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Review of potential line-transect methodologies for estimating abundance of dolphin stocks in the eastern tropical Pacific
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dc.contributor.author | Lennert-Cody, Cleridy E. | |
dc.contributor.author | Buckland, Stephen T. | |
dc.contributor.author | Gerrodette, Tim | |
dc.contributor.author | Webb, Andrew | |
dc.contributor.author | Barlow, Jay | |
dc.contributor.author | Fretwell, Peter T. | |
dc.contributor.author | Maunder, Mark N. | |
dc.contributor.author | Kitakado, Toshihide | |
dc.contributor.author | Moore, Jeffrey E. | |
dc.contributor.author | Scott, Michael D. | |
dc.contributor.author | Skaug, Hans J. | |
dc.date.accessioned | 2019-08-16T14:30:05Z | |
dc.date.available | 2019-08-16T14:30:05Z | |
dc.date.issued | 2019-01-25 | |
dc.identifier | 260615648 | |
dc.identifier | 32d805f9-6d84-4dbe-b333-629a79cbad56 | |
dc.identifier | 85069738736 | |
dc.identifier.citation | Lennert-Cody , C E , Buckland , S T , Gerrodette , T , Webb , A , Barlow , J , Fretwell , P T , Maunder , M N , Kitakado , T , Moore , J E , Scott , M D & Skaug , H J 2019 , ' Review of potential line-transect methodologies for estimating abundance of dolphin stocks in the eastern tropical Pacific ' , Journal of Cetacean Research and Management , vol. 19 , pp. 9-21 . < https://archive.iwc.int/?r=7931 > | en |
dc.identifier.issn | 1561-0713 | |
dc.identifier.uri | https://hdl.handle.net/10023/18324 | |
dc.description.abstract | A twelve-year hiatus in fishery-independent marine mammal surveys in the eastern tropical Pacific Ocean (ETP), combined with a mandate to monitor dolphin stock status under international agreements and the need for reliable stock status information to set dolphin bycatch limits in the tuna purse-seine fishery, has renewed debate about how best to assess and monitor ETP dolphin stock status. The high cost of replicating previous ship-based surveys has intensified this debate. In this review, transect methods for estimating animal abundance from dedicated research surveys are considered, with a focus on both contemporary and potential methods suitable for surveying large areas for dolphin species that can form large, multi-species aggregations. Covered in this review are potential improvements to the previous ship-based survey methodology, other ship-based methods, alternative approaches based on high-resolution imagery and passive acoustics, and combinations of ship-based and alternative approaches. It is concluded that for immediate management needs, ship-based surveys, with some suggested modifications to improve precision, are the only reliable option despite their high cost. However, it is recommended that a top research priority should be development of composite methods. Pilot studies on the use of high-resolution imagery and passive acoustics for development of indices of relative abundance to be used in composite methods should be part of any future ship-based survey efforts. | |
dc.format.extent | 13 | |
dc.format.extent | 398916 | |
dc.language.iso | eng | |
dc.relation.ispartof | Journal of Cetacean Research and Management | en |
dc.subject | Abundance estimate | en |
dc.subject | Index of abundance | en |
dc.subject | Trends | en |
dc.subject | Survey-vessel | en |
dc.subject | Survey-aerial | en |
dc.subject | Survey-acoustic | en |
dc.subject | Survey-combined | en |
dc.subject | QH301 Biology | en |
dc.subject | SH Aquaculture. Fisheries. Angling | en |
dc.subject | Animal Science and Zoology | en |
dc.subject | Aquatic Science | en |
dc.subject | Ecology, Evolution, Behavior and Systematics | en |
dc.subject | SDG 14 - Life Below Water | en |
dc.subject.lcc | QH301 | en |
dc.subject.lcc | SH | en |
dc.title | Review of potential line-transect methodologies for estimating abundance of dolphin stocks in the eastern tropical Pacific | en |
dc.type | Journal item | en |
dc.contributor.institution | University of St Andrews. Statistics | en |
dc.contributor.institution | University of St Andrews. Marine Alliance for Science & Technology Scotland | en |
dc.contributor.institution | University of St Andrews. Scottish Oceans Institute | en |
dc.contributor.institution | University of St Andrews. St Andrews Sustainability Institute | en |
dc.contributor.institution | University of St Andrews. Centre for Research into Ecological & Environmental Modelling | en |
dc.description.status | Peer reviewed | en |
dc.identifier.url | https://archive.iwc.int/pages/search.php?search=%21collection15&k= | en |
dc.identifier.url | https://archive.iwc.int/?r=7931 | en |
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