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originally posted by: Sennex
a reply to: LevelHeaded
Ia! Ia! Cthulhu Fthagn! Ph'nglui mglw'nfah Cthulhu R'lyeh wgah'nagl fhtagn!
originally posted by: beansidhe
a reply to: Sennex
Good news that it's a natural process, but terrible news for the fishermen. I wonder how long it will take before the fish will come back?
Jellyfish feed on zooplankton and autumn there will be less food. A natural life cycle of jellyfish is that they bloom up in the summer and has tremendous growth during the autumn. Until dinner plate becomes smaller. Some of them overwinter down at the bottom, but most will die during the winter, explains Fosså. - But we have said that proviso. We are waiting for the samples so that we get this exactly examined. But we believe at least ribbed jellyfish cause.
The fjord now holds an estimated 40,000 tons of these round, red-colored, sea creatures.
And this invasive species is impacting local fishing stocks.
Jarle Mork, a professor and researcher at the Norwegian University of Science and Technology in Trondheim, has been studying the effects of the booming number of jellyfish.
"They are very efficient predators," Mork says. "The population can grow to huge sizes in relatively few years. And they eat the same food as the young stages of the commercial fishes. And in addition they eat small and young stages of those competitors."
Current ecological problems
In many fjords of Norway the helmet jelly has proliferated since the 1970s. It has become a competitor of fish for food and is thereby also a threat for the fishing industry. These jellyfish should have been deprived of their own food basis by displacement by almost all other sea creatures, yet the medusae swarms still live. The cause is being studied at this time by marine biologist Ulf Båmstedt. Also not far from Bergen, in the Lurefjord, helmet jellies have proliferated. The objective is to find a possible explanation for the new mass development. The ecology and population dynamics will be investigated by Norwegian and American work groups. The ontogeny, in particular the development of pigmentation, luminescence, food absorption and sense capacity, will be researched in a Hamburg work group.
originally posted by: Blaine91555
Might be related to this about jellyfish in that area last year?
The fjord now holds an estimated 40,000 tons of these round, red-colored, sea creatures.
And this invasive species is impacting local fishing stocks.
Jarle Mork, a professor and researcher at the Norwegian University of Science and Technology in Trondheim, has been studying the effects of the booming number of jellyfish.
"They are very efficient predators," Mork says. "The population can grow to huge sizes in relatively few years. And they eat the same food as the young stages of the commercial fishes. And in addition they eat small and young stages of those competitors."
Perhaps this is just the end results of what this article is about.