Mine-waste pollution of Bear Butte Creek, Black Hills, South Dakota

Effluents leaving the Gilt Edge Mining properties in the Black Hills near Deadwood, South Dakota, were collected during April 1940. Field studies of these effluents and of the streams receiving them were made at the time and subsequently laboratory assays and analyses have been completed. ... Data from this particular case of mine waste pollution are presented here.

Central Area Fisheries Advisory Committee 30th March, 1983

This is the report from the Central Area Fisheries Advisory Committee meeting, which was held on the 30th March, 1983. The report contains sections on Fyke nets and otters, Whirling disease, the decline of Salmon and Sea Trout Catches in Furness and South Cumbria Fisheries Association, spawning tributaries, Langcliffe hatchery, and fisheries activities. The section on Fisheries Activities is reported by the area fisheries officer and includes river conditions and fishing, migratory fish movement, Hatcheries (Middleton hatchery, salmon cages in Dalton and Furness, salmon and sea trout), stocking, fish disease, poaching, management work and prosecutions. The Fisheries Advisory Committee was part of the Regional Water Authorities, in this case the North West Water Authority. This preceded the Environment Agency which came into existence in 1996.

The effects of urbanization on populations of grass shrimp Palaemonetes spp. in small, high salinity estuaries

High salinity estuaries in the southeastern U.S. have experienced increased inputs of contaminants from nonpoint source (NPS) urban runoff and decreases in habitat due to filling of wetlands and dock/bulkhead construction. Urbanization may pose significant risks to estuarine fauna, particularly crustaceans. The grass shrimp of the genus Palaemonetes, is one of the dominant species found in estuarine tidal creeks, accounting for greater than 50% of all macropelagic fauna on an annual basis. Spatial analytical and geographic information system techniques were used to determine which factors influenced the Palaemonetes population structures in a South Carolina bar-built estuary surrounded by urban development. Impacts from land use practices were investigated using concentric circular buffers around study sites. Factors investigated included sediment-associated polycyclic aromatic hydrocarbons concentration, land use classification, percent impervious surfaces, and other selected urban factors. Geographic information system and statistical modeling showed quantitative relationships between land use class and impacts on Palaemonetes density. The study suggests that habitat loss is a major factor influencing grass shrimp densities. Multiple regression modeling suggests a significant relationship between habitat alterations and Palaemonetes densities.