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Year Published: 2010

Habitat selection and abundance of young-of-year smallmouth bass in north temperate lakes

Habitat use during early life history plays an important role in the ecology of smallmouth bass Micropterus dolomieu in north temperate lakes. The highest levels of mortality occur during the first year of life, and the habitat selected probably affects mortality. We used resource selection functions and abundance data from two northern...

Brown, Peter James; Bozek, Michael A.

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Year Published: 2010

Assessing effects of water abstraction on fish assemblages in Mediterranean streams

1. Water abstraction strongly affects streams in arid and semiarid ecosystems, particularly where there is a Mediterranean climate. Excessive abstraction reduces the availability of water for human uses downstream and impairs the capacity of streams to support native biota. 2. We investigated the flow regime and related variables in six river...

Benejam, Lluis; Angermeier, Paul L.; Munne, Antoni; García-Berthou, Emili

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Year Published: 2010

Evidence of panmixia between sympatric life history forms of coastal cutthroat trout in two lower Columbia River tributaries

Coastal cutthroat trout Oncorhynchus clarkii clarkii exhibit resident and migratory life history strategies that often occur sympatrically, but the relationship between these forms within a population is poorly characterized. Through use of passive integrated transponder technology, migratory and resident coastal cutthroat trout were...

Johnson, Jeffrey R.; Baumsteiger, Jason; Zydlewski, Joseph D.; Hudson, J. Michael; Ardren, William R.

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Year Published: 2010

Ecoregion and land-use influence invertebrate and detritus transport from headwater streams

Summary 1. Habitats are often connected by fluxes of energy and nutrients across their boundaries. For example, headwater streams are linked to surrounding riparian vegetation through invertebrate and leaf litter inputs, and there is evidence that consumers in downstream habitats are subsidised by resources flowing from headwater systems. However...

Binckley, Christopher A.; Wipfli, Mark S.; Medhurst, R. Bruce; Polivka, Karl; Hessburg, Paul F.; Salter, R. Brion; Kill, Joshua Y.

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Year Published: 2010

Effects of an exotic prey species on a native specialist: example of the snail kite

Despite acknowledging that exotic species can exhibit tremendous influence over native populations, few case studies have clearly demonstrated the effects of exotic prey species on native predators. We examined the effects of the recently introduced island apple snail (Pomacea insularum) on the foraging behavior and energetics of the endangered...

Cattau, Christopher E.; Martin, J.; Kitchens, Wiley M.
Cattau C. Effects of an exotic prey species on a native specialist: Example of the snail kite. Biological conservation. 2010;143:513-520.

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Year Published: 2010

Movement distances and habitat switching by female Mallards wintering in the Lower Mississippi Alluvial Valley

Mallard (Anus platyrhynchos) populations in the Lower Mississippi Alluvial Valley (hereafter, LMAV) comprise the largest concentration of wintering Mallards in North America. Radiotelemetry techniques were employed to assess movements by female Mallards during winters of 2004-2005 and 2005-2006; 467 paired (diurnal and nocturnal) observations on...

Afton, Alan D.; Davis, Bruce E.

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Year Published: 2010

Anchoring submersible ultrasonic receivers in river channels with stable substrate

We developed an anchoring system for submersible ultrasonic receivers (SURs) that we placed on the bottom of the riverine reaches of three main-stem reservoirs in the upper Tennessee River. Each anchor consisted of a steel tube (8.9 x 35.6 cm) welded vertically to a round plate of steel (5.1 x 40.6 cm). All seven SURs and their 57-kg anchors were...

Bettoli, Phillip William; Scholten, G.D.; Hubbs, D.
Bettoli, PW (Bettoli, Phillip W.)[ 1 ] ; Scholten, GD (Scholten, George D.)[ 2 ] ; Hubbs, DW (Hubbs, Don W.)[

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Year Published: 2010

Dispersal of smallmouth bass from a simulated tournament weigh-in site

Simulated smallmouth bass Micropterus dolomieu fishing tournaments were staged in Dale Hollow Lake, a 12,400-ha reservoir in Tennessee, between March 2004 and February 2005 to investigate posttournament dispersal. Smallmouth bass (n = 54) were captured with conventional hook-and-line tackle and artificial lures, placed in live wells, and subjected...

Kaintz, Melissa A.; Bettoli, Phillip William
Kaintz, MA (Kaintz, Melissa A.)[ 1 ] ; Bettoli, PW (Bettoli, Phillip W.)[ 1 ]

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Year Published: 2010

Habitat use by Least Bitterns in the Arkansas Delta

Least Bittern (Ixobrychus exilis) occupancy surveys were conducted in the Arkansas Delta, USA, during April-July 2005-2006 to determine the proportion of area occupied and relate occupancy to habitat characteristics. Previous large-scale surveys indicated few Least Bitterns were present in the Delta. During surveys at 190 sites, Least Bitterns...

Budd, Michael J.; Krementz, David G.
Budd M. Habitat use by Least Bitterns in the Arkansas Delta. Waterbirds (De Leon Springs, Fla.). 2010-06;33:140-147.

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Year Published: 2010

Disease limits populations: plague and black-tailed prairie dogs

Plague is an exotic vector-borne disease caused by the bacterium Yersinia pestis that causes mortality rates approaching 100% in black-tailed prairie dogs (Cynomys ludovicianus). We mapped the perimeter of the active portions of black-tailed prairie dog colonies annually between 1999 and 2005 at four prairie dog colony complexes in areas with a...

Cully, Jack F.; Johnson, T.; Collinge, S.K.; Ray, C.

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Year Published: 2010

Survival of shovelnose sturgeon after abdominally invasive endoscopic evaluation

The development of effective and minimally invasive techniques to determine gender and gonad developmental stage is particularly important in performing accurate fisheries assessments for use in conservation and restoration. The initial and latent survival of shovelnose sturgeon Scaphirhynchus platorynchus was assessed after exposure to...

Trested, D.G.; Goforth, Reuben R.; Kirk, J.P.; Isely, J.J.

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Year Published: 2010

Waterbird nest density and nest survival in rice fields of southwestern Louisiana

Rice fields in southwestern Louisiana provide breeding habitat for several waterbird species; however, little is known about nest density, nest survival and the importance of landscape context of rice fields in determining breeding activity. In 2004, 42 rice fields were searched for nests, and 40 were searched in 2005. Land uses surrounding rice...

Pierluissi, S.; King, Sammy L.; Kaller, Michael D.
Pierluissi S. Waterbird Nest Density and Nest Survival in Rice Fields of Southwestern Louisiana. Waterbirds (De Leon Springs, Fla.). 2010-09;33:323-330.