Potential endocrine correlation with exposure to domoic acid in Southern Right Whale (Eubalaena australis) at the Península Valdés breeding ground

Background The Southern Right Whale (Eubalaena australis) population of the South–western Atlantic Ocean is recovering. In the breeding ground of Peninsula Valdés, as a consequence of the population growth, expansion to new areas by some types of groups and a change in the habitat use patterns at the coastal area were recorded. Methods We analysed information gathered from aerial surveys conducted along the coast of Peninsula Valdés in 15 years of effective sampling in a 19-year span. These surveys were divided into four periods (1999–2000; 2004–2007; 2008–2012 and 2013–2016) and estimated the density of whales in a 620 km of coast divided into segments of five km. Results The density of the whales increased to near three whales per km2 (averaged over each period) in the high-density areas. When this mean number was reached, the significant changes in density in the adjacent areas were detected in the following period. These changes were a decrease in density in the high-density areas and an increase of density in the low-density areas. Discussion We propose that a threshold in density elicits a response in habitat use, with the Mother-calf pairs remaining in the area, while the other groups are displaced to new areas.

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Use of satellite imagery to identify southern right whales ( Eubalaena australis ) on a Southwest Atlantic Ocean breeding ground

Marine Mammal Science ◽

10.1111/mms.12847 ◽

2021 ◽

Author(s):

Audrey A. Corrêa ◽

João H. Quoos ◽

André S. Barreto ◽

Karina R. Groch ◽

Patricia P. B. Eichler

Keyword(s):

Atlantic Ocean ◽

Satellite Imagery ◽

Breeding Ground ◽

Southwest Atlantic ◽

Eubalaena Australis ◽

Right Whales ◽

Southern Right Whales

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FIRST RECORD OF MOVEMENT OF A SOUTHERN RIGHT WHALE (EUBALAENA AUSTRALIS) BETWEEN WARM WATER BREEDING GROUNDS AND THE ANTARCTIC OCEAN, SOUTH OF 60oS1,2

Marine Mammal Science ◽

10.1111/j.1748-7692.1999.tb00895.x ◽

1999 ◽

Vol 15 (4) ◽

pp. 1337-1342 ◽

Cited By ~ 16

Author(s):

J. L. Bannister ◽

L. A. Pastene ◽

S. R. Burnell

Keyword(s):

First Record ◽

Warm Water ◽

Antarctic Ocean ◽

Right Whale ◽

Eubalaena Australis ◽

Breeding Grounds ◽

The Antarctic

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CLUSTER ANALYSIS OF GROUP TYPES IN SOUTHERN RIGHT WHALE (EUBALAENA AUSTRALIS)

Marine Mammal Science ◽

10.1111/j.1748-7692.1990.tb00222.x ◽

1990 ◽

Vol 6 (1) ◽

pp. 17-24 ◽

Cited By ~ 1

Author(s):

Marcelo H. Cassini ◽

Bibiana L. Vila

Keyword(s):

Cluster Analysis ◽

Right Whale ◽

Eubalaena Australis

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Half a century of sightings data of southern right whales in Mar del Plata (Buenos Aires, Argentina)

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315419001036 ◽

2019 ◽

Vol 100 (1) ◽

pp. 165-171

Author(s):

Maria A. Mandiola ◽

Gisela Giardino ◽

Julián Bastida ◽

Sergio Morón ◽

Diego H. Rodríguez ◽

...

Keyword(s):

Buenos Aires ◽

Buenos Aires Province ◽

Western Atlantic ◽

Right Whale ◽

Eubalaena Australis ◽

Coastal Marine ◽

Past Half Century ◽

Southern Right Whales ◽

Inshore Waters

AbstractIn South-western Atlantic waters, individuals of the southern right whale (SRW) Eubalaena australis spend part of the year (the austral winter and spring) in northern inshore waters where they breed and then migrate to southern feeding grounds during the summer. Mar del Plata (MDP) is located between two main reproductive areas (Península Valdés-Argentina and Santa Catarina-Brazil). The purpose of the present study is to report the presence of SRWs on their journey off the coast of MDP based on sighting records during the past half century. We carried out whale observations through systematic weekly coastal marine mammal surveys in different points of the MDP area from 1966 to 2016. The first SRW sighting was recorded in 1970; since then, sighting frequency has gradually increased, reaching a peak of 28 sightings (N = 63 whales) in 2016. These are unique long-term sighting records of SRWs in Argentina and the first on their journey off the shores of Buenos Aires province. We expect that these results will help local authorities to regulate tourism and other activities in the area and thereby contribute to the conservation of the species.

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