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A laboratory study was conducted at the Northern Appalachian Research Laboratory (Wellsboro, PA) on the ability to manipulate photoperiod and water temperatures to determine its effects on Eastern elliptio freshwater mussel glochidia production. Brooding mussels were collected from Pine Creek, Tioga County, PA in late December and were housed in the laboratory in groups subjected to one of four environmental treatments: natural temperature and photoperiod, 6 week delay in natural conditions, 12 week delay in natural conditions, and natural temperature and photoperiod with a winter low of 10°C. In this study, "natural" conditions refer to light and temperature conditions that mimic what mussels would have been exposed...
Datasets describe the outcomes of transporting Yellow Perch and Nile Tilapia at high densities under AQUI-S®20E (10% eugenol). Specifically, data describe the survival, morphometric measurements, behavior/sedation, sedative concentrations, and water chemistry for each species during live transport. There are 5 csv files associated with this study
This dataset includes data collected to determine the effects of formaldehyde on nitrification processes in biofilters of recirculating aquaculture systems (RAS) from two field trials. Biofilter nitrification was monitored by measuring the levels of total ammonia nitrogen, nitrite, and nitrate in experimental aquaria containing a small biofilter before and after formaldehyde was applied to the test system.
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The U.S. Geological Survey (USGS) developed a spatial water-quality model called SPAtially Referenced Regressions On Watershed attributes (SPARROW) to estimate the major sources and environmental factors that affect the long-term supply, transport, and fate of contaminants in the Nation’s streams. The SPARROW model relates in-stream water-quality data to spatially referenced characteristics of watersheds, including contaminant sources and factors influencing terrestrial and aquatic transport. Based on SPARROW modeling, one of the main nutrient sources to streams is point-source facilities such as municipal waste-water treatment plants that discharge directly to streams. This dataset was developed to assist with...
Categories: Data; Tags: Alabama, Arizona, Arkansas, California, Colorado, All tags...
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This dataset contains water-use estimates for 2015 that are aggregated to the county level in the United States. The U.S. Geological Survey's (USGS's) National Water Use Science Project is responsible for compiling and disseminating the Nation's water-use data. Working in cooperation with local, State, and Federal agencies, the USGS has published an estimate of water use in the United States every 5 years, beginning in 1950. Water-use estimates aggregated to the State level are presented in USGS Circular 1441, "Estimated Use of Water in the United States in 2015" (Dieter and others, 2018). This dataset contains the county-level water-use data that support the state-level estimates in Dieter and others 2018. This...


    map background search result map search result map Estimated Use of Water in the United States County-Level Data for 2015 Point-Source Nutrient Loads to Streams of the Conterminous United States, 2012 Laboratory study investigating the effects of seasonal temperature and photoperiod manipulation on Eastern elliptio reproduction Survival and growth of juvenile freshwater mussels in a flow-through auto-feeding system Laboratory study investigating the effects of seasonal temperature and photoperiod manipulation on Eastern elliptio reproduction Survival and growth of juvenile freshwater mussels in a flow-through auto-feeding system Point-Source Nutrient Loads to Streams of the Conterminous United States, 2012 Estimated Use of Water in the United States County-Level Data for 2015