Bryde’s whales off eastern Venezuela - Vessel 1978-1979
Hubbs-Sea World Research Institute
Dataset credit
N/A
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Contacts
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Citation
Notarbartolo di Sciara, G. 2013. Bryde’s whales off eastern Venezuela - Vessel 1978-1979. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/835) 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.
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Abstract
Systematic surveys, conducted between 28 October 1978 and 13 November 1979 in the waters adjacent to Puerto la Cruz and Isla Margarita, Venezuela, documented the presence, distribution and habits of a population of Bryde's whales. Methods included aerial and boat surveys, interviews with local fishermen, and radio-tagging. Bryde's whales, apparently attracted by the abundance of food, were observed in the area between March and December; numbers were greatest in fall. Distribution within the study area varied with season: between march and August the whales were seen in the eastern part; from August to December in the western. Herd size increased from march through October. Although several cow and calf pairs were seen, breeding activities were not, and there is no evidence that this is a breeding area.
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Purpose
Surveys were supported by the local company Turismo Margarita S.A., to better understand the causes of collisions between passenger jet hydrofoils and large marine animals, and advise on procedures to minimize such risk.
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Supplemental information
An accompanying aerial survey dataset Bryde's whales off eastern Venezuela - Aerial 1978-1979 is available. The provider digitized the locations from the literature. The accuracy of the dates is year. Months and days are approximate. No time is provided. Substituted with 00:00:00. No group size is provided. Substituted with 1.
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References
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Attributes
Overview
This section explains attributes included in the original dataset.
OBIS-SEAMAP restricts the attributes available to the public to date/time, lat/lon and species names/counts only.
Should you need other attributes described here, you are encouraged to contact the data provider.
Attributes described below represent those in the original dataset provided by the provider.
All attributes are included in the downloadable file (CSV or ESRI File Geodatabase) for "Complete Set of Dataset".
Attributes in dataset
Attribute (table column) | Description |
oid | |
record_id | progressive number |
database | data credits |
project | Turismo Margarita Project (TMP) |
obs_date | Approximation of date: +/- 1,5 months based on information contained in Notarbartolo di Sciara 1983. |
obs_year | Year of the observation |
obs_time | Approximation of local time: +/- 7 hours based on information contained in Notarbartolo di Sciara 1983. |
latitude | Latitude in decimal degrees |
longitude | Longitude in decimal degrees |
sp_obs | Species name |
sp_tsn | Taxonomic Serial Number added by OBIS-SEAMAP |
obs_count | group size = 1, to avoid overestimates, based on information contained in Notarbartolo di Sciara 1983. |
platform | |
geom | |
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OBIS-SEAMAP ID | 835 |
Seabirds | 0 |
Marine mammals | 28 |
Sea turtles | 0 |
Rays and sharks | 0 |
Other species | 0 |
Non spatial | 0 |
Non species | 0 |
Total | 28 |
Date, Begin | 1979-03-15 |
Date, End | 1979-11-15 |
Temporal prec. | 100000 |
Latitude | 10.39 - 10.92 |
Longitude | -64.68 - -63.83 |
Coord. prec. | 6 decimal digits |
Platform | Boat |
Data type | Animal sighting |
Effort | N/A |
if ($show_effort_stat) {
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Traveled (km) | 0 |
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}
if ($sources != null and $sources != "" and $dataset_id != 427) { // Do not show ESAS
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Contr. through | |
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Registered | 2012-03-16 |
Updated | 2013-10-07 |
Status | Published |
Sharing policy |
CC-BY (All) |
Shared with |
OBIS
GBIF (via DOI) |
See metadata in static HTML |
See metadata in FGDC XML |
See download history / statistics |
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