Wetland and Aquatic Research Center

Publications

Explore WARC's science publications.

Filter Total Items: 2,164
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Year Published: 1991

Methods for analyzing temporal changes in landscape patterns

No abstract available

Dunn, Christopher P.; Sharpe, David M.; Guntenspergen, Glenn R.; Stearns, F.; Yang, Z.

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Year Published: 1991

Estimating wintering Bald Eagle densities in the Mississippi Alluvial Valley

Surveys on the winter distribution of Bald Eagles have been concentrated in the northern USA (Hastings 1988, Mattson 1988), where Bald Eagles are most common. Few density estimates for wintering Bald Eagles exist. In the past, different survey techniques with little standardization have been used. Statistical analyses and error...

Brown, Mike; Nassar, J.R.

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Year Published: 1991

Effects of site, landscape features, and fire regime on vegetation patterns in presettlement southern Wisconsin

The presettlement tree cover (1831–33) of 3 townships in a southern Wisconsin landscape was analyzed using original survey records. Four forest types were identified: closed forest, open forest, savanna, and prairie. Comparisons of vegetation types and landscape pattern were made between the east and west sides of the Pecatonica River, which...

Leitner, Lawrence A.; Dunn, Christopher P.; Guntenspergen, Glenn R.; Stearns, F.; Sharpe, David M.

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Year Published: 1991

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...

Twedt, Daniel J.; Bleier, William J.; Linz, George M.

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Year Published: 1991

Fishes

No abstract available.

Burkhead, Noel M.; Jenkins, R.E.
Fishes; 1991; Book chapter; K. Terwilliger: Virginia's Endangered Species; Burkhead, Noel M.; Jenkins., R. E.

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Year Published: 1991

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...

Smith-Vaniz, William F.; Bohlke, Eugenia B.
William F. Smith-Vaniz and Eugenia B. Böhlke. Proceedings of the Academy of Natural Sciences of Philadelphia. Vol. 143 (1991), pp. 193-206

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Year Published: 1991

Fire regimes in subtropical south Florida

No abstract available.

Snyder, James R.

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Year Published: 1991

Rivulus immaculatus, a new killifish from Venezuela (Cyprinodontiformes, Rivulidae)

Abstract not supplied at this time

Thomerson, J.E.; Nico, L.G.; Taphorn, D.C.
Rivulus immaculatus, a new killifish from Venezuela (Cyprinodontiformes, Rivulidae); 1991; Article; Journal; Copeia; Thomerson, J.E.; Nico, L.G.; Taphorn., D.C.

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Year Published: 1991

A Systematic Revision of the Neotropical Catfish Family Ageneiosidae (Teleostei: Ostariophysi: Siluriformes)

Abstract not supplied at this time

Walsh, S.J.
A Systematic Revision of the Neotropical Catfish Family Ageneiosidae (Teleostei: Ostariophysi: Siluriformes); 1991; Abstract or summary; Journal; Dissertation Abstracts International; Walsh, S.J.

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Year Published: 1991

An evaluation of aerial survey replicate count methodology to determine trends in manatee abundance

Abstract not supplied at this time

Lefebvre, L.W.; Kochman, H.I.
An evaluation of aerial survey replicate count methodology to determine trends in manatee abundance; 1991; Article; Journal; Wildlife Society Bulletin; Lefebvre, L.W.; Kochman., H.I.

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Year Published: 1991

An intergeneric hybrid of a native minnow, the golden shiner, and an exotic minnow, the rudd

The hybrid golden shiner Notemigonus crysoleucas × rudd Scardinius erythrophthalmus is the first known nonsalmonid, intergeneric hybrid of an exotic species and a North American native species. The cross is also the first valid record of a viable hybrid involving the native golden shiner. Meristic and mensural characters...

Burkhead, N.M.; Williams, J.D.
An intergeneric hybrid of a native minnow, the golden shiner, and an exotic minnow, the rudd; 1991; Article; Journal; Transactions of the American Fisheries Society; Burkhead, N. M.; Williams., J. D.