Cetacean and sea turtle sightings from offshore Republic of Congo
Marijke N. de Boer
Dataset credit
Marijke N. de Boer
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Contacts
Role | Name | Organization | |
Primary contact |
Marijke de Boer |
Wageningen Marine Research, University of Wageningen |
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Data entry |
Ei Fujioka |
Duke University |
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Citation
de Boer, M. 2024. Cetacean and sea turtle sightings from offshore Republic of Congo. Data downloaded from OBIS-SEAMAP (https://seamap.env.duke.edu/dataset/2294) 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
The cetacean communities inhabiting eastern tropical Atlantic (ETA) waters along the west coast of Africa are globally amongst the most poorly studied. The limited recent information available is derived mainly from the monitoring of strandings and fisheries interactions at landing sites. However, little is known about the habitat preferences of the species that occur off Congo because at-sea sightings have rarely been published.
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Purpose
The main purpose of this study was to contribute information on the distribution and relative abundance of cetaceans sighted during a geophysical survey in Congo waters and where possible relating the occurrence of different species with oceanographic parameters such as sea surface temperature (SST) and depth.
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Supplemental information
The cetacean & turtle data were collected during a dedicated marine megafauna survey
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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.
Only minimum required attributes are visible and downloadable online. Other attributes may be obtained upon provider's permission.
Attributes in dataset
Attribute (table column) | Description |
oid | Unique ID number (generated by OBIS-SEAMAP) |
sighting_number | Sighting number |
date_time | Date and time at GMT |
observer | Observer name |
decimal_latitude | Latitude at decimal degrees |
decimal_longitude | Longitude at decimal degrees |
water_depth | Water depth (metres) |
species | Species name |
latin_name | Scientific name |
sp_tsn | Taxonomic Serial Number added by OBIS-SEAMAP |
certainty | Certainty of the animal identification |
bearing_to_animal | Bearing to animal |
range_of_animal | Range of animal (metres) |
total_number | Total number of individuals |
number_of_adults | Number of adults |
number_of_juveniles | Number of juveniles |
number_of_calves | Number of calves (visual sightings only) |
photo | Was photo taken (yes/no) |
behaviour | Behaviour |
direction_of_travel | Direction of travel (compass points) |
geom | Geometry field added by OBIS-SEAMAP |
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OBIS-SEAMAP ID | 2294 |
Seabirds | 0 |
Marine mammals | 674 |
Sea turtles | 12 |
Rays and sharks | 0 |
Other species | 0 |
Non spatial | 0 |
Non species | 0 |
Total | 686 |
Date, Begin | 2023-08-13 |
Date, End | 2023-09-14 |
Temporal prec. | 111110 |
Latitude | -5.77 - -4.66 |
Longitude | 10.01 - 11.84 |
Coord. prec. | 5 decimal digits |
Platform | Boat |
Data type | Animal sighting |
Effort | N/A |
if ($show_effort_stat) {
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Traveled (km) | 0 |
| 0 |
}
if ($sources != null and $sources != "" and $dataset_id != 427) { // Do not show ESAS
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Contr. through | |
}
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Registered | 2024-05-30 |
Updated | 2024-06-03 |
Status | Published |
Sharing policy |
CC-BY-NC (Minimum) |
Shared with |
OBIS
GBIF (via DOI) |
See metadata in static HTML |
See metadata in FGDC XML |
See download history / statistics |
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