The varying-coefficient model is flexible and powerful for modeling the dynamic changes of regression coefficients. It is important to identify significant covariates associated with response variables, especially for high-dimensional settings where the number of covariates can be larger than the sample size. We consider model selection in the high-dimensional setting...
We described and predicted spatial variation in marine migration (anadromy) of female Oncorhynchus mykiss in the John Day River watershed, Oregon. We collected 149 juvenile O. mykiss across 72 sites and identified locations used by anadromous females by assigning maternal origin (anadromous versus non-anadromous) to each juvenile. These assignments used...
This study applied brand choice model and stated preference data collected in French context by means of choice experiment to investigate value of intrinsic and extrinsic attributes of various fresh seafood species. The estimated models show that the extrinsic attributes (i.e. product forms, production method, and product origin) and intrinsic...
A major problem facing the Seychelles is the decline in the quality and the value of marine protected areas (MPAs). Economic valuation can help guide policy makers to understand the value of marine resources and the cost of neglecting MPAs by expressing the value of their goods and services in...
Capture fisheries and aquaculture in freshwater bodies play a very important role and is considered to have great potential for augmenting fish production as well as diversification of livelihoods in both Cambodia and Vietnam. In Cambodia, inland fisheries remain primary importance in the fisheries sector, while aquaculture is more important...
Session #504 A Benefit-Cost Analysis using ratios of annual costs and benefits was calculated for fish farmers (aquaculture) and fish marketers (including distributors, processors and retailers). Forty five of the 86 respondents had a benefit cost ratio higher than 1. Further analysis investigated effects of selected variables on ratios. Relative...
Various traditional methods are employed to preserve and process Rastrineobola argentea
locally known as dagaa (sardines) an indigenous fish species of Lake Victoria. The widely
used known customarily dagaa and dagaa products preservation methods include sundrying,
smoking, salting and various combinations of these. The advantages of smoking
dagaa are manifold....
This research uses the Institutional Development Analysis (IDA) framework to examine the relationships between the individual levels of enforcement and the commercial trawl fishermen in Newport, Oregon, to determine if there is a difference in relationships and whether those differences impact compliance. While a difference in the relationships between the...
Predators sometimes provide biotic resistance against invasions by nonnative prey. Understanding and predicting the strength of biotic resistance remains a key challenge in invasion biology. A predator's functional response to nonnative prey may predict whether a predator can provide biotic resistance against nonnative prey at different prey densities. Surprisingly, functional...
Most authigenic carbonates previously recovered from the Cascadia slope have Sr-⁸⁷/Sr-⁸⁶ signatures that reflect shallow precipitation in equilibrium with coeval seawater. There is also evidence for carbonate formation supported by fluids that have been modified by reactions with the incoming Juan de Fuca plate (Sr-⁸⁷/⁸⁶(Sr) = 0.7071; Teichert et al.,...
An approach to climate change feedback analysis is described in which tropospheric relative humidity replaces specific humidity as the state variable that, along with the temperature structure, surface albedos, and clouds, controls the magnitude of the response of global mean surface temperature to a radiative forcing. Despite being simply a...
Are pesticides hazardous? That's up to you! This publication outlines safe use, storage, and disposal of pesticides and provides links to more information from the Oregon Department of Environmental Quality and National Pesticide Information Center.
Increased temperatures due to anthropogenic-induced climate change may raise the threat of extinction for taxa with sessile life histories (e.g., plants) in the near future. Linking climate change models to demographic models may provide useful insights into the potential effects of environmental changes on rare plants, and therefore aid in...
Lidar is currently the most accurate method for remote estimation of forest structure, but it has limited spatial and temporal coverage. Conversely, Landsat data are more widely available, but exhibit a weaker relationship with structure under medium to high leaf area conditions. One potentially valuable means of enhancing the relationship...
We investigate the value of the correlation function of an inhomogeneous hard-sphere fluid at contact. This quantity plays a critical role in statistical associating fluid theory, which is the basis of a number of recently developed classical density functionals. We define two averaged values for the correlation function at contact...
This presentation will provide an overview of how the Bureau of Ocean Energy Management (BOEM) uses environmental information for decision-making and the role BOEM’s Environmental Studies Program (ESP) plays in fulfilling information needs to inform Outer Continental Shelf (OCS) resource management decisions.
The ESP conducts and oversees top-quality scientific research...