Biologist
Western Ecological Research Center
Email:
jtomoleoni@usgs.gov
Office Phone:
831-460-7447
Fax:
831-459-2249
ORCID:
0000-0001-6980-251X
Location
2885 Mission St Occupancy Agreement # Aca12594
400 Natural Bridges Drive
Santa Cruz
, CA
95060
US
Supervisor:
Julie L Yee
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These data are .csv files of tagged sea otter re-sighting locations (henceforth, resights) collected in the field using a combination of VHF radio telemetry and direct observation using high powered (80x) telescopes. Sea otters were tracked by shore or boat-based observers from the date of tagging until the time of radio battery failure, the animal’s death, or the end of the project, whichever comes first. The frequency of re-sighting was opportunistic, depending on logistical factors such as coastal access, but generally ranged from daily to weekly. Location coordinates are reported latitude and longitude as well as X and Y coordinates in the projection/datum California Teale-Albers NAD 1927. The file contains...
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One CSV file with data from basic field surveys of southern sea otters at five sites in California, USA, including (from north to south) Elkhorn Slough, Monterey, Big Sur, Piedras Blancas, and San Luis Obispo, are provided. These are the data used to fit models in Law et al. 2024 (full citation in the larger work) publication in Science. The data consist of otter age, sex, and size morphometrics, measured from sea otter captures; associated forage information collected by visual surveys; and hardness of forage prey species. Complete description of the study objectives, methods, field sites, and uses of these data for analyses and interpretations can be found in Law et al. 2024. Although it is well documented that...
Tags: Alisal-Elkhorn Sloughs,
Big Sur,
Central California Coastal,
Ecology,
Marine Nearshore, All tags...
Monterey,
Moss Landing,
Piedras Blancas,
San Luis Obispo,
USGS Science Data Catalog (SDC),
USGS:3e51948b-450d-4ee6-940b-197f6884034a,
animal behavior,
biota,
ecology,
estuary,
sea otters, Fewer tags
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The GIS shapefile Extra limit counts of southern sea otters 2019 is a point layer representing the locations of sea otter sightings that fall outside the officially recognized range of the southern sea otter (Enhydra lutris nereis) in mainland California. These data were collected during the spring 2019 range-wide census. The USGS range-wide sea otter census has been undertaken each year since 1982, using consistent methodology involving both ground-based and aerial-based counts. The spring census provides the primary basis for gauging population trends by State and Federal management agencies. Sea otter distribution in California (the mainland range) is considered to comprise a band of potential habitat stretching...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: California,
Central California Coastal,
Southern California Coastal,
aerial counts,
biogeography, All tags...
biota,
distribution,
environment,
mammals,
ocean,
range,
sea otter census,
sea otters,
sea otters,
shore counts, Fewer tags
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The current study was designed to provide critical information for resource managers (specifically the Bureau of Ocean Energy Management, henceforth BOEM, and the U.S. Fish and Wildlife Service, henceforth USFWS) about the spatial ecology, population status, and potential population threats to sea otters in Santa Barbara Channel, with particular reference to exposure to manmade structures and sources of oil and natural gas. Our four primary research objectives were: 1. Determine the extent of movements and spatial use patterns by sea otters along the southern California coast 2. Identify important sea otter resting and foraging areas adjacent to manmade structures 3. Assess sea otter distribution, behavior and...
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The data are .csv files of tagged sea otter re-sighting locations (henceforth, resights) collected in the field using a combination of VHF radio telemetry and direct observation using high powered (80x) telescopes. Sea otters were tracked by shore based observers from the date of tagging until the time of radio battery failure or the animal’s death, whichever comes first. The frequency of re-sighting was opportunistic, depending on logistical factors such as coastal access, but generally ranged from daily to weekly. Location coordinates are reported as X and Y coordinates in the projection/datum California Teale-Albers NAD 1927. Each file contains resight data for one individual sea otter collected over a period...
Categories: Data;
Types: ArcGIS REST Map Service,
ArcGIS Service Definition,
Citation,
Downloadable,
Map Service;
Tags: California,
Half Moon Bay,
Santa Barbara,
Santa Barbara Channel Islands,
Southern sea otter, All tags...
USGS Science Data Catalog (SDC),
VHF radio telemetry,
animal movement,
sighting locations,
space use, Fewer tags
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