Further to an original assessment of the effects of habitat works on Derbyshire's river Goyt (http://urbantrout.blogspot.com/2009/04/appraisal-of-trial-lwd-work-on-goyt.html), recent E.A. electrofishing results at a short section that was subjected to bankside large woody debris (LWD) installations have captured the first ever instance of trout recruiting to this reach.
Although infrequent captures of low numbers of adult trout periodically show up in surveys of this reach - there have been no previously recorded instances of juvenile fish. Furthermore, the juveniles that were captured popped up when the electrodes were swept directly amongst the branches of installed woody debris.
A small result on the chart - but potentially a biologically significant insurance against recruitment failures elsewhere in the system (pollution events are an ever present threat on this, and many similar systems).
Although infrequent captures of low numbers of adult trout periodically show up in surveys of this reach - there have been no previously recorded instances of juvenile fish. Furthermore, the juveniles that were captured popped up when the electrodes were swept directly amongst the branches of installed woody debris.
A small result on the chart - but potentially a biologically significant insurance against recruitment failures elsewhere in the system (pollution events are an ever present threat on this, and many similar systems).
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