Annan Fishery Management Plan - RAFTS

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River Annan DSFB Fisheries Management Plan 2009 – 20145.3.7Other Research InvolvementThe RADSFB is consistently involved in assisting other research projects such asthe investigation of salmon Red Vent Syndrome (RVS) being conducted by theFRS marine lab. Parasitological investigations have shown the presence ofnematode worms, including Anisakis sp. and Hysterothylacium sp., in the regionof the vent of all fish examined that have shown signs of RVS. These parasitesoccur naturally in wild fish and are a contributory factor, or may be the primarycause of red vents, although research is ongoing (Marlab website).In addition, the Board has collected samples for the marine lab to carry outresearch involving oestrogenic effects of pollutants such as the human birthcontrol pill and also a study of chemical contamination of fish flesh for the FoodStandards Agency.The RADSFB also collects data for such as predator counts of cormorants andgoosanders. Unfortunately, accurate data collections of salmonid smolt numbersare currently outwith the resources of the Annan DSFB.Action Description Reactive orProactive5.3.7.a Continue to assist any research projects Proactiveundertaken by outside agencies within thecatchment where possible5.3.7.b Continue to undertake and attempt to expand Proactiveany new lines of research within the catchmentwhere possible5.3.7.c Continue to collect and improve data on Proactivepiscivorous birds.TimescaleOngoingOngoingOngoing55
River Annan DSFB Fisheries Management Plan 2009 – 20145.4 Fisheries Enhancements5.4.1 Habitat EnhancementsA Project Officer has been employed to deliver the Rivers Kirtle & Annan HabitatImprovement project (hereafter referred to as the “Annan Habitat Project”). TheAnnan Habitat Project is one of around 20 involving various partners on theScottish Solway coastlands and river valleys. The projects are being run inconjunction with and on behalf of these partners by Dumfries and GallowayCouncil under the banner of the Sulwath Connections Landscape Project.Funding for the Annan Habitat Project comes from the Heritage Lottery Fund(52.9%), Scottish Natural Heritage (28.04%), the RADSFB (18.02 %) and theRiver Annan Improvement Association (0.94%).The Annan Habitat Project focuses mainly on the fencing of lengths ofwatercourse to prevent livestock encroaching on the bankside. The initial targetfor fencing is to complete 40,000 metres. Examples of completed fencing projectsare shown in Figure 4.4.1 below. Damage caused by cattle and sheep accessingunfenced watercourses results in silt inputs, broadening of the stream channeland reductions in water depth. Silt inputs are known to blanket the bottom of astream, reducing shelter between instream substrate for juvenile salmonids andsmothering fish eggs and aquatic plants. Site-feeding and breathing may also bemade more difficult for resident fish and aquatic insects. In addition, broadeningof the stream channel and reductions in water depth are likely to increase watertemperatures. In time, these temperatures can make the stream a less desirablehabitat for fish and other animals, or may make it totally uninhabitable (e.g.Association of Rivers Trusts website). Grazing by livestock also reduces thegrowth of natural vegetation on banksides. Draped and marginal vegetation isused as cover and shade by fish, reducing predation and water temperature. Inaddition, vegetation gives sources of food with insects falling into the water andleaf litter providing detritus for aquatic invertebrates. Vegetation also helps toreduce erosion by binding bankside soils. The potential benefits of fencingprojects are many in terms of creating optimal habitat for salmon and trout as wellas other aquatic and terrestrial organisms. and may be complemented by ripariantree planting, again providing a source of shade and food for fish. It may also bewithin the scope of the project to help prevent bank erosion by use of softengineering works such as the “Log and Christmas Tree” technique (Figure4.4.2).The Board also carries out inspections of forested areas near watercourses tolook for breaches in the most up to date version of Forest and Water Guidelines.Issues such as tunnelling and inappropriate culverting are of particular concern.There have also been removals of obstructions to fish migration (see Section4.1.3). Further work is required in all the above areas and it is the aim of theRADSFB to secure future funding to continue with improvement schemes.56
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Annan Fishery Management Plan - RAFTS

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