COSEWIC Assessment and Update Status Report on the Northern Abalone Haliotis kamtschatkana in Canada
Assessment and Update Status Report on the Northern Abalone Haliotis kamtschatkana in Canada
See the PDF: bcabalone
Reasons for Designation:
Highly valued for its meat, this marine mollusc is patchily distributed along the west coast of Canada. Despite a total moratorium on harvest in 1990, the species was designated as Threatened in 2000. Poaching is the most serious threat and continues to reduce population abundance, particularly the larger, more fecund component; however, all size classes have declined significantly over the past three generations (i.e. since 1978) with mature individuals declining an estimated 88-89%. Low densities may further exacerbate the problem by reducing fertilization success in this broadcast spawner (the Allee effect). Although predators such as the recovering Sea Otter population are not responsible for recently observed declines, they may ultimately influence future abundance of abalone populations.
Note reference to paper done with research at Race Rocks ER #97
- Wallace, S.S. 1999. Evaluating the effects of three forms of marine reserve on Northern Abalone populations in British Columbia, Canada. Conservation Biology 13:882- 887.