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Winter survival in wrasse - FC0110

Description
R&D Summary objective:- To investigate the winter physiological state of wrasse, including the effect of temperature and slainity and identify methods to improve their survival in winter through the development of refuges. Key customer purpose:- To find suitable methods to ensure good overwintering survival in wrasse used of the biological control of sea-lice in salmon aquaculture.
Objective
1) To compare survival and physiology of winter-caught wrasse subjected to conditions of low temperature and low salinity. Specifically: a) To determine salinity and temperature survival thresholds for corkwing and goldshinny wrasse, in order to compare with values previously obtained for the same species tested during the summer; b) To examine the bllof chemistry of winter-caught wrasse, and relate the results to the ability of wrasse to survive winter conditions in the wild. 2) To design and test refuges in relation to improving winter wrasse survival in Atlantic salmon netcages.
Time-Scale and Cost
From: 1994

To: 1995

Cost: £5,518
Contractor / Funded Organisations
Natural Environment Research Council
Keywords
Fisheries              
Impact              
Sea Fish Stocks              
Stock Assessment              
Stock Conservation              
Fields of Study
Fish Health and Aquaculture