanding of the population-specific responses of Arctic charr, Salvelinus alpinus, to environmental conditions. In this study, associations were found between temporal environmental variation and Arctic charr length- and weight-based growth using data from fish captured in the Hornaday River fishery. Overall, spring precipitation and summer air temperature appear to be the most important environmental influences on Arctic charr probably because of their respective impacts on the opportunities for acquiring surplus energy for growth. A pattern of decreasing age-related importance of temperature and increasing age-related importance of precipitation suggested that the coupling between growth and environmental effects varied by life-period. The changing prominence of each variable seems to result from the shift in apportioning energy for increases in length to increases in weight, likely as a result of the onset of maturation. The linkage of population characteristics to environmental conditions provides a baseline reference against which future data may be compared to determine the significance of any observed changes in population characteristics as a result of continuing ecological change in the north.
1.Univ Waterloo, Dept Biol, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada 2.Univ British Columbia, Dept Zool, 2212 Main Mall, Vancouver, BC V6T 1Z4, Canada 3.Fisheries & Oceans Canada, 501 Univ Crescent, Winnipeg, MB R3T 2N6, Canada 4.Univ Guelph, Dept Integrat Biol, 50 Stone Rd East, Guelph, ON N1G 2W1, Canada 5.Fisheries & Oceans Canada, Suite 301,5204-50th Ave, Yellowknife, NT X1A 1E2, Canada
Recommended Citation:
Chavarie, L.,Reist, J. D.,Guzzo, M. M.,et al. Influences of environmental variation on anadromous Arctic charr from the Hornaday River, NWT[J]. HYDROBIOLOGIA,2019-01-01,840(1):157-172