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 61 for “"Anadromous"”.
-
Impacts to Anadromous Fish through Groundwater Extraction
… climate. The state also hosts populations of anadromous fish that are otherwise found exclusively in the wetter Pacific northwest. Groundwater has historically helped maintain baseflow in the summer and fall low-flow periods and acted as a natural buffer against the regular droughts that occur …
-
Do freshwater growth opportunities and migration barriers limit recovery of imperiled anadromous Oncorhynchus mykiss populations?
… is known about how resident O. mykiss above anadromous barriers interact with steelhead downstream. This study evaluated the dispersal and gene flow of above-barrier Oncorhynchus mykiss in the Duckabush and Hamma Hamma Rivers, Washington into below-barrier reaches that were accessible to …
-
Food–web implications of reintroducing anadromous salmonids in reservoirs on the North Fork Lewis River, Washington
… using active transport (trap–and–haul) of anadromous salmonids around impassable high–head dams are being proposed with increasing frequency in the Pacific Northwest. Such reintroductions have already begun or are proposed above three dams on the North Fork Lewis River in Washington State. …
-
Genetic differentiation of a sympatric lake-resident/anadromous species pair of threespine stickleback in Mud Lake, Alaska
… the first genetic analysis of a lake-resident/anadromous species pair of threespine stickleback. This analysis is preformed on a lake-resident/anadromous pair found in Mud Lake, a freshwater lake in the Jim Creek drainage of Alaska. Anadromous and resident freshwater stickleback in Mud Lake …
-
Movement and survival of chinook salmon fry stocked in a stream with natural barriers to anadromous fish migration
… salmonid rearing habitat, but was devoid of anadromous fish upstream of the barrier falls near tidewater. Approximately 50,000 and 260,000 chinook fry were stocked into Indian River in 1986 and 1988, respectively. The stream was divided into reaches which were stocked with equal numbers of …
-
Predicting how the juvenile life-stages of anadromous Atlantic salmon Salmo salar influence their migration phenology and marine survival.
… phenology, is crucially important. Salmon are an anadromous species that undertake a marine migration from freshwater to oceanic feeding grounds, returning as mature adults to their natal river to reproduce. Undertaking lengthy migrations represents an evolutionary trade-off, where the risks …
-
Spatial and Temporal Patterns of Anadromous Fish Passage at Boshers Dam Vertical Slot Fishway on the James River, Richmond, Virginia
… connectivity to 543.3 km of spawning habitat for anadromous fish. The fishway also allowed local movement of resident species. Video observation from 2001-2005 was used to evaluate environmental predictors of American shad (Alosa sapidissima) and sea lamprey (Petromyzon marinus) passage. The …
-
Movement ecology of two threatened anadromous species, twaite shad Alosa fallax and sea lamprey Petromyzon marinus, revealed by acoustic telemetry.
… declines and extirpations of once-abundant anadromous species. Understanding the movement ecology of anadromous species during all phases of their lifecycle is vital to understand, predict and mitigate the impacts of fragmentation. This is especially crucial for groups such as the Alosinae …
-
Lessons to learn from all out invasion: life history of brown trout (Salmo trutta) in a Patagonian River
… supporting resident fish with those supporting anadromous fish. Additionally, brown trout and native fish distribution and abundance was described using a combination of local knowledge, angling, electrofishing, and netting. Results indicate that brown trout developed an anadromous life history …
-
Lessons to learn from all out invasion: life history of brown trout (Salmo trutta) in a Patagonian River
… supporting resident fish with those supporting anadromous fish. Additionally, brown trout and native fish distribution and abundance was described using a combination of local knowledge, angling, electrofishing, and netting. Results indicate that brown trout developed an anadromous life history …
-
The role of intrinsic and extrinsic factors in shaping alternative migratory tactics and metabolic phenotypes in brown trout
… more frequent in offspring from the naturally anadromous population, the expression of anadromous phenotypes in offspring from a non-anadromous population indicated that migratory tactics might emerge in response to unfavourable environmental conditions causing energetic limitation. In Chapter …
-
Effects of size, age and photoperiod on hypoosmoregulation in brook trout, Salvelinus fontinalis
… ability explains skewed sex ratios in anadromous populations, limits the extent of anadromy, and was a significant phase in the evolution of extended salmonid migration. Anadromous brook trout of Riviere a la Truite, Quebec, were examined for physiological changes associated with …
-
The Swift Water Place: Water Quality, Fish Ecology, and Hydropower in the Merrimack River since the Time of Thoreau
… Dam at Lawrence in 1847 spelled the end of the anadromous fish runs that had populated the Merrimack for centuries. Salmon restoration proceeded for three decades after the Civil War until fish passage failed. Later, water filtration plants allowed communities to draw clean water from the …
-
Genetic Marker-Assisted Management of Virginia Sport Fishes
… population genetic structure, I found that anadromous populations in the Southeast and the Chesapeake Bay were differentiated from landlocked populations in the Roanoke River basin, with an average FST of 0.066. Range-wide, Striped Bass are differentiated between the landlocked and …
-
Monitoring the influx of marine derived Nitrogen and characterizing soil food webs of riparian zones of the Elwha River Watershed, WA, USA.
… areas are marine derived nitrogen (MDN) via anadromous pacific salmon and symbiotic nitrogen fixation via Alnus rubra. The recent removal of two large dams on the Elwha River, WA, opened up ~60 km of previously inaccessible river habitat for pacific salmon. I used naturally abundant stable …
-
An Ecological Comparison Between Resource Subsidies: Pacific Lamprey (<i>Entosphenus tridentatus</i>) and Pacific Salmon (<i>Oncorhynchus</i> spp.)
… streams received annual returns of spawning anadromous fish that provided resource subsidies in the form of marine-derived nutrients (MDN), thus driving stream food web productivity. To date, many studies in the PNW have focused on Pacific salmon (<em>Oncorhynchus </em>spp.) as a resource …
-
The Gut Microbiome and its Relationship to Migratory Behaviour and Fate in Wild Fishes
… composition, driven by the genus Mycoplasma. For anadromous migrations, there was weak evidence that the hindgut microbial composition of adult sockeye salmon varied between spawning populations with a relatively short migration (Weaver Creek) versus the most challenging migration (Chilko River). …
-
CHARACTERIZATION OF MICROSATELLITE LOCI AND PILOT POPULATION GENETIC ANALYSIS IN HICKORY SHAD, ALOSA MEDIOCRIS
… is a relatively understudied species of the anadromous fish sub-family Alosinae. This study, the first population genetic analysis of this species, employed 12 neutral microsatellite loci to estimate genetic diversity and population structure in tributaries of lower Chesapeake Bay, Virginia …
-
The Relative Contribution of Hudson River Tributaries to River Herring Spawning Dynamics
… the relative tributary contribution to anadromous fish spawning dynamics is irrefutably important when prioritizing habitat enhancement, restoration and management decisions (Everly and Boreman, 1999). Collecting sound baseline data becomes critical when seeking out the most significant …
Page 1 of 4