Fine sediment influence on salmonid spawning habitat in a lowland agricultural stream: A preliminary assessment

  • Soulsby C
  • Youngson A
  • Moir H
 et al. 
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Abstract

Spawning habitat utilized by Atlantic Salmon (Salmon salar) and Sea Trout (Salmo trutta) was characterized in a 1.6-km reach of the Newmills Burn, a small, highly canalized tributary of the River Don in Aberdeenshire. The Newmills Burn is typical of the intensively farmed lower sub-catchments of the major salmon rivers on the east coast of Scotland. Such streams have substantial potential in providing spawning and juvenile habitat for salmonids, with high redd densities resulting in egg deposition rates of >5 m2. However, in comparison with upland spawning tributaries draining less intensively managed catchments, canalization and intensive cultivation has seriously degraded the physical characteristics of aquatic habitats in many streams. In the Newmills Burn, spawning gravels have a relatively high (>20% by mass) fine sediment (

Author-supplied keywords

  • Hydrology
  • Salmonids
  • Sediments
  • Spawning

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Authors

  • C. Soulsby

  • A. F. Youngson

  • H. J. Moir

  • I. A. Malcolm

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