Tag

Blue Whales

All articles tagged with #blue whales

science22 days ago•6 min saved

Underwater Heart Flex: How Blue Whales Lunge for Prey

Five blue whales and four humpbacks were tagged to measure heart rates during lunge-feeding; results show heart rates rise to about 21.9 bpm (blue whales) and 28.2 bpm (humpbacks) during lunges and then slowly fall between lunges, indicating a mix of anaerobic energy and rapid recovery that enables feeding while conserving oxygen. Resting rates were as low as 18.5 bpm, highlighting a shared metabolic pattern and potential health indicators for whales amid changing prey and noise pollution.

via ScienceAlert|

#blue-whales #foraging #heart-rate

science1 year ago•6 min saved

Orcas Conduct Macabre Drowning Training Session

First footage shows orca mothers teaching their young to pretend-drown each other as part of hunting practice, which they later apply in hunting blue whales, highlighting complex social and hunting behaviors in orcas, filmed off Western Australia for a BBC series narrated by Sir David Attenborough.

via Live Science|

#bbc-documentary #blue-whales #marine-mammals

nature2 years ago•17 min saved

"Earth's 32 Loudest Animals Revealed"

The article explores 32 of the loudest animals on Earth, ranging from the blue whale, which can emit calls up to 188 decibels, to the tiny African cicada, whose mating call reaches 107 decibels. It highlights the diverse ways these animals use their loud calls for communication, mating, and hunting, and includes fascinating details about each species' unique vocalizations and behaviors.

via Livescience.com|

#blue-whales #cicadas #lions

nature2 years ago•2 min saved

"Spectacular Race: Rare Photos Capture Ocean Giants' Behavior in Australia"

Rare photos captured a "spectacular" event of blue whales engaging in "racing behavior" off the southern coast of Australia, where a female blue whale was pursued by two competing males in a high-speed chase. The behavior, observed by Peter Gill of the Blue Whale Study, is believed to be linked to mating as the whales prepare to migrate away from Australian feeding grounds. The event showcased the massive power and grace of these ocean giants, providing a unique insight into their behavior and social dynamics.

via AOL|

#australia #blue-whales #marine-conservation

science-and-nature2 years ago•3 min saved

"Unexpected Hybridization: Blue Whales Found to Mate with Another Species"

New research reveals that North Atlantic blue whales have around 3.5 percent of their DNA from fin whales, indicating interspecies mating. While most hybrid animals are infertile, whales in the rorqual group, including fin and blue whales, have genetic features that allow for successful hybridization. Concerns arise about the potential impact on genetic diversity and resilience to environmental changes, prompting the need for informed conservation strategies for these iconic species.

via ScienceAlert|

#blue-whales #conservation #fin-whales

science2 years ago•4 min saved

"Surprising Discovery: Blue Whales Found to Have Hybrid Offspring with Other Species"

A study reveals that Atlantic blue whales have a surprising amount of fin whale DNA in their genomes, indicating that the two species have been mating and producing viable hybrid offspring. The findings suggest that these hybrids are capable of reproducing, contrary to previous beliefs. While the genetic diversity and gene flow among the North Atlantic blue whale population are positive signs for their resilience, the potential impact of introgression on the whales' ability to adapt to environmental challenges, such as human-induced climate change, raises concerns for conservation efforts.

via Livescience.com|

#atlantic-ocean #blue-whales #conservation

environment2 years ago•3 min saved

"World's Largest Animal, Blue Whales, Rediscovered in Seychelles: A Triumph Over Decades of Whaling"

Blue whales, the largest animals on Earth, are making a comeback in the Seychelles after being wiped out by Soviet hunters. Researchers detected the presence of blue whales in the area, suggesting they could be breeding there. The species, once prolific in the Indian Ocean, was heavily hunted in the 20th century, resulting in a significant decline in their population. However, conservation efforts and a ban on whaling have led to an increase in their numbers. The return of blue whales to the Seychelles is seen as a conservation success.

via Metro.co.uk|

#blue-whales #conservation #endangered-species

environment2 years ago•2 min saved

Whaling's Impact on Genetic Diversity Revealed in Study

A study from Oregon State University has found that commercial whaling in the 20th century has led to a loss of genetic diversity in surviving whale populations, specifically the maternal lineage of blue and humpback whales. Researchers compared DNA from whale bones found near abandoned whaling stations to present-day whales and discovered a significant decline in maternal DNA lineages. The loss of these lineages may result in the disappearance of cultural knowledge passed down through generations. While whales have started to return to the region since the end of commercial whaling, the long-term effects may still be felt as some whales alive today may have experienced the whaling era. Continued monitoring and conservation efforts are necessary to ensure the recovery and preservation of these populations.

via TheInertia.com|

#blue-whales #conservation #environment