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dc.contributor.authorBessesen, Brooke L.
dc.contributor.authorOedekoven, Cornelia S.
dc.contributor.authorGalbreath, Gary J.
dc.contributor.authorGonzález-Suárez, Manuela
dc.identifier.citationBessesen , B L , Oedekoven , C S , Galbreath , G J & González-Suárez , M 2022 , ' Population abundance and density estimates for Costa Rica’s endemic sea snake, Hydrophis platurus xanthos ' , Frontiers in Marine Science , vol. 9 , 924966 .
dc.identifier.otherPURE: 280812182
dc.identifier.otherPURE UUID: 0f7b22dc-64ad-4779-9856-c6f960945876
dc.identifier.otherJisc: 488508
dc.identifier.otherScopus: 85135157250
dc.identifier.otherORCID: /0000-0002-5610-7814/work/117212012
dc.identifier.otherWOS: 000834260800001
dc.descriptionOpen access publication fees were provided by the University of Reading.en
dc.description.abstractPopulation abundance and density estimates provide key information for conservation assessment and prioritization of efforts and management. However, data are still largely unavailable for many taxa, including sea snakes, which appear to be facing global declines. Here, we present the first quantitative abundance and density estimates for the geographically isolated sea snake Hydrophis platurus xanthos endemic to the inner basin of Golfo Dulce, Costa Rica. Using systematic distance sampling methods, we obtained and analyzed 199 snake detections from 46 transect lines covering the entire known distribution (totaling nine days and 469 km of effort). Our modeling methods accounted for (i) the probability of detecting a snake given it was available to be detected (ii) the average availability of snakes at the water surface during a 24-hr cycle, and (iii) the by-hour variance in the taxon’s activity pattern. The best estimate of population abundance was 29781 individuals (95% CI=20104–44115) with an estimated density of 76 snakes/km2. Without historical abundance estimates or minimum viable population size, it is unknown whether this number represents a healthy population. However, with all individuals inhabiting a relatively small inlet increasingly exposed to anthropogenic impacts, the long-term persistence of H. p. xanthos may be threatened by ongoing impacts (boat propeller strikes, agricultural runoff, and climate change), as well as unforeseen events in the future.
dc.relation.ispartofFrontiers in Marine Scienceen
dc.rightsCopyright © 2022 Bessesen, Oedekoven, Galbreath and González-Suárez. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.en
dc.subjectAbundance estimation modelsen
dc.subjectActivity biasen
dc.subjectAvailability biasen
dc.subjectDistance samplingen
dc.subjectGolfo Dulce yellow sea snakeen
dc.subjectHydrophis platurus xanthosen
dc.subjectLine transect surveyen
dc.subjectMarine reptileen
dc.subjectQH301 Biologyen
dc.titlePopulation abundance and density estimates for Costa Rica’s endemic sea snake, Hydrophis platurus xanthosen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Mathematics and Statisticsen
dc.contributor.institutionUniversity of St Andrews. Centre for Research into Ecological & Environmental Modellingen
dc.description.statusPeer revieweden

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