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Zebra and quagga mussel veligers were exposed to eleven distinct cultures (isolates) of cyanobacteria representing Anabaena, Aphanizomenon, Dolichospermum, Microcystis, and Planktothrix species and the cyanotoxin microcystin to determine the lethality of cyanobacteria on dreissenid veligers. Six-day laboratory bioassays were performed in microplates using dreissenid veligers collected from the Detroit River, Michigan, USA. Veligers were exposed to increasing concentrations of cyanobacteria and microcystin using the green algae Chlorella minutissima as a control. Raw data were fit to dose response curves formulated from a Probit model to calculate LC50 values. This data release presents the raw data summarized and...
This dataset documents the number of normally developed hatched free embryos, abnormally developed hatched free embryos, and viable unhatched embryos from two laboratory trials (shovelnose sturgeon during April and pallid sturgeon during May 2016) in substrate conditions designed to simulate potential fates within a dynamic riverine environment. Trials were performed with substrate treatments that consisted of clean glass (control), gravel, medium-coarse sand, and fine sand-silt. Medium-coarse sand and fine sand-silt substrates were each tested three ways: unburied, partially buried, and fully buried (1–2 millimeter depth). Pallid sturgeon and shovelnose sturgeon embryos were exposed to trial conditions from the...
Eggshell thickness was measured at the egg equator and sharp pole for 5 songbird species. Each egg has thickness measurements at two locations on the egg and the corresponding egg length, egg width, egg volume, relative incubation age, egg identification, and nest identification. These data support the following publication: Schacter, C.R., Peterson, S.H., Hartman, C.A., Herzog, M.P., and Ackerman, J.T., 2024. Eggshell thickness and egg morphometrics in five songbird species from the Central Valley, California. Journal of Field Ornithology, 95(1), p.3. https://doi.org/10.5751/JFO-00410-950103.
Categories: Data;
Tags: Ecology,
USGS Science Data Catalog (SDC),
biota,
birds,
developmental biology
We conducted a lab study to explore eDNA shedding during early life history (from fertilized eggs until near yolk sac absorption) in Chinook Salmon at three biomasses: 10 eggs, 100 eggs, and 1,000 eggs, and each egg biomass was replicated (indicated as replicates 1 and 2). Water samples were collected at several time points before, during, and after hatch for detection of Chinook Salmon DNA. On days when water samples were collected, we counted the number of dead eggs and the number of viable eggs hatched (identified as larvae emerged from eggs) until hatching was completed. The dataset represents the results from testing water samples for Chinook Salmon DNA using a quantitative polymerase chain reaction (qPCR)...
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