But activists say the biggest threat is the genetic impact of farmed fish that escape their pens, reproduce with wild salmon and produce offspring ill-equipped to survive.
Its genetic impact can be greater in rare taxa, due to their vulnerability to pollen swamping by more abundant congeners.
McGinnity, P. et al. Genetic impact of escaped farmed Atlantic salmon (Salmo salar L). on native populations: use of DNA profiling to assess freshwater performance of wild, farmed, and hybrid progeny in a natural river environment.
The objective of this research was to bioengineer an efficient vector that can be used for genetic modification of stem cells without any negative somatic or genetic impact.
To study the genetic impact of using sorted semen in commercial herds, a scenario was evaluated in which female-sorted semen was available to commercial herds.
The occurrence of hybridisation between grey wolves and domestic dogs is well documented from different parts of the wolf geographic range, but little is known about the frequency of hybridisation events, their causes and the genetic impact on wolf populations.
To test the genetic impact from that loss of geographic range, researchers compared genetic markers from 146 modern-day alpine chipmunks with those from 88 of their historical counterparts.
Although this period has been well explored in central Europe using ancient nuclear DNA [1, 2], its genetic impact on northern and eastern parts of this continent has not been as extensively studied.
Second, to study the genetic impact of using sorted semen in nucleus herds, scenarios were simulated in which female-sorted semen was used only in a centralized nucleus herd, in which multiple ovulation and embryo transfer (MOET) took place.
Interestingly, the genetic impact is much stronger on asthma starting in childhood than on asthma starting later in life [6].
Stephen O'Brien, a geneticist at the National Cancer Institute's Laboratory of Genomic Diversity in Frederick, Maryland, and colleagues researched the genetic impact.
