Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16759
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
Managing and monitoring birds using point counts: Standards and applications Managing and monitoring birds using point counts: Standards and applications
No abstract available.
Authors
C.J. Ralph, Sam Droege, J.R. Sauer
Breeding bird survey: Population trends 1966-92 Breeding bird survey: Population trends 1966-92
The North American Breeding Bird Survey (BBS) was begun in 1966 to collect standardized data on bird populations along more than 3,400 survey routes across the continental United States and southern Canada. The BBS has been used to document distributions and establish continental, regional, and local population trends for more than 250 species. We summarize here survey-wide patterns in...
Authors
Bruce G. Peterjohn, John R. Sauer, Sandra Orsillo
Population modeling and its role in toxicological studies Population modeling and its role in toxicological studies
A model could be defined as any abstraction from reality that is used to provide some insight into the real system. In this discussion, we will use a more specific definition that a model is a set of rules or assumptions, expressed as mathematical equations, that describe how animals survive and reproduce, including the external factors that affect these characteristics. A model...
Authors
John R. Sauer, Grey W. Pendleton
Introduction Introduction
No abstract available.
Authors
D. J. Hoffman, Barnett A. Rattner, G.A. Burton, J. Cairns
Wolves and caribou in Denali National Park, Alaska Wolves and caribou in Denali National Park, Alaska
Management of gray wolves (Canis lupus) and their prey in interior Alaska has been controversial for three decades (Harbo and Dean 1983). Recently, debate was rekindled with renewed interest in wolf control to bolster two populations of caribou (Rangifer tarandus). Our research in Denali National Park provides insights into the declines in caribou numbers over the last few years that are...
Authors
Layne G. Adams, L. David Mech
Colony differences in response to trapping in roseate terns Colony differences in response to trapping in roseate terns
Both members of seabird pairs are normally required to fledge young. Seabirds that nest in sites accessible to predators usually have one parent in attendance during the egg/chick phase. Time devoted to foraging can vary with individual skill and age, prey availability and abundance (Seamy 1978), and distance to foraging grounds (Safina 1990). Although average skill of similar-aged...
Authors
J. Burger, I.C.T. Nisbet, James M. Zingo, J. A. Spendelow, C. Safina, M. Gochfeld