Archive for the “Science News” Category

I read an article about researchers in Japan who created a prototype of a dolphin speaker that projects dolphin communication sounds, whistles, pulse sounds and echolocation clicks to gain insights into how dolphins communicate.  Yuka Mishima, a graduate student at Tokyo University of Marine Science and Technology, along with university colleagues and collaborators at Fusion Inc. will present their research at the Acoustics 2012 meeting in Hong Kong. Dolphins can hear and produce sounds of up to 150 kHz in frequency, which are too high for humans to hear. This project will give us better understanding of the dolphins’ communication and detection skills. Their goal was to develop a dolphin speaker that could project the full range of all of the sounds dolphins make. Once the dolphin speaker is completed it will enable them to playback a variety of dolphin sounds to dolphins, which will help to broaden the research of their acoustic abilities.

What do you think about this?
What can we learn from studying dolphin acoustic communications?
What other sea animals can we build speakers for?

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I read this article about Striped Dolphin that can be found in Atlantic and Pacific oceans. This species have a unique look to them that is very interesting to us, they feature long strips of dark blue on their lighter colored blue bodies. A striped dolphin can be easily identified by the long bluish-gray stripe that runs along each side of their body. It also has smaller narrow dark stripes on each side. There are plenty of different colors too including shades of gray, brown and many more colors, these are absolutely gorgeous dolphins that people love to look at. : )! I read too that this species don't like to the cold water because stripes dolphins want to live only in the warm waters and they like a tropical waters, they characterized their long and narrow beak, they can swim very fast and are quite the acrobats. The exciting about this Dolphins that they often breaching, pinning and flipping out of the water, often upside down, and I read that dolphin can rotate their tail energetically before reentering the water, people called this a "Roto-TaiLing".

 

Do you think this species is dangerous?

 

What do you like about this species?

http://www.dolphins-world.com/Striped_Dolphin.html

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In this article a orca was spotted in the Pacific Ocean off Russia, and the thing that makes this news worthy is that it was a fully white orca.There has been two other white orcas have been seen in area, but that this one that they have spotted is the first fully grown male. They have decided to call him Iceberg, because he is fully white. It is said that researchers will return to the sight where they spotted Iceberg in hope to find out if it is an albino or if there is some other reason for his white color.

Why do you think Iceberg is white?

Do you think that the researchers will be able to fine Iceberg again?

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File:Bottlenose Dolphin KSC04pd0178.jpg

I just read an article about a massive dolphin die off here. http://www.scientificamerican.com/article.cfm?id=massive-dolphin-die-off-in-peru-may-remain-a-mystery In Lima Peru a retired fisherman reported around 1,500 dolphins washing up dead on Peru’s northern coast. At first many experts didn’t believe it until they saw it. Experts say the causes could be acoustic impact from testing for oil or perhaps an unknown virus or other pathogen. Dr. Yaipen is one of the experts that has been studding this case, he has examined about 20 dead dolphins. From what he found they all showed middle-ear hemorrhage and fracture of the ear’s periotic bone, lung lesions and bubbles in the blood. To him, that suggests that a major acoustic impact caused injury, but not immediate death. Most of the dolphins were alive when they beached, or had died very recently. Now, the death toll could be as high as 2,800. Peru’s massive dolphin die-off is among the largest ever reported worldwide.

What are some other theories of how these dolphins are dying?

How can we stop this? What can we learn from this?

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I recently read this article about how sharks are color blind. Even though the sharks are relatives to rays and chimaeras they don’t have color vision like they do. Even though the sharks eyes function function over a wide range of light levels, they only have a single long wavelength sensitive cone. They say that this new research on how sharks see may help prevent attacks on humans, and also assist in the development of fishing gear that my reduce shark bycatch in long line fishing.

They looked at the retinas of 17 shark species caught in different variety of waters in both Queensland and Western Australia. The most common type of photoreceptor in the species were Rod cells. Ten out of the 17 species had no cone cells. Cones were found in the retinae of 7 species of shark from three different families and in each case only a single type of long-wavelength-sensitive cone photoreceptor was present.

Questions:

1: Do you feel safer now that the sharks eyesight may prevent attacks on humans.
2: How long do you think it took to figure out about the sharks colored vision.

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Heres one for the record books! Last November, in Nazaré, Portugal Garrett McNarmara rode on a 78 ft wave. He was named winner of the Biggest Wave Category in the Guinness World Records. McNarmara said he didn’t really care about winning the Biggest Wave, just happy that he got to share it with his hometown and Portugal.

Do you know what was the biggest wave surfed before this one?

Do you know where?

http://www.petethomasoutdoors.com/2012/05/garrett-mcnamaras-ride-on-78-foot-wave-one-for-record-books.html

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