SEFSC Southeast Cetacean Aerial Survey 1992
NOAA Southeast Fisheries Science Center (SEFSC)
Garrison, L. 2013. SEFSC Southeast Cetacean Aerial Survey 1992. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/87) on yyyy-mm-dd.
Halpin, P.N., A.J. Read, E. Fujioka, B.D. Best, B. Donnelly, L.J. Hazen, C. Kot, K. Urian, E. LaBrecque, A. Dimatteo, J. Cleary, C. Good, L.B. Crowder, and K.D. Hyrenbach. 2009. OBIS-SEAMAP: The world data center for marine mammal, sea bird, and sea turtle distributions. Oceanography. 22(2):104-115.
Southeast Cetacean Aerial Survey, SECAS, was conducted in 1992 by NOAA Southeast Fisheries Science Center (SEFSC) to estimate cetaceans abundance. This data set contains sightings of cetaceans and sea turtles as well as other species, including fish and shark, observed during the aerial survey. Marine mammals and sea turtles observed were:
- Atlantic spotted dolphin
- Northern right whale
- Standard Bottlenose dolphin
- Green turtle
- Kemp's ridley
This survey's transects are available in the 'SECAS91Efforts' table/shapefile. ESRI coverage and shapefiles are available for this data set.
The purpose of this data set was to collect Cetacean distribution data and allow for estimating Cetacean abundance in the Southeast. These abundance estimates were expected to serve as a basis for estimating Potential Biological Removals (PBR) for the species stocks in the region in support of Marine Mammal Protection Act (MMPA) requirements.
More specifically, the survey was to obtain an index of abundance for Tursiops truncatus so as to detect population trends by comparison with historical abundance data (SETS).
[UPDATE 2013-12-18] Count field is emptied for a Loggerhead sighting at 1992-01-25 13:16:45. Previously, it was a zero.
Records with no common name were observations of pollution (e.g., plastic).
Records were assigned a sequential number LineNo. LineNo can be used to match observations with corresponding transects, each of which has BegLineNo and EndLineNo fields. Observation records with their LineNo between BegLineNo and EndLineNo in a transect are related to that transect.
A duplicated LineNo indicates more than one species were observed at the same time.
Records include 'off-effort' sightings. Card 'D' indicates the observation was recorded while on-effort. Card 'F' indicates the observation was recorded while off-effort.
When searching for a specific species, note that some records don't identify animals observed at a species level. If this is the case, the common/scientific name may be genus/family or higher (e.g., Balaenoptera sp.).
Attributes described below represent those in the original dataset provided by the provider.
The dataset contains information necessary to locate the species sightings observed in the survey. The structure of the dataset was defined by NOAA Southeast Fisheries Science Center. Note that the dataset is a subset of the larger, complete dataset collected in the survey which includes environmental information. The columns before LineNo are applied to the shapefile only. The following information is not included in the dataset but will be found in the master data. For details, please contact NOAA Southeast Fisheries Science Center. Track; Speed; GPS Status; Observers; Airplane altitude; Weather; Sea state; Turbidity; Sunlight; Glare; Water color; Water temperature; Sighting angle; Effort status.
Attributes in dataset provided
|Rays and sharks||100|
|Latitude||26.21 - 35.16|
|Longitude||-81.42 - -75.46|
|Coord. prec.||4 decimal digits|
|Data type||Animal sighting|
|Effort||YES (ID: 91)|
|Sharing policy||CC-BY-NC (Minimum)|
|Also availalbe from||
|See metadata in static HTML|
|See metadata in FGDC XML|
|See download history / statistics|