Trout in the Town Blog

28/07/2016 - 10:57

The great strength of (good!) science is that it tells us how confident we can be that what you see is a true effect - or just part of the natural random variation in nature. As humans, we are so often "fooled by randomness" - we see faces in clouds and the image of the Madonna in Fried Chicken...

As one of many fascinating aspects of our own Prof. Jon Grey's research, he has contributed to the understanding of what invasive crayfish actually do "do" in our rivers. You can see his thoughts on the most recent National Crayfish Conference that he attended and contributed to here: NATIONAL CRAYFISH CONFERENCE.

Below you can enjoy some fascinating insights into what existing good quality science can tell us about invasive crayfish

Did you know that there are at least 7 non-native species of crayfish in the UK? What do we really know (by controlled measurements) about their impacts on our native fish - including trout and salmon? Is there a crayfish species that is worse for UK waterways than the signal crayfish? The answer to the last question is yes; but right now it is still only here in small numbers...



 

08/07/2016 - 15:55

Andy Thomas gives us a great selection of his three favourite projects from last year. These are a quick highlights of his works to improve trout and sea trout streams in his role as Conservation Officer for Southern England for the Wild Trout Trust. Improving an urban concrete sea trout stream is his first stop...

05/07/2016 - 15:05

Careful and objective research reported at the Annual Get Together of the Wild Trout Trust by Dr. Kevin Wood of the Wildfowl & Wetlands Trust.

04/07/2016 - 14:47

Most rivers run through human settlements at some point during their length. Paradoxically, because the fragmented ownership (or previous water quality) of urban rivers has traditionally discouraged fly fishing clubs, the wild trout populations are often very healthy. 

Andreas Explaining How Opinions and Practices Related to Wild Fish are Changing (see video below..)

A regime of benign neglect (rather than removal of cover for insects and fish through over-zealous manicuring) and also the reduction of competitive or genetic impacts from extensive stocking often gives rise to some excellent wild trout fishing in urban settings. 
 
That is so long as the water quality is good enough and there is a viable source of colonisation for wild fish...
 
So, perhaps there are additional benefits to both reducing the number of straying stock fish from heavily-managed rural reaches - and at the same time increasing the supply of well-adapted, stream-bred fish throughout the river system?
 
The big question is - how do you hope to shift such a dominant and long-lasting practice in fisheries that are highly valuable in financial terms... ?
 
Bearing in mind that such fisheries are also subject to some of the strongest rituals and codes of practice when it comes to both fishing and also the keepering of the river...
 
Well, Salisbury & District Angling Club are doing just that and Andreas Topintzis from SADAC gives a great account of it in his talk that he gave to the Wild Trout Trust Annual Get Together (which this year was held at Langford Lakes on the banks of the River Wylye in Wiltshire)
 
29/06/2016 - 16:40

A Five Minute run-down of what the Trust has done with your donations and in-kind support between summer 2015 and summer 2016.

If you think some/all of these things are a good thing, then please support us by donating £3 per month (or even go for life membership or another donation) on this link:

10/05/2016 - 12:42

I'm very pleased to be able to say that life is starting to recolonise after the extensive works to open up the culverted section of the Porter Brook at Matilda Street.

It was a delight to receive the photos on Twitter showing some of the aquatic creatures that are beginning to colonise the daylighted section of channel.



Some of the different beasties that have already moved in include Baetidae (agile darter nymphs), Gammaridae (freshwater shrimp), Heptageniidae (flat "stone-clinging" mayfly nymphs), as well as Oligochaete worms, Caseless caddis of the Hydropsyche and Rhyacophila genuses.

Hopefully the newly-created variation in channel depth, velocity and structure will provide lots of opportunities for more species and individuals for a long time to come.

If you live within striking distance of Sheffield and you want to get in on future invertebrate monitoring and other works in the streams and rivers of the city, you can email them on sheffieldsprite@gmail.com and also see their website at http://www.sheffieldsprite.com/
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