Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16746
Pulling the rug out from under California: Seismic images of the Mendocino Triple Junction region Pulling the rug out from under California: Seismic images of the Mendocino Triple Junction region
The active tectonic regime of northwestern California changes abruptly from transform motion to subduction at the Mendocino Triple Junction. Northward migration of the triple junction has been a major factor in the tectonic history of the continental margin of California since the Oligocene and continues at present. Understanding the effects of triple junction migration on the structure...
Authors
Anne M. Trehu
Protein retention and liver aminotransferase activities in Atlantic salmon fed diets containing different energy sources Protein retention and liver aminotransferase activities in Atlantic salmon fed diets containing different energy sources
Atlantic salmon (Salmo salar) fingerlings (14.4 g) were fed diets containing either glucose, dextrin, raw corn starch and lipid, or a high protein U.S. Fish and Wildlife Service open-formula diet (ASD2-30) for 12 weeks. Significant differences in weight gain and feed: gain ratio were not observed among salmon fed the diets containing glucose, dextrin or ASD2-30. Diets containing dextrin...
Authors
K. Fynn-Aikins, S. G. Hughes, G.W. Vandenberg
Canvasback ducks Canvasback ducks
Canvasbacks (Aythya valisineria) are unique to North America and are one of our most widely recognized waterfowl species. Unlike other ducks that nest and feed in uplands, diving ducks such as canvasbacks are totally dependent on aquatic habitats throughout their life cycle. Canvasbacks nest in prairie, parkland, subarctic, and Great Basin wetlands; stage during spring and fall on...
Authors
William L. Hohman, G.Michael Haramis, Dennis G. Jorde, Carl E. Korschgen, John Y. Takekawa
Seasonal and annual changes in the diet of double-crested cormorants: implications for Lake Ontario's fishery Seasonal and annual changes in the diet of double-crested cormorants: implications for Lake Ontario's fishery
No abstract available.
Authors
R. M. Ross, J. H. Johnson
Circulating growth hormone, cortisol and thyroxine levels after 24 h seawater challenge of yearling coho salmon at different developmental stages Circulating growth hormone, cortisol and thyroxine levels after 24 h seawater challenge of yearling coho salmon at different developmental stages
The response of the endocrine system to short-term exposure to sea water (SW) was examined before, during and after the parr-smolt transformation of coho salmon. Five transfers of yearling coho salmon (Oncorhynchus kisutch) from fresh water (FW) to FW, or from FW to SW for 24 h were carried out between March and September. Condition factor declined significantly in late April, and gill...
Authors
G. Young, Stephen D. McCormick, Bjorn Thrandur Bjornsson, H. A. Bern
Apparent digestibility coefficients of carbohydrates for white sturgeon Apparent digestibility coefficients of carbohydrates for white sturgeon
Apparent digestibility coefficients (ADCs) were determined for white sturgeons (Acipenser transmontanus) fed purified diets containing different carbohydrates. White sturgeons were fed, at a rate of 1.0% body weight!d, diets containing one of nine carbohydrates, and feces were collected by manual stripping following a 2‐week feeding period; chromium sesquioxide (Cr2O3) was used as an...
Authors
M.A. Herold, S. S. O. Hung, K. Fynn-Aikins
Mark-resighting analysis of a California gull population Mark-resighting analysis of a California gull population
California gulls (Larus californicus) of known age and sex were censused on their breeding colony in 1979, 1980 and 1984 through 1993. Ages of 235 males and 196 females ranged from 4 to 27 years. Age classes used in the analysis were limited to 17, 4 through 19, and 20 or more as a final age category because data on gulls over 20 were sparse. Survival declined with age in a way that was
Authors
Bruce H. Pugesek, Chris Nations, K.L. Diem, Roger Pradel
Assessing animal condition, nutrition, and stress from urine in snow: A critical view and response Assessing animal condition, nutrition, and stress from urine in snow: A critical view and response
No abstract available.
Authors
D. Saltz, Gary C. White, R.M. Bortmann, G. D. DelGiudice, M.R. Riggs, L.D. Mech, U.S. Seal
Mycotoxin-induced disease in captive whooping cranes (Grus americana) and sandhill cranes (Grus canadensis) Mycotoxin-induced disease in captive whooping cranes (Grus americana) and sandhill cranes (Grus canadensis)
In 1987, an epizootic in cranes at the Patuxent Wildlife Research Center, Laurel, Maryland, USA, caused illness in 80% of 300 captive whooping cranes (Grus americana) and sandhill cranes (Grus canadensis) and death of 15 of these cranes. Gross pathology findings were inconclusive and consisted of dehydration, atrophy of fat, renal insufficiency, and small spleens. Extensive testing...
Authors
Glenn H. Olsen, J. W. Carpenter, G.F. Gee, N. J. Thomas, F. J. Dein
Purple martin population trends from the North American Breeding Bird Survey, 1966-1994 Purple martin population trends from the North American Breeding Bird Survey, 1966-1994
No abstract available.
Authors
B.G. Peterjohn, J.R. Sauer
Exposure and effects of oilfield brine discharges on western sandpipers (Calidris mauri) in Nueces Bay, Texas Exposure and effects of oilfield brine discharges on western sandpipers (Calidris mauri) in Nueces Bay, Texas
No abstract available.
Authors
Barnett A. Rattner, J.L. Capizzi, Kirk A. King, L. J. LeCaptain, M. J. Melancon
Warbling vireos breeding in Issaquena County, Mississippi Warbling vireos breeding in Issaquena County, Mississippi
No abstract available.
Authors
C.O. Nelms, D.J. Twedt, J. Henne-Kerr