A study on blue whales

The twin blowholes on the top of its head are clearly visible. The whale curves its back and dives, showing its sickle-shaped dorsal fin as it slides silently below the surface. The nearest is only 20 metres away.

A study on blue whales

When Daniel DeLeon's mother, Betty, first met his father, Narciso, on a church trip in San Blas, Mexico, she didn't speak Spanish and he didn't speak English, so they communicated in a different way - with music. It's no surprise Daniel, now a year-old student at California Polytechnic State University, grew up with an ear for music himself.

In physics class I learned how sound waves propagate into our ear. Those waves create emotions that make us happy, that get us pumped up.

His musical background paired with a newfound understanding of acoustics landed him a highly competitive internship at the Monterey Bay Aquarium Research Institute MBARIwhere he helped scientists Danelle Cline and John Ryan study the ocean by listening to whale calls.

The whales are using acoustics to understand each other, just like my parents did when they first met. It made me think about their music and how important it was. Daniel DeLeon By tracking the calls of endangered blue and fin whales and their changing migration patterns, scientists can learn a lot about the broader implications of human influence on marine life.

But the task ahead of Daniel was a little more complicated than just listening. But you dive down 23 meters, 99 percent of light is gone. In contrast, sound travels thousands of miles. So marine mammals use sound for all of their essential life activities.

Rorquals / ˈ r ɔːr k w əl / (Balaenopteridae) are the largest group of baleen whales, a family with nine extant species in two ashio-midori.com include what is believed to be the largest animal that has ever lived, the blue whale, which can reach tonnes ( short tons), and the fin whale, which reaches tonnes ( short tons); even the smallest of the group, the northern minke whale. The blue whale is the largest animal in the history of the world. It can grow to a length of feet and tons. It can grow to a length of feet and tons. It has a long, blue-gray body. Frequently Asked Questions: For a comprehensive list of Frequently Asked Questions related to The Cove visit the OPS FAQ Page and the Dolphin Project FAQ. What Fish to Enjoy Safely Click here for a list of fish to enjoy safely and to see which fish are highest in mercury. Study Guide Download the study .

Just by listening we learn a lot about their lives. John Ryan, Biological Oceanographer In recording sound around the clock, the hydrophone presents scientists with a dilemma: It would take a dozen lifetimes to thoroughly analyze every bit of recorded audio.

A study on blue whales

Blue and fin whales are some of the loudest animals on earth. Their low-frequency calls can travel across long stretches of ocean, making them excellent candidates for study. The sound waves recorded by the hydrophone have to be converted into visual data in the form of a spectrogram, a map of sound over time.

Daniel feeds those spectrograms into the TensorFlow model to teach it what both blue and fin whale calls look like.

Like a puppy being house-trained, machine learning models learn by repetition. The more examples Daniel feeds into it, the more accurate the model becomes. All told, Daniel trained the TensorFlow model with over 18, examples of isolated whale calls. Machine learning is just getting the computer to be able to pick up patterns.

5 Facts About Whaling That Will Shock You - One Green PlanetOne Green Planet

The model can differentiate between a blue whale and a fin whale, help confirm what time of day each call happened, how loud it was, and how long it lasted. Your browser does not support the audio element. Blue Whale Your browser does not support the audio element.

I never thought about being a scientist. My curiosity for the world, for the universe in general, fed the fire [in me] to give it a shot. The best part about creating technology is seeing what the world does with it:Killer whales, or Orcas (Orcinus orca) are ashio-midori.com are the largest dolphins in the world, called 'whales' because of their size.

Orcas have mostly black skin with white ashio-midori.com are found in all the world's oceans, from the cold of the Arctic to the tropical seas. They are easy to identify because of their distinctive white and black colouring.

They live in pod. Whaling is a brutal and bloody business, and although there has been strong opposition to it from millions of people around the world, Japan, Norway, and Iceland continue to hunt and kill these.

Cetacean Evolution: The Evolution of Whales, Adapted from National Geographic, November

Visit the post for more. Home; Science of Sound. Sound. What is sound? How do you characterize sounds? Amplitude (Intensity). Blue Whales The Blue whale is the largest creature of the sea; in fact, it’s the largest creature known to man.

Contrary to what most people think, even though Blue whales live in the sea, they are mammals. In a study directly observing blue whale behaviors with cargo ships – the first of its kind – it appears they have not yet developed an evasive response to this particularly modern threat.

Scientists used GPS and dive-logging equipment attached to blue whales to track them, and cross-referenced the . Whereas many larger whales, such as sperm, humpback and blue whales, lift their tails clear of the surface as they dive, Bryde’s whales never do.

Having surfaced and blown, a whale usually slides its head beneath the water before exposing its dorsal fin, arching its back and disappearing beneath the surface. DOC’s Bryde’s whale study.

Study: Blue Whales ‘Play Dead;’ Unable to Avoid Ships | Kemplon Engineering