| effects of metal mining effluent on atlantic salmon (salmo salar) and slimy sculpin (cottus cognatus): using artificial streams to assess existing effects and predict future consequences. | in the summer of 2000, the effects of metal mine discharge on fish growth and exercise performance were assessed at a zn-pb-cu mine in new brunswick, canada. juvenile atlantic salmon (salmo salar) were exposed to 0%, 20%, and 80% treated metal mine effluent in a mobile, fish-only artificial stream system. fish were fed commercial salmon pellets throughout the study. young-of-the-year slimy sculpins (cottus cognatus) were exposed to the same treatments in a multitrophic level, modular artificial ... | 2004 | 15862841 |
| impacts of nonpoint inputs from potato farming on populations of slimy sculpin (cottus cognatus). | the potential influence of agricultural activity, particularly potato cultivation, on slimy sculpin populations (cottus cognatus) was examined at 19 rivers of new brunswick, canada. comparisons with forested streams resulted in differences in fish density, size, and reproductive performance. young-of-the-year (yoy) sculpin were present only at two of 11 agricultural sites, though they were present at all nine forested sites. sediment deposition was greatest at agricultural sites, with increased ... | 2005 | 16193758 |
| stream flow, salmon and beaver dams: roles in the structuring of stream fish communities within an anadromous salmon dominated stream. | the current paradigm of fish community distribution is one of a downstream increase in species richness by addition, but this concept is based on a small number of streams from the mid-west and southern united states, which are dominated by cyprinids. further, the measure of species richness traditionally used, without including evenness, may not be providing an accurate reflection of the fish community. we hypothesize that in streams dominated by anadromous salmonids, fish community diversity w ... | 2007 | 17922703 |
| comparing responses in the performance of sentinel populations of stoneflies (plecoptera) and slimy sculpin (cottus cognatus) exposed to enriching effluents. | programs in canada that assess the effects of wastewater discharges on organisms, such as environmental effects monitoring (eem), primarily focus on fish populations and benthic invertebrate communities. although these methods are widely accepted, there are many situations where fish monitoring is difficult and benthic community data is difficult to interpret; in these instances alternative approaches should be used. there are, however, few alternative methods available. one potential alternativ ... | 2011 | 21816476 |
| using stable isotope analysis with telemetry or mark-recapture data to identify fish movement and foraging. | information about animal movements has often been inferred from stable isotope analysis (sia), but is dependent on animals assimilating site-specific isotopic signatures via diet. this potential weakness in ecological interpretation can be overcome by using other investigative tools that provide precise information about individual movement patterns. in this paper, we demonstrate the value of combining sia with telemetry or mark-recapture data from trapping, electrofishing and remote detection o ... | 2005 | 15959824 |