A Shark with Legs?
A worker at the Malaysian Fisheries Development Board (LKIM) in Batu Maung, Penang, was given this unusual Shark with Legs recently by a fisherman.
This Tilapia, a cichlid species, can change gender gender, because its gender is determined not only by its chromosomes, as it is in humans, but also by environmental conditions such as the presence of hormones, which can be effected by chemicals in the water.
University of Reno
in Nevada, has launched the Mega Fish project in conjunction with the National Geographic Society, in a last ditch attempt to save “the real-life Loch Ness monsters and Bigfoots of the aquatic world.”
for fish that match the descriptions they were shown on their computers as part of an exercise during the Pecham Summer Robotics Camp in Lansing, Michigan.
like these, photographed in British Columbia's Strait of Georgia were found this summer off the Washington coast by University of Washington oceanographers.
retail manager at Hughes Water Gardens, walks on a pathway in a greenhouse that shelters enormous water lilies.
A worker of the Malaysian Fisheries Development Board (LKIM) in Batu Maung, Penang, made this unusual
find when she was given the 1.7kg fish by a fisherman at the jetty recently. When contacted, Universiti
Sains Malaysia (USM) Muka Head marine research station head Prof Dr Zulfigar Yasin said this is the first time he had
heard of fish with legs found in the Malaysian waters. “There is a possibility that the fish could have swum from other
waters into Malaysian waters. “As far as I am concerned, fish species with legs or bony fins can only be discovered in
the waters of North Sulawesi in Indonesia or South Africa,” he said. Click
here to read the
original story. Special thanks to Jay in Pennsylvania for emailing us the link to this story.
Gender-bending chemicals could provide a new way to
combat invasive species, say researchers. Originally conceived as a cure for the enormous populations of Asian carp and
tilapia plaguing the Mississippi River, scientists now think the approach could be used to battle unwelcome crustaceans,
mollusks, fish, amphibians and reptiles around the world.Invasions of exotic species are thought to be second only to habitat
destruction as a threat to global biodiversity. The traditional approach to dealing with these interlopers has been to
introduce a known predator and let nature take its course. But this has led to numerous disasters — for example, cane
toads swamped Australia after being introduced to control the cane beetles blighting the country's sugar crop. In
Florida, tilapia were deliberately introduced to control an aquatic weed, Hydrilla, that has been choking US rivers
since the 1960s. Two species of snail were also introduced at a later date by the authorities, says Gutierrez, but
neither they nor the tilapia chose to feed on Hydrilla, both preferring native species to the invader.In
2004, alerted to Florida's problems with invasive species, Juan Gutierrez, a bio-mathematician at Florida State
University, constructed a mathematical model of a population in which males carry two different sex chromosomes (XY) and
females are XX. In many species of fish, amphibians, and other animals, gender is determined not only by sex
chromosomes, as it is in humans, but also by environmental conditions such as the presence of hormones, explains
Gutierrez. Click here
Zeb Hogan, a biologist from the University of Reno has launched the Mega Fish project in
conjunction with the National Geographic Society, in a last ditch attempt to save “the real-life Loch Ness monsters and
Bigfoots of the aquatic world.” Various giant freshwater fish species are perilously close to extinction. Far more than
smaller species, they have been decimated by fishing, pollution and dams. “From the point of view of the fish, there’s
nothing worse than a dam.” Says Hogan. “Dams block upstream migration, destroy spawning habitat, and can turn large
stretches of river into ecological wastelands.” Many of these species are simply massive. The Chinese Paddlefish, which
lives in the Yangtze River weighs half a ton and can grow to a length of seven and a half meters, whilst the Giant
Freshwater Stingray has a diameter of up to three meters. Click
original story. Special thanks to someone for anonymously emailing us the link to this story.
One Northern Michigan community is raising money to protect its lake. The city of Onekama in Manistee
County will be auctioning off artistic fish to help fund its watershed plan for Portage Lake. The community says it
can't rely on only state and federal funding any more. There are two efforts underway to protect the lake. Fifteen
artistic fish line the streets of Onekama. On Saturday they will be auctioned off to raise money for the Portage Lake
watershed endowment fund. "To the extent that we're aware, this is the first time that a local community has taken this
kind of effort into their hands." says Kathy Irvin, spokesperson for the auction. "We are not going to wait for a
disaster to happen. We have a wonderful lake here right now and we want to ensure it's protected forever." Click
Special thanks to
Joshua from Okemos, Michigan, for emailing us the link to this story.
