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dc.contributor.authorAdame, Maria Fernanda
dc.contributor.authorJardine, Timothy D
dc.contributor.authorFry, Brian
dc.contributor.authorValdez, Dominic
dc.contributor.authorLindner, Garry
dc.contributor.authorNadji, Jonathan
dc.contributor.authorBunn, Stuart E
dc.date.accessioned2019-07-04T12:32:11Z
dc.date.available2019-07-04T12:32:11Z
dc.date.issued2018
dc.identifier.issn1932-6203
dc.identifier.doi10.1371/journal.pone.0197159
dc.identifier.urihttp://hdl.handle.net/10072/381287
dc.description.abstractThe estuarine crocodile (Crocodylus porosus) is one of the largest and most widespread crocodilians in the world. Although considered an apex species, the role of the estuarine crocodile in aquatic foodwebs is poorly understood; we know what crocodiles ingest, but not what nourishes them. In this study, we used a combination of stable isotope measurements (δ13C, δ15N, and δ34S) and direct feeding observations to identify the source of nutrition of estuarine crocodiles in Kakadu National Park, Northern Australia. Our results show that most crocodiles sampled (size 850 – 4200mm, with 76% of them being > 2.5 m) consume a large variety of prey, however a large proportion of their nutrition is derived from terrestrial prey. Introduced species such as water buffaloes (Bubalus bubalis) and pigs (Sus scrofa) could contribute between 53 and 84% to the nutrition of the sampled crocodiles. The isotopic composition of large crocodiles (total length > 3 m) suggested possible increase in marine prey consumption with size (R2 = 0.30; p = 0.005). Additionally, we found crocodiles sampled in the dry season had on average higher terrestrial contributions compared to crocodiles sampled during the wet season (84.1 ± 2.4% versus 55.4 ± 7.0%). Overall, we found that terrestrial prey are important source of nutrition for many crocodiles in this region where introduced herbivorous mammals are abundant.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherPublic Library of Sciences
dc.publisher.placeUnited States
dc.relation.ispartofpagefrom1
dc.relation.ispartofpageto16
dc.relation.ispartofissue6
dc.relation.ispartofjournalPLoS One
dc.relation.ispartofvolume13
dc.subject.fieldofresearchEcology not elsewhere classified
dc.subject.fieldofresearchcode060299
dc.titleEstuarine crocodiles in a tropical coastal floodplain obtain nutrition from terrestrial prey
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dcterms.licensehttp://creativecommons.org/licenses/by/4.0/
dc.description.versionVersion of Record (VoR)
gro.facultyGriffith Sciences, School of Environment and Science
gro.rights.copyright© 2018 Adame et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
gro.hasfulltextFull Text
gro.griffith.authorBunn, Stuart E.
gro.griffith.authorValdez, Dominic
gro.griffith.authorFry, Brian D.
gro.griffith.authorAdame Vivanco, Fernanda
gro.griffith.authorJardine, Timothy


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