New Evidence for a South Atlantic Stock of Humpback Whales Wintering on the Northwest African Continental Shelf

2013 ◽  
Vol 48 (1) ◽  
pp. 177-186 ◽  
Author(s):  
Koen Van Waerebeek ◽  
Abdoulaye Djiba ◽  
Jens-Otto Krakstad ◽  
Abdellahi Samba Ould Bilal ◽  
Idrissa L. Bamy ◽  
...  
Keyword(s):  
Continental Shelf ◽  
South Atlantic ◽  
Humpback Whales ◽  
New Evidence

New evidence for a South Atlantic stock of humpback whales wintering on the Northwest African continental shelf

2013 ◽  
Vol 48 (1) ◽  
pp. 177-186 ◽  
Author(s):  
Koen Van Waerebeek ◽  
Abdoulaye Djiba ◽  
Jens-Otto Krakstad ◽  
Abdellahi Samba Ould Bilal ◽  
Idrissa L. Bamy ◽  
...  
Keyword(s):  
Continental Shelf ◽  
South Atlantic ◽  
Humpback Whales ◽  
New Evidence

The shark genus Carcharhinus Blainville, 1816 (Chondrichthyes : Carcharhinidae) in Argentine waters

1998 ◽  
Vol 49 (7) ◽  
pp. 747 ◽  
Author(s):  
Gustavo E. Chiaramonte
Keyword(s):  
Continental Shelf ◽  
Buenos Aires ◽  
South Atlantic ◽  
Carcharhinus Plumbeus ◽  
Carcharhinus Leucas ◽  
First Time ◽  
New Evidence

The purpose of this contribution is to review the species of the shark genus Carcharhinus found along the coast of Argentina. New southern limits for the distribution of the genus are given for the western South Atlantic. The presence of Carcharhinus leucas (Valenciennes, 1839) is recorded for the first time on the Province of Buenos Aires coast. New evidence is given which confirms the presence of Carcharhinus brachyurus(GÜnther, 1870) in the area. Carcharhinus plumbeus (Nardo, 1827) is known from only a single Argentine record. Carcharhinus longimanus (Poey, 1861) has been recorded from oceanic waters offshore of Argentina, but has not been taken from continental shelf waters. Resumen. En éste trabajo se revisan las especies de tiburones del género Carcharhinus encontradas en la costa de la Argentina. Nuevos límites septentrionales para la distribución de las especies del género en el Atlántico Sudoccidental son presentados. Se refiere por primera vez la presencia de Carcharhinus leucas (Valenciennes, 1839) para la costa de la Provincia de Buenos Aires. Se presenta nueva evidencia que confirma la presencia de Carcharhinus brachyurus (GÜnther, 1870) en el área. Carcharhinus plumbeus (Nardo, 1827) ha sido citado una sóla vez para Argentina. Carcharhinus longimanus (Poey, 1861) ha sido registrado en aguas oceánicas frente a la plataforma de Argentina, pero no en aguas sobre la plataforma continental.

scholarly journals Cetacean records along a coastal-offshore gradient in the Vitória-Trindade Chain, western South Atlantic Ocean

2014 ◽  
Vol 74 (1) ◽  
pp. 137-144 ◽  
Author(s):  
LL Wedekin ◽  
MR Rossi-Santos ◽  
C Baracho ◽  
AL Cypriano-Souza ◽  
PC Simões-Lopes
Keyword(s):  
Humpback Whale ◽  
South Atlantic ◽  
Breeding Habitat ◽  
Humpback Whales ◽  
Balaenoptera Physalus ◽  
Fin Whale ◽  
Antarctic Minke Whale ◽  
Trindade Island ◽  
The Antarctic ◽  
Species Being

Oceanic waters are difficult to assess, and there are many gaps in knowledge regarding cetacean occurrence. To fill some of these gaps, this article provides important cetacean records obtained in the winter of 2010 during a dedicated expedition to collect visual and acoustic information in the Vitória-Trindade seamounts. We observed 19 groups of cetaceans along a 1300-km search trajectory, with six species being identified: the humpback whale (Megaptera novaeangliae, N = 9 groups), the fin whale (Balaenoptera physalus, N = 1), the Antarctic minke whale (Balaenoptera bonaerensis, N = 1), the rough-toothed dolphin (Steno bredanensis, N = 1), the bottlenose dolphin (Tursiops truncatus, N = 2), and the killer whale (Orcinus orca, N = 1). Most humpback whale groups (N = 7; 78%) were observed in the Vitória-Trindade seamounts, especially the mounts close to the Abrolhos Bank. Only one lone humpback whale was observed near Trindade Island after a search effort encompassing more than 520 km. From a total of 28 acoustic stations, humpback whale songs were only detected near the seamounts close to the Abrolhos Bank, where most groups of this species were visually detected (including a competitive group and groups with calves). The presence of humpback whales at the Trindade Island and surroundings is most likely occasional, with few sightings and low density. Finally, we observed a significant number of humpback whales along the seamounts close to the Abrolhos Bank, which may function as a breeding habitat for this species. We also added important records regarding the occurrence of cetaceans in these mounts and in the Western South Atlantic, including the endangered fin whale.

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