This data set contains toxicity data from 28- and 84-day sediment bioassays to assess the effects of contaminated Kanawha River, West Virginia sediment on juvenile mussels (fatmucket, Lampsilis siliquoidea) and one commonly tested benthic invertebrate (amphipod, Hyalella azteca) following ASTM standard methods for conducting 4-week sediment toxicity tests with the mussel and amphipod. In addition, a longer-term (12-week) sediment test with the mussel was conducted to determine toxic effects in a potentially more sensitive bioassay with a longer test duration. A 28-day sediment dilution bioassay of test site 2 from the initial sediment exposures was also conducted to further evaluate the toxicity.

This data set contains toxicity data from short term 7-day chronic water-only bioassays to assess the effects pH on ammonia toxicity to survival and growth of a juvenile fatmucket mussel (Lampsilis siliquoidea). We conducted 4 concurrent exposures at nominal pHs of 7.0, 7.5, 8.0, and 8.5 with varying ranges of ammonia to capture effect concentrations. This data set has three tables: (1) routine water quality, including measured pH and ammonia (2) survival and dry weight of juvenile mussels, and (3) length measurements of juvenile mussels

This data set includes mortality data from acute toxicity tests with juveniles of the mussel, Lampsilis siliquoidea exposed to 6PPD and 6PPDQ. Concurrently collected analytical chemistry and general water quality measurements are included.

The Hudson River, New York, was contaminated with polychlorinated biphenyls (PCBs) from two General Electric plants over a period of ~30 years and PCBs are still present in sediment and biota today. The river provides habitat for a variety of plants and animals, including native freshwater mussels. Although little is known about mussels in this river, managers were concerned that a 7-year remediation program to remove PCB-contaminated sediments could affect mussels. From 2013-2019, we conducted stratified (non-remediated, before remediation, after remediation) quantitative surveys across 17-pool-stratum combinations across nine pools. Sampling was done during August through October of each year. At each site, divers excavated sediment from two 0.063 square meter quadrats on the riverbed. Divers excavated substrates to a depth of about 15 centimeters and placed material from both quadrats into a 6-millimeter mesh bag. Mussels were sorted from the sediments, identified to species, aged by counting external annuli, and measured for shell length. These data were used to generate estimates of species composition, density, size, structure, and ecosystem services of mussel assemblages pre- and post-remediation.

The Hudson River, New York, was contaminated with polychlorinated biphenyls (PCBs) from two General Electric plants over a period of ~30 years and PCBs are still present in sediment and biota today. The river provides habitat for a variety of plants and animals, including native freshwater mussels. Although little is known about mussels in this river, managers were concerned that a 7-year remediation program to remove PCB-contaminated sediments could affect mussels. From 2013-2019, we conducted stratified (non-remediated, before remediation, after remediation) quantitative surveys across 17-pool-stratum combinations across nine pools. Sampling was done during August through October of each year. At each site, divers excavated sediment from two 0.063 square meter quadrats on the riverbed. Divers excavated substrates to a depth of about 15 centimeters and placed material from both quadrats into a 6-millimeter mesh bag. Mussels were sorted from the sediments, identified to species, aged by counting external annuli, and measured for shell length. These data were used to generate estimates of species composition, density, size, structure, and ecosystem services of mussel assemblages pre- and post-remediation.

The data release includes data from four studies: (1) toxicity of a permitted effluent, which entered the Deep Fork River (DFR), Oklahoma, USA, to a unionid mussel (Lampsilis siliquoidea) and to 2 standard test species (cladoceran Ceriodaphnia dubia; and fathead minnow Pimephales promelas) in short-term 7-d effluent tests; (2) relative sensitivities of the 3 species to potassium (K), an elevated major ion in the effluent, using 7-d toxicity tests with KCl spiked into a DFR upstream reference water; (3) potential influences of background water characteristics on the acute K toxicity to the mussel (96-h exposures) and cladoceran (48-h exposure) in 4 reconstituted waters that mimicked the hardness and ionic composition ranges of the DFR; and (4) potential influence of temperature on acute K toxicity to the mussel. Water quality, survival, growth, and reproduction endpoints are reported.

The data release includes data from four studies: (1) toxicity of a permitted effluent, which entered the Deep Fork River (DFR), Oklahoma, USA, to a unionid mussel (Lampsilis siliquoidea) and to 2 standard test species (cladoceran Ceriodaphnia dubia; and fathead minnow Pimephales promelas) in short-term 7-d effluent tests; (2) relative sensitivities of the 3 species to potassium (K), an elevated major ion in the effluent, using 7-d toxicity tests with KCl spiked into a DFR upstream reference water; (3) potential influences of background water characteristics on the acute K toxicity to the mussel (96-h exposures) and cladoceran (48-h exposure) in 4 reconstituted waters that mimicked the hardness and ionic composition ranges of the DFR; and (4) potential influence of temperature on acute K toxicity to the mussel. Water quality, survival, growth, and reproduction endpoints are reported.

We conducted multiple toxicity tests to (1) evaluate the survival and growth of juvenile mussels (Fatmucket, Lampsilis siliquoidea) in a standard 4-week and a longer-term 12-week exposures following a method refined from the standard method using two common reference toxicants (potassium chloride [KCl] and nickel [Ni]); (2) evaluate reproductive endpoints from reproductive KCl and Ni toxicity tests. Reproductive toxicity tests started with Fatmucket brooding mature glochidia to five concentrations of K and Ni for 6 weeks. Subsamples of glochidia were then removed from the adults to determine (1) the viability of brooded glochidia; (2) the viability of free glochidia in a 24-h additional exposure; and (3) success of glochidia parasitism. In this data release we report individual biological, chemical, and water quality measurements from each toxicity test.

We conducted multiple toxicity tests to (1) evaluate the survival and growth of juvenile mussels (Fatmucket, Lampsilis siliquoidea) in a standard 4-week and a longer-term 12-week exposures following a method refined from the standard method using two common reference toxicants (potassium chloride [KCl] and nickel [Ni]); (2) evaluate reproductive endpoints from reproductive KCl and Ni toxicity tests. Reproductive toxicity tests started with Fatmucket brooding mature glochidia to five concentrations of K and Ni for 6 weeks. Subsamples of glochidia were then removed from the adults to determine (1) the viability of brooded glochidia; (2) the viability of free glochidia in a 24-h additional exposure; and (3) success of glochidia parasitism. In this data release we report individual biological, chemical, and water quality measurements from each toxicity test.

Here we present the data collected during a mark-recapture study on freshwater mussels in Bruce Creek, Walton County, Florida. These data were used to evaluate the non-lethal impacts of a gill sampling protocol to assess gravidity of freshwater mussels. Data were collected every four weeks, or as weather permitted, to be able to monitor the reproductive status of each mussel every month of the year. The dataset includes unique tag numbers to identify specific female mussels captured and recaptured during this study. Genus and species were identified, and the gravidity status was evaluated for each individual mussel.