Practical aspects of induced exercise in finfish aquaculture

Abstract

Sustained optimal exercise can improve the productivity, quality and welfare of farmed fish but the benefits of exercise are currently not being gained by the aquaculture industry. This chapter will address the issue by providing information on what we currently know about (1) fish swimming behaviour in aquaculture, (2) the amenability of different species to exercise and (3) the range of factors that serve to modify the response of fish to exercise. This knowledge will hopefully provide a platform on which exercise can be applied, in addition to guidance on when exercise should be encouraged and when it should be avoided. A review of the current literature suggests that farmed fish are not swimming at optimal levels for the greatest gains in productivity. Practical steps for the introduction of exercise across the current range of intensive holding facilities (i.e., tanks and seacages) are therefore provided. Some of these techniques are already in existence while others are either developing or based on future research concepts. There are many challenges for the implementation of exercise in aquaculture but the future benefits to all involved (farmers-consumers) are well worth striving for.