FEB 25, 2019 6:44 PM PST

Blue Whales 'Remember' Prey Hotspots, and That Could be Bad

WRITTEN BY: Anthony Bouchard

Understanding the complex patterns that exist between predators and their prey isn’t always easy, especially in the realm of marine wildlife in which animal subjects spend most of their time concealed beneath the veil of the ocean’s surface. But that hasn’t stopped a curious team of researchers from making strides in learning more about prey discovery in blue whales.

A blue whale.

Image Credit: Oregon State University

After analyzing more than a decade’s worth of tagging data and cross-referencing it with oceanic satellite data, the researchers found that blue whales are more likely to rely on their memory of previous successful feeding zones as than they are to dynamically track active prey hotspots during migration. The findings are scheduled to be published next week in the journal Proceedings of the National Academy of Sciences (PNAS).

Predatory patterns of this nature are already known to exist in a bevy of migratory land animals like caribou and wildebeests, but it’s almost unheard of for researchers to be able to associate these characteristics with marine animals, especially one as massive as the blue whale.

"We know that many species that migrate on land, from caribou in the Arctic to wildebeests in the Serengeti, enhance their survival by carefully adjusting the pace and timing of their migrations to find food as it becomes seasonally available along the way, rather than just migrating to get from point A to point B," explained Briana Abrahms, the paper’s lead author.

"These long-lived, highly intelligent animals are making movement decisions based on their expectations of where and when food will be available during their migrations," she continued.

Related: Have you ever wondered how the blue whale became so large?

Given just how large a blue whale can become, it’d be an understatement to claim that their memory-centric predatory habits work well for them. On the other hand, these habits could have drastic consequences if climate change continues to rear its ugly head and change the natural order of our oceans.

More specifically, warming oceans could alter the dynamics of prey availability in certain regions and consequently impact the blue whale’s aptitude for finding food as they travel their typical migration route. This concerning thought has implications for the blue whale because their remembrance of previously-successful feeding zones would be rendered obsolete if prey relocated to cooler waters.

"There is still a lot we don't know about blue whales, but it is apparent that they have strong fidelity to certain sites along the West Coast of the United States, which they use year after year," added Bruce Mate, a co-author of the paper.

Related: A specific group of California-centric fin whales stays there year-round

The study underscores the importance of studying climate change’s impact on the ocean, as it could eventually trickle down to the blue whale and impact the species’ ability to find its prey. Moreover, it could help researchers identify whether the blue whale will be a candidate for conservation measures before it’s too late.

Source: EurekAlert, PNAS

About the Author
  • Fascinated by scientific discoveries and media, Anthony found his way here at LabRoots, where he would be able to dabble in the two. Anthony is a technology junkie that has vast experience in computer systems and automobile mechanics, as opposite as those sound.
You May Also Like
MAY 12, 2020
Plants & Animals
It's Not a Choice - Cats Need Meat
MAY 12, 2020
It's Not a Choice - Cats Need Meat
While you or I might have the freedom of deciding between a carnivorous diet or going all out vegetarian, not all a ...
MAY 20, 2020
Chemistry & Physics
Do cats or dogs better survive venomous snakebites?
MAY 20, 2020
Do cats or dogs better survive venomous snakebites?
Who do you think could better battle off a venomous snakebite - a dog or a cat? New research from the University of Quee ...
MAY 26, 2020
Microbiology
Rabbits in North America are Threatened by a Deadly Virus
MAY 26, 2020
Rabbits in North America are Threatened by a Deadly Virus
A deadly virus has been spreading among the wild rabbit populations of the southwestern United States. This devastating ...
JUN 16, 2020
Earth & The Environment
How do Microplastics Reach the Deep Seafloor?
JUN 16, 2020
How do Microplastics Reach the Deep Seafloor?
Plastics and microplastics are certainly not recent developments in ocean pollution. However, scientists continue to inv ...
JUN 28, 2020
Genetics & Genomics
Low-Level Chemical Exposure Causes Heritable Changes in Fish
JUN 28, 2020
Low-Level Chemical Exposure Causes Heritable Changes in Fish
Scientists used a fish called the inland silverside, Menidia beryllina, to show that even small amounts of chemicals tha ...
JUN 26, 2020
Earth & The Environment
Another 2020 plague: locusts
JUN 26, 2020
Another 2020 plague: locusts
2020 is determined to be a year to remember. On top of the global COVID-19 pandemic, the worst locust outbreak seen in o ...
Loading Comments...