Dear Marmamers:

We're pleased to announce the publication of:

Marine Biodiversity Records, page 1 of 6. # Marine Biological Association of 
the United Kingdom, 2010 doi:10.1017/S1755267210000576; Vol. 3; e68; 2010 
Published online

 

On the Occurrence of sei whales, Balaenoptera borealis, in the South-western 
Atlantic

 

MIGUEL IÑÍGUEZ1,2, JUAN F. MASELLO3, CÉSAR GRIBAUDO4, DÉBORA ARCUCCI1, 
FLORENCIA KROHLING1 AND JIMENA BELGRANO1

 

1Fundación Cethus, Potosí 2087, (B1636BUA), Olivos, Prov. Buenos Aires, 
Argentina.  

2Whale and Dolphin Conservation Society, Brookfield House, 38 St Paul Street, 
Chippenham,

SN15 1LJ, United Kingdom. 3 Max Planck Institute for Ornithology, Vogelwarte 
Radolfzell, Germany. 4 Dirección de Museos de Caleta Olivia,  Prov. Santa Cruz, 
 Argentina. 

e.mail: [email protected]

 

Abstract

This paper reports on the occurrence of the Sei whale (Balaenoptera borealis) 
in the South-western Atlantic. Only in recent years Sei whale sightings have 
been reported regularly within the surveyed area. In a total of 20 sightings, 
65% were reported from August to September. Group size was small, averaging 
1.94 (SD=1.21) individuals per group. During this study, feeding behavior and 
interactions with sea birds were observed and are here described. Comparison of 
our results with historical data from the whaling industry showed that whales 
were observed where expected based on past catches. Further studies are 
necessary in order to assess the status of Sei whales in the southwestern 
Atlantic. However, our data might indicate a slow recovery in the region. This 
information will be useful for the conservation of the species in this area and 
in the Southern Hemisphere.



A pdf copy can be asked to [email protected]

Alll the best

Jimena Belgrano
Fundación Cethus
www.cethus.org
Argentina
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