Freshwater Fisheries and Conservation

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  • Topic: Dam, Chemical oxygen demand, Aquatic ecology
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THE UNIVERSITY OF HULL

Department of Biological Sciences Level Six Examination May/June 2012 Freshwater Fisheries and Conservation Wednesday 30th May 2012, 1.30 – 3.30 p.m. 2 hours

Answer THREE questions Use a separate book for each answer Use diagrams where appropriate Where shown the % indicates the mark distribution within a question

Do not open or turn over this exam paper, or start to write anything until told to by the Invigilator. Starting to write before permitted to do so may be seen as an attempt to use Unfair Means.

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Answer THREE questions Use a separate book for each answer Use diagrams where appropriate Where shown the % indicates the mark distribution within a question

1.

Climate change is putting increasing pressure on water resources and resulting in the need to establish environmental flows in rivers. Outline the principles of environmental flows in relation to maintaining fish population integrity. (50%) Describe the impacts of dam construction for water supply, hydropower generation, irrigation and flood control on flows and the effects on fish and fisheries. (50%)

2.

In the 1950s to 1970s many lowland rivers were degraded by engineering activities designed to minimise flooding of adjacent land and regulate flows. i) From a fisheries perspective, describe, with reasons, the methods you would adopt to rehabilitate such an engineered river or floodplain. (70%) If river engineers propose to carry out similar schemes today, with reference to fish communities, what advice would you offer to maintain the status of the river?

ii)

(30%)

3.

Write short notes on TWO of the following: (All parts are equally weighted) i) Advantages and disadvantages of using angler catch data for assessing the status of recreational fisheries. Impact of small-scale hydropower development on fisheries. Issues to be considered when designing a fish passage facility.

ii) iii)

4.

Stocking and...
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