Macalester College marine mammal sightings around Grenada, West Indies 1999
Aldemaro Romero, Macalester College

Dataset credit

Aldemaro Romero, Macalester College


Primary contact Aldemaro Romero Southern Illinois University Edwardsville
Data entry Connie Kot Duke University



To document the Grenadian marine mammal fauna and its distribution in the eastern Caribbean, we conducted field and archival studies in that country. All records of sirenians and cetaceans for Grenada were assembled and analyzed. The total number of confirmed marine mammal species for this part of the world is 11. The humpback whale (Megaptera novaeangliae) was the most commonly reported mysticete species while a variety of odontocetes seem to be equally frequent in those waters. The manatee (Trichechus manatus) has been extinct from those waters for at least 300 years. Comparison with the marine mammal fauna of adjacent regions (Venezuela, Trinidad, and St. Vincent and the Grenadines), leads us to believe that at least seven additional species of cetaceans may be present in Grenadian waters, probably as occasional visitors.


There are three indications that the marine mammal fauna of Grenada may be much more abundant and diverse than ever reported. Therefore, we decided to investigate the nature of the marine mammal fauna for that country. To that end, we combined information for three major sources: data from published or unpublished (archival) documents, accounts from reliable observers, and our own field observations. As a result, we have been able to increase the number of confirmed records from three to 11.

Supplemental information

Sightings from the field observations are a subset of the entire dataset, presented here on OBIS-SEAMAP.

For records that did not have time of observation available, "00:00:00" was used and noted in the [Notes] field.

For records that originally sighted a range for the number of individuals observed, the median number was used to be conservative, and noted in the [Notes] field.




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
oidUnique ID (created by OBIS-SEAMAP)
recnumRecord number (by spreadsheet)
latitudeLatitude (decimal degrees)
longitudeLongitude (decimal degrees)
latdegLatitude (degree)
latminLatitude (minute)
longdegLongitude (degree)
longminLongitude (minute)
landrefLand reference (distance in m)
depthDepth (m)
obs_timeTime of observation
durationDuration of observation (minutes:seconds)
numindNumber of individuals
obs_countNumber of animals sighted
sp_obsSpecies observed
obs_dateDate of observation
sp_tsnSpecies ITIS TSN
notesNotes for when time was not available or when abundance was originally a range and a median was used (created by OBIS-SEAMAP)
geomGeometry field added by OBIS-SEAMAP
Marine mammals12
Sea turtles0
Rays and sharks0
Other species0
Non spatial0
Non species0
Date, Begin1999-07-24
Date, End1999-07-28
Temporal prec.111110
Latitude12.11 - 12.65
Longitude-61.85 - -61.49
Coord. prec.6 decimal digits
Data typeAnimal sighting
Sharing policy CC-BY-NC (Minimum)
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