Skip to main content
Advanced Search

Filters: Tags: {"type":"Place","name":"california"} (X) > partyWithName: Josh T Ackerman (X)

7 results (142ms)   

View Results as: JSON ATOM CSV
thumbnail
This dataset describes mesopredator locations (raccoons and striped skunks), dabbling duck nest locations (mallard, gadwall, and cinnamon teal), northern harrier nest locations, and random locations in relation to a set of habitat features in Suisun Marsh, California during 2016 through 2019. We designed a series of questions to link fine-scale predator movements and vulnerability of dabbling duck nests to predator encounters and egg predation. We conducted our study over a 4-year period using 41 GPS-collared raccoons and striped skunks, two of the most widespread mammalian predators of waterfowl eggs in North America, and more than 2000 monitored duck nests. Each night of movement for mesopredators contains the...
thumbnail
This dataset describes nocturnal incubation recess behavior for mallard and gadwall hens nesting in Grizzly Island Wildlife Area in breeding seasons 2015-2018. It includes the frequency, start time and duration of recesses, and details a method for determining whether a recess was initiated in response to a predator at the nest using nest temperature data. These data support the following publication: Croston, R.L., Peterson, S.E., Hartman, C.A., Herzog, M.P., Feldheim, C.L., Casazza, M.L., Ackerman, J.T., 2021. Nocturnal incubation recess and flushing behavior by duck hens. Ecology and Evolution
thumbnail
The dataset includes the bird species, sex, mercury concentration in breast feathers and whole blood, and the composite measure of fluctuating asymmetry. Statistical models were developed for each species to analyze the relationship between mercury exposure in either breast feathers or whole blood and the composite measure of fluctuating asymmetry, while accounting for the sex of each bird.
thumbnail
Eggshell thickness was measured at the egg equator and poles (sharp pole and blunt pole) for 12 avian species. Eggshell thickness was related to egg morphometrics (egg length and width), embryonic development, egg status, and mercury contamination. Individual eggshells each have up to 3 thickness measurements, linked by the eggshell identification. Each measurement has the corresponding egg length, egg width, egg status, mercury concentration, and nest identification. Additionally, eggshell thickness was measured at 5 equally spaced positions along the longitude of the egg (sharp pole, quarter egg, half egg, three quarter egg, and blunt pole) in a subset of Forster's tern (Sterna forsteri) eggs. These data support...
thumbnail
This dataset includes field measurements and laboratory analyses of surface water, bottom water (sediment-water interface), surficial (0-2 cm) sediment, pore water (0-2 cm), and biota collected in Lake Combie, California, from September 2017 through August 2021. The study area includes six sites within the reservoir where discrete samples of surface water, bottom water, sediment, and pore water were taken along the length of the reservoir at the following distances from the spillway: 0.07 miles, 0.5 miles, 0.9 miles, 1.2 miles, 1.3 miles, and 1.4 miles. The within-reservoir sites were sampled during September 2017, February 2018, and May 2018, prior to a large sediment removal operation, and again during September...
thumbnail
Total mercury concentrations were determined in hair and whole blood of raccoons and skunks in Suisun Marsh from 2016 to 2019. Individual skunks and raccoons were identified by a unique identifier (Animal_ID) and some animals were sampled multiple times. This dataset includes animal sex, age class, the date the sample was collected, animal body mass, head length, and head-to-torso length. These data support the following publication: Peterson, Sarah H., Ackerman, J.T., Hartman, C.A., Casazza, M.L., Feldheim, C.L., and Herzog, M.P. 2020. Mercury exposure in mammalian mesopredators inhabiting a brackish marsh. Environmental Pollution
thumbnail
These data, which support a USGS authored manuscript, describe how active and previous previous infection with avian influenza impacts the movement ecology of several wild waterfowl species that overwinter in California. Results varied by species and demonstrate that the relationships between avian influenza infection and wild bird movements are context- and species-dependent.
    map background search result map search result map Fluctuating Asymmetry in Waterbirds in Relation to Mercury Exposure Avian Eggshell Thickness for 12 Species in the Western U.S. from 2014 to 2018 Hair and blood total mercury concentrations in raccoons and striped skunks from Suisun Marsh 2016 to 2019 Geochemical data for water, sediment, and biota in Lake Combie, California, 2017-2021 Nocturnal Incubation Recess and Flushing Behavior by Duck Hens Nesting in Grizzly Island Wildlife Area 2015-2018 Predator Movements and Duck Nests in Relation to Habitat Features in Suisun Marsh, CA (2016-2019) Data describing infection status and movement ecology of North American waterfowl Geochemical data for water, sediment, and biota in Lake Combie, California, 2017-2021 Hair and blood total mercury concentrations in raccoons and striped skunks from Suisun Marsh 2016 to 2019 Nocturnal Incubation Recess and Flushing Behavior by Duck Hens Nesting in Grizzly Island Wildlife Area 2015-2018 Predator Movements and Duck Nests in Relation to Habitat Features in Suisun Marsh, CA (2016-2019) Fluctuating Asymmetry in Waterbirds in Relation to Mercury Exposure Avian Eggshell Thickness for 12 Species in the Western U.S. from 2014 to 2018 Data describing infection status and movement ecology of North American waterfowl