scholarly journals Migratory Movements of Pygmy Blue Whales (Balaenoptera musculus brevicauda) between Australia and Indonesia as Revealed by Satellite Telemetry

PLoS ONE ◽  
2014 ◽  
Vol 9 (4) ◽  
pp. e93578 ◽  
Author(s):  
Michael C. Double ◽  
Virginia Andrews-Goff ◽  
K. Curt S. Jenner ◽  
Micheline-Nicole Jenner ◽  
Sarah M. Laverick ◽  
...  
Keyword(s):  
Satellite Telemetry ◽  
Balaenoptera Musculus ◽  
Migratory Movements ◽  
Blue Whales

Opportunistic sightings of blue whales off Sydney, Australia

2021 ◽  
Author(s):  
Vanessa Pirotta ◽  
Robert Harcourt
Keyword(s):  
Marine Mammals ◽  
New South ◽  
Short Note ◽  
Balaenoptera Musculus ◽  
Blue Whale ◽  
South Wales ◽  
Tasman Sea ◽  
Migratory Movements ◽  
The Antarctic ◽  
Blue Whales

ABSTRACT Two subspecies of blue whale occur in Australian waters, (1) the pygmy blue whale (Balaenoptera musculus brevicauda) and (2) the Antarctic blue whale (Balaenoptera musculus intermedia). Understanding blue whale presence in Australian waters is critical to ensuring Australia’s protection of these marine mammals as both subspecies were heavily exploited during historical whaling. This short note documents pygmy blue whale sightings in New South Wales waters over the last 18 years. Observations were opportunistically made via citizen science and verified by scientists. Sightings in this note contribute to our limited knowledge of pygmy blue whale distribution along the east coast of Australia and may help understand the migratory movements of New Zealand pygmy blue whales off Australia and in the Tasman Sea. Overall, information presented in this note contributes to Australia’s national and international conservation efforts to protecting blue whales as a migratory and threatened species.

scholarly journals Blue whales (Balaenoptera musculus) optimize foraging efficiency by balancing oxygen use and energy gain as a function of prey density

2015 ◽  
Vol 1 (9) ◽  
pp. e1500469 ◽  
Author(s):  
Elliott Lee Hazen ◽  
Ari Seth Friedlaender ◽  
Jeremy Arthur Goldbogen
Keyword(s):  
Energy Intake ◽  
Prey Density ◽  
Prey Capture ◽  
Energy Gain ◽  
Foraging Strategies ◽  
Foraging Efficiency ◽  
Energetic Efficiency ◽  
Breath Hold ◽  
Balaenoptera Musculus ◽  
Blue Whales

Terrestrial predators can modulate the energy used for prey capture to maximize efficiency, but diving animals face the conflicting metabolic demands of energy intake and the minimization of oxygen depletion during a breath hold. It is thought that diving predators optimize their foraging success when oxygen use and energy gain act as competing currencies, but this hypothesis has not been rigorously tested because it has been difficult to measure the quality of prey that is targeted by free-ranging animals. We used high-resolution multisensor digital tags attached to foraging blue whales (Balaenoptera musculus) with concurrent acoustic prey measurements to quantify foraging performance across depth and prey density gradients. We parameterized two competing physiological models to estimate energy gain and expenditure based on foraging decisions. Our analyses show that at low prey densities, blue whale feeding rates and energy intake were low to minimize oxygen use, but at higher prey densities feeding frequency increased to maximize energy intake. Contrary to previous paradigms, we demonstrate that blue whales are not indiscriminate grazers but instead switch foraging strategies in response to variation in prey density and depth to maximize energetic efficiency.

scholarly journals From conservation genetics to conservation genomics: a genome-wide assessment of blue whales ( Balaenoptera musculus ) in Australian feeding aggregations

2018 ◽  
Vol 5 (1) ◽  
pp. 170925 ◽  
Author(s):  
Catherine R. M. Attard ◽  
Luciano B. Beheregaray ◽  
Jonathan Sandoval-Castillo ◽  
K. Curt S. Jenner ◽  
Peter C. Gill ◽  
...  
Keyword(s):  
Population Structure ◽  
Adaptive Divergence ◽  
Balaenoptera Musculus ◽  
Blue Whale ◽  
Conservation Genomics ◽  
Next Generation Sequencing Technology ◽  
Genome Wide ◽  
A Genome ◽  
Wide Range ◽  
Blue Whales

Genetic datasets of tens of markers have been superseded through next-generation sequencing technology with genome-wide datasets of thousands of markers. Genomic datasets improve our power to detect low population structure and identify adaptive divergence. The increased population-level knowledge can inform the conservation management of endangered species, such as the blue whale ( Balaenoptera musculus ). In Australia, there are two known feeding aggregations of the pygmy blue whale ( B. m. brevicauda ) which have shown no evidence of genetic structure based on a small dataset of 10 microsatellites and mtDNA. Here, we develop and implement a high-resolution dataset of 8294 genome-wide filtered single nucleotide polymorphisms, the first of its kind for blue whales. We use these data to assess whether the Australian feeding aggregations constitute one population and to test for the first time whether there is adaptive divergence between the feeding aggregations. We found no evidence of neutral population structure and negligible evidence of adaptive divergence. We propose that individuals likely travel widely between feeding areas and to breeding areas, which would require them to be adapted to a wide range of environmental conditions. This has important implications for their conservation as this blue whale population is likely vulnerable to a range of anthropogenic threats both off Australia and elsewhere.

scholarly journals Coastal, offshore, and migratory movements of South African right whales revealed by satellite telemetry

2010 ◽  
Vol 27 (3) ◽  
pp. 455-476 ◽  
Author(s):  
B. R. Mate ◽  
P. B. Best ◽  
B. A. Lagerquist ◽  
M. H. Winsor
Keyword(s):  
South African ◽  
Satellite Telemetry ◽  
Right Whales ◽  
Migratory Movements

Genetic diversity and structure of blue whales (Balaenoptera musculus) in Australian feeding aggregations

2010 ◽  
Vol 11 (6) ◽  
pp. 2437-2441 ◽  
Author(s):  
Catherine R. M. Attard ◽  
Luciano B. Beheregaray ◽  
Curt Jenner ◽  
Peter Gill ◽  
Micheline Jenner ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Balaenoptera Musculus ◽  
Genetic Diversity And Structure ◽  
Blue Whales

scholarly journals A preliminary investigation into the ecology and behavior of blue whales (Balaenoptera musculus) in the Gulf of Corcovado, Chile

2014 ◽  
Author(s):  
Alessandro Bocconcelli ◽  
Leigh S. Hickmott ◽  
Rafaela Landea Briones ◽  
Gloria Howes ◽  
Laela S. Sayigh
Keyword(s):  
Preliminary Investigation ◽  
Balaenoptera Musculus ◽  
And Behavior ◽  
Blue Whales

scholarly journals Survival of adult blue whales Balaenoptera musculus in the Gulf of St. Lawrence, Canada

2006 ◽  
Vol 319 ◽  
pp. 287-295 ◽  
Author(s):  
C Ramp ◽  
M Bérubé ◽  
W Hagen ◽  
R Sears
Keyword(s):  
Balaenoptera Musculus ◽  
Blue Whales

scholarly journals Occurrence of blue whales (Balaenoptera musculus) in offshore waters of southeastern Brazil

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Alessandra Rocha ◽  
Camila Marchetto ◽  
Luiza Pacheco ◽  
Eduardo Resende Secchi
Keyword(s):  
Southeastern Brazil ◽  
Balaenoptera Musculus ◽  
Blue Whales
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