Research Document 1998/168
Factors affecting the health of farmed and wild fish populations: a perspective from British Columbia
By S. St. Hilaire, M. Kent, and G. Iwama
Abstract
With the increase of mariculture, particularly netpen rearing of salmonids, has come the need to address whether these operations have a significant impact on coastal marine environments. Models have been made to assess this impact, but these models have not considered the potential risk of increased disease in wild fisheries that mariculture may impose. At this time, much of the information needed to create models to assess the impact of farmed fish diseases on wild fish populations is not available. The transmission and development of disease is a complex process that involves numerous factors that affect the host, the pathogen, and their environment. The following paper describes some of these factors and compares their occurrence in wild and farmed salmonids.
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