pelagic species - pelagic is from the term pelagial and derived from oceanogreaphy (marine/oceans/saltwater). It is often used as an adjective for a variety of freshwater and marine organisms to indicate they occur primarily in open water and do not orient to or favor structure in shallow water or the bottom.
Another reason hybrid stripers are not the best predators for bgill/sunfish is their mouth is small compared to their size. Bgill quickly grow to a size too large for them to eat.
I am not a fish geneticist and I do not teach that hybrid bgill after several generations revert to green sunfish. But I have heard this from numerous reliable sources and I believe it can occur after lots of inbreeding and back crossing by the offspring of the hybrids. If this is true, I think it is due to a combination of at least two main reasons. 1. More of the green sunfish genes are dominant compared to those of bgill. Successive generations and intensive inbreeding (F3,F4,F5,F6,&F7 all crossing)gradually minimize the bgill gene pool. 2. Green sunfish are more aggressive in behavior than bgill. (Did a senior project on this as an undergraduate). Those offspring with more traits of green sunfish are better at surviving and competing than the bgill. Natural Selection. Thus after time the 'bgill types' get "crowded out" and eliminated and/or are reproductively suppressed.
