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The effects of vessel traffic on the behavior patterns of common dolphins in the tagus estuary (Portugal)

2024Journal article Open access
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dc.contributor.authorSilva, M. M.
dc.contributor.authorAlves Jesus, Nádia
dc.contributor.authorCastro, Joana
dc.contributor.authorLuís, Ana Rita
dc.date.accessioned2024-11-20T20:32:56Z
dc.date.available2024-11-20T20:32:56Z
dc.date.issued2024
dc.description.abstractThe impact of vessels on dolphin populations has been extensively studied worldwide. The common dolphin, Delphinus delphis, has been observed in the Tagus estuary for the past two centuries, and during the last several years, these sightings seem to have increased. This area has high levels of maritime traffic throughout the year, both commercial and recreational. To understand the possible effects of vessel traffic on dolphins’ behavior, land-based observations were carried out from March 2022 to March 2023. For a total of 67 events (48.9 h of dolphin sightings), differences in behavioral budgets were noted. Although “neutral reaction” was the most observed response when vessels were in the vicinity of dolphins, “negative reaction” was also common and five times more abundant than “positive reaction”. The GEE model showed statistical differences between these reaction types (positive, neutral, and negative). Markov chains’ analysis revealed distinct patterns in the behavioral transition probabilities, as dolphins were more likely to switch to a traveling state when vessels were nearby. This study is the first step towards understanding a potential impact source in the area since it is expected that tourism companies expand due to the increase in dolphin sightings in the estuary.pt_PT
dc.description.sponsorshipFundação para a Ciência e Tecnologia - FCTpt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSilva, I. M., Jesus, N., Castro, J., & Luís, A. R. (2024). The Effects of Vessel Traffic on the Behavior Patterns of Common Dolphins in the Tagus Estuary (Portugal). Animals (2076-2615), 14(20), 2998. https://doi.org/10.3390/ani14202998pt_PT
dc.identifier.doi10.3390/ani14202998pt_PT
dc.identifier.issn20762615
dc.identifier.urihttp://hdl.handle.net/10400.12/10014
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPI Multidisciplinary Digital Publishing Institutept_PT
dc.relationUIDB/04292/2020pt_PT
dc.relationUIDP/04292/2020pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectBehavioral budgetspt_PT
dc.subjectCetaceanspt_PT
dc.subjectCommon dolphinspt_PT
dc.subjectDelphinus delphispt_PT
dc.subjectLand-based surveyspt_PT
dc.subjectMarkov chainpt_PT
dc.subjectPortugalpt_PT
dc.subjectTagus estuarypt_PT
dc.subjectVessel trafficpt_PT
dc.titleThe effects of vessel traffic on the behavior patterns of common dolphins in the tagus estuary (Portugal)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceSwitzerlandpt_PT
oaire.citation.issue20pt_PT
oaire.citation.startPage2998pt_PT
oaire.citation.titleAnimalspt_PT
oaire.citation.volume14pt_PT
person.familyNameSilva
person.familyNameAlves Jesus
person.familyNameCastro
person.familyNameLuís
person.givenNameManuel
person.givenNameNádia
person.givenNameJoana
person.givenNameAna Rita
person.identifier.ciencia-id7B11-4E54-5D0E
person.identifier.orcid0000-0002-1395-8061
person.identifier.orcid0009-0007-8953-9828
person.identifier.orcid0000-0001-7689-6411
person.identifier.orcid0009-0005-6876-6525
person.identifier.ridO-9436-2014
person.identifier.scopus-author-id35583823300
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication2b6ae42f-d42f-4194-8c62-f980b847ab7f
relation.isAuthorOfPublication2061f384-1b87-4115-8f84-7e455038cfab
relation.isAuthorOfPublicatione7febb91-2913-4dc7-b633-b735988bb2d1
relation.isAuthorOfPublication7e0731aa-b9c0-4d3e-a551-45d666d05ab9
relation.isAuthorOfPublication.latestForDiscovery2061f384-1b87-4115-8f84-7e455038cfab

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