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Articles 1 - 12 of 12
Full-Text Articles in Life Sciences
13th Biennial Cheese Industry Conference, Various Authors
13th Biennial Cheese Industry Conference, Various Authors
Cheese Industry Conference
No abstract provided.
Adding Nutrients To Enhance The Growth Of Endangered Sockeye Salmon: Trophic Transfer In An Oligotrophic Lake, Phaedra E. Budy, Chris Luecke, Wayne A. Wurtsbaugh
Adding Nutrients To Enhance The Growth Of Endangered Sockeye Salmon: Trophic Transfer In An Oligotrophic Lake, Phaedra E. Budy, Chris Luecke, Wayne A. Wurtsbaugh
Watershed Sciences Faculty Publications
Snake River sockeye salmon Oncorhynchus nerka, listed under U.S. law as endangered in 1991 in response to a decline in anadromous adult numbers, spend their first 1–2 years in Redfish Lake, Idaho, before migrating to the sea. To determine how nutrient enhancement might influence phytoplankton, zooplankton, and fish production, we performed fertilization experiments in large enclosures in this oligotrophic lake using juvenile kokanee (lacustrine O. nerka) as analogues for endangered sockeye salmon. Fertilization of the metalimnion substantially increased chlorophyll a (150%), phytoplankton biovolume (75%), primary productivity (250%), and zooplankton biomass (200%), and moderately increased fish growth (12%) over our control …
The Role Of Anadromous Sockeye Salmon (Oncorhynchus Nerka) In The Nutrient Loading And Productivity Of The Sawtooth Valley Lakes, Idaho, H. P. Gross, Wayne A. Wurtsbaugh, Chris Luecke
The Role Of Anadromous Sockeye Salmon (Oncorhynchus Nerka) In The Nutrient Loading And Productivity Of The Sawtooth Valley Lakes, Idaho, H. P. Gross, Wayne A. Wurtsbaugh, Chris Luecke
Watershed Sciences Faculty Publications
We constructed a simulation model for Redfish Lake, Idaho, using water budget and nutrient loading measurements, to predict the dependence of lake production on nutrients from the watershed, precipitation, lake fertilization, and marine-derived nutrients from sockeye salmon Oncorhynchus nerka, which historically have reared in the lake. We also used the model to simulate different management scenarios to help restore the endangered Snake River sockeye salmon. The model and other empirical evidence indicated that even before hydropower dams were present in the migration corridor, marine-derived nutrients were not of major importance to lake production, contributing only about 3% of the annual …
1998 Annual Meeting, Various Authors
Udder Disease Of Sheep, Clell V. Bagley
Udder Disease Of Sheep, Clell V. Bagley
All Archived Publications
No abstract provided.
Self-Organization Of Foraging Behaviour: From Simplicity To Complexity Without Goals, Frederick D. Provenza, Juan J. Villalba, Carl D. Cheney, Scott J. Werner
Self-Organization Of Foraging Behaviour: From Simplicity To Complexity Without Goals, Frederick D. Provenza, Juan J. Villalba, Carl D. Cheney, Scott J. Werner
Behavioral Education for Human, Animal, Vegetation, and Ecosystem Management (BEHAVE)
A herbivore faces challenges while foraging--ongoing changes in its physiological condition along with variation in the nutrient and toxin concentrations of foods, spatially and temporally--that make selecting a nutritious diet a vital affair. Foraging behaviours arise from simple rules that operate across levels of resolution from cells and organs to individuals and their interactions with social and physical environments. At all these levels, behaviour is a function of its consequences: a behaviour operating on the environment to induce changes is itself changed by those events. Thus, behaviour emerges from its own functioningbehaviour self-organizes-not from that of its surroundings. This ostensible …
Selecting Linear-Score Distributions For Modeling Milk-Culture Results, H. G. Allore, David J. Wilson, H. N. Erb, P. A. Oltenacu
Selecting Linear-Score Distributions For Modeling Milk-Culture Results, H. G. Allore, David J. Wilson, H. N. Erb, P. A. Oltenacu
Animal, Dairy, and Veterinary Science Faculty Publications
The data for this cross-sectional retrospective study are from surveys of 65 dairy-cattle herds in central New York, USA sampled between February, 1993 and March, 1995. The objective was to identify probability distributions of logarithmically transformed somatic-cell counts (linear score) for use in a simulation model of mastitis and milk quality. Probability density functions were estimated using maximum-likelihood estimators for the linear score of individual-cow composite milk samples culture negative and culture positive for the pathogens Streptococcus agalactiae, Streptococcus non-agalactiae, Staphylococcus aureus, and coagulase-negative staphylococci for the complete dataset and by bulk-tank somatic-cell count group (< 500 000, ≥ 500 000 SCC/ml). Based on the rankings of three goodness-of-fit tests (Anderson-Darling, Kolmogorov-Smirnov and x2 …
Endangered And Threatened Animals Of Utah, Jack H. Berryman Institute, U.S. Fish And Wildlife Service, Division Of Wildlife Resources
Endangered And Threatened Animals Of Utah, Jack H. Berryman Institute, U.S. Fish And Wildlife Service, Division Of Wildlife Resources
All U.S. Government Documents (Utah Regional Depository)
No abstract provided.
Dispersal Patterns Of Subadult And Adult Colorado Squawfish In The Upper Colorado River, D. B. Osmundson, Ronald J. Ryel, M. E. Tucker, D. B. Burdick, W. R. Elmblad, T. E. Chart
Dispersal Patterns Of Subadult And Adult Colorado Squawfish In The Upper Colorado River, D. B. Osmundson, Ronald J. Ryel, M. E. Tucker, D. B. Burdick, W. R. Elmblad, T. E. Chart
Wildland Resources Faculty Publications
Abstract.—We investigated distribution and dispersal patterns of subadult and adult Colorado squawfish Ptychocheilus lucius (recently renamed the Colorado pikeminnow) throughout their range in the upper Colorado River. Annual, river-wide, capture–recapture data were used to document movements during a 5-year period (1991–1995). Average total length of Colorado squawfish progressively increased upstream: juveniles and subadults occurred almost exclusively in the lowermost 105 km of the 298-km study area, whereas most adults were concentrated in the uppermost 98 km. This was most pronounced early in the study and less so later due to the effect of two or three strong year-classes that dispersed …
Cantagious Foot Rot Of Sheep, Clell V. Bagley
Cantagious Foot Rot Of Sheep, Clell V. Bagley
All Archived Publications
No abstract provided.
Endangered And Threatened Animals Of Utah, Utah State University Extension
Endangered And Threatened Animals Of Utah, Utah State University Extension
All Archived Publications
No abstract provided.
Cantagious Foot Rot - An Update, Clell V. Bagley
Cantagious Foot Rot - An Update, Clell V. Bagley
All Archived Publications
No abstract provided.