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  #11  
Old 29-07-2017, 04:41 PM
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Default Re: Triploid Rainbow Trout

[quote=BobP;2264988] doubt very much that triploiding is having any effect on the Stithians fish as far as their ability to feed is concerned.

Rudd and Roach can carry big loadings of parasites that have only a small effect on themselves and don't stop them breeding at all, but they may have an effect on trout, gill maggots can reduce a trout's ability to absorb oxygen through their gills, although this in itself may not kill them it can weaken them enough for them to lose condition fast. Have there been any checks on the health of the resident fish, I don't mean the ones you catch, sick fish are unlikely to take your fly. If you think the mortality rate is too high contact the EA and ask for their advice.
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  #12  
Old 29-07-2017, 06:04 PM
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Default Re: Triploid Rainbow Trout

Thanks for that Bob P - your comments about the thriving Rudd are very plausible, particularly as the Rudd epidemic has occurred coincidentally with us noticing the drop off of surviving Rainbows.
Dont know why we should suddenly have a plethora of Rudd though, but we certainly have.
Its a bit chicken and egg really- the Rudd could be thriving because the Rainbows are not feeding in the warmer water conditions of recent summers?
Still no further forth in understanding what we should recommend be done to improve the year- round fishing.
Maybe we should stop stocking altogether and make it a catch and release Wild Brown Trout water.
Or perhaps we could try reducing stocking levels by half, and focusing some effort on improving the environmental ecological conditions by planting and other projects.
Thanks for your interest.
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  #13  
Old 29-07-2017, 06:30 PM
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Default Re: Triploid Rainbow Trout

Quote:
Originally Posted by mike2 View Post
Dont know why we should suddenly have a plethora of Rudd though, but we certainly have
Good years and bad years, the Rudd in my pond have spawned multiple times this year, three times by my reckoning but it could be four and their at it again as I type. Last year they spawned twice, it's anyone's guess how many are in there now.
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  #14  
Old 29-07-2017, 09:49 PM
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Default Re: Triploid Rainbow Trout

I would think that the first course of action is to get a health check carried out on all the fish species in the reservoir if at all possible. Rudd, brown trout and rainbows. You would be looking at around 100 fish in total to give you a range of sizes across the species.

The rainbows, of course, will have a health check carried out at 6 monthly intervals on the fish farm, but it would be a useful comparison.

It will cost a bit, but without knowledge of the current health status of the fish, you are groping in the dark.
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