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Showing 1 to 20 of 23 for “"Backwaters"”.
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Fish-Habitat Associations in Small Backwaters of the Upper Missouri River, North Dakota
… and fish assemblages associated with small backwaters of the Upper Missouri River, North Dakota. Backwaters sampled ranged in size from 0.002 to 0.44 ha with a mean area of 0.08 ha and were located relatively close to the main channel of the Missouri River (mean = 48 m from river's edge). …
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Zooplankton response to Asian carp harvesting in Illinois River backwaters: a natural experiment
… nauplii, copepods, and cladocerans in ten backwaters receiving three levels of harvest in late summer of 2015. Analysis indicates that both harvest level and month affect zooplankton, but that there was no interaction. Rotifer densities increased at low (951 kg/km2 month-1) and high (8229 …
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Water Quality Aspects of an Intermittent Stream and Backwaters in an Urban North Texas Watershed
… influence on water quality of the stream and backwaters. Water quality monitoring of Pecan Creek demonstrated that dissolved oxygen standards for the protection of aquatic life were being achieved. Water quality modeling of Pecan Creek was completed to assess future increases in effluent flow …
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Seasonal Investigation of Native Fishes and Their Habitats in Missouri River and Yellowstone River Backwaters
… and impoundment. Ecologists have assumed that backwaters are a critical habitat component for certain life stages of native fishes; however, documented relationships are limited. During this study, I monitored fishes, invertebrates, and habitats to help determine the importance of backwaters to …
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Larval fish abundance and habitat associations in backwaters and main channel borders of the Kanawha River
… the emerald shiner larvae appeared in the backwaters. This increase in numbers could be due to movement, differential mortality, or higher growth rates. Other cyprinids (excluding emerald shiners and carp) were equally abundant in both backwater and main channel areas. These other cyprinid …
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Effects of Hydrologic Connection on Physicochemical Conditions and Algal Properties in Backwaters of the Lower Mississippi River
… As the river elevation declined, the backwaters became partly or fully disconnected from the river, resulting in an increase in light as suspended sediments settled out of the water column. Following this decline in turbidity, there was a rapid increase in phytoplankton biomass, and a …
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Geochemical Controls on Mercury Methylation in Backwaters of a Gulf Coastal Plain River System, Implications for Water Column Processes
… for mercury methylation in the water column of backwaters off of the main channel. Results showed that filtered methyl mercury was positively correlated to dissolved organic carbon (r2=0.76) for water samples taken from the bottom 1 ft of the water column at three sites, suggesting the …
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The Effect of Turbidity on the Distribution and Life History of River Zooplankton
… 12 sites in the Illinois River and associated backwaters and wetlands to determine community composition and environmental variables. Rotifers were the most widespread and abundant, copepods were most abundant in backwater lakes, and cladocerans were most abundant in the non-connected lake …
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Zooplankton, Macroinvertebrate, Herpetile, and Ichthyofaunal Biodiversity of Riverine Habitat on the Upper Missouri River
… was condicted in seven macrohabitat types: backwaters, side channels, main channel borders, main channels, sandbar complexes, tributary confluences, and vegetated islands. Zooplankton sampling consisted of replicate vertical tows with a plankton net. Macroinvertebrate sampling included a …
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A Change in Fish Assemblages in the Pascagoula River, MS
… nuchalis </em>can withstand pools and backwaters that are lower in DO and might do better in more extreme conditions, while <em>C. venusta</em> is unable to tolerate the harsher environments.</p>
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The ownership of goods and cultures of consumption in Ludlow, Hereford and Tewkesbury, 1660-1760
… and circumstances led to them being viewed as backwaters, and this may have influenced consumption practices. Ludlow had lost its importance as the Capital of Wales; it stagnated until its fortunes began to be revived by achieving leisure town status. Hereford was a cathedral city and a county …
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Impact of water wheel hydrokinetic unit spacing on hydraulic conditions in a rectangular canal under mild slope subcritical flow with physical modeling
… control structure was necessary. Although the backwaters overlap, more power was available when two units were installed compared to one. The reduction of canal freeboard by the stacked backwater is the most significant constraint. Further tests may assess the units’ power efficiency, flow …
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The Little People of Pea Ridge
… the Peytonsburg Post Office and extending to the backwaters of the lake. (Appendix one on page sixty-nine contains a map of this section of Pea Ridge.) The purpose of this study is to document the unusually rich folk culture of this small community and to discuss the reasons for the tenacity with …
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Determinants of Growth and Survival of Larval Pallid Sturgeon: A Combined Laboratory and Field Approach
… types in the Lewis and Clark Delta (i.e., backwaters, side channels, main channel depositional zones, and Lewis and Clark Lake headwater habitats) regarding their suitability as nurseries for pallid sturgeon and strived to identify variables that foster growth and condition (i.e., energy …
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THE LIFE HISTORY AND ECOLOGY OF RIVERINE SOCKEYE SALMON (ONCORHYNCHUS NERKA) IN A LARGE FLOODPLAIN RIVER
… reared in spring brooks, beaver ponds, and backwaters of the river flood plain and that these habitats types made up over 70% of the available off-channel habitat. The average density of floodplain rearing juveniles in the fall was between .02 to .54 fish „ª m-2 and a total of 165, 711 …
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THE LIFE HISTORY AND ECOLOGY OF RIVERINE SOCKEYE SALMON (ONCORHYNCHUS NERKA) IN A LARGE FLOODPLAIN RIVER
… reared in spring brooks, beaver ponds, and backwaters of the river flood plain and that these habitats types made up over 70% of the available off-channel habitat. The average density of floodplain rearing juveniles in the fall was between .02 to .54 fish „ª m-2 and a total of 165, 711 …
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Behavioral and Hormonal Flexibility Across Light Environments in Guppies (Poecilia reticulata)
… still pools in swift-flowing streams, and the backwaters of small rivers in mountain forest areas of Trinidad (Houde 1997; Magurran 2005). In this study I attempted to answer the following questions using three low predation populations of guppies : 1) Do guppies display a behavioral syndrome …
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Habitat Selection and Movement of Pallid Sturgeon in Lake Sharpe, South Dakota
… (4.6 ± 0.08 m). They were not found in either backwaters or in submerged trees of former islands or riparian areas. Sixty-four percent of locations were in bottom water current velocities between 0.1 and 30 cm/s (25.7 ± 1.4 cm/s). Bottom water turbidity averaged 95.2 ± 5.3 NTU's where fish were …
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Multi-scale patterns of habitat use by Roanoke logperch (Percina rex) in Virginia rivers: a comparison among populations and life stages
… logperch were found in shallow, stagnant backwaters and secondary channels. In the Nottoway River, both adult and subadult logperch were found over sand and gravel in deep, low velocity pools and runs. Subadults were observed in slightly more silted, lower velocity habitat. Younger age …
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