water

Tag archives for water

  It is not surprising that Biwa salmon (image above), a subspecies of Oncorhyncus masou, do not adapt to seawater very well after having been landlocked in Lake Biwa, Japan for the last 500,000 years or so.  Researchers from Hokkaido University and Shiga Prefecture Fishery Experiment Station in Japan wanted to know what caused the salmon to…

Battling ion loss

Freshwater fish are in a constant battle with their environment when it comes to maintaining their electrolyte balance as they are continuously losing ions to the surrounding water. Therefore, they have to actively absorb ions such as sodium, calcium and chloride from the water (see figure below). Prior research has shown that acidic environments cause…

The mystery of deformed frogs

Since 1995 deformed frogs have been turning up. Call them the canaries in the coal mine for environmental health. Frogs are showing signs of some kind of stress. So is it a parasite? Pollution? A natural phenomenon? Cannibalism? Fungus? Ultraviolet light? Something in the water? Video from YouTube The tap water data referred to in…

You have to see this to believe it. This video from CNN shows how a 31-pound cat is losing weight by walking on an underwater treadmill. I wonder how they were able to get this cat to even stay in the water. I think my cat would lose more weight in the process of fighting…

Fish water jet

Check out this video of an archer fish (Toxotes jaculatrix) shooting down prey by creating a water jet: Here it is again in slow motion: Until now, the mechanism by which the archer fish produces such a powerful jet of water was a mystery. Contrary to prior hypotheses, the fish do not have specialized internal…