Adam S wrote:
hi bradan
i would like to see what data they are working with as i think its making the situation far too simlistic by saying "if you take out the pike then the trout do better", what kind of fishery was this research carried out on? do you think the results from the test fishery really have any bearing on lakes with such huge and difficult ecosystems to manage as mask, sheelin and corrib etc?
Adam, if I was still working on the scientific side of things I might be able to point you to the data, but I'm not unfortunately, and don't know the full facts myself. I have seen Dr. Martin O'Grady of the CFB present findings of lake surveys - and his recommendation is that small pike should be removed where stock management for game fish is policy. This is the advice the regional boards follow. The CFB have data on lake surveys going back over 40 years from lakes all over the country, including the large western loughs, so they have a huge database.
Quote:
i think its been well documented internationally that the best control measure for limiting numbers of small pike is to have some big pike to do it for you. You take out the top predators (big pike) and you have an increase in smaller pike and an increase in overall pike biomass to the detrement of other fish.
how would you propose they selectively control small pike of 1-4lbs without killing trout of the same size in lakes the size , gill nets? not easily done even if you target pike in spawning bays
The boards are also trying new electro-fishing techniques - using boat electro gear in shallow bays where pike gather for spawning - hopefully this will prove successful in targeting the smaller pike. It will never completely eliminate gillnetting, but hopefully there will be less bycatch. As it is, bycatch of trout is quite low - I'd guess trout avoid pike spawning areas at that time of year, I know I would if I was a trout
Quote:
as far as i can see nearly everything that is being done to the western lakes like euthrophication, zebra mussel spread, new weed growths and gill netting is just giving the pike and other non salmonid species more of a foothold.
There's not much more the boards can do about those other things - eutrophication is hard to stop, especially given the power of the farming lobby in this country. Zebra mussels here now - see news last week on coarse lakes in Corrib system. New invasive weeds - sure they're sold in garden centres - how are we supposed to stop those getting in when the govt won't ban their importation??
Quote:
you see the way i see it is that the boards seem to be making one fatal assumption, that is if you lessen the number of pike and lower the overall pike biomass then salmonids may be helped and that may be possible on smaller systems where you can control theings more easily. But... as far as i can tell their tactics can never work on th big loughs and in the long run will as best break even and at worst make hings more difficult for the trout
That certainly one view, but the boards have to listen to the best scientific advice available to them and act on that. At least 2 of the boards, and the thousands of local trout anglers, would be quite certain that it
has worked on the western loughs, and would be adamant that it should continue.
Quote:
its a tough call and if there was a workable system i would not be against it just because i fish for pike, i fish for all species and am as happy catching pike as i am trout or salmon so i am not saying all this beacuse i favour pike and for my own reasons...i just dont think they are getting it right
Exactly - its a tough call - and its a very bitter argument with some people. Obviously pike anglers are dead against it, trout anglers are all for it. Personally I'm undecided - I'd like to review the data myself, but hey, I've got bosses, and I have to do what I'm told too.....
Quote:
of course they could always do what the californians do and poison the whole lake
I think we'll put that one on the long finger for now eh....
