scholarly journals Occurrence of southern right whales (Eubalaena australis) along southeastern Brazil

2020 ◽  
pp. 153-156
Author(s):  
Marcos César De Oliveira Santo ◽  
Salvatore Siciliano ◽  
Shirley Pacheco de Souza ◽  
Jose Luis Altmayer Pizzorno
Keyword(s):  
Southeastern Brazil ◽  
Incidental Capture ◽  
Right Whale ◽  
Eubalaena Australis ◽  
Right Whales ◽  
Southern Right Whales

This paper reports on the occurrence of southern right whales (Eubalaena australis) in southeastern Brazilian waters (18°S-25°S), withevidence of their use of the region as an important calving area. Only in recent years have right whale sightings and strandings been reportedregularly within the surveyed area. Of 71 distinct sightings reported since 1936, 39 (54.9%) were mother-calf pairs observed close to theshore. Most of these sightings (91.5%) were reported from early July to late October. Eight confirmed strandings of this species wereobserved within the surveyed area, six of which were between July and October. Stranded calves represented 62.5% of these records. Twocalves showed evidence of incidental capture. The increasing number of sightings, and recent reports of stranded calves and one adultfemale could be indicative of an increase in cetacean research efforts in the region. However, it also suggests use of the southeasternBrazilian coast as an important right whale calving area.

scholarly journals Stranding events of southern right whales, Eubalaena australis, in southern Brazil

2020 ◽  
pp. 157-160
Author(s):  
Antonio B. Greig ◽  
Eduardo R. Secchi ◽  
Alexandre N. Zerbini ◽  
Luciano Dalla Rosa
Keyword(s):  
Storm Surges ◽  
Anthropogenic Factors ◽  
Brazilian Coast ◽  
Illegal Hunting ◽  
Right Whale ◽  
Eubalaena Australis ◽  
Marine Traffic ◽  
Right Whales ◽  
Southern Right Whales ◽  
The Right

Although international protection has been granted since 1935, southern right whales have only recently shown signs of recovery, possiblydue to anthropogenic factors. Off Brazil, illegal hunting of right whales occurred until 1973. This paper reports on surveys conducted alongthe southern Brazilian coast and the information recovered on right whale strandings for this area from 1977-1995. In the first 10 years ofthis period only four cases were registered. However, in contrast, 20 cases were counted during the last nine years. These results arediscussed in relation to marine traffic and the fisheries in the area that produce risks of collision and entanglement. Further, the possibilityof storm surges being a preponderant factor in the mortalities in this area is presented. These yearly rates are compared with neighbouringareas that are also inhabited by the right whales. Both possibilities fit the hypothesis that the right whales using the Brazilian coast forbreeding may finally be showing signs of recovery.

Southern right whales (Eubalaena australis) off Torres, Brazil: group characteristics, movements, and insights into the role of the Brazilian-Uruguayan wintering ground

Mammalia ◽  
2017 ◽  
Vol 81 (3) ◽  
Author(s):  
Daniel Danilewicz ◽  
Ignacio B. Moreno ◽  
Maurício Tavares ◽  
Federico Sucunza
Keyword(s):  
Right Whale ◽  
Eubalaena Australis ◽  
Right Whales ◽  
Southern Right Whales ◽  
Group Characteristics ◽  
Wintering Ground

AbstractThe southern right whale (SRW),

Humpback whales Megaptera novaeangliae and southern right whales Eubalaena australis in Gerlache Strait, Antarctica

Polar Record ◽  
1988 ◽  
Vol 24 (148) ◽  
pp. 15-20 ◽  
Author(s):  
Gregory S. Stone ◽  
William M. Hamner
Keyword(s):  
Open Water ◽  
Euphausia Superba ◽  
Megaptera Novaeangliae ◽  
Humpback Whales ◽  
Southern Limit ◽  
Right Whale ◽  
Eubalaena Australis ◽  
Right Whales ◽  
Southern Right Whales ◽  
The Right

AbstractDuring surveys conducted 2–20 April 1986 in Gerlache Strait, Antarctic Peninsula, 103 humpback whales Megaptera novaeangliae and eight right whales Eubalaena australis were sighted. The right whale sightings extend the southern limit of known distribution for the species. Humpback and right whale densities were respectively 0.22 (sd 0.23) and 0.01 (sd 0.06) whales per survey mile. Highest densities for both species were recorded inside bays, rather than in the relatively open water of Gerlache Strait. Both species were feeding on Antarctic krill Euphausia superba. Twenty-three humpback and four right whales were identified individually using photographs of natural features. Also included are sighting records of 18 southern bottlenose whales Hyperoodon planifrons.

scholarly journals Population estimate and rate of increase of southern right whales Eubalaena australis in southeastern Australia

2020 ◽  
Vol 41 ◽  
pp. 373-383
Author(s):  
K Stamation ◽  
M Watson ◽  
P Moloney ◽  
C Charlton ◽  
J Bannister
Keyword(s):  
South Australia ◽  
Population Estimate ◽  
Abundance Estimate ◽  
Right Whale ◽  
Eubalaena Australis ◽  
Southeastern Australia ◽  
Rate Of Increase ◽  
Right Whales ◽  
Southern Right Whales ◽  
Australian Coastline

