Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Valerie A. Barko"'
Autor:
Valerie A. Barko, Ronald C. Brooks, David E. Ostendorf, Sara J. Tripp, David P. Herzog, James E. Garvey, Quinton E. Phelps, Joseph W. Ridings, Robert E. Colombo, Robert A. Hrabik
Publikováno v:
North American Journal of Fisheries Management. 29:1487-1495
We evaluated the efficacy of three gears commonly used to sample shovelnose sturgeon Scaphirhynchus platorynchus, pallid sturgeon S. albus, and lake sturgeon Acipenser fulvescens in large rivers. We stratified habitats and randomly sampled sites with
Publikováno v:
Journal of Freshwater Ecology. 24:103-108
Sampling has been conducted in small to large rivers of the Midwest and northeastern United States to determine the usefulness of a modified Missouri trawl designed to increase species detection of small-bodied fish species. We modified the Missouri
Publikováno v:
Chelonian Conservation and Biology. 7:205-212
Aquatic biologists throughout the United States use fyke nets to sample fish. Often, these nets have high turtle bycatch and mortality rates, especially when set in extreme environmental conditions. Because a previous study found increased turtle mor
Publikováno v:
Transactions of the Missouri Academy of Science. 41:7-13
Donaldson Point Conservation Area (DPCA) is a lentic area within the Mississippi River floodplain that experiences seasonal flooding because of direct connectivity to the Mississippi River. Sampling for aquatic turtles was conducted during fall (Octo
Autor:
Valerie A. Barko, Jeffrey T. Briggler
Publikováno v:
Chelonian Conservation and Biology. 5:225-231
By using 6 years of Long Term Resource Monitoring Program (LTRMP) turtle by-catch data collected from the middle Mississippi River, we investigated smooth softshell (Apalone mutica) and spiny softshell (Apalone spinifera) turtle abundance collected f
Publikováno v:
Wetlands. 26:244-257
We examined data collected on fish assemblage structure among three differing floodplain types (broad, moderate, and narrow) during the 1993 flood in the unimpounded reach of the upper Mississippi River. This 500 year flood event provided a unique op
Publikováno v:
Southeastern Naturalist. 4:261-272
We conducted a thorough survey of the Bogue Chitto River fish assem- blage from February 1996 to January 1997 to examine long-term trends in the assemblage by comparing our findings to surveys conducted in 1971-1974 and 1987-1988. The 1971-1974 surve
Publikováno v:
North American Journal of Fisheries Management. 25:594-603
We conducted a study from 1998 to 2001 to determine the efficacy of a benthic trawl designed to increase species detection and reduce the incidence of zero catches of small-bodied fishes. We modified a standard two-seam slingshot balloon trawl by cov
Publikováno v:
Journal of Wildlife Management. 68:1145-1150
We investigated variation of incidentally captured turtle mortality in response to environmental factors and passive fishing techniques. We used Long Term Resource Monitoring Program (LTRMP) data collected from 1996 to 2001 in the unimpounded upper M
Autor:
Valerie A. Barko, Robert A. Hrabik
Publikováno v:
The American Midland Naturalist. 151:265-273
Large rivers of the United States have been altered by construction and maintenance of navigation channels, which has resulted in habitat loss and degradation. Using 7 y of Long Term Resource Monitoring Program data collected from the unimpounded upp