Use of biological reference points for the conservation of atlantic salmon (Salmo salar L.)in the River Lune, North West England.

Aprahamian, M.W. and Wyatt, R. and Shields, B. (2005) Use of biological reference points for the conservation of atlantic salmon (Salmo salar L.)in the River Lune, North West England. Warrington, UK, Environment Agency North West,

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Abstract

This paper deals with the development and use of biological reference points for salmon conservation on the River Lune, England. The Lune supports recreational and net fisheries with annual catches in the region of 1,000 and 1356 salmon respectively. Using models transported from other river systems, biological reference points exclusive to the Lune were developed; specifically the number of eggs deposited and carrying capacity estimates for age 0+ and 1+ parr. The conservation limit was estimated at 11.9 million eggs and between 1989 and 1998 was exceeded in two years. Comparison of juvenile salmon densities in 1991 and 1997 with estimates of carrying capacity indicated that 0+ and 1+ parr densities were at around 60 % of carrying capacity and may relate to the number of eggs deposited in 1990 and 1996 being approximately 70% of the target value. The paper discusses the management actions taken in order to ensure that the management target of the conservation limit being met four years out of five is delivered. It also discusses the balance between conservation and exploitation and the socio-economic decisions made in order to ensure parity of impacts on the rod and net fisheries. The regulations have been enforced since 1999 and the paper concludes with an assessment of the actions taken to deliver the management targets, over the last five years.

Item Type: Monograph or Serial Issue
Title: Use of biological reference points for the conservation of atlantic salmon (Salmo salar L.)in the River Lune, North West England.
Personal Creator/Author:
CreatorsEmail
Aprahamian, M.W.
Wyatt, R.
Shields, B.
Date: 2005
Publisher: Environment Agency North West
Place of Publication: Warrington, UK
Funders: Environment Agency Archives North West
Contact Email Address: dis@fba.org.uk
Issuing Agency: Environment Agency, UK (Freshwater Biological Association)
Additional Information: No date on publication. Date given is estimated guess.
Uncontrolled Keywords: England; Lune Catchment; Nature conservation; Salmo salar; Sport fishing; Juveniles; Population density; Fishery management
Subjects: Conservation
Fisheries
Limnology
Item ID: 8087
Depositing User: Hardy B Schwamm
Date Deposited: 01 Mar 2012 17:31
Last Modified: 01 Mar 2012 17:31
Related URLs:
URI: http://aquaticcommons.org/id/eprint/8087

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