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This web site contains information about Pet Fish Talk, the weekly internet talk show about keeping pet fish in aquariums, fish bowls, and ponds.
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Pet Fish Talk.
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Pet Fish Talk about keeping pet fish in aquariums, fish bowls, and ponds.
Pet Fish Talk about keeping pet fish in aquariums, fish bowls, and ponds.

Pet Fish Talk about keeping pet fish in aquariums, fish bowls, and ponds.

Pet Fish Talk about keeping pet fish in aquariums, fish bowls, and ponds. Pet Fish Talk about keeping pet fish in aquariums, fish bowls, and ponds.
Pet Fish Talk.

Educators, this logo indicates that this web page contains educational materials. Click here to go to another page in this website with links to more educational materials.

     For the August 1, 2007 Pet Fish Talk Show.
In this show the Bailey Brothers talk with callers and read questions from listeners.
Click here now to hear all
four segments of this show.
Click here to read the notes at the bottom of this page about how to follow the links in this Listening Guide.
Listening Guide with Comments, Pictures, and Links for this Week's Pet Fish Talk Show
Segment One
Fish in the News. Each week the Bailey Brothers start the Pet Fish Talk Show with some fun and interesting stories about fish in the news.
Shark with Legs? 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.
Tilapia can change gender. 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.
Mega Project to save huge freshwater fish. 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.”
Children search for fish. Children Search
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.
Glass sponges Glass Sponges,
like these, photographed in British Columbia's Strait of Georgia were found this summer off the Washington coast by University of Washington oceanographers.
Enormous water lilies. Niki Atterbury,
retail manager at Hughes Water Gardens, walks on a pathway in a greenhouse that shelters enormous water lilies.
From Malaysia
A Shark with Webbed Feet?
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.
From the ISME Journal

Gender Change wipes out Invasive Species.  

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 to read more.
At the University of Reno in Nevada
The Mega Fish Project: Saving the Huge Freshwater Fish.
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 here to read the original story. Special thanks to someone for anonymously emailing us the link to this story.
In Onekama, Manistee County, Michigan,
City will Auction Decorative Fish to Protect Area Lake.
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 here to read more. Special thanks to Joshua from Okemos, Michigan, for emailing us the link to this story.
In Lansing, Michigan,
Fishing Trip helps Students learn Critical Skills.
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 here to read more. Special thanks again to Joshua from Okemos, Michigan, for emailing us the link to this story.
From Seattle, Washington,
Reef of Glass Sponges found off Washington's Coast.
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 here to read more.
In California
Jumbo Squid Invadors
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 here to read more.
Evolutionary Battleground: The Placenta
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 here to read more.
Study Suggests Over Fishing Yields Giant, Cannibal Fish.
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 here to read more.
In West Linn, Oregon,
The Wonders of Water and Aquatic Life 

You don’t have to go to nature. Hughes Water Gardens can bring nature to you. The Tualatin-based company, located just outside West Linn and on the edge of Wilsonville, oregon, can go as large or as little as you desire to get the sights and feels of nature – plants, fish and bubbling, flowing water. Just the things to relax your body, mind and spirit. “It can be just like nature, where everything is in balance,” said Niki Atterbury, the center’s retail manager. “It’s very pleasant to be around. “People like the sound of fish. They like the feel of nature and peacefulness. It’s like sitting next to a brook.”  Click here to read more.

Black Lake in Washington State
150-kilogram White Sturgeon in a US Lake
Fisherman discovered a 150-kilogram white sturgeon in a US lake, although sturgeons have never been found there before. Sturgeon are commonly found in deep pockets of major rivers that lead into the ocean, not in warm water lakes like Black Lake in Washington state where it was found. Click here to read the original story and see a video. Special thanks to Peter H. in New York City for the link to this story. Click here to read Peter's blog about his aquarium.
From London, England,
Zebrafish Study may point way to Blindness Cure.
The ability of Zebrafish to regenerate damaged retinas has given scientists a clue about restoring human vision and could lead to an experimental treatment for blindness within five years. British researchers said on Wednesday they had successfully grown in the laboratory a type of adult stem cell found in the eyes of both fish and mammals that develops into neurons in the retina. Click here to read the entire story. Special thanks to Gabe from Brooklyn, NY, for sending us the link to this story.
Segment Two
Segment Three
Segment Four
A Big Sincere Thank-you for calling during the show to

Evan from Colorado,
Matt from Tennessee, and
Albert from Las Vegas.

The Bailey Brothers encourage YOU to call Pet Fish Talk
during the show and talk about your pet fish.
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