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MMS Low Altitude Survey for Seabirds, Southern California Bight
Entry ID:
seamap48
Summary
Abstract:
Marine Mammal and Seabird Surveys Of The Southern California Bight Studies: -- So. Calif. Bight Low Aerial [Birds] Study Code: SB Contract Number: AA550-CT7-36
Principal Investigator(s)/Affiliation: K. S. Norris and B. J. Le Boeuf, University of California, Santa Cruz, and G. L. Hunt, University of California, Irvine. Purpose: OBJECTIVES: Objectives of the study were to characterize the marine mammal and seabird fauna of the Southern California Bight, estimate abundance of species, describe the distribution, determine the timing and routes of migrations and movements, and document seasonal changes in numbers or patterns of habitat-use. In addition, studies were conducted to determine the size and status of breeding ... colonies of seabirds and pinnipeds, their productivity, and trends in growth. SUPPLEMENTAL INFORMATION: DATA COLLECTION: TIME PERIOD: May 1975 through March 1978 STUDY AREA: The Southern California Bight, from Point Conception to the U.S.-Mexico boundary and offshore to the 2,000 m isobath. METHODOLOGY: Aerial and ship surveys were conducted along pre-established transects designed to systematically sample marine mammal and seabird abundance in all waters of the study area. Aerial surveys were conducted at two altitudes (200 ft and about 750-1,000 ft ASL) alternating at 2-3 week intervals. Seabirds and pinnipeds were recorded only on the low-altitude surveys which predominantly sampled along eight lines of latitude, separated by 25 nm, and connecting lines of longitude. High-altitude surveys sampled cetacean abundance along 15 Loran lines oriented northeast-southwest and separated by 12-15 nm. On low-altitude surveys, seabirds were counted only within a 50 m corridor on the shaded side of the aircraft. Marine mammals were counted in an unbounded corridor on one side of the aircraft on low-altitude surveys and both sides of the aircraft on high-altitude surveys. A clinometer or marks on the wing-strut were used to estimate the declination, and the measurement or estimate later used to calculate probability density functions of frequency with right-angle distance. Ships were used for surveys of inshore waters along standard (i.e., predetermined and replicate) transects and for search, catch, and tagging/tracking of small cetaceans. The standard ship transect cruises sampled abundance of seabirds and marine mammals over banks, basins, and ridges in waters inshore of the Patton Escarpment (the shelf break). Seabirds and marine mammals were counted on both sides of the cruise track and distance estimated or measured with a range-finder. Catch cruises attempted to find and remain with schools of common dolphin and other small cetaceans; therefore, data on sightings from these cruises cannot be used as samples of animal abundance. The Southern California Bight Study also included ground and aerial censuses of pinniped and seabird colonies, and special studies of productivity, mortality rates, and foraging range. DATABASES PRODUCED: Databases produced include 1) sightings of seabirds and marine mammals on 24 *low-altitude aerial surveys, 2) sightings of cetaceans on 35 high-altitude aerial surveys, 3) sightings of seabirds and marine mammals on 29 ship transect surveys, and 4) sightings of cetaceans on 34 catch cruises. Included in this database are the following: High Altitude Mammal Observations: 75,489 km of effort, 695 sightings of 68,557 individual animals Low Altitude Mammal Observations: 37,843 km of effort, 1,320 sightings of 15,070 individual animals Low Altitude Bird Observations: 35,445 km of effort, 7,950 sightings of 63,359 individual animals Ship Observations: 17,903 km of effort, 23,519 sightings of 181,287 individual animals 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 
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Geographic Coverage
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Data Set Citation
Dataset Originator/Creator:
Center for International Earth Science Information Network (CIESIN)/Columbia University
Dataset Title:
Natural Resource Management Index (NRMI), 2011 Release
Dataset Release Date:
2011
Dataset Release Place:
Palisades, NY
Dataset Publisher:
NASA Socioeconomic Data and Applications Center (SEDAC)
Version:
2011.00
Data Presentation Form:
tabular
Online Resource:
http://sedac.ciesin.columbia.edu/data/set/nrmi-natural-resource-man...
Temporal Coverage
Start Date:
2006-01-01
Stop Date:
2011-12-31
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Access Constraints
The minimum system requirements for ILWIS 3.3 are:
-Pentium with 64 MB RAM -CD-ROM -Operating systems: Windows 98, Me, NT, 2000, XP The recommended system requirements for ILWIS 3.3 are: -Pentium III with 128 MB RAM -CD ROM -24 bit graphic card with a resolution of 1024 x 768 or more -Printer and digitizer -Operating systems: Windows NT, 2000, XP Note: To properly run ILWIS 3.3, Internet Explorer 5 or higher is required. Ancillary Keywords
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Distribution
Distribution Media:
Online
Fees:
No fees
Personnel
Role:
SERF AUTHOR
Phone:
(301) 614-6898
Fax:
301-614-5268
Email:
Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
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TECHNICAL CONTACT
Phone:
+31 (0)53 4874 444
Fax:
+31 (0)53 4874 400
Email:
ilwis at itc.nl
Contact Address:
International Institute for Geo-Information Science and Earth Observation (ITC)
P.O. Box 6
City:
Enschede
Postal Code:
7500 AA
Country:
The Netherlands
Creation and Review Dates
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MMS Low Altitude Survey for Seabirds, Southern California Bight
Entry ID:
seamap48
Summary
Abstract:
Marine Mammal and Seabird Surveys Of The Southern California Bight Studies: -- So. Calif. Bight Low Aerial [Birds] Study Code: SB Contract Number: AA550-CT7-36
Principal Investigator(s)/Affiliation: K. S. Norris and B. J. Le Boeuf, University of California, Santa Cruz, and G. L. Hunt, University of California, Irvine. Purpose: OBJECTIVES: Objectives of the study were to characterize the marine mammal and seabird fauna of the Southern California Bight, estimate abundance of species, describe the distribution, determine the timing and routes of migrations and movements, and document seasonal changes in numbers or patterns of habitat-use. In addition, studies were conducted to determine the size and status of breeding ...
Related URL
Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
Data Set Citation
Dataset Originator/Creator:
Center for International Earth Science Information Network (CIESIN)/Columbia University
Dataset Title:
Natural Resource Management Index (NRMI), 2011 Release
Dataset Release Date:
2011
Dataset Release Place:
Palisades, NY
Dataset Publisher:
NASA Socioeconomic Data and Applications Center (SEDAC)
Version:
2011.00
Data Presentation Form:
tabular
Online Resource:
http://sedac.ciesin.columbia.edu/data/set/nrmi-natural-resource-man...
Temporal Coverage
Start Date:
2006-01-01
Stop Date:
2011-12-31
Location Keywords
Service Keywords
Access Constraints
The minimum system requirements for ILWIS 3.3 are:
-Pentium with 64 MB RAM -CD-ROM -Operating systems: Windows 98, Me, NT, 2000, XP The recommended system requirements for ILWIS 3.3 are: -Pentium III with 128 MB RAM -CD ROM -24 bit graphic card with a resolution of 1024 x 768 or more -Printer and digitizer -Operating systems: Windows NT, 2000, XP Note: To properly run ILWIS 3.3, Internet Explorer 5 or higher is required. Ancillary Keywords
Service Provider
Distribution
Distribution Media:
Online
Fees:
No fees
Personnel
Role:
SERF AUTHOR
Phone:
(301) 614-6898
Fax:
301-614-5268
Email:
Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Creation and Review Dates
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- Webmaster: Monica Holland
- Responsible NASA Official: Lola Olsen
- Last updated: May 2013
