Research Wildlife Biologist
Western Ecological Research Center
Email:
jackerman@usgs.gov
Office Phone:
530-669-5087
Fax:
530-669-5060
ORCID:
0000-0002-3074-8322
Location
800 Business Park Dr
800 Business Park Drive
Dixon
, CA
95620
US
Supervisor:
Tom S Kimball
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These data include a row for each duck nest equipped with a small video camera. We present the location of the nest, the timing of the start of hatch, the timing of the end of hatch, and the timing of the departure of the hen and ducklings from the nest. Additionally, this table includes any predators that were observed at the nest depredating eggs prior to hatch and any predators that were observed at the nest between hatch and departure from the nest. These data support the following publication: "Sitting ducklings: Timing of hatch, nest departure, and predation risk for dabbling duck broods" by Sarah H. Peterson, Joshua T. Ackerman, Mark P. Herzog, C. Alex Hartman, Rebecca Croston, Cliff L. Feldheim, and Michael...
Categories: Data;
Tags: Grizzly Island Wildlife Area,
Mareca strepera,
Suisun Marsh,
USGS Science Data Catalog (SDC),
Wildlife Biology, All tags...
biota,
imprinting,
nest depredation,
nest exodus,
predation,
waterfowl, Fewer tags
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San Francisco Bay, California is considered a mercury-impaired watershed. Elevated concentrations of mercury are found in water and sediment as well as fish and estuarine birds. Sources of mercury to the watershed since 1845 include sediment-associated mercury from mercury mining, mercury losses from gold amalgamation activities in mines of the Sierra Nevada, aerial deposition of mercury from global and regional emissions to air, and the direct discharge of mercury to Bay waters associated with the urbanization and industrialization of the estuary. We assessed historical trends in mercury bioaccumulation by measuring mercury concentrations in feathers of the endangered California Ridgway’s rail (formerly California...
Categories: Data;
Tags: California Ridgway's Rail,
Feathers,
Ice Cores,
Lake Tahoe,
Mercury, All tags...
San Francisco Bay,
Sediment,
Structural Equation Model,
USGS Science Data Catalog (SDC),
Wyoming, Fewer tags
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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...
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We used free-ranging northern elephant seals as a model species to investigate maternal transfer of mercury (Hg) to pups in relation to maternal traits, including maternal blood mercury concentrations, and to quantify the links between pup lanugo mercury concentrations and maternal mesopelagic foraging behavior during gestation. We satellite tracked known-age adult females at sea during their seven-month-long foraging trip to determine maternal foraging strategies (geographic locations and diving depths) and quantified mercury concentrations in maternal blood and their pups’ blood and lanugo (which is defined as pup hair grown in utero) early in lactation when seals were hauled out. We then tested how the maternal...
Categories: Data;
Tags: Ecology,
Environmental Health,
Marine Oceanic Mesopelagic Layer,
USGS Science Data Catalog (SDC),
Wildlife Biology, All tags...
bioaccumulation,
biota,
contaminant transport,
ecology,
ecotoxicology,
mercury,
mercury contamination,
seals, sea lions and walruses, Fewer tags
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This dataset contains mercury concentrations and locations of wintering red-legged kittiwakes in the western subartic Pacific Ocean. These data support the following publication: Fleishman, AB, RA Orben, N Kokubun, A Will, R Paredes, JT Ackerman, A Takahashi, AS Kitaysky, and SA Shaffer. 2019. Wintering in the Western Subarctic Pacific increases mercury contamination of red-legged kittiwakes. Environmental Science and Technology, in press.
Categories: Data;
Tags: Pacific Ocean,
USGS Science Data Catalog (SDC),
Wildlife Biology,
biogeography,
biota, All tags...
birds,
contaminant exposure,
distribution,
hierarchical clustering,
isotopic analysis,
marine isoscape,
mercury contamination,
mesopelagic predator,
migration (organisms),
non-breading,
seabird,
seabird sentinels,
stable isotopes,
western subartic, Fewer tags
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