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dc.contributor.authorPaudel, Shambhu
dc.contributor.authorKoprowski, John L
dc.contributor.authorCove, Michael V
dc.date.accessioned2021-05-04T01:54:10Z
dc.date.available2021-05-04T01:54:10Z
dc.date.issued2020-11-02
dc.identifier.citationPaudel, S., Koprowski, J. L., & Cove, M. V. (2020). Seasonal flow dynamics exacerbate overlap between artisanal fisheries and imperiled Ganges River dolphins. Scientific Reports, 10(1), 1-12.en_US
dc.identifier.issn2045-2322
dc.identifier.pmid33139770
dc.identifier.doi10.1038/s41598-020-75997-4
dc.identifier.urihttp://hdl.handle.net/10150/658117
dc.description.abstractHere we quantify the effects of artisanal fisheries on the ecology of a small cetacean, the Ganges River dolphin (Platanista gangetica gangetica, GRD), in a large river system of Nepal. We examine the size-classes of fisheries' catches, behavioural changes in GRD in response to fishing activities, and diel overlap between GRD and fishing activity. We observed high human exploitation rates (>60% of the total catch per effort) of GRD-preferred prey sizes, indicating risks of high resource competition and dietary overlap, especially during the low water season when resource availability is reduced. Competitive interactions in the feeding niches during the low water season, plus temporal overlap between the peak exploitation and critical life-history events (e.g., reproduction), likely have ecological consequences. Furthermore, we detected 48% (95% CI 43-52%) increase in the chance of behavioural changes among dolphins exposed to anthropopressure (fishing activity), risking social behaviour impairment in exposed dolphins. The higher diel overlap and increased diel coefficient as the surveys progressed towards the monsoon season suggest temporal shifts in GRD socio-behavioural states and seasonal effects on resource partitioning, respectively. This work identifies drivers of small cetaceans-fisheries interactions and their consequences, and can be used to help reduce biologically significant fishing impacts on small cetaceans. Mitigation strategies, together with river sanctuary and distanced-based approaches, should be urgently included in a framework of ecosystem-based management.en_US
dc.language.isoenen_US
dc.publisherNATURE RESEARCHen_US
dc.rights© The Author(s) 2020. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.en_US
dc.titleSeasonal flow dynamics exacerbate overlap between artisanal fisheries and imperiled Ganges River dolphinsen_US
dc.typeArticleen_US
dc.identifier.eissn2045-2322
dc.contributor.departmentUniv Arizona, Sch Nat Resources & Environmen_US
dc.identifier.journalSCIENTIFIC REPORTSen_US
dc.description.noteOpen access journalen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleScientific reports
dc.source.volume10
dc.source.issue1
dc.source.beginpage18798
dc.source.endpage
refterms.dateFOA2021-05-04T01:54:13Z
dc.source.countryEngland


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