Review of opportunities for low stress and selective control of fish

Routine inspection and selective control of livestock is an integral part o f animal agriculture benefiting both animal welfare and profitability. Appr opriate developments in this field may therefore also be expected within fi n-fish farming. Equipment enabling some subsurface inspection of fish stock s has recently appeared on the market but this is as yet unmatched by equip ment which would enable subsurface selective interaction for the purpose of sampling, further inspection or selective application of remedial measures . Currently available non-selective fish control techniques are reviewed an d some potential methods for selective control are considered. Since most f orms of selective control must rely on fish's response to signals the paper is organised on the basis of the sensory systems that might be used. A bri ef introduction to each system is given followed by a review of any current control techniques and possibilities for developing selective control syst ems. (C) 1999 Elsevier Science B.V. All rights reserved.