BF2S Forums Would you support it?

RicardoBlanco wrote:

I thought you were leaving this forum?

cyborg_ninja-117 wrote:

Bertster7 wrote:

It depends. I agree with it in principle and see that it is a useful means for making crops more successful in harsh conditions. Where its use contaminates other crops and ecosystems then I am against it.

Explain how it can contaminate other crops or ecosystems? (Seriously, not an insult but I wanna know)

jord wrote:

Sure then all the Africans won't starve.

I wouldn't eat it myself like, unless it was alot cheaper.

Last edited by KEN-JENNINGS (2007-05-10 11:36:48)

In support of the emerging industries of warmwater marine fish mariculture, genetic engineering and classical genetic improvement programmes have been initiated for a variety of exclusively marine fish. These programmes have the potential to perturb allele and genotype frequencies, or introduce novel alleles and genes into conspecific wild populations. Despite concerns to the contrary, the following hypothesis remains to be falsified: `laboratory induced allele frequency/genotype changes and novel alleles or genes have a negligible probability of being selectively favoured in wild populations under natural selection, and accordingly, without sustained large scale releases, have little potential for ecological impact'

_{The impact of escaped farmed salmon on wild populations may have potentially negative genetic and ecological effects. There is widespread evidence that farmed salmon interact with wild salmon. The use of sterile fish in culture has been proposed as a means of eliminating genetic interaction and minimising the ecological effect of farmed salmon. In this study, the migration behaviour of groups of triploid salmon were investigated through the controlled release of microtagged triploid and diploid stocks on the western coast of Ireland. Mixed-sex and all-female stocks of ranched grilse origin were triploidised using hydrostatic pressure. Smolts were ranched from the hatchery of origin and two groups of post-smolts were released from cages in a marine site. The return of adult salmon from these experimental release groups to coastal and freshwater capture sites was monitored as part of the Irish national coded wire tag recovery programme. The return of triploid salmon from each of the release groups, both to the coast and to fresh water, was significantly reduced compared to diploid salmon. The highest percentage return to fresh water (2.25%) was in the ranched mixed-sex diploid group. In contrast, no salmon from the cage release groups returned to the hatchery location on the Burrishoole river system and recoveries in other freshwater systems were low (<0.01%). The return of a small number of hormonally deficient, sterile triploid female fish suggests that migration to fresh water is not inextricably linked with reproduction. The substantially reduced return of hormonally competent triploid males to the coast and to fresh water, indicates that other factors may have an effect on their marine survival.}
The reduced return of triploid salmon to the coast and to fresh water, together with their inability to produce viable offspring, demonstrates the potential for triploidy as a means of eliminating genetic interactions between cultured and wild populations, and of reducing the ecological impact of escaped farmed fish.

Is Sterilization 100 percent effective so we can be sure that transgenic salmon will really be sterile?

YES: Triploidy produces 100 percent sterilization in female salmon because it prevents the development of the ovaries needed to produce eggs. The only uncertainties about the technique have been raised in the context of male salmon, grass carp and oysters. There is no scientific debate over the complete sterility of triploid female salmon.

Last edited by topal63 (2007-05-10 13:12:28)