trout
edyong | August 28, 2009This article is reposted from the old Wordpress incarnation of Not Exactly Rocket Science.
Getting excited when fish produce sperm would usually get you strange looks. But for Tomoyuki Okutsu and colleagues at the Tokyo University of Marine Science and Technology, it's all part of a day's work. They are trying to use one species of fish as surrogate parents for another, a technique that could help to preserve species that are headed for extinction.
Okutsu works on salmonids, a group of fish that includes salmon and trout. Many members of this tasty clan have suffered greatly from over-…
ddobbs | June 16, 2009SciAm ponders evidence that fish hatcheries are watering down the trout and salmon gene pool.
Matt Yglesias looks at one of many lies being told by those opposing health-care reform â confirming Salon's prediction that the opponents of reform are not going to play nice. See also The American Prospect on How Big Pharma Intends to Kill the Public Option. I should add this campaign is having an effect: On the radio this morning I heard NPR Steve Insky Inskeep vigorously press the "public plan as trojan horse" attack on Kathleen Sibelius; I can only hope he'll as vigorously ask people such as…
edyong | May 15, 2009
Helping out a threatened predator by culling their prey seems like a really stupid idea. But Scandinavian scientists have found that it might be the best strategy for helping some of our ailing fish stocks.
Lennart Persson and colleagues from Umeå University came up with this counterintuitive concept by running a 26-year natural experiment with the fish of Lake Takvatn, Norway. At the turn of the 20th century, the top predator in Lake Takvatn was the brown trout. Over-fishing sent its numbers crashing, and it was virtually gone by 1980.
In its place, a smaller fish - the Arctic char Â-…
grrlscientist | September 17, 2007tags: researchblogging.org, salmon, trout, spawning, molecular biology, cloning, conservation, endangered species
A trout germ cell is transplanted into the body cavity of a newly hatched salmon embryo. This is part of the process that allowed adult salmon to successfully spawn trout offspring.
Image: Science magazine
Have you ever heard of a trout with salmon for parents? Since when has one species given birth to another species? Well, ever since scientists began experimenting with salmon in the hope that they could genetically alter these fish by injecting sex cells from trout so the…