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A three-year field study examining habitat distribution of juvenile and adult Arctic grayling (Thymallus arcticus) in 23 streams across the Brooks Range, Alaska, comparing occupied habitats with available habitat to determine habitat preferences and selection patterns.
This research paper presents relative suitability-of-use functions for juvenile and adult Arctic grayling (Thymallus arcticus) in 23 streams across northern Alaska, using depth, velocity, and substrate type as key habitat parameters. The study demonstrates that juvenile grayling prefer depths of 0.65 m with zero velocity and fine substrates, while adults prefer greater depths of 0.80 m, with both groups showing clear correlations between habitat suitability function values and fish occupancy and density.
A comprehensive synoptic review of cadmium hazards to fish, wildlife, and invertebrates documenting toxicity thresholds, bioaccumulation patterns, sublethal effects, and recommendations for environmental protection standards across freshwater and marine ecosystems.
Two experimental studies comparing the susceptibility of Atlantic salmon smolts and yearling rainbow trout to zinc sulphate and ammonium chloride across varying salinity levels from fresh water to full-strength sea water. Results show resistance to both poisons increases with salinity up to 30–40% sea water, with salmon smolts consistently more susceptible than trout, and tolerance differences attributable to gill permeability and osmotic effects.