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.
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Showing 1 to 16 of 16 for “"smolt"”.
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The spatial scale of adaptive population differentiation in Atlantic Salmon: local adaptation in smolt migration timing
… it aims to examine variation in the timing of smolt migration among independent tributaries of single river systems and to screen individual fish for molecular genetic variation at neutral microsatellite loci. Through integration of distinct yet complimentary disciplines, genetics and …
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Predicting coastal cutthroat trout molt productive capacity from physiographic variables
… at a watershed scale, influence cutthroat smolt productive capacity. The primary purpose was to produce a practical desktop procedure to reliably predict smolt abundance based upon physiographic variables. A total of 653 annual estimates of smolt abundance from 50 watersheds in British …
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Intestinal physiology in atlantic salmonpreparatory changes during smolting and after seawater entry
… the intestine of Atlantic salmon during the parr-smolt transformation (smolting or smoltification) that precedes migration of juveniles to the ocean. Utilizing an integrative approach, the work primarily aimed to investigate the development of the mechanisms associated with Na+ and Cl- movement …
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Predicting how the juvenile life-stages of anadromous Atlantic salmon Salmo salar influence their migration phenology and marine survival.
… In the spring, the Frome parr metamorphose into ‘smolts’ and commence their emigration downstream to the sea. Previously PIT-tagged individuals are resampled in a trap, remeasured, scanned for their tag code, and then released. PIT-tagged individuals that successfully complete their migration and …
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Food–web implications of reintroducing anadromous salmonids in reservoirs on the North Fork Lewis River, Washington
… potential for reservoir habitat to contribute to smolt production in the Lewis River. To determine whether the Lewis River Reservoirs can support reintroduced populations of juvenile salmonids, we evaluated prey supply and consumption demand of resident fishes to estimate the carrying capacity for …
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Life history and bioenergetic modelling of adfluvial-lacustrine coastal cutthroat trout predation in the Capilano Reservoir : implications for endangered steelhead, coho salmon and future holistic watershed management strategies
… the reservoir consumed 6.4% of coho (O. kisutch) smolt production in 2010. No evidence of cutthroat predation on juvenile steelhead out-migrants was detected, and a gape prey maximum of 36% of predator body length was found. Moderate hybridization rates between cutthroat and rainbow trout were …
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Assessment of the hatchery kokanee (Oncorhynchus nerka) release program in Lake Roosevelt 2009 -- 2012
… Hawk Creek and raising them to the residualized smolt stage at the Spokane Tribal hatchery for release back into Lake Roosevelt. Fall spawning run data (2009 – 2012) were analyzed to assess the percentage and sex ratios of each stock returning to spawn in Lake Roosevelt. We had record returns of …
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Environmental influences on the behavioural ecology of juvenile salmonids – the importance of rearing density
… behaviours, and analysed for fin-erosions and smolt-status. In paper I wild-caught juvenile trout were used for behavioural studies. In papers II-IV fish from different treatment groups were also released in natural streams to investigate treatment effects on survival and growth in the wild. …
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A GIS evaluation of land use dynamics and fish habitat in the salmon river watershed - Langley, B.C.
… and Coghlan Creek for both stream volume and smolt catch numbers. This ratio was consistent for five years between 1979 and 1989 for which reliable data is available. However in 1990 and 1992, smolt catch statistics decreased by half in the Salmon River which coincides with significant …
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An examination of differential survival in downstream migrating coho salmon smolts
The smolt stage of the life history of Pacific salmon (Onchorhynchus sp.) has received little attention relative to the other life history stages. I examined mortality during the downstream migration of coho salmon (0. kisutch) smolts by trapping and marking smolts high in the watershed and …
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Building an In-vitro Cell Model to Study Cellular Basis of Maturation Timing: A Proof of 3D Cell Culture Methodology in Atlantic Salmon Adipose Tissue
… tissue of mature Atlantic salmon (salmon past smolt stage) was first separated into stromal vascular fraction (SVFs) and mature adipose fraction (MAFs). SVFs contain preadipocytes (precursors of adipocyte cells) in addition to a variety of other cell types. MAFs are mature adipocytes. Both MAFs …
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The stress of moving out : physiological and behavioural effects of commercial transport on Atlantic salmon (Salmo salar) smolts
… status of commercially produced Atlantic salmon smolts during transport from freshwater farms to the saltwater net pens using physiology and behaviour to assess transport stress. Smolts were transported first by truck from the freshwater farm to the dock, and then in the flow-through cargo holds …
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Climate Change and Atlantic salmon (Salmo salar): Changes in Flow and Freshwater Habitat in the Burrishoole Catchment
… mortality losses (e.g. fry emergence, smolt migration), changes in climate may result in population collapse - particularly if successive year-classes are affected. The results of the hydrological modelling highlight the sensitivity of smaller spatey catchments to changes in climate. …
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The drivers and implications of spatial and temporal variation in the feeding ecology of juvenile Chinook Salmon
… productivity or nutrient source) predicts their smolt survival. In turn, large-scale climate variability determines the δ13C values of salmon—thus mechanistically linking climate to survival through feeding ecology. These results suggest that qualities propagated upwards from the base of the food …
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The Genetic Architecture of Juvenile Migration in Rainbow Trout (Oncorhynchus mykiss)
… physiological adaptations in a process called smoltification. And while much is known of the behavior, ecology, and physiology of the smoltification process and the migratory life history, little is known of the underlying genetic architecture modulating this adaptive tactic. Using quantitative …
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Seawater survival and osmoregulation of Atlantic salmon (Salmo salar) parr-smolts exposed to four different pesticides
Atlantic salmon (Salmo salar) parr-smolts were exposed to sublethal concentrations of cypermethrin, chlorothalonil, quintozene or atrazine to determine if they affected osmoregulation. After 96 h of exposure to a pesticide, Na+K+-ATPase, hematocrit, liver somatic index (LSI), plasma sodium, …