Children of Peckham Inc. production workers took a break from studying robotics this week to go fishing.
Or, more precisely, fish studying. The 15 youngsters, ranging in age from elementary through middle school, researched
exotic fish, then visited the office of Greater Lansing Endodontics on Wednesday to see them as they swam in a huge
5,300-gallon aquarium. "I really like this," said RaSondra Evans, 14, who will be a seventh grader at Gardner Middle
School in the fall. "It's different." Learning about the fish and how the aquarium was constructed ties into using
technology to create things, which is a main focus of the robotics camp, RaSondra said. Click
Special thanks again to
Joshua from Okemos, Michigan, for emailing us the link to this story.
A reef of glass sponges, creating a deep-sea oasis 650 feet below the surface, was discovered for the
first time in U.S. waters off the Washington coast. The sponges are so rich with marine life that scientists call them
"a kindergarten or living hotel." All variety of baby organisms thrive among the reef of yellow and orange sponges,
which look something like hollowed-out, super-sized Cheetos. These "Manhattans of the sea floor" house a diversity of
starfish, crabs, shrimp, rockfish, worms and snails. "It's like being in a very fancy aquarium in an expensive Japanese
restaurant," said Paul Johnson, the University of Washington geologist who found the reef this summer about 30 miles
west of Grays Harbor. Click
The Humboldt squid, or Dosidicus gigas, that is enormous in size of up to 7 feet long and
can weigh over 110 pounds invades central California waters and feeds on local anchovy, hake and other fish populations
for market. An article in the Proceedings of the National Academy of Sciences journal says that it is an aggressive
predator that can alter its eating habits and eat the food diet of tuna and sharks that are its competitors. Stanford
University researcher Louis Zeidberg, co-author of the study, says that it is another problem to be dealt with by
fishermen because of its food consumption. Click
I'd imagine that I share a childhood experience with many of you: raising guppies, with the
memorable adventure of watching them give birth. Unlike most fish, they produce eggs that develop internally and give
birth to live offspring. That feature also introduced me to some of the basics of Darwinian evolution at an early age,
as the newly born fish had to struggle to avoid being eaten by their mother. That distinctive feature of the guppy—live
birth—has also made them a good candidate for a far more sophisticated study of evolution. One of the areas where a
struggle for resources has been proposed to play out is between a mother and her in utero offspring. Offspring
are best off if they emerge from the womb healthy and strong, which they can do by taking as many resources from their
mother as possible. Mothers, meanwhile, are under selective pressure to produce as many offspring as possible, instead
of devoting all their resources to one. That struggle plays out in terms of things like fetal growth rate and placenta
size. In mammals, these factors appear to be regulated in part by signaling through the Insulin-like growth factor 2
(IGF2) pathway, and some results suggest that this is a major evolutionary battleground. But, since nearly all mammals
go the placental feeding/live birth route, detecting indications of this struggle has been challenging. That's where the
fish come in. Guppies belong to a group of fish, the Poeciliidae (which includes the molly, platty, and
swordtail), that have a mixture of embryonic development approaches: egg only, internal egg development, and placental.
This mixture suggests that placental development arose several times and, in some cases, quite recently. The work
provides some great experimental support for the idea that the placenta acts as a battleground between the needs of the
offspring and the needs of their mother. In fish, the battle is between the two immediately interested parties. In
mammals, the data indicate that the father also gets in on the act. The IGF2 gene is imprinted, such that the mother's
copy is shut off in her offspring, and all expression is driven by the father's. It's thought that the imprinting arose
because the father is competing to ensure that mothers favor its offspring with lots of nourishment. Click
Anglers all have tales about the
one that got away, the fish of legendary size that stripped the line from the reel. A new study suggests why there might
indeed be giants and offers an explanation for how they grow so huge. Turns out fishermen
themselves can be responsible for the monsters. If a lake or pond is over fished, and a lot of the big ones are caught,
the situation is ripe for oversized freaks to develop, according to a new computer model. Click
oregon, can go
in a US
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