AquAdvantage salmon anadromous GM male salmon lack reproductive success and have a reduced number of surviving offspring. GM salmon's lack of fertilization success can be attributed to nest fidelity, quivering frequency, and spawn participation. Under simulated competition environments, 94% of siring occurred by wild-type salmon, while only 5.4% was attributed to GM salmon. This advantage allows more than twice as many wild-type offspring to be produced. Other characteristics that could cause wild-type males to be chosen more frequently could be the lack of growth of the kype, the hooked jaw of a male, and red coloration on anadromous males, which demonstrates sexual
The Salmon of Doubt in "The Salmon of Doubt" really wasn't working", and he planned on "salvaging some of the ideas that I couldn't make work in a Dirk Gently framework and putting them in a Hitchhiker framework... and for old time's sake I may call it "The Salmon of Doubt"." He had expressed dissatisfaction with the fifth "Hitchhiker" book, "Mostly Harmless", saying "People have said, quite rightly, that "Mostly Harmless" is a very bleak book. And it was a bleak book. I would love to finish "Hitchhiker" on a slightly more upbeat note, so five seems to be a wrong kind of number;