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Year Published: 2011

Efficiency of time-lapse intervals and simple baits for camera surveys of wild pigs

Growing concerns surrounding established and expanding populations of wild pigs (Sus scrofa) have created the need for rapid and accurate surveys of these populations. We conducted surveys of a portion of the wild pig population on Fort Benning, Georgia, to determine if a longer time‐lapse interval than had been previously used in surveys of wild...

Williams, B.L.; Holtfreter, R.W.; Ditchkoff, S.S.; Grand, James B.

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Year Published: 2011

Environmental controls of wood entrapment in upper Midwestern streams

Wood deposited in streams provides a wide variety of ecosystem functions, including enhancing habitat for key species in stream food webs, increasing geomorphic and hydraulic heterogeneity and retaining organic matter. Given the strong role that wood plays in streams, factors that influence wood inputs, retention and transport are critical to...

Merten, Eric C.; Finlay, Jacques; Johnson, Lucinda; Newman, Raymond; Stefan, Heinz; Vondracek, Bruce C.
Environmental controls of wood entrapment in upper Midwestern streams; 2011; Article; Journal; Hydrological Processes; Merten, E. C.; Finlay, J.; Johnson, L.; Newman, R.; Stefan, H.; Vondracek, B.

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Year Published: 2011

Evaluating gull diets: A comparison of conventional methods and stable isotope analysis

Samples such as regurgitated pellets and food remains have traditionally been used in studies of bird diets, but these can produce biased estimates depending on the digestibility of different foods. Stable isotope analysis has been developed as a method for assessing bird diets that is not biased by digestibility. These two methods may provide...

Weiser, Emily L.; Powell, Abby N.
Evaluating gull diets: A comparison of conventional methods and stable isotope analysis; 2011; Article; Journal; Journal of Field Ornithology; Weiser, E. L.; Powell, A. N.

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Year Published: 2011

Fish entrainment rates through towboat propellers in the Upper Mississippi and Illinois rivers

A specially designed net was used to study fish entrainment and injury through towboat propellers in 13 pools of the Upper Mississippi and Illinois rivers. The net was attached to the stern of a 48.8‐m‐long towboat with twin propellers (in Kort propulsion nozzles), and sampling typically took place while the towboat pushed 15 loaded barges...

Jack, Killgore K.; Miranda, Leandro E.; Murphy, C.E.; Wolff, D.M.; Hoover, J.J.; Keevin, T.M.; Maynord, S.T.; Cornish, M.A.

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Year Published: 2011

Genetic analysis of scats reveals minimum number and sex of recently documented mountain lions

Recent records of mountain lions Puma concolor and concurrent declines in desert bighorn sheep Ovis canadensis mexicana on Kofa National Wildlife Refuge in Arizona, United States, have prompted investigations to estimate the number of mountain lions occurring there. We performed noninvasive genetic analyses and identified species, individuals, and...

Naidu, Ashwin; Smythe, Lindsay A.; Thompson, Ron W.; Culver, Melanie

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Year Published: 2011

Genetic identity of Thamnophis sp. using microsatellite genetic markers

Butler’s gartersnake (Thamnophis butleri) was previously listed by the Wisconsin Department of Natural Resources as a state threatened species. Several key questions associated with species identity, integrity, and hybridization with other gartersnake species needed to be addressed to further refi ne the management plan for this species. The...

Sloss, Brian L.

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Year Published: 2011

Genetic methods for biodiversity assessment

No abstract available.

Culver, Melanie; Fitak, Robert R.; Herrmann, Hans-Werner

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Year Published: 2011

Grassland bird use of oak barrens and dry prairies in Wisconsin

Grassland bird populations have declined more than any other group of birds in North America and are of conservation concern to state and federal agencies. We determined relative abundances of grassland birds in oak barrens and dry sand prairies—native habitat types rare in the state of Wisconsin. We also investigated the association of...

Vos, Susan M.; Ribic, Christine A.
Grassland bird use of oak barrens and dry prairies in Wisconsin; 2011; Article; Journal; Natural Areas Journal; Susan, M. V.; Ribic, C. A.

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Year Published: 2011

Habitat selection and overlap of Atlantic salmon and smallmouth bass juveniles in nursery streams

Introduced smallmouth bass Micropterus dolomieu have invaded much of the historic freshwater habitat of Atlantic salmon Salmo salar in North America, yet little is known about the ecological interactions between the two species. We investigated the possibility of competition for habitat between age-0 Atlantic salmon and age-0...

Wathen, G.; Coghlan, S.M.; Zydlewski, Joseph D.; Trial, J.G.
Habitat selection and overlap of Atlantic salmon and smallmouth bass juveniles in nursery streams; 2011; Article; Journal; Transactions of the American Fisheries Society; Wathen, G.; Coghlan, Jr. , S. M.; Zydlewski, J.; Trial, J. G.

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Year Published: 2011

Hepatic element concentrations of lesser scaup (Aythya affinis) during spring migration in the upper Midwest

High concentrations of some hepatic elements might be contributing to the decline of the continental lesser scaup (Aythya affinis) population. We evaluated hepatic element concentrations of male and female lesser scaup collected from the upper Midwest (Iowa, Minnesota, North Dakota, and South Dakota) during the 2003 and 2004 spring migrations. We...

Pillatzki, Angela E.; Neiger, Regg D.; Chipps, Steven R.; Higgins, Kenneth F.; Thiex, Nancy; Afton, Alan D.

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Year Published: 2011

Hepatic element concentrations of lesser scaup (aythya affinis) during spring migration in the upper midwest

High concentrations of some hepatic elements might be contributing to the decline of the continental lesser scaup (Aythya affinis) population. We evaluated hepatic element concentrations of male and female lesser scaup collected from the upper Midwest (Iowa, Minnesota, North Dakota, and South Dakota) during the 2003 and 2004 spring migrations. We...

Pillatzki, A.E.; Neiger, R.D.; Chipps, Steven R.; Higgins, K.F.; Thiex, N.; Afton, Alan D.

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Year Published: 2011

Identification and evaluation of shark bycatch in Georgia's commercial shrimp trawl fishery with implications for management

Many US states have recreational and commercial fisheries that occur in nursery areas occupied by subadult sharks and can potentially affect their survival. Georgia is one of few US states without a directed commercial shark fishery, but the state has a large, nearshore penaeid shrimp trawl fishery in which small sharks occur as bycatch. During...

Belcher, C.N.; Jennings, C.A.
Identification and evaluation of shark bycatch in Georgia's commercial shrimp trawl fishery with implications for management; 2011; Article; Journal; Fisheries Management and Ecology; Belcher, C. N.; Jennings, C. A.