MMS Central/Northern California High-altitude mammalsEntry ID: seamap40
Abstract: Principal investigator/affiliation: Thomas P. Dohl, Center for Marine Studies, University of California, Santa Cruz. Marine Mammal And Seabird Surveys Of Central And Northern California Studies: Central/Northern Calif - High Aerial [Cetaceans] Study Code: CH Contract Number: 14-12-0001-29090
Purpose: To determine species composition, distribution, abundance, and seasonal variation for marine mammal and seabird populations, provide a description of habitat use, and identify areas of special biological importance to these populations in the central and northern California study area.
Study area: Shelf, slope, and offshore waters to a distance ... of 100 nm off the California coast from Point Conception to the California-Oregon boundary. Methodology: Offshore transect surveys were flown twice-monthly at two different altitudes (200 ft and about 750-1,000 ft ASL) along approximately 40 east-west transect lines extending an average of 60 nm offshore. The transects sampled on a given survey were selected randomly from a set of 92 standard (predetermined) lines spaced at intervals of 5' of latitude. Standard transects provided systematic coverage of shelf, slope, and offshore waters in the study area. Sightings of seabirds, pinnipeds, and sea otters were recorded only on low-altitude surveys. Sightings of cetaceans and turtles were recorded on both low- and high-altitude surveys. Seabird sightings were recorded only on the shaded side of the aircraft within a strip transect of 50 m width. Marine mammal and turtle sightings were recorded within an unbounded corridor on both high- and low-altitude surveys, but only the shaded side of the aircraft was searched on the low-altitude surveys. Cross-legs connecting standard transects were searched only on high-altitude surveys. Offshore cross-legs were searched on both sides of the aircraft, while only the nearshore side was searched on cross-legs along the coast. Declination angle was measured and noted for each marine mammal/turtle sightings and later used to calculate a probability density function of frequency with right-angle sighting distance. Navigation was by Loran and VLF-Omega.
Databases Produced: Three databases of sightings at sea were produced by these studies (data on numbers of seabirds and pinnipeds on land were also collected but are not addressed in the present study). These include 1) sightings of cetaceans and turtles recorded on 36 high-altitude aerial surveys, 2) sightings of cetaceans, pinnipeds, sea otters, and turtles recorded on 36 low-altitude aerial surveys, and 3) sightings of seabirds on 36 low-altitude aerial surveys. Each sighting database is accompanied by files providing the search effort on transect and environmental characteristics of the waters surveyed (e.g., sea surface temperature). Contract Number: 14-12-0001-29090
CURRENTNESS REFERENCE: ground condition
SPATIAL REFERENCE INFORMATION - GEODETIC MODEL
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
Data Set Citation
Dataset Originator/Creator: Minerals Management Service
Dataset Title: MMS Central/Northern California High-altitude mammals
Dataset Series Name: OBIS-SEAMAP
Dataset Release Date: 2004-02-12 21:32:45.844445-05
Dataset Release Place: http://seamap.env.duke.edu/
Dataset Publisher: OBIS-SEAMAP
Data Presentation Form: vector digital dataOnline Resource: http://www.mms.gov/
This data set description is a member of a collection. The collection is described in
Start Date: 1980-03-10Stop Date: 1983-02-16
Latitude Resolution: 0.000167 Decimal degrees
Longitude Resolution: 0.000167 Decimal degrees
Horizontal Resolution Range: 1 meter - < 30 meters
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CARNIVORES > SEALS/SEA LIONS/WALRUSES
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CETACEANS
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CETACEANS > BALEEN WHALES
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CETACEANS > TOOTHED WHALES
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CARNIVORES > OTTERS
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > REPTILES > TURTLES
Quality Records for stations in Loxahatchee National Wildlife Refuge (LOX) are monthly. The period of record varies for the data depending on what data were collected.
Water-quality and ancillary data were collected from the files of the U.S. Geological Survey, South Florida Water Management District, Everglades National Park, Big Cypress National Preserve, the U.S. Fish and ... Wildlife Service, some southern Florida County agencies, State of Florida agencies, and other sources of long-term water-quality and ancillary data. Available data was collected in electronic files from the original source. The intention was not to collect every available piece of data, but to collect data with the potential to detect long-term trends or lack thereof in chemical concentrations. Focus was on chemicals of environmental importance.
Station location and description, and period of record data are stored for each sampling location in the USGS NWIS database and in the South Florida Water Management District DBHYDRO database.
Data were reformatted, if necessary, for storage in a database at the U.S. Geological Survey Subdistrict Office in Tampa, Florida. When feasible, data was screened using chemical logic checks developed by Ronald Miller of the USGS in St. Petersburg, Florida.
Various graphs and statistical evaluations were used to detect correlations between variables and trends in concentration. Selected graphs and statistical results will be incorporated into a written report of the interpretations.
Access Constraints None
Use Constraints These data are subject to change and are not citeable until reviewed and approved for official publication.
Data Set Progress
Distribution Size: 2.5
Distribution Format: Excel
Role: TECHNICAL CONTACT
Phone: (813) 975-8620 ext. 128
Fax: (813) 942-9521
Email: aetorres at usgs.gov
U.S. Geological Survey 227 N. Bronough Street
Province or State: FL
Postal Code: 32301
Role: DIF AUTHOR
Email: alicia.m.aleman at nasa.gov
Goddard Space Flight Center Code 610.2
Province or State: MD
Postal Code: 20771
McPherson, Benjamin F., Halley, Robert; 1996; The South Florida Environment: a region under stress; USGS Circular, 1134, U.S. Geological Survey Southern Florida NAWQA Program publication
McPherson, Benjamin F., Miller, Ronald L.; Haag, Kim H.; Bradner, Anne; 2000; Water Quality in Southern Florida, 1996 - 98, USGS Circular, 1207, U.S. Geological Survey http://pubs.usgs.gov/circ/circ1207/
Miller, Ronald L., McPherson, Benjamin F.; Haag, Kim H. 1999; Water quality in the southern Everglades and Big Cypress Swamp in the vicinity of the Tamiami Trail, 1996-97; USGS Water Resources Investigations Report, 99-4062, U.S. Geological Survey http://fl.water.usgs.gov/Abstracts/wri99_4062_miller.html
Miller, Ronald L., McPherson, Benjamin F. 2001; Occurrence And Distribution Of Contaminants In Bottom Sediment and Water Of The Barron River Canal, Big Cypress National Preserve, Florida, October 1998; Florida Scientist, v. 64, n. 1, Florida Academy of Sciences
Originally published in Florida Scientist, vol. 64, Winter, 2001, Number 1
Miller, Ronald L., McPherson, Benjamin F.; Sobczak, Robert; Clark, Christine; 2004; Water Quality in Big Cypress National Preserve and Everglades National Park - Trends and Spatial Characteristics of Selected Constituents; Water Resources Investigations Report, 03-4249, U.S. Geological Survey http://sofia.usgs.gov/publications/wri/03-4249/
Miller, R. L., McPherson, B. F. 2008; Water Quality in the Arthur R. Marshall Loxahatchee National Wildlife Refuge - Trends and Spatial Characteristics of Selected Constituents, 1974-2004; USGS Scientific Investigations Report, 2007-5277, U.S. Geological Survey
Creation and Review Dates
DIF Creation Date: 2008-04-11
Last DIF Revision Date: 2008-11-25