Publications

The U.S. Fish and Wildlife Service federal protocol for dual disinfection of fish eggs in 50 mg/L iodine solution for 30 min followed by a secondary disinfection in 100 mg/L iodine for 10 min was investigated during six spawning cycles of Atlantic salmon Salmo salar held at the Richard Cronin National Salmon Station (Sunderland, Massachusetts). This population of salmon had undergone an...

Wildlife research conducted by scientists at the Leetown Science Center helps client bureaus to better manage federal lands and trust species by making objective, science-based decisions.

The Leetown Science Center’s research provides information on early detection and assessment, ecological effects and new methods of control of invasive species.

Seawater and natural brines accounted for about 63% of US magnesium compounds production during 2000. Premier Services in Florida, Dow Chemical in Michigan, Martin Marietta Magnesia Specialties, and Rohm & Haas recovered dead-burned and caustic-calcined magnesias from seawater. And Premier Services' recoveries, in Nevada, were from magnasite.

Part of the 2000 annual review of the industrial minerals sector. A general overview of the gemstones industry is provided. Although no extensive commercial mining of gemstones takes place in the U.S., it is the world's leading gemstone market. Total U.S. gemstone trade exceeded $16.9 billion in 2000.

Fourteen captive and five free-ranging Minnesota gray wolves (Canis lupus) were tested for the presence of rabies virus neutralizing antibodies (RVNA) after vaccination with an inactivated canine rabies vaccine. Blood was collected from all wolves prior to vaccination and at 1 mo postvaccination (PV) and from all captive and three wild wolves at 3 mo PV. In addition, one free-ranging...

Collecting capture-recapture data under Pollock?s robust design provides an additional source of information on capture probability that can be used to provide less biased and more efficient estimates of population dynamics parameters. In addition, it can be used to estimate the probability of being available for capture, which in some cases (e.g., breeding proportion) has ecological...

This paper reviews recreation impacts, impact monitoring methods, and impact management strategies and actions for managing visitation in mountain environments.

No abstract available.

Thirty pesticides or their degradates were detected in 315 samples collected from 10 streams in the Lake Erie-Lake St. Clair Basin between March 1996 and February 1998 as part of the U.S. Geological Survey’s National Water-Quality Assessment (NAWQA) Program. Atrazine was detected in every sample, and deethylatrazine, metolachlor, and simazine were detected in more than 90 percent of all...

Peterson (2001) used Genetic Algorithm for Rule-set Prediction (GARP) models to predict distribution patterns from Breeding Bird Survey (BBS) data. Evaluations of these models should consider inherent limitations of BBS data: (1) BBS methods may not sample species and habitats equally; (2) using BBS data for both model development and testing may overlook poor fit of some models; and (3)...

This paper rather informally tells of miscellaneous events that occurred during field work in Mexico, the Pacific Islands, and Virginia over the course of about 35 years.