The opportunistic pathogen Pseudomonas aeruginosa possesses two LuxR-LuxI
type quorum-sensing systems that use diffusible acyl-homoserine lactone molecules to
autoinduce and coordinate expression of multiple virulence factors. We conducted a highthroughput
screen for mutants deficient in skim-milk proteolysis—a quorum-sensing
dependent phenotype—using a nonredundant transposon-insertion library representing
most nonessential genes in P....
Thirteen different habitat parameters were measured either quantitatively or
qualitatively around seven different Salix (willow) species on a defined reach of stream
on the southwestern slope of Steens Mountain in southeastern Oregon in order to both
broaden the current information base of riparian ecology and inform future willow
plantings aimed...
Pacific whiting (Merluccius productus) is commercially
and ecologically one of the most important fishery resources
in the Pacific coast of the United States. The fishery
is currently going through a period of rapid and profound
transformation that could cause a substantial redistribution
of benefits among domestic users. Benefits from the...
Seafood is one of the most diverse and highly traded natural resources worldwide. Widespread evidence of increased seafood fraud and IUU fishing has placed enormous pressure on industry and governments to determine the authenticity, safety, and sustainability of seafood. The recently established US National Ocean Council has addressed several gaps...
The movement of Chinook salmon through space and time, across political boundaries, and through fisheries, creates one of the most complex marine resource management problems in the world. Information garnered from the recovery of coded-wire tags (CWTs) has been used since the 1970s to direct management decisions. Growing concern surrounding...
The West Coast salmon fishery presents several complexities that have received little attention in the fisheries economics literature. Two of those complexities are reviewed and analyzed in this dissertation. The first, salmon fishermen participate in alternative fisheries within a season demonstrating a complex switching behavior between different species. Second, the...
Researchers rely on bioeconomic models to guide research and generate fishery management advice for commercial fisheries. Due partly to a paradigm shift towards ecosystem based fishery management, increasing complexity in the characteristics of the problems has meant that bioeconomic simulation models are becoming more prevalent in the fisheries literature. However...
The fishing industry in the Pacific Northwest is a dynamic and highly competitive industry that must constantly respond to rapidly changing resource, regulatory and market forces. These forces have already had a significant impact on our fisheries and will continue to do so as we learn more about the biology...
The relationship between intrinsic fish quality (fish condition before handling), production efficiency, product price, and the optimal management of commercial "wild" fisheries was explored in four companion papers. The optimal management plan-consisting of quotas and harvest schedules - would maximize the discounted net industry revenues (NPV) given a minimum biomass...
Declining harvest levels, static agency research budgets, and increasing tension among scientists, managers, and industry members are the legacy of the present research and management institutions in the West Coast groundfish fishery. Cooperative research, the active participation of the commercial fishing industry in scientific research, is receiving increased attention as...