Killer whales occurrences in Venezuelan waters 1982-2008
Jaime Bolaños-Jiménez

Dataset credit

Jaime Bolaños-Jiménez

Contacts

RoleNameOrganization 
Primary contact Jaime Bolanos Sea Vida
Data entry Ei Fujioka Duke University

Citation

Abstract

Reported occurrences of the killer whale (Orcinus orca) off Venezuela are scarce. Eighteen records were opportunistically collected from April 1982 through January 2008. Bottom depth for the sightings was 10-1,500 m (mean = 444 + SD = 405; mode = 400, n = 18). Five records had available associated still photographs or video. Noteworthy was a videotaped attack by two killer whales on a leatherback turtle (Dermochelys coriacea). Group size ranged from 1-5 individuals (mean = 2.67 + SD = 1.57; mode = 1, n = 18). Adult males were present during 67% of reported sightings; females/juveniles were present in 61% (n = 12 and 11, respectively). Pictures of two male killer whales were sent to researchers in Brazil and the Bahamas for comparison purposes. Adult males were present in 92% of reported sightings. Females and juveniles were observed during 67% of reported sightings. 83% of the records were from December through May. There is currently not enough information to speculate on any seasonality to the occurrence of this species in Venezuelan waters.

Purpose

The purpose of this work was to update information on killer whale occurrences in Venezuelan waters, on the basis of opportunistic sightings and/or pictures provided by non-professional observers.

Supplemental information

A few records did not record day or day and month. For these records, month and day fields were filled with 1. A note was added to [remarks] field, which may be released upon the data provider's permission.

References

Attributes

Overview

Attributes described below represent those in the original dataset provided by the provider.
Only minimum required attributes are visible and downlodable online. Other attributes may be obtained upon provider's permission unless otherwise noted below.

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 in dataset provided

Attribute (table column)Description
row_idRow ID
obs_dateSighting date. A few records did not record day part or month and day parts. If this is the case, a note was added to "remarks" field.
locationLocation
latitudeLatitude in decimal degrees
longitudeLongitude in decimal degrees
depthDepth in meters
sp_obsSpecies observed (added by OBIS-SEAMAP)
sp_tsnTaxonomic Serial Number by Integrated Taxonomic Information System
obs_countNumber of animals
maleNumber of males in the group
femaleNumber of females or juveniles in the group
remarksRemarks
observerObserver or source
geomdefinition not provided
oidUnique ID number (generated by SEAMAP)
OBIS-SEAMAP ID522
Seabirds0
Marine mammals18
Sea turtles0
Rays and sharks0
Other species0
Non spatial0
Non species0
Total18
Date, Begin1982-04-01
Date, End2008-01-15
Temporal prec.111000
Latitude10.41 - 11.77
Longitude-68.27 - -64.23
Coord. prec.5 decimal digits
PlatformBoat
Data typeAnimal sighting
EffortN/A
Registered2009-08-11
Updated2010-08-24
StatusPublished
Sharing policy CC-BY (All)
Also availalbe from iOBIS
GBIF
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1