Research Document - 2002/126
Survey protocol for the removal of allowable numbers of northern abalone, Haliotis kamtschatkana, for use as broodstock in aquaculture in British Columbia
By Lessard, J., Campbell, A., and Hajas, W.
Abstract
A survey protocol and methodology to determine abalone abundance have been in use for the last three years. The present paper reviews the data collected during 6 surveys for broodstock purposes and uses these data to determine the appropriate level of removal. The proposed survey protocol and broodstock removal considerations are discussed.
These surveys provide little evidence of recovery of abalone populations. During abalone broodstock collections, more abalone were harvested than the allowable 1% of the calculated population under the initial protocol at several sites.
As part of a precautionary approach, the recommended maximum number of abalone to be removed for broodstock is 1% of the lower 90% confidence limit on the estimated population in the size range of 81-120 mm shell length. Abalone is a threatened species and all removal of abalone from the wild should be carefully considered.
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