Show simple item record

Files in this item


Item metadata

dc.contributor.authorJaramillo-Legorreta, Armando
dc.contributor.authorCardenas-Hinojosa, Gustavo
dc.contributor.authorNieto-Garcia, Edwyna
dc.contributor.authorRojas-Bracho, Lorenzo
dc.contributor.authorHoef, Jay Ver
dc.contributor.authorMoore, Jeffrey
dc.contributor.authorTregenza, Nicholas
dc.contributor.authorBarlow, Jay
dc.contributor.authorGerrodette, Tim
dc.contributor.authorThomas, Len
dc.contributor.authorTaylor, Barbara
dc.identifier.citationJaramillo-Legorreta , A , Cardenas-Hinojosa , G , Nieto-Garcia , E , Rojas-Bracho , L , Hoef , J V , Moore , J , Tregenza , N , Barlow , J , Gerrodette , T , Thomas , L & Taylor , B 2017 , ' Passive acoustic monitoring of the decline of Mexico's critically endangered vaquita ' , Conservation Biology , vol. 31 , no. 1 , pp. 183-191 .
dc.identifier.otherBibtex: urn:0de88fe8feeef85006ad9beeb1778e89
dc.identifier.otherORCID: /0000-0002-7436-067X/work/29591648
dc.descriptionDifferent institutions and agencies have provided funding during the development and implementation of the acoustic monitoring program.en
dc.description.abstractThe vaquita (Phocoena sinus) is the world's most endangered marine mammal with ≈245 individuals remaining in 2008. This species of porpoise is endemic to the northern Gulf of California, Mexico, and has historically suffered population declines from unsustainable bycatch in gillnets. An illegal gillnet fishery for an endangered fish, the totoaba (Totoaba macdonaldi), has recently resurged throughout the vaquita's range. The secretive but lucrative wildlife trade with China for totoaba swim bladders has probably increased vaquita bycatch mortality, but by an unknown amount. Precise population monitoring by visual surveys is difficult because vaquitas are inherently hard to see and have now become so rare that sighting rates are very low. However, their echolocation clicks can be identified readily on specialized acoustic detectors. Acoustic detections on an array of 46 moored detectors indicate that vaquita acoustic activity declined by 80% between 2011 and 2015 in the central part of the species’ range. Statistical models estimate an annual rate of decline of 34% (95% Bayesian Credible Interval -48% to -21%). Based on preliminary acoustic monitoring results from 2011–2014 the Government of Mexico enacted and is enforcing an emergency 2-year ban of gillnets throughout the species’ range to prevent extinction, at a cost of $74 million USD to compensate fishers. Developing precise acoustic monitoring methods proved critical to exposing the severity of vaquitas’ decline and emphasizes the need for continual monitoring to effectively manage critically endangered species.
dc.relation.ispartofConservation Biologyen
dc.subjectPhocoena sinusen
dc.subjectPopulation declineen
dc.subjectStatistical modelingen
dc.subjectGE Environmental Sciencesen
dc.subjectQA Mathematicsen
dc.subjectQH301 Biologyen
dc.subjectSDG 14 - Life Below Wateren
dc.titlePassive acoustic monitoring of the decline of Mexico's critically endangered vaquitaen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. Statisticsen
dc.contributor.institutionUniversity of St Andrews. School of Mathematics and Statisticsen
dc.contributor.institutionUniversity of St Andrews. Marine Alliance for Science & Technology Scotlanden
dc.contributor.institutionUniversity of St Andrews. Centre for Research into Ecological & Environmental Modellingen
dc.description.statusPeer revieweden

This item appears in the following Collection(s)

Show simple item record