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Australia To Use GM To Control Carp

mskfisher writes "Yahoo! News is running an AFP story on Australia's efforts to control the carp population using a 'male-only' gene. The gene will prevent the carp, considered a pest in Australia, from producing female offspring. The carp has wiped out some 90% of the native south Australian fish population, namely perch and bass. They do not, however, mention any ways of controlling the spread of this gene in the wild, besides the obvious death of any affected population."

15 of 358 comments (clear)

  1. Well I worry about this one by tekiegreg · · Score: 3, Interesting

    Suppose this gene multiplies further out past Australia, we could very well see the extinction of all Carp once they all become male.

    Genetic work can be beneficial, but the long term considerations must be considered, how about mass breeding/releasing of sharks in the water to eat all these carp (I know the human implications of all those sharks terrorizing humans)? Or just increased fishing programs? There's got to be another way....

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    1. Re:Well I worry about this one by Wabin · · Score: 5, Interesting

      The gene does not cause infertility, just maleness. So it can spread. Which is in fact what they want; They can't very well introduce the gene into all of the fish out there (if they could, they would have just killed them all) so what they want to do is introduce this gene, then as it spreads, gradually the proportion of males in the population will increase. When you have all males, then the population dies. There are, of course, problems with this approach. One is the potential for accidental spread, both to other populations of carp outside Australia, and to other species.* Another is that the females who are left are likely to produce more surviving offspring (population limits in fish are not usually from the number of eggs produced). Another is that it will take a while to have huge effects, during which time mutations might arise that block this mechanism and allow female development. Such a mutation would spread rapidly (it would be highly favored by selection once the population got far off 50-50) so you would be back a square one. Biocontrol of introduced species is notoriously bad, particularly in Australia. See Cane Toads. We are exceptionally bad at foreseeing all of the downstream consequences of such manipulations of the ecosystem. A cool idea, and some great work by the scientists, but lets hope that they think long and hard before releasing these fish into the wild. *do you really think that all those extra male carp will ignore the chance for some kinky inter-species romance? It just takes one...

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    2. Re:Well I worry about this one by deacon · · Score: 3, Informative
      You have obviously never had a properly prepared carp!!!

      Absolutely delicious when fresh killed, breaded, and deep fried.

      The fine bones are only in the tail end, the center part provides large fillets which have only 4 or 5 huge bones which are impossible to miss.

      When dressing the carp, you must remove a gland from the inside without breaking it, or you will spoil the taste of the carp.

      Carp is, btw, a traditional xmas meal in Czech Republic

    3. Re:Well I worry about this one by azav · · Score: 4, Informative

      Ok. Australia is an island last time I checked. The carp would have to be transported outside of Australia to allow this gene to propogate. Carp are fresh water fish. They die in salt water. Interspecies gene transfer from a fresh water fish to a salt water fish, to the same fresh water species somewhere else is a large stretch of the imagination.

      RE: sharks. You seem to be missing the fact that sharks are mostly salt water creatures and you would have to breed fresh water sharks that have a taste for carp.

      Fact: by reducing the viable reproductive population of females, a population will crash as the female die out. You need females to grow a population, not males. Still, it would take many years for the carp populations to die out. Carp live for a long time.

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      - Zav - Imagine a Beowulf cluster of insensitive clods...
  2. Hmm... by LordK3nn3th · · Score: 5, Funny

    "Australians report rise of homosexual fish"

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  3. Aussies. pest control. by Anonymous Coward · · Score: 3, Funny

    This just doesn't look good.

  4. carp is a freshwater fish by alsta · · Score: 5, Informative

    Since all carp that I know of are freshwater fish, it stands to reason by that assumption that the species was introduced by man. In fact the article mentions the word "introduced" but neglects to mention by what means. Had it been by natural cause, the choice of word would commonly be "migration".

