Effects of food resources on fatty acid composition, growth and survival of freshwater mussels

Increased nutrient and sediment loading have caused observable changes in algal community composition, and thereby, altered the quality and quantity of food resources available to native freshwater mussels. Our objective was to characterize the relationship between nutrient conditions and mussel food quality and examine the effects on the fatty acid composition, growth and survival of juvenile mussels. Juvenile Lampsilis cardium and L. siliquoidea were deployed in cages for 28 d at four riverine and four lacustrine sites in the lower St. Croix River, Minnesota/Wisconsin, USA. Mussel foot tissue and food resources (four seston fractions and surficial sediment) were analyzed for quantitative fatty acid (FA) composition....

Categories: Data; Types: Citation; Tags: Mississippi River, Prescott, WI, St Croix Falls, WI, St Croix River, St Croix River, All tags... USGS Science Data Catalog (SDC), fatty acid composition, food resources, freshwater mussels, nutrients, sediment, survival and growth, Fewer tags

Age, habitat, and yearly variation in the diet of a generalist insectivore, the southwestern willow flycatcher

Characterizing avian diet is complex, especially for generalist insectivores, as food resources can vary over space and time, and individuals of different sexes and ages may consume different food. We examined diet of a generalist insectivore, the Southwestern Willow Flycatcher (Empidonax traillii extimus), at Roosevelt Lake in central Arizona from 2000 to 2004, determined from 344 fecal samples. We found that five prey categories accounted for 70% of the proportional abundance in flycatcher diet: Hymenoptera, Diptera, Cicadellidae, Coleoptera, and Formicidae, although the relative amounts of these and other taxa differed significantly among years. We detected no differences in diet between sexes of adults, but...

Categories: Publication; Types: Citation, Journal Citation; Tags: Empidonax traillii extimus, Tamarix, The Condor, annual variation, endangered species, All tags... food resources, riparian, Fewer tags

Carbon and nitrogen isotopic values from three omnivorous turtles, vegetation, and potential prey resources in the Santa Fe River, Florida sampled 2019-2020

All samples were collected within a 9km stretch of the Santa Fe River in northern Florida, USA. In 2019 and 2020 we sampled claw tissue from Macrochelys suwanniensis, Chelydra serpentina, and Trachemys scripta scripta, from three different sampling locations. We collected Vegetation and potential prey tissue samples within close proximity of turtle captures from two of the three capture locations. All tissues were used for stable carbon and nitrogen isotope analysis.

Categories: Data; Tags: Ecology, Florida, Lower Suwannee, USGS Science Data Catalog (SDC), Wildlife Biology, All tags... Wildlife Biology, biological resources, biota, carbon isotope analysis, food resources, food web, light stable isotope analysis, stable isotope analysis, wetland ecosystems, Fewer tags

Microsatellite genotypes for Lake Sturgeon (Acipenser fulvescens) Eggs and Larvae from Constructed Reefs in the St. Clair-Detroit River System (2015-2016)

This dataset contains the physical collection information (e.g., sample location, date, gear type) and microsatellite DNA genotype of egg and larval Lake Sturgeon collected in the St. Clair and Detroit rivers in 2015 and 2016. Individuals were genotyped for 18 microsatellite loci (13 disomic and 5 polysomic). Alleles (base pair sizes) were recorded as presence absence scores (1:present, 2:absent, 0:missing data) for all previously observed alleles. Thus individual genotypes were recorded as pseudo diploid dominant phenotypes resulting in individual vectors of length n=205 for each genotyped egg or larval individual.

Categories: Data; Tags: Acipenser, Acipenser fulvescens, Acipenseridae, Anthropogenic, Anthropogenic Rock, All tags... Anthropogenic Rock Reef Substrate, Anthropogenic Rock Rubble, Anthropogenic Substrate, Aquatic Biology, Aquatic Setting, Artificial reef, Assessments, Biological Occurrence, Data Content Subjects, Data Content Types, Detroit, Detroit River, Dredge Deposit, Dredge Disturbance, Dredged/Excavated Channel, Fishes, Fishing from Shore, Fishing with Benthic Mobile Gear, Genetics, Grassy Island, Great Lakes, Habitat, Harvesting Living Resources, Huron, Lacustrine, Lake Saint Clair, Lake St. Clair, Living Resources, Macomb, Michigan, Middle Channel Saint Clair River, Motorized Boating, North Channel Saint Clair River, Pelagic Fishing, Port Huron, Recreational Nonextractive /Cultural Use, Sailing, Saint Clair, Saint Clair River, Shipping, Shore Use, St. Clair, St. Clair-Detroit, Substrate, Transportation, USGS Science Data Catalog (SDC), United States, Wayne, Western Lake Erie, animals, anthropogenic agents of coastal change, aquatic ecosystems, biological features, biological laboratory methods, biological observations, biological resources, biology, biota, biota, canal, capturing (animals), channels, chordates, conservation, construction, cultural resources, data processing, datasets, discipline, dredge spoils disposal, dredging operations, ecological change, ecosystem monitoring, ecosystem restoration, ecosystems, endemic species, environment, environmental assessment, eukaryotes, feature type, field inventory and monitoring, field methods, field observation, field sampling, fish, fish eggs, fish larvae, fisheries, fishery resources, food resources, freshwater ecosystems, genetic diversity, genetics, genotype, habitats, hot topics, hydrographic features, ichthyology, ichthyoplankton, inland fishery resources, inlandWaters, laboratory methods, landform, life sciences, management methods, methods, native species, natural resources, nekton and plankton, organism groupings (non-taxonomic), organisms, physiographic features, population and community ecology, population dynamics, product types, ray-finned fish ["bony fish"], recreational fishery resources, reef, reefs, regions, research method, resource management, resources, river, river basin development, river systems, rivers, sciences, shipping channels, species conservation, streams, sturgeon, topics, transportation resources, trapping, vertebrates, water resources, wetland destruction, zoology, Fewer tags