Blog Tags: Sperm Whales
On this hump day, a few cetaceous stories for your perusal:
As you've probably heard, the team behind Sunday’s Oscar-winning documentary “The Cove” exposed Santa Monica sushi restaurant The Hump for serving illegal whale meat. The possession or sale of marine mammals -- in this case, the endangered sei whale -- is a violation of the Marine Mammal Protection Act, and can lead to a year in prison and a fine of $20,000.
And on the brighter side, the BBC has a remarkable slideshow of images showing a sperm whale surface feeding off the coast of New Zealand. Surface feeding is uncommon for sperm whales, who usually hunt many meters below the sea’s surface -- this individual must have been pretty hungry.
The researchers have evidence of the whales staying together over several months in the Gulf of Mexico. And their behavior varied with each deep dive, indicating that they alternate roles to spread out the physiological demand of the 1,000-meter dives.
One researcher said that the some whales appeared to guard the bottom of a squid bait ball, while others took advantage of the center of the ball.
Other research has suggested dolphins may exhibit herding behavior, but this is the first evidence in sperm whales; some scientists remain skeptical.
Just remember, whales: there is no "I" in "team."
Don't you hate when you're at a party or restaurant, and even without music on, the room grows louder and louder and louder? Until you can barely hear the person standing right next to you? New research shows that sperm whales have evolved to circumvent this cocktail party conundrum.
According to the scientists, whose work will be presented at the Acoustical Society of America next week, the whales are polite conversationalists -- they make a specific effort to keep their calls from overlapping by changing the intervals between their echolocating clicks.
Perhaps humans can try this. It might go something like this:
"Would you - click - like an hors d'oeuvre - click?"
"Yes, one - click - mushroom puff - click - please."
And in other acoustic findings, researchers have discovered the first known instances of male humpback whales singing to one another, similar to songbirds. Whether the whale songs are macho seduction tunes -- like male birdsongs -- is still unclear.
What is clear is that there's a lot we don't know about what's being said and sung under the sea.
Sperm whales are named for the waxy oil in their head, spermaceti. Used in many industries ranging from cosmetics to automotive, spermaceti drove whalers to target sperm whales and they are now listed as threatened by the International Union for Conservation of Nature and Natural Resources. Due to their size, however, sperm whales have been known to fight back, famously attacking and sinking the whaling ship, Essex, the ship Moby Dick is based upon. Learn more about these large predators and other animals in the Creature Corner.
When I usually read about theft and the sea, I think of overfishing and depleted natural resources. But this time around, it is a hungry predator taking advantage. Check out this video on National Geographic Kids and get ready for a surprise around the 35 second mark. One particularly smart sperm whale has learned how to shake fish free of lines without injury. Perhaps if he had enough food in the open sea, he wouldn’t have to resort to such tactics.
- Sharks and Rays Gain International Protection under CITES Listing Posted Sun, September 14, 2014
- Ocean Roundup: Healthy Corals Mean More Sharks, Extinct Dolphin Found in Peruvian Desert, and More Posted Thu, September 11, 2014
- Ocean Roundup: Shark-Eating Dinosaur Fossils Discovered, Germany Paving Way for Cheaper Wind Energy, and More Posted Mon, September 15, 2014
- Oceana Magazine: DiCaprio Funds Conservation Across the Entire Eastern Pacific Posted Thu, September 11, 2014
- Ocean Roundup: Leatherback Coloration May Play Important Role, UK Sees New Voluntary Seafood Labeling Scheme, and More Posted Wed, September 17, 2014