    As such it would be next to impossible to spread this gene outside of Australia, where the species isn't wanted anyway. So unless I am wrong in my basic assumption that man caused this in the first place, the problem is contained.

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    1. Re:carp is a freshwater fish by bshroyer · · Score: 3, Insightful

      My later comment should have been a reply to yours, but we were responding contemporaneously...

      The fact that the carp has been introduced everywhere by man, and is so ubiquitous, practically guarantees it'll be smuggled out of Australia to other "carp-infested" locales.

      It would also be an insidious attack against the Asian countries who rely upon carp for food - by releasing the GM fry into farms, lakes, and rivers in SE Asia.

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      The cure for cancer is coming: Reovirus
  5. GM? by tommck · · Score: 3, Funny
    Am I the only one who pictured a steering wheel bolted to the top of a carp? I would expect that a steering wheel would be sub-optimal for maneuvering in the water...

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  6. Do it to goldfish in the USA! by supabeast! · · Score: 3, Insightful

    I grew up next to a small river. As a child, my friends and I spent many afternoons fishing in the river for bass, sunfish, and catfish. In the late 1980s a trend began among irresponsible fishermen of using "feeder" goldfish, most of which were tiny orange carp, as bait because they were cheaper than minnows. At the end of the day, those guys would toss any extra bait into the river, where they thrived and grew to huge sizes. Native fish were wiped out, followed by the huge snapping turtles that could no longer survive in the screwed-up ecosystem. Those damned goldfish became the kudzu of our water, weren't any fun to fish for, and now the only people who fish in those waters are illegal immigrants desperate for food.

    If something like this were done with those stupid pet goldfish, it would be a great boon for a lot of fishing spots that might eventually be destroyed by idiots using non-native bait.

  7. Carp are Nasty Fish by l810c · · Score: 3, Funny
    A few years back a few friends and I were cruising around Lake Powell in Utah. For those not familiar with Lake Powell, most of the lake is sheer canyon walls with little vegitation and few places to exit the lake.

    We are cruising up one of the side canyons and the only place to exit is surrounded by boats and has no trees. My friend has to take a dump. So he jumps into the lake and drops his bathing suit. As soon as it hits the water, he is immediately attacked by 20-30 Huge carp in a big feeding frenzy. The water was boiling, my friend was screaming and we were crying from laughter.

  8. Could backfire by mfender9 · · Score: 3, Funny

    Won't this just mean that a million sexually frustrated male carp will beat the fish-crap out of all the perch and bass instead?

  9. This gene is GUARANTEED to escape by bshroyer · · Score: 4, Insightful

    In general, one would think that introducing a GM freshwater fish in Australia would be a safe bet for containment. However...

    There is NO WAY that this gene could be contained in the small "backwater basin" in Australia. There are enough other locales in the world (the majority of the US, and its Great Lakes for one) in which carp are despised, and enough motivated people with mobility, that there would quickly spring up a "black market" in these GM carp for export to ponds, lakes, and rivers abroad.

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  10. Imagine by sacrilicious · · Score: 3, Informative
    Interspecies gene transfer from a fresh water fish to a salt water fish, to the same fresh water species somewhere else is a large stretch of the imagination.

    I wouldn't count on that. A big issue in the San Francisco Bay area has been the phenomenon of foreign tankers emptying their balast chambers (or some kind of huge water-containing chamber) in the SFBay, thereby introducing tons of non-native species to the area.

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  11. How to eat a carp: +1, informative;-) by waferhead · · Score: 5, Funny

    My father taught me this when I was little:

    1)Clean and wash carp.
    2)Tie carp to good quality oak or maple board using fine Stainless leader wire.
    (2 carp can be prepared at a time, either side of board)
    3)Baste carp constantly, slowly rotating over an open fire (mesquite is good)using a mixture of lemon juice, butter, honey, and a bit of cayenne pepper.
    Takes approximatly 4 hours, perhaps longer.

    When boards become tender, dicard carp, and eat the board.