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Browsing Fisheries by Title
Now showing items 103-122 of 238
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Identifying shifts in maternity den phenology and habitat characteristics of polar bears (Ursus maritimus) in Baffin Bay and Kane Basin
The phenology and habitat selection of polar bear (Ursus maritimus) maternity dens may change over time in response to shifting environmental conditions. This study compared satellite telemetry data on 40 adult females ... -
Impact of Ocean Acidification on Recruitment and Yield of Bristol Bay Red King Crab
(2013-07-23)The excess of anthropogenic carbon dioxide (CO2) produced since the industrial revolution is being absorbed by the oceans through the carbon cycle. Atmospheric carbon dioxide has increased about 40% since the preindustrial ... -
Impacts of temperature on the molecular response of shellfish
Climate change is causing the average global ocean temperature to increase. In the face of ocean warming, the majority of marine organisms will be impacted by this shift in thermal regimes. There will likely be some species, ... -
Implications of climate change for strategic conservation and restoration of tidal wetlands in the U.S. portion of the Salish Sea
Coastal ecosystems are potentially at risk of sea level rise and other accelerated changes in climate. The overall goal of this thesis was to explore the potential influences of spatially varied climate change impacts on ... -
Implications of demographic diversity for forage fish, their fisheries, and ecosystems
Forage fish play a key role in marine ecosystems and fisheries worldwide. They are highly productive, and undergo dramatic fluctuations in productivity, which interact with fishing pressure and spatial dynamics to generate ... -
Implications of Environmental and Landscape Change for Population Connectivity and the Persistence of Aridland Amphibians
The study of how population structure and persistence are shaped by attributes of species and the environment is a central scientific pursuit in ecology and conservation. In this dissertation, I explore four themes central ... -
Inbreeding and its consequences for genetic variation and early life history in chinook salmon
(2001)As a necessary background for my experimental studies, I reviewed inbreeding and its consequences and the relationship between genetic variability and fitness in salmonid fishes. Inbreeding directly reduces individual ... -
Incorporating an otolith-derived environmental index into growth for stock assessment models
Growth is one of the key demographic processes for population dynamics. There is a growing body of literature showing that growth in fish is plastic over time, and affected by climate variability. However, time-varying ... -
Incorporating model selection and decision analysis into population dynamics modeling
(2006)Model selection tools are an integral part of biological inference. However, with the advent of recent software packages, researchers may be placing less thought into model selection uncertainty. After reviewing the existing ... -
Influence of early life growth and precipitation zone on survival to adulthood in wild Steelhead Trout (Oncorhynchus mykiss) in the Skagit River basin, WA
(2013-11-14)Wild Steelhead Trout, Oncorhynchus mykiss, in the Puget Sound are currently in decline, and very little is known about the early life history of these threatened fish. This study evaluated consequences of early life growth ... -
The influence of individual transferable quotas on discarding and fishing behavior in multispecies fisheries
(2004)Under individual transferable quotas (ITQs), participants receive a share of the total allowable catch (TAC), can choose when to fish, and can sell or lease their share. ITQs generally increase fishing flexibility, improve ... -
Influence of Juvenile and Adult Experiences on Tributary Overshoot and Fallback by Steelhead in the Columbia River Basin
Tributary overshoot occurs when adult fishes homing to natal sites continue upstream past the mouth of their natal stream. Using multistate release-recapture models, I examined the prevalence of overshooting and fallback ... -
Influence of urbanization on the health of juvenile salmonids in Pacific Northwest perennial streams
Increasing population and urbanization leads to stress in freshwater systems from a variety of anthropogenic influences including structural changes to habitat, temperature effects from increased runoff and reduced canopy ... -
Influences of beaver (Castor canadensis) activity on ecology and fish assemblages of dryland streams
(2014-02-24)After near-extirpation in the early 20th century, beaver populations are increasing throughout many parts of North America. Simultaneously, there is an emerging interest in employing beaver activity for stream restoration ... -
Information transfer, heterogeneity, and local environmental effects on emergent group patterns defining fish schools: perspectives from different scales of observation
It is widely understood why animals group, but much less is known about how animals group. Not all group structure provides functional benefit to the individuals therein; however, those group structures that do provide ... -
Informative Data and Uncertainty in Fisheries Stock Assessment
Uncertainty is an integral part of fisheries stock assessment. Successful resource management requires scientific analysis to evaluate the uncertainty about the status of each stock and related quantities of interest. A ... -
Informing salmon conservation with population models that account for individual heterogeneity
Managing threatened species requires information on their status and predictions of their response to management and environmental change. To develop this information, we often collect data and use them to parameterize ... -
Integration of tagging and population dynamics models in fisheries stock assessment
(1998)An integrated tagging and population dynamics model is developed, tested, and applied to the SNA1 snapper (Pagrus auratus) stock off the east coast of the North Island of New Zealand. An Integrated Model (IM) is a model ... -
Intra and inter-annual patterns of juvenile Pacific salmon (Oncorhynchus) growth in the Strait of Georgia, British Columbia
Early marine growth in juvenile salmon is positively correlated with overall survival to reproductive age. This study consists of two parts, in the first, regional patterns of juvenile coho (Oncorhynchus kisutch), Chinook ... -
Investigating the features that facilitate sexual parasitism in male Anglerfishes (Teleostei, Ceratioidei)
Deep-sea anglerfishes (Ceratioidei) remain some of the most enigmatic fishes in the world. The sexual dimorphism seen in this group is the most extreme example amongst vertebrates. Male anglerfishes develop a specialized ...