Blog Tags: Baleen Whales
In June, researchers found that whale poo is highly beneficial to marine ecosystems in the Southern Ocean since it is rich in iron. Now, new findings show that whales’ contribution to the sea goes far beyond just their excrements.
The 2013 International Consumer Electronics Show (CES) took place over the weekend, but one new high-tech babysitter was not featured in Las Vegas. The Woods Hole Oceanographic Institute has developed underwater robots to find, track, and protect baleen whales in the Gulf of Maine, particularly the highly endangered North Atlantic Right Whale.
Between mid-November and early-December, the torpedo-shaped gliders located nine right whales, empowering regulators to institute a voluntary speed restriction in the area to decrease the threat of boat strikes. This represents the first time an autonomous vehicle has successfully detected and reported the location of baleen whales.
Right whales were one of the first species to be dramatically affected by commercial whaling, and remain one of the most critically endangered species of whales, with less than 400 individuals in the North Atlantic population. While whales can get caught as bycatch in commercial fisheries, run-ins with ships account for one third of all right whale deaths, so the ability to warn boats of their proximity is an important component of their continued protection.
Today’s FOTD is about the humpback whale. These giants grow up to 50 feet long and weigh up to 40 tons. They are highly migratory and spend their summers feeding in the nutrient-rich polar waters and travel to tropical waters to breed.
There is little food for humpbacks in the warm waters of the tropics so they essentially live off their fat reserves, which they build up during their summers in the polar waters.
An Australian paleobiologist has made a curious discovery about the origins of baleen whales. Studying the 25-million-year-old fossil of a primitive toothed baleen whale, Mammalodon colliveri, Dr. Erich Fitzgerald hypothesized that the early whale used its tongue and short, blunt snout to suck small prey from sand and mud on the seafloor. Yummy.
Fitzgerald’s work supports Darwin's notion that some of the earliest baleen whales may have been mudsuckers before they were filter-feeders.
And apparently the three-meter-long Mammalodon was actually a dwarf, though its name brings to mind its relative, the blue whale -- the largest animall in the history of the world.
As Dr. Fitzgerald said, “Clearly the seas off southern Australia were a cradle for the evolution of a variety of tiny, weird whales that seem to have lived nowhere else.”
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