Dimensions of dams constructed by Eurasian beavers released in 2008 on the Allt Coire an t- Seilich Burn in Inverness-shire, Scotland, and installed Passive Integrated Transponder (PIT) loop (PIT Loops (PL)) dimensions, detection range (distance from loop at first detection) and detection efficiency (percentage of 30 tags detected when manually passed through the loop).

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posted on 2025-02-13, 18:28 authored by Robert J. Needham, Richard W. Zabel, Dylan Roberts, Paul S. Kemp

Measurements: Dam Crest Width—distance across the top of structure; Dam Height—distance from the water surface to top of dam; Water Depth Below Dam—distance from stream bed to stream surface. Dam 2 was original installed as a Beaver Dam Analogue (BDA) with fence posts driven into the stream bed in 2007 to encourage recently released beavers to build, this has been added to and now maintained as a beaver dam. *In spring 2016 an additional dam (Dam 5) was constructed on the Dam 1 by-pass channel.

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salmo trutta passive integrated transponders october — december low flow ).important positive predictors drier weather persist div >< p current population estimated castor fiber best explanatory variable associated modelling indicated 2 million individuals eurasian beaver (<beaver habitat modifications shifting climatic conditions low flow conditions peak migratory movements establish successful passage highly motivated trout passing beaver dams using prior rainfall two models used pit telemetry antennas including great britain larger fish size brown trout (<previous passage success four beaver dams upstream passage success beaver dams prior rainfall great britain four dams fish size fish passage brown trout passage success certain conditions migratory delay greatest passage conservation success whilst motivation water temperature upstream movement upland areas survival analysis study period study investigated spawning period significant covariate remaining unaltered proxy measure one modified monitoring period may become many areas localised flooding large areas land use inversely related high flows greater challenge fyke nets future due findings indicate field site europe represents engineered structures distinct difference concerns relate common loch barrier effects around 1

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