In Australian waters, southern right whales Eubalaena australis form 2 genetically distinct populations that have shown contrasting patterns of recovery since whaling ceased: a western population in South Australia and Western Australia and an eastern population in southeastern Australia (Tasmania, Victoria and New South Wales). Here, we provide an abundance estimate derived from a breeding female superpopulation mark-recapture model for the southeastern southern right whale population. The population comprises 268 individuals (68 breeding females) and has increased at a rate of 4.7% per annum between 1996 and 2017. There has been no significant change in the annual abundance of mother-calf pairs sighted at the only calving ground (Logans Beach in Victoria) over the last 3 decades. The total number of southern right whales (i.e. all adults and calves) using the southeastern Australian coastline has increased by 7% since 1985. Unlike the population estimate (which was restricted to breeding females sighted prior to the post-breeding southward migration), this estimate is likely to include transiting whales from the southwestern population. The theoretical population model predicts 19 breeding females at Logans Beach in 2018 and 28 in 2028; the actual number of breeding females, as of 2018, is 14. This study provides the first complete estimate of population size and rate of increase of southern right whales along the southeastern Australian coastline. This knowledge is critical for assessing population status and recovery of southern right whales in Australia. It provides a basis for monitoring persistence and responses of the population to environmental stressors.

Southern Right Whale Eubalaena australis sightings on the Australian coast and the increasing potential for entanglement

2003 ◽  
Vol 9 (3) ◽  
pp. 228 ◽  
Author(s):  
Simon Allen ◽  
Lars Bejder
Keyword(s):  
North Atlantic ◽  
Coastal Development ◽  
Eubalaena Glacialis ◽  
Precautionary Approach ◽  
Right Whale ◽  
Eubalaena Australis ◽  
Right Whales ◽  
North Atlantic Right Whales ◽  
Southern Right Whales ◽  
Development Applications

Southern Right Whales Eubalaena australis are an endangered species that have been recovering from unsustainable whaling practices and, despite being reported along the east and west coasts of Australia, they have not been duly accounted for in recent risk assessments for marine development. This review of the last decade of sightings highlights northerly movements into temperate and sub-tropical waters, indicates that fatal entanglement has occurred and points toward an increasing likelihood of interactions between migrating whales and inshore marine development. Given that entanglements and vessel strike are preventing the recovery of North Atlantic Right Whales Eubalaena glacialis, we recommend a precautionary approach to risk assessment around Australia and the formation of a national animal entanglement committee with both a pre-emptive role in assessing coastal development applications and a reactive role in the event of entanglement.

scholarly journals Changing patterns of habitat use by southern right whales (Eubalaena australis) on their nursery ground at Península Valdés, Argentina, and in their long-range movements

2020 ◽  
pp. 133-143
Author(s):  
Victoria J. Rowntree ◽  
Roger S. Payne ◽  
Donald M. Schell
Keyword(s):  
Habitat Use ◽  
Nitrogen Isotope ◽  
Isotope Ratios ◽  
Small Scale ◽  
Nursery Ground ◽  
Adult Males ◽  
Human Disturbances ◽  
Eubalaena Australis ◽  
Right Whales ◽  
Southern Right Whales

Southern right whales (Eubalaena australis) have been studied on their nursery ground at Península Valdés, Argentina, every year since 1970. Since 1990, 1,208 individuals have been identified from photographs taken during annual aerial surveys; 618 whales were seen in two or more years. Patterns of habitat use have changed during the study in ways which suggest that right whales may be capable of substantial behavioral and ecological flexibility. One male and three females from Península Valdés have been sighted on other nursery grounds (Tristan da Cunha and southern Brazil). Three individuals from Península Valdés were sighted on feeding grounds off Shag Rocks and South Georgia. Some right whales from Península Valdés showed carbon and nitrogen isotope ratios very similar to those seen in right whales off South Africa, while others showed distinctive isotope ratios indicating that they fed in a different area. Whales of all ages and both sexes moved frequently between three major regions of concentration on the Península Valdés nursery ground. Subadults and adult females with calves were resighted at higher rates than adult males and females in non-calf years. Changes in the geographic distribution of whales at the Península include: (1) abandonment of a major region of concentration; (2) establishment of a nursery area adjacent to thecentre of a growing whalewatching industry; and (3) small-scale shifts in distribution, possibly in response to natural and human disturbances.

Southern right whales ( Eubalaena australis ) return to a former wintering calving ground: Fowlers Bay, South Australia

2019 ◽  
Vol 35 (4) ◽  
pp. 1438-1462
Author(s):  
Claire Charlton ◽  
Rhianne Ward ◽  
Robert D. McCauley ◽  
Robert L. Brownell ◽  
Sacha Guggenheimer ◽  
...  
Keyword(s):  
South Australia ◽  
Eubalaena Australis ◽  
Right Whales ◽  
Southern Right Whales
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