495 results — topic: Freshwater Ecology
Rainbow trout diet and invertebrate drift data from 2012-2015 for the Colorado River, Grand Canyon, Arizona
These data were compiled to explore the foraging ecology of Rainbow Trout (Oncorhynchus mykiss) in the Colorado River, Grand Canyon, Arizona. These data represent samples characterizing the availability of drifting invertebrate prey (hereafter, drift) and use of these invertebrate prey by rainbow tr
Fish Passage Restoration Stream Habitat Restoration Guidelines: Final Draft
This technique focuses on restoring safe upstream and downstream fish passage to streams and stream reaches that have become isolated by culverts, dams, and other artificial obstructions. It also addresses ways to prevent or minimize harm to fish at stream diversions and water intakes. For migratory
A study of nutrient limitation in a kettle hole pond, conducted by examining the effects of nitrogen and phosphorus on phytoplankton growth
Temperature and light intensity effects on the feeding rates of fairy shrimp (<i>Branchinecta</i>)
Analysis of primary productivity and biomass of phytoplanktonic, benthic and periphytic algae in kettle pond #K2 of of Gothic, Colorado
LC50 screening and predictive tests on rainbow trout
Two new trichomycete species from Zapada spp. (Stonefly) nymphs with an unusual distribution
Succession, scale and hypothesis-testing in streams: a reply to Fisher
Mayfly cerci as defense against stonefly predation: deflection and detection
In situ behavioral experiments were conducted in flow-through observation boxes in a Colorado and a New York stream to compare and contrast the cercal responses of Ephemerellidae and Baetidae mayflies to predaceous stoneflies. Ephemerella infrequens (Colorado) exhibited primarily a posture when touc
Flight direction in some Rocky Mountain mayflies, with observations of parasitism
Prey size selection by carnivorous stoneflies
Prey preference of stoneflies: sedentary vs. mobile prey
We investigated the effects of prey size and type (sedentary vs mobile) on prey preference in a predaceous stonefly, based on choice experiments and observations of the predator-prey interaction. We presented three size classes of black fly larvae (Prosimulium) to various sizes of the perlid stonefl
Macroinvertebrate drift in a Rocky Mountain stream
Acute toxicity tests: range-finding and predictive tests of the effects of copper on immature rainbow trout
Studying the spatial dispersion of populations of high elevation benthic stream invertebrates
Functional feeding group composition of invertebrate fauna: comparing a pond with four streams
Behavior of <i>Ambystoma tigrinum</i> larvae under field and laboratory conditions
Colonization of natural substrates by stream benthos
Natural substrates in mesh cages in a Tompkins County, New York, woodland stream were colonized by benthic invertebrates for periods of 3, 6, 9, 12, 18, 24, 30, and 42 d during autumn 1980. An experiment was designed for the purpose of distinguishing seasonal phenology from site-specific temporal (n