John R. Skalski

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MAKES ANY WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, with respect to the accuracy, completeness, or usefulness of the information contained in this report, or that the use of any information, apparatus, process, or composition disclosed in this report may not infringe privately owned rights; or Assumes any liabilities with respect to the use of, or for(More)
—Juvenile Chinook salmon Oncorhynchus tshawytscha emigrating from natal tributaries of the Sacramento River must negotiate the Sacramento–San Joaquin River Delta, a complex network of natural and man-made channels linking the Sacramento River with San Francisco Bay. Natural processes and water management actions affect the fractions of the population using(More)
ii Acknowledgements The authors would like to give special recognition to Jim Norris and Ian Fraser of Marine Resources Consultants who were central in the development of this program and continue to play a central role in the ongoing monitoring. They and their other staff that crew the field vessels showed great dedication and spent many hours of ship time(More)
Marine intertidal organisms in Prince William Sound were exposed to crude oil following the TN Exxon Valdez oil spill in 1989. The intertidal communities were also subjected to mechanical disturbance during invasive oil spill remediation and cleanup efforts. Using monitoring data collected from 1989 to 1997, impacts and eventual recovery were assessed at(More)
Bioassays were used in a three-phase research project to (a) assess the comparative sensitivity of test organisms to known classes of chemicals, (b) determine if the chemical components in field soil and water samples of unknown chemical composition could be inferred from laboratory studies using pure chemicals and (c) investigate kriging (a relatively new(More)
We suggest that ecological processes and physical characteristics possess an inherent scale at which the processes or characteristics occur over the landscape. We propose a conceptual spatial response model that describes the nature of this ecological scale. Based on the proposed spatial model, we suggest methods for estimating the size of study plots or(More)
Most protected areas are too small to sustain populations of wide-ranging mammals; thus, identification and conservation of high-quality habitat for those animals outside parks is often a high priority, particularly for regions where extensive land conversion is occurring. This is the case in the vicinity of Emas National Park, a small protected area in the(More)
Populations of juvenile salmon emigrating from natal rivers to the ocean must often traverse different migratory pathways that may influence survival. In regulated rivers, migration routes may consist of a network of channels such as in the Sacramento-San Joaquin River Delta, or of different passage structures at hydroelectric dams (e.g., turbines or(More)
The sensitivity of trout ova and sperm to 1-T magnetic fields was investigated. It was determined that 1) overall test results combining seven independent Z-statistics demonstrated a significant (alpha less than 0.0001) enhancement of fertilization when ova alone were exposed to the magnetic field prior to fertilization; 2) similarly, overall test results(More)