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Full-Text Articles in Life Sciences
Freshwater Mussels (Bivalvia: Margaritiferidae And Unionidae) Of The Buffalo River Drainage, Tennessee, Matthew Philip Reed
Freshwater Mussels (Bivalvia: Margaritiferidae And Unionidae) Of The Buffalo River Drainage, Tennessee, Matthew Philip Reed
Masters Theses
The Buffalo River in Tennessee once hosted a rich population of freshwater mussels. During the 1980s, monitoring efforts demonstrated evidence of drastic declines and extirpation of entire assemblages. Increases in municipal development in the headwater tributaries and agriculture in the main stem of the Buffalo River are suspected causes for mussel community declines throughout the river. In 2011, collection data documented evidence of recovery in the lower Buffalo River. The aims of this project were: 1) to update the status, distribution, and species composition of mussels in the Buffalo River and its major tributaries through qualitative sampling, and 2) to …
Habitat Selection And Partitioning Among Darters In Two Tributaries Of The Clinch River, And Stream Restoration Effects On Substrate Profile, Daniel James Walker
Habitat Selection And Partitioning Among Darters In Two Tributaries Of The Clinch River, And Stream Restoration Effects On Substrate Profile, Daniel James Walker
Masters Theses
The group of fish referred to as darters is extremely biodiverse. Often, several closely related species will inhabit the same areas of streams, and prior research has investigated how these species may be partitioning the resources in low-order streams in which they are sympatric. The habitat partitioning of darters in two streams in the Clinch River system, Coal and Cove Creeks, was investigated. The study sites were picked due to their involvement in both physical and biological stream restoration efforts within the last several years, including the collection, translocation, and reintroduction of rainbow darters (Etheostoma caeruleum) from reference sites in …
Microglia Respond To Both Permanent And Temporary Deaferentation In The Adult Zebrafish Olfactory Bulb, Amanda K. Mckenna
Microglia Respond To Both Permanent And Temporary Deaferentation In The Adult Zebrafish Olfactory Bulb, Amanda K. Mckenna
Masters Theses
The major goal of this study was to investigate a microglial response following deafferentation in the adult zebrafish, Danio rerio, olfactory bulb. Microglia were identified in the olfactory bulb using the 4c4 antibody and phagocytic-dependent labeling (DiA). Microglia responded to both methods of deafferentation namely, permanent (cautery) and temporary (Triton X- 100). On one and three days following both permanent and temporary deafferentation there was a significant increase in microglia in the treated olfactory bulb. At five and seven days after permanent and temporary deafferentation there was no longer a significant difference between the treated and untreated olfactory bulbs, …
Effects Of Dams On Fish And Macroinvertebrate Communities In The Vermilion River, Il, Ryan Patrick Hastings
Effects Of Dams On Fish And Macroinvertebrate Communities In The Vermilion River, Il, Ryan Patrick Hastings
Masters Theses
Dams are a main source of anthropogenic disturbances on river systems and can affect rivers in a variety of ways. Dams have the ability to change rivers from lotic to lentic habitats, affect sediment transportation, connectivity, water quality, linkages with wetlands and the quality of in-stream and riparian habitats. The Danville Dam was constructed in 1914 on the Vermilion River in Danville, Illinois and is becoming a safety hazard for human recreation on the Vermilion River, resulting in three deaths in the last 10 years. The Illinois Department of Natural Resources in conjunction with the city of Danville has proposed …
Habitat Associations Of Larval And Juvenile Fishes In A Large Unimpounded River, Sharon V. Rayford
Habitat Associations Of Larval And Juvenile Fishes In A Large Unimpounded River, Sharon V. Rayford
Masters Theses
Larval and juvenile life stages of fish are numerically the dominant component of fish populations. These early life stages experience high levels of mortality due, in part, to anthropogenic disturbances, but little is known about which habitats they utilize in large-rivers, as they are often difficult to sample and identify. My study examined the larval and juvenile fish assemblages in different habitats within the lower 322 km of the Wabash River. Fish were sampled with a conical-cylindrical ichthyoplankton net (larvae) and a DC-electrified mini-Missouri trawl (juveniles) between May and October 2013. Larval fish were collected every two weeks from mid-May …
Do Artificial Riffles Enhance Nutrient Retention In Restored Streams?, Adam Thomas Hughes
Do Artificial Riffles Enhance Nutrient Retention In Restored Streams?, Adam Thomas Hughes
Masters Theses
Kickapoo Creek, a tributary of the Embarrass River in Central Illinois, has undergone a stream restoration that included the construction of two artificial riffles. These structures were designed to slow flood waters, increase channel and substrate stability, and increase habitat heterogeneity in a stream impacted by erosion and sediment deposition. They may also provide stable substrates that affect the algal community, leading to shifts in algal community composition, increases in the biomass of primary producers, and subsequent increases in nutrient retention. I explored the effects of the restoration on instream nutrient retention by measuring and comparing phosphate uptake lengths, velocities, …
Effects Of Instream Habitat Restoration On Macroinvertebrate And Fish Communities In A Small Midwestern Stream, Manisha Pant
Effects Of Instream Habitat Restoration On Macroinvertebrate And Fish Communities In A Small Midwestern Stream, Manisha Pant
Masters Theses
Although millions of dollars are spent annually on stream habitat restoration, the biological responses to these restorations are rarely monitored. I assessed the impact of habitat enhancement on fish and macroinvertebrate abundance and diversity in a small Midwestern stream. Fish and macroinvertebrate communities were sampled annually in two restored and two unrestored sites beginning two years before and continuing four years after restoration. Habitat heterogeneity increased in the restored sites following the restoration, but there were no significant changes in most macroinvertebrate and fish community indices. Macroinvertebrate composition was significantly different between spring and fall, but in general, assemblages within …