This is a purely hypothetical question.
What would the consequences be if there were grayling introduced to a trout river with runs of salmon and sea trout? Do the two species live harmoniously or in seperate sections of a river or do they vie for food, space and redds? Are there any benefits?
Also do some rivers or specific features of a river ( i.e volume/depth/ speed of current, vegetation, river bed) suit Trout or Grayling more. Sorry for all the questions, its just there is no grayling fishing in Fife but there are plenty of small streams and it got me thinking what if? Not that i would!. Jon

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Why not throw in some barbel as well to doubly benefit this hypothetical Fife river system?

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Save the softmouth trout

The reason that there are no Grayling there in the first place is probably because the conditions aren't suitable for them. Wild trout rivers are not Grayling rivers, take note.

Hi,here they did that...long ago in some rivers.....nothing specialy happened

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Save the Softmouth
The ancient noble trout of Montenegro

Jon,
Grayling spawn at different times of year to salmon/trout, so redds aint gonna be a problem, they take up simillar positions to trout in rivers till water temp drops, then they are in deeper glides, eddies, and will take food that trout need.
However, biggest issue is the introduction of foreign species.
you need relevant liscences from snh, smaff, et al, and that aint gonna happen!
regards
bert

It probably has more to do with the ice age than conditions in the rivers not being suitable. There can't be many trout rivers that wouldn't support grayling in their lower and middle reaches.

They appear to rub along just fine with trout, sea trout and salmon. They don't compete on the redds as they spawn at different times. They do hang around the tail end of redds when salmon are spawning and pick off loose eggs but then so do trout.

Should they be stocked in rivers where they don't already occur - NO!


Andy

Apologies for asking a perfectly sensible and enquiring question. It is not something i am going to do, but would like know about.

No need for sarcasm, if you have anything constructive to contribute it would be appreciated.

---------- Post added at 09:38 PM ---------- Previous post was at 09:33 PM ----------

Why, when the ice receded would there be grayling left all round Fife but not in it. We had huge amounts of glacial outwash which formed the majority of the Kingdom, how would this have affected the deposition of species? When's Zeolite back from the rockies he'd be able to tell us!

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Not sure. When I mentioned the ice age I might have been talking cobblers
I can't recall where they have been stocked in the past.

Andy

maybe in your country m8..but not in mine..so to make a rash statement like that is not to good if you haven't made a research on it in the first place.

..grayling is a specie belonging to the family of Salmonidae and here for example the 'rocky mountain whitefish' is the cousin to the grayling, also from the family Salmonidae..which thrives with rainbows, and browns, and cutthroats in many of our rivers..and so if as you said if the water conditions are right, all can live in harmony, but the grayling can survive in waters were there is less oxygen, which makes it hard for other trout other than the Lake trout..............AW

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All right I'll be more constructive; this previous post explains how grayling came to what is now Yorkshire and the Humber rivers. I would suggest that all the other grayling in Scotland, and all British southern and western flowing rivers were introduced comparatively recently by man.



Trout Redds: Don't tread on these when grayling fishing

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Save the softmouth trout