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Filter Total Items: 3509

Geographic and temporal variation in the diet of Yellow-headed Blackbirds Geographic and temporal variation in the diet of Yellow-headed Blackbirds

Yellow-headed Blackbirds (Xanthocephalus xanthocephalus) are presumed predators of sunflower (Helianthus annuus) in the northern Great Plains. Their esophageal contents varied temporally and among three provinces and three states in relation to regional agricultural bases but males contained more sunflower and small grains than females whereas females contained more weed seeds and...
Authors
Daniel J. Twedt, William J. Bleier, George M. Linz

The measurement of mangrove characteristics in southwest Florida using spot multispectral data The measurement of mangrove characteristics in southwest Florida using spot multispectral data

An intensive in situ sampling program near Marco Island, Florida during 19–23 October 1988 collected information on mangrove type, maximum canopy height, and percent canopy closure. These data were correlated with selected vegetation index information derived from analysis of SPOT multispectral (XS) data obtained on 21 October 1988. The Normalized Difference (ND) vegetation index...
Authors
John R. Jensen, Hongyue Lin, Xinghe Yang, Elijah Ramsey III, Bruce M. Davis, Chris W. Thoemke

Fishes Fishes

No abstract available.
Authors
Noel M. Burkhead, R.E. Jenkins

Additions to the ichthyofauna of the Bahama Islands, with comments on endemic species Additions to the ichthyofauna of the Bahama Islands, with comments on endemic species

Literature records or other documentation are given for 57 species of shorefishes added to the Bahaman ichthyofauna since publication of Fishes of the Bahamas; included are 32 new species described or discovered since 1967. Known distribution is specified for each species, including extralimital ranges of non-endemics. Fourteen species are listed as known only from the Bahamas although...
Authors
William F. Smith-Vaniz, Eugenia B. Bohlke

Suggestions to authors of the reports of the United States Geological Survey Suggestions to authors of the reports of the United States Geological Survey

Suggestions to Authors (STA) is used as the writing style guide for the U.S. Geological Survey (USGS) technical reports and maps. The STA is widely distributed in paper outside of the USGS as a basic scientific writing style guide for scientists, students, and editors. The goal of STA is to help writers present information as clearly as possible explaining punctuation rules, suggesting...
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