Optimal sampling methods for modelling the occupancy of Arctic grayling (Thymallus arcticus) in the Canadian Barrenlands
dc.contributor.author | Swanson, Heidi K. | |
dc.contributor.author | Artym, Kyle | |
dc.contributor.author | Baker, Leanne F. | |
dc.date.accessioned | 2017-06-19T20:44:17Z | |
dc.date.available | 2017-06-19T20:44:17Z | |
dc.date.issued | 2017 | |
dc.description | © Canadian Science Publishing or its licensors. Baker, LF, KJ Artym and HK Swanson (2017). Optimal sampling methods for modelling the occupancy of Arctic grayling (Thymallus arcticus) in the Canadian Barrenlands. Canadian Journal of Fisheries and Aquatic Sciences. doi/10.1139/cjfas-2016-0429. Published by NRC Research Press, the final published version is available at: http://dx.doi.org/10.1139/cjfas-2016-0429 | en |
dc.description.abstract | In occupancy models, imperfect detectability of animals is usually corrected for by using temporally-repeated surveys to estimate probability of detection. Substituting spatial replicates for temporal replicates could be an advantageous sampling strategy in remote Arctic regions, but may lead to serious violations of model assumptions. Using a case study of site occupancy of adfluvial young-of-year Arctic Grayling in Barrenland tundra streams, we assessed reliability and efficiency of alternative sampling strategies; i) randomly distributed vs sequential adjacent spatial replicates; ii) visual vs electrofishing surveys; and, iii) spatial vs temporal replicates. Sequential, adjacent spatial replicates produced spatially auto-correlated data. Autocorrelation was relieved using randomly distributed spatial replicates, but using these randomly distributed spatial replicates introduced significant error into estimates of the probability of occupancy in streams. Models designed for spatially-autocorrelated data could minimize this bias. Visual and electrofishing surveys produced comparable probabilities of detection. Spatially-replicated surveys performed better than temporal replicates. The easiest and relatively most cost-effective sampling methods performed as well as, or better than, the more established, expensive, and logistically difficult alternatives for occupancy estimation. | en |
dc.description.sponsorship | De Beers Canada Ltd Natural Sciences and Engineering Research Council CRD || CRDPJ 469307 - 14 | en |
dc.identifier.uri | http://dx.doi.org/10.1139/cjfas-2016-0429 | |
dc.identifier.uri | http://hdl.handle.net/10012/12025 | |
dc.language.iso | en | en |
dc.publisher | Canadian Science Publishing | en |
dc.relation.ispartofseries | Canadian Journal of Fisheries and Aquatic Sciences; | |
dc.subject | Arctic Grayling | en |
dc.subject | Occupancy | en |
dc.subject | Barrenland Streams | en |
dc.title | Optimal sampling methods for modelling the occupancy of Arctic grayling (Thymallus arcticus) in the Canadian Barrenlands | en |
dc.type | Article | en |
dcterms.bibliographicCitation | Baker, LF, KJ Artym and HK Swanson (2017). Optimal sampling methods for modelling the occupancy of Arctic grayling (Thymallus arcticus) in the Canadian Barrenlands. Canadian Journal of Fisheries and Aquatic Sciences. doi/10.1139/cjfas-2016-0429 | en |
uws.contributor.affiliation1 | Faculty of Science | en |
uws.contributor.affiliation2 | Biology | en |
uws.peerReviewStatus | Reviewed | en |
uws.scholarLevel | Faculty | en |
uws.typeOfResource | Text | en |
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