00000cam 2200000zi 4500 9.964368 CaOODSP 20260720145216 m o d f cr mn||||||||| 260720t20002000bccab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc pn----- x8x9 Fs97-4/2541E-PDF Fs97-4/2541E Hand, C. M., author. A survey of geoduck populations in the Griffith Harbour area, north Banks Island, in August 1995 / C.M. Hand and G. Dovey. Nanaimo, British Columbia : Fisheries and Oceans Canada, Science Branch, Pacific Region, Pacific Biological Station, 2000. ©2000 1 online resource (vi, 20 pages) : illustrations, map. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, 0706-6473 ; 2541 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (pages 10-12). "A survey of the geoduck (Panopea abrupta) population in the Griffith Harbour area on northwest Banks Island, British Columbia, was conducted by the Underwater Harvesters Association and Fisheries and Oceans Canada in August, 1995. The purpose of the survey was to estimate the density of geoducks in the general area of reported beds and to verify the location of commercial beds. Survey densities are used to calculate quotas for the geoduck fishery. A total of 48 systematically-placed transects were completed over 150 hectares of subtidal seabed in the Griffith Harbour area. Transects were post-stratified into four sites, each of which constituted a more or less continuous geoduck bed. Mean geoduck density was estimated to be 1.7/m2 , 2.8/m², 4.2/m² and 0.2/m² for Sites 1 to 4, respectively. Site 4 was excluded from calculations for overall density because it was a rocky reef and not suitable habitat for geoducks. Site 3 contained some extremely high geoduck densities, in the order of 30/m². The mean density for Site 3 excluding these extreme data was 2.4/m². Sites 1, 2 and 3 were combined to estimate overall density for use in quota calculations. The mean overall density of geoducks in Griffith Harbour beds was 2.9/m² with a 95% confidence interval of 1.9/m² - 4. 1/m². With extreme data from Site 3 excluded, the estimate was 2.2/m² (95% CI 1.6-3.0/m²). These density estimates were 61% and 22% greater than the previous estimate of 1.8/m² used to calculate quotas prior to this survey. Use of the lower density estimate is recommended for this area, and especially if survey densities are to be extrapolated to other, unsurveyed geoduck beds"--Abstract, page v. Includes abstracts in English and French. Pacific geoduck British Columbia Banks Island. Clam populations British Columbia Banks Island. Invertebrate surveys British Columbia Banks Island. Panope du Pacifique Colombie-Britannique Banks, Île de. Myes Populations Colombie-Britannique Banks, Île de. Invertébrés Inventaires Colombie-Britannique Banks, Île de. Canada. Department of Fisheries and Oceans, issuing body. Pacific Biological Station (1972- ), issuing body. Canadian manuscript report of fisheries and aquatic sciences ; 2541. (CaOODSP)9.505211 PDF 1.43 MB https://publications.gc.ca/collections/collection_2026/mpo-dfo/fs97-4/Fs97-4-2541-eng.pdf