Publications
Explore WARC's science publications.
Filter Total Items: 3502
Ecology and management of postbreeding waterfowl 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 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...
Authors
James B. Grace, Janet R. Keough, Glenn R. Guntenspergen
Factors influencing the distribution of blackchin tilapia Sarotherodon melanotherodon (Osteichthyes: Cichlidae) in the Indian River system, Florida Factors influencing the distribution of blackchin tilapia Sarotherodon melanotherodon (Osteichthyes: Cichlidae) in the Indian River system, Florida
The blackchin tilapia, Sarotherodon melanotheron, was first collected from the Indian River system, in Brevard County, Florida, in 1980. Since its introduction, this species has expanded its range northward along the coast approximately 37 km, to just north of Whites Point, Brevard County, and southward about 68 km to Vero Beach, Indian River County. Laboratory studies on salinity...
Authors
Dawn P. Jennings, J.D. Williams
Alternate reproductive strategies in the California gull 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...
Authors
Bruce H. Pugesek, P. Wood
Selective dipnetting of largemouth bass during electrofishing 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...
Authors
Daniel J. Twedt, W. Clell Guest, Bobby W. Farquhar
Genetic variation in male Yellow-headed Blackbirds from the northern Great Plains 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...
Authors
Daniel J. Twedt, William J. Bleier, George M. Linz
Comparison of algorithms for replacing missing data in discriminant analysis Comparison of algorithms for replacing missing data in discriminant analysis
We examined the impact of different methods for replacing missing data in discriminant analyses conducted on randomly generated samples from multivariate normal and non-normal distributions. The probabilities of correct classification were obtained for these discriminant analyses before and after randomly deleting data as well as after deleted data were replaced using: (1) variable means...
Authors
Daniel J. Twedt, D.S. Gill
Disappearing coastal wetlands Disappearing coastal wetlands
No abstract available.
Authors
James B. Johnston, Donald W. Field, Anthony J. Reyer
Dispersal of exotic species from aquaculture sources, with emphasis on freshwater fishes Dispersal of exotic species from aquaculture sources, with emphasis on freshwater fishes
Abstract not supplied at this time
Authors
W.R. Courtenay, J.D. Williams
Acute toxicity testing of sediments Acute toxicity testing of sediments
No abstract available.
Authors
Pasquale F. Roscigno, Arthur V. Stiffey, W. David Burke, Diane K. Arwood
Fossil sea turtles from the early Pliocene Bone Valley Formation, central Florida Fossil sea turtles from the early Pliocene Bone Valley Formation, central Florida
No abstract available.
Authors
C.K. Dodd, G.S. Morgan
The boulder darter: a conservation challenge The boulder darter: a conservation challenge
Abstract not supplied at this time
Authors
N.M. Burkhead, J.D. Williams