Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 49 for “"fish habitat"”.
-
Fish-Habitat Associations in Small Backwaters of the Upper Missouri River, North Dakota
I evaluated habitat characteristics and fish assemblages associated with small backwaters of the Upper Missouri River, North Dakota. Backwaters sampled ranged in size from 0.002 to 0.44 ha with a mean area of 0.08 ha and were located relatively close to the main channel of the Missouri River (mean …
-
An Individual-Based Model of Fish Habitat Selection for Network-Scale Watershed Assessment
The results of this research show that process-based interdisciplinary models can be developed for understanding large-scale ecological dynamics in river networks. The explicit inclusion of species' biological functions allows the model to explain the arrangement and response of stream communities. …
-
Evaluation and Use of Stream Temperature Prediction Models for Instream Flow and Fish Habitat Management
The SNTEMP (U.S. Fish and Wildlife Service), QUAL2E (U.S. Environmental Protection Agency), and RQUAL (Tennessee Valley Authority) stream temperature prediction models were evaluated. All models had high predictive ability with the majority of predictions, >80% for Back Creek (Roanoke County, VA) …
-
Himalayan Blackberry (Rubus armeniacus) Effects on Fish Habitat: Impacts from Riparian Zones Inundated with Himalayan Blackberry
This study compared the quality of fish habitat in small lotic reaches (channel width 1.5-5 m) having riparian zones inundated with invasive Himalayan blackberry (Rubus armeniacus) plants (test conditions) (3 sites) and reaches with a riparian zone consisting primarily of native vegetation …
-
Geology, surface hydrology, and fish habitat relationships in the upper Shavers Fork drainage basin, West Virginia
Shavers Fork is the mainstem stream of a unique upper elevation watershed located in the Appalachian Plateaus province of West Virginia. Surficial "facies" mapping of in-stream and floodplain-adjacent landforms helped to classify small-scale flow patterns into heterogeneous and homogeneous channel …
-
A GIS evaluation of land use dynamics and fish habitat in the salmon river watershed - Langley, B.C.
… in the Fraser River Basin, it is expected that fish habitat degradation will become more widespread bringing into question the sustainability of the fisheries resource. This thesis examines the dynamics of land use and fish habitat in the Salmon River watershed located in the Lower Fraser River …
-
Local and Systemic Controls on Fish and Fish Habitat in South Dakota Rivers and Streams: Implications for Management
… settings in controlling physical habitat and fish communities were better defined. My research approach was based on a premise that assessments of the health of rivers and streams in prairie environments would benefit from studies that 1) examine the moderating effects of systemic …
-
Three dimensional water quality modeling in a shallow lake with complex morphometry; implications for coolwater fish habitat under changing climate
… conditions on key water quality parameters and fish habitat in 3 bays of Lake Minnetonka. The research was conducted by simulating the model and analyzing the model output results under three climate scenarios of historical normal (HN), future (FU), and future extreme (FE). Water temperature (T) …
-
GEOSPATIAL MODELLING OF PRAIRIE RIVERS: LINKING PHYSICAL INDICATORS OF FISH HABITAT TO LARGE SCALE GEOMORPHIC PATTERNS IN RIVER SYSTEMS USING GEOMORPHIC RESPONSE UNITS (GRU)
… defining biological, ecological, and physical habitat characteristics of rivers, a readily applied classification tool that links such characteristics has been lacking. The Geomorphic Response Unit (GRU) method provides a novel approach to identifying large scale patterns in geomorphic …
-
Habitat driven responses of reef fish: temporal change, niche partitioning and selection
Shallow water tropical and temperate marine habitats are changing dramatically in response to many stressor-driven effects. The change in turn threatens the associated fish communities relying on their maintenance for habitat provision. At present, a much better understanding of the interaction …
-
Spatial models of Hawaiian streams and Hawaiian stream fish habital
… based models of Hawaiian streams and stream fish habitats were developed to aid in the conservation of native fishes. The spatial models focused on the quantification of habitat for native fishes at three levels within a spatial hierarchy. First, at the reach level, the models classified the …
-
Short-term response of physical habitat and fish to the addition of large woody debris in two Appalachian Mountain streams
… Barbours Creek in southwest Virginia to inlprove fish habitat. The purposes of this study were to monitor stream channel response to the addition of LWD at a stream reach scale and at a local scale around individual logs, to evaluate changes in fish population parameters, and to observe …
-
Stream Habitat Characterized by Stage -Specific Flows and Three-Dimensional Geomorphological Complexity: Development of Ecological Criteria for Stream Restoration Design
… Illinois, a new classification scheme for mesohabitat units was developed based on three-dimensional geomorphological complexity, and associated flow structures at low- and high-flow stages. In this two-tier classification scheme, the term fluvial habitat unit was used because fluvial refers to …
-
Habitat tools for assessing instream-flow needs for fishes in the upper Roanoke River, Virginia
… analyses, with emphasis on protecting fish assemblages in speciose, warmer-water streams. This included habitat and fish data sets for the upper Roanoke River (URR) in southwestern Virginia, collected during the warmer, low- f low seasons of 1989-1991. Physical data were collected in …
-
Behavior and habitat selection of largemouth bass in response to dynamic environmental variables with a focus on dissolved oxygen
… thermocline, resulting in the loss of suitable fish habitat. Additionally, high surface temperatures can also contribute to the loss of preferred habitat. Understanding how fish interact with and respond to their environment is a critical part of fisheries research and management. My research …
-
The influence of hydraulics, hydrology and temperature on the distribution, habitat use and recruitment of threatened cyprinids in a Western Cape river, South Africa
… explore the relationships between river flow and fish ecology in the context of the riverscape model of river ecosystems by examining the seasonal distribution of two endangered fish species, i.e. the Clanwilliam yellowfish and Clanwilliam sawfin, in relation to their physical (structural) and …
-
Instream flow methodologies: an evaluation of the Tennant method for higher gradient streams in the national forest system lands in the western U.S.
… for determining instream flow requirements for fish, known as the 'Montana method', or more commonly the Tennant method. The method uses a percentage of average annual flow (AAF) to determine fish habitat quality. From 58 cross sections from 11 streams in Montana, Nebraska, and Wyoming, Tennant …
-
Hydropeaking in Alpine rivers: an ecosystem services approach
… have a direct influence on biodiversity, natural habitat and on the supply of river ecosystem services. The release of water from storage hydropower plants generates rapid flow and stage fluctuations (hydropeaking) in the receiving water bodies at a variety of sub-daily time-scales. In this …
-
Aeration of Stockade Lake, South Dakota
… raised sufficiently to increase the volume of fish habitat. The effects of aeration described in this paper show that individual lake characteristics and weather may determine the extent of limnological changes.
-
Habitat Suitability and Availability for Rainbow Trout (Oncorhynchus mykiss) in the Canyon Reservoir Tailrace and Evaluation of Side Scan Sonar for Habitat Mapping in a Semi-Wadable River
… the southeastern United States to mitigate fish habitat and assemblage alterations caused by large impoundments. Hypolimnetic discharges from Canyon Reservoir have created conditions suitable for a coldwater tailrace fishery and trout have been stocked there since 1966. Changes in habitat …
Page 1 of 3