Foraging habitats of the seabird community of Europa Island (Mozambique Channel)
Sebastien Jaquemet

Dataset credit

Sebastien Jaquemet

Contacts

RoleNameOrganization 
Primary contact Sebastien Jaquemet Laboratoire ECOMAR, Universite de la Reunion
Data entry Andrew DiMatteo US Dept. of the Navy Naval Facilities Engineering Command Atlantic

Citation

Abstract

We investigated the foraging habitats of the
winter breeding community of tropical seabirds from
Europa Island (Mozambique Channel) in September
2003. We focused our study on the dominant species of
this austral community, the sooty tern (Sterna fuscata),
the red-footed booby (Sula sula), and the frigatebirds,
including the great (Fregata minor) and the lesser frigatebirds (F. ariel). We considered the at-sea distribution and abundance of these species in relation to
chlorophyll concentration, sea surface temperatures,
sea surface height anomalies, depth of the thermocline,
distance to the colony, and presence of surface marine
predators, flying fishes and other seabirds. Although the
marine environment where seabirds foraged was oligotrophic,
it presents the best feeding opportunities for
seabirds for the area in winter.
Our study demonstrates
that the winter-breeding seabird species of Europa Island
tend to forage in productive waters in association
with other marine predators when possible. Sooty terns
and frigatebirds were widely distributed in the whole
study area, whereas red-footed boobies were not found
farther than 160 km from their colonies and were associated
with relatively productive waters. Sooty terns and
red-footed boobies were aggregated where flying fishes
were abundant. The presence of other marine predators
was associated with larger multispecies feeding flocks
than when no association occurred. Sooty terns, which
are numerically dominant at Europa and adopted network
foraging, seem to be catalysts of feeding events, and represented a good target for the other foraging
species, especially frigatebirds. However, when possible,
frigatebirds favor association with flocks of red-footed
boobies.

Purpose

We studied the at-sea distribution and abundance
of the seabird species that breed during the
austral winter on Europa Island in relation to physical
and biological factors. We tested how the different
species distributed themselves within their foraging
range and whether specific locations aggregate foraging
seabirds. We also examine the foraging strategies
adopted by each species, particularly the importance of
local enhancement on the feeding activity of the seabirds.

Supplemental information

N/A

References

Jaquemet, S., M. Le Corre, F. Marsac, M. Potier and H. Weimerskirch. 2005. Foraging habitats of the seabird community of Europa Island (Mozambique Channel). Marine Biology. 147(3):573-582.

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
oidUnique ID number (generated by SEAMAP)
obs_dateObserved date
obs_timeObserved time
latitudeLatitude of observation
longitudeLongitude of observation
sp_obsSpecies observed
sp_tsnSpecies ITIS TSN
obs_countNumber of animals observed
transect
obs_number
id
behaviorvd: vol direct = flying, ep: en pêche = fishing, po: posé = sitting on the water
notesnotes on sex and age
poissonsfish sightings
mammiferesmarine mammal sightings
OBIS-SEAMAP ID691
Seabirds357
Marine mammals0
Sea turtles0
Rays and sharks0
Other species0
Non spatial0
Non species0
Total357
Date, Begin2003-09-08
Date, End2003-09-22
Temporal prec.111111
Latitude-24.01 - -19.73
Longitude38.95 - 41.65
Coord. prec.6 decimal digits
PlatformBoat
Data typeAnimal sighting
EffortN/A
Registered2010-11-24
Updated2011-05-23
StatusPublished
Sharing policy CC-BY-NC (Minimum)
Also availalbe from iOBIS
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