00000cam 2200000zi 4500 9.964851 CaOODSP 20260806091753 m o d f cr mn||||||||| 260806t20122012bccab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc pn----- y1y1 Fs97-4/3005E-PDF Ma, B. O., 1978- author. Estimating effort from instantaneous counts : a comparison of analysis approaches using 2010 Victoria area recreational survey data / by B.O. Ma, D.C. Pickard, and D.S. O'Brien. Nanaimo, British Columbia : Fisheries and Oceans Canada, South Coast Salmon Stock Assessment, 2012. ©2012 1 online resource (viii, 44 pages) : illustrations (some colour), colour maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, 1488-5387 ; 3005 Includes bibliographical references (page 9). "We performed a preliminary examination, using the 2010 Victoria area recreational creel survey data, to determine if more precise estimates of catch, CPE, and effort could be obtained by stratifying the data beyond the methods currently used. We focused our analysis on calculating activity profiles, which are then used to estimate daily effort from effort counts obtained from aerial surveys. Current methods generate activity profiles that are based on relatively coarse-scale geographical gradients. In the Victoria area this means using interview data across all surveyed access sites to develop activity profiles. We explored the possibility of stratifying the current interview data to generate more sub-area specific activity profiles in three ways. First, we generated activity profiles based on interview data from only landing sites specific to the subarea of interest. Second, we generated activity profiles based on interview data information based on targeted subarea fished. Third, we generated activity profiles based on species targeted by a particular fishing party. We evaluate approaches using effort and the catch of the most desired species in the area – chinook salmon (Onchorhynchus tshawytscha) and halibut (Hippoglossus stenolepsis). The results indicate that utilizing any of the three methods proposed in this study generally do not improve the precision of the catch and effort estimates relative to the current method. This is despite the relatively large interview sample sizes associated with this area. This study suggests that despite the coarse-scale geographical range over which activity profiles are generated, there is no consistent increase in precision by stratifying the data according to landing sites specific to subareas. Furthermore, incorporating information from fishing party interviews such as the targeted subarea and targeted species did not improve precision of catch or effort estimates. Thus, our results suggest that incorporating this information into current analysis methods will not lead to better estimates of catch and effort. However, we highlight additional areas where analysis methodology should be further reviewed"--Abstract, page vi. Includes abstracts in English and French. Fishing Catch effort British Columbia Victoria Region Statistical methods. Chinook salmon fishing British Columbia Victoria Region Statistical methods. Pacific halibut fishing British Columbia Victoria Region Statistical methods. Pêche sportive Mortalité par pêche Colombie-Britannique Victoria, Région de Méthodes statistiques. Saumon quinnat Pêche sportive Colombie-Britannique Victoria, Région de Méthodes statistiques. Flétan du Pacifique Pêche sportive Colombie-Britannique Victoria, Région de Méthodes statistiques. Canada. Department of Fisheries and Oceans, issuing body. Canada. Department of Fisheries and Oceans. South Coast Area. Stock Assessment, issuing body. Estimating effort from instantaneous counts : (CaOODSP)9.620488 Canadian manuscript report of fisheries and aquatic sciences, 1488-5387 ; 3005. (CaOODSP)9.505211 PDF 2.60 MB https://publications.gc.ca/collections/collection_2026/mpo-dfo/fs97-4/Fs97-4-3005-eng.pdf