Seabird and cetacean sightings from Cruise SY002 of RV Shoyo Maru, Tropical Atlantic Ocean, Oct. 2000

Philippe Borsa, Institut de Recherche pour le Developpement, Departement des Ressources Vivantes

Dataset credit

Institut de Recherche pour le Developpement, Departement des Ressources Vivantes


Primary contact Philippe Borsa IRD - UR 227 Biocomplexité des écosystèmes récifaux
Data entry Connie Kot


Borsa, P. 2012. Seabird and cetacean sightings from Cruise SY002 of RV Shoyo Maru, Tropical Atlantic Ocean, Oct. 2000. Data downloaded from OBIS-SEAMAP ( on yyyy-mm-dd.


The international program BETYP on the bigeye tuna (Thunnus obesus) allowed us to board the Japanese research vessel Shoyo Maru. During this mission, the longline vessel was rigged to carry out four crossings of the Atlantic Ocean. The mission conducted from September 28 to October 26, 2000 corresponds to the first that crosses the Atlantic from west to east. The first operation of project THETIS (UR No. 109 of the IRD) is focused on the study of predator-prey relationships. The program will study the food and trophic relationships of tunas and associated species in four regions of the Indian Ocean and three of the Atlantic. The platform of the Shoyo Maru in the Atlantic was a good opportunity to collect stomach contents of fish caught by longline.


Mission Objectives:

  • Recovery of water samples at different depths to measure
    concentrations of nitrite.

  • Recovery of stomachs of tunas caught by longline and species associated.

  • Study of potential prey for tuna trawling by day and night in the diffusing layer or deep scattering layer (DSL). Particular attention was paid to Vinciguerria nimbaria. The PICOLO program has highlighted the important role of this prey species for tunas in the equatorial Atlantic.

  • Collection of otoliths of bigeye tuna (Thunnus obesus) and yellowfin (Thunnus albacares) caught during fishing operations.

  • For this mission, tissue samples for the study of genetic
    populations of some species have been collected. Observations of cetaceans and seabirds were also conducted.

Supplemental information

[2020-09-30] The following invalid species names were corrected according to the Integrated Taxonomic Information System (ITIS).
Sooty Tern: Sterna fuscata (176894) => Onychoprion fuscatus (824105)

An additional sea turtle, Caretta caretta was captured on a longline set for tuna, but the exact time and coordinates of that observation were not available.

Records that had an estimated count of “plusieurs” were given a conservative count of “2.” When an estimated range of animals was sighted, the median value (rounded down) was used as the observed count; when a minimum number of animals was recorded, the minimum number was used as the observed count (i.e., >100 = 100 animals).




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
oidUnique ID number (generated by SEAMAP)
obs_dateObserved date
durationdefinition not provided
obs_countNumber of animals observed
sp_tsnSpecies ITIS TSN
sp_obsSpecies observed
obs_timeObserved time
latitudeLatitude of observation
longitudeLongitude of observation
notesTime is in local time
geomdefinition not provided
Marine mammals10
Sea turtles1
Rays and sharks0
Other species2
Non spatial0
Non species0
Date, Begin2000-10-01
Date, End2000-10-21
Temporal prec.111111
Latitude8.27 - 21.38
Longitude-78.77 - -24.83
Coord. prec.6 decimal digits
Data typeAnimal sighting
Traveled (km)0
Contr. through
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