Publications
Explore WARC's science publications.
Filter Total Items: 3377
The effects of habitat productivity on competition intensity
No abstract available.
Authors
James B. Grace
Using GIS to determine the effects of contaminated sediments on natural resources in an estuary
No abstract available.
Authors
P.F. Roscigno, G. M. Martin, J. B. Johnston, Mary C. Watzin
A geographic information systems technique for monitoring contaminants in Galveston Bay, Texas
A geographic information system (GIS) was used to compile a series of databases containing details concerning metal contamination and pollution sources to study their impacts on the Galveston Bay (TX) ecosystem. Using these databases, a series of maps with various overlays was created with ARC/INFO software. These maps allowed patterns of spatial distribution of numerous variables to be easily vis
Authors
Marcia McNiff, P.F. Roscigno, W. Ji
Multiple temporal and spatial remote sensing data as inputs into a landcover resource geographic information system
No abstract available.
Authors
Elijah Ramsey III, Craig A. Johnson
Preliminary analysis of spectral data collected for the purpose of wetland discrimination
No abstract available.
Authors
Elijah Ramsey III, R. Spell, James B. Johnston
Knowledge-based gis approaches: A prototype expert system for wetland resource management
No abstract available.
Authors
Wei Ji, James B. Johnston, Marcia McNiff, Loyd C. Mitchell
Canvasback food density in the Mississippi River Delta: Habitat and temporal differences
No abstract available
Authors
Ronald R. Bielefeld, Alan D. Afton
Ecology and management of postbreeding waterfowl
No abstract available.
Authors
William L. Hohman, C. Davison Ankney, David H. Gordon
Size bias in traditional analyses of substitutive competition experiments
The objective of this study was to examine the claim that traditional measures of competitive performance in substitutive experiments are biased towards larger plants. Results from a three-year diallele experiment of 6 marsh plant species were analyzed using both Relative Yields (a traditional analysis) and the Relative Efficiency Index (a recently proposed analysis presumed to be size-independent
Authors
James B. Grace, Janet R. Keough, Glenn R. Guntenspergen
Alternate reproductive strategies in the California gull
We analysed 6 years of reproduction data for 176 California gulls (Larus californicus) surviving from 1980 to 1988. Using a statistical model adapted from Rao's (1958) and Tucker's (1966) generalized growth curve analysis, we reconstructed the reproductive patterns of gulls aged from 0 to 26 years. Individuals were highly consistent in following one of two patterns of reproduction. In a primary pa
Authors
Bruce H. Pugesek, P. Wood
Selective dipnetting of largemouth bass during electrofishing
We electrofished 10 north‐central Texas reservoirs from 1987 through 1990 by either dipnetting all electroshocked fish (intensive dipnetting) or selectively dipnetting only fish visually identified as largemouth bass Micropterus salmoides. We compared selected indices of population structure (proportional stock density, relative stock density, and young–adult ratio) and abundance (catch per unit e
Authors
Daniel J. Twedt, W. Clell Guest, Bobby W. Farquhar
Genetic variation in male Yellow-headed Blackbirds from the northern Great Plains
Electrophoretic differences at 15 presumptive loci were used to assess allelic frequencies, heterozygosities, and polymorphism for male Yellow-headed Blackbirds (Xanthocephalus xanthocephalus) collected in east-central Alberta, north-central North Dakota, and east-central South Dakota. Five loci were polymorphic and mean heterozygosities ranged from 0.119 to 0.133. Significant differences were det
Authors
Daniel J. Twedt, William J. Bleier, George M. Linz