briansII wrote:Rockstar Fisherman wrote:This topic does bring up another topic that I am curious about though.
If a fish survives to "trophy" size does that mean that it's offspring that survive the initial birth part of their life etc. have greater potential to grow to "trophy" sizes? I mean "fat parents they have fat kids too" as The Offspring says in their lyrics but does this apply to fish? Seems plausible and I've heard it before but I don't know for sure, can anyone help?
The below clearly states what I have always believed.
Abstract: The rainbow trout genetic linkage groups have been assigned to specific chromosomes in the OSU (2N=60) strain using fluorescence in situ hybridization (FISH) with BAC probes containing genes mapped to each linkage group. There was a rough correlation between chromosome size and size of the genetic linkage map in cM for the genetic maps based on recombination from the female parent. Chromosome size and structure have a major impact on the female: male recombination ratio, which is much higher (up to 10:1 near the centromeres) on the larger metacentric chromosomes compared to smaller acrocentric chromosomes. Eighty percent of the BAC clones containing duplicate genes mapped to a single chromosomal location, suggesting that diploidization resulted in substantial divergence of intergenic regions. The BAC clones that hybridized to both duplicate loci were usually located in the distal portion of the chromosome. Duplicate genes were almost always found at a similar location on the chromosome arm of two different chromosome pairs, suggesting that most of the chromosome rearrangements following tetraploidization were centric fusions, and did not involve homeologous chromosomes. The set of BACs compiled for this research will be especially useful in construction of genome maps and identification of QTLs for important traits in other salmonid fishes.
Key Words: cytogenetic map, diploidization, gene duplication, linkage map, rainbow trout
I'm sure if I google it, i'll eventually find some cites. I do think(think I read part of a study, but it's beyond my short term memory threshold) trout pass on their genetics. Like you, i've heard the argument for releasing the larger class fish, to keep the superior genetics in the watershed. Hopefully NorCal Bob will chime in. Certainly, not every trout has the potential to grow to the size that this big Golden reached. So i'm inclined to believe genetics plays a big part, and where do genes come from. Scientific, eh.
briansII
Thanks Brian,
Hey, I know we all like to dig deeper than necessary when it comes to these topics but Rubikinda did take note of the Sage rod that caught the 27" on a lure, must have been a fast strip!! Maybe he wanted his pack on for some asthetics to add to the pic but why is he wearing it in the picture, just seems like a major hassel???
JIM MORRISON LIVES J/K