Siphonophores from surface waters of the Colombian Pacific Ocean

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dc.contributor.authorUribe-Palomino, Julian
dc.contributor.authorLópez, Raúl
dc.contributor.authorGibbons, Mark J.
dc.contributor.authorGusmão, Felipe
dc.contributor.authorRichardson, Anthony J.
dc.date.accessioned2018-02-24T13:51:38Z
dc.date.available2018-02-24T13:51:38Z
dc.date.issued2018
dc.description.abstractSiphonophores are colonial hydrozoans that feed on zooplankton including fish larvae, and occur throughout the world’s oceans from surface waters to ocean depths. Here we describe the composition of hyponeustonic siphonophores (0 – 3 m depth) from the tropical Colombian Pacific Ocean based on 131 plankton samples collected between June – October from 2001 – 2004. Samples were dominated by species of Calycophorae, with only three species of Physonectae identified, consistent with their deeper depth distribution. Muggiaea atlantica, Chelophyes contorta, Diphyes dispar, and Eudoxoides mitra were the most common of the 21 species identified. We found moderate structuring of the siphonophore community by the salinity gradient from inshore to offshore, and greater richness during the night because of diel vertical migration. Temperature did not play a significant role in structuring siphonophore communities, perhaps because of the narrow temperature range observed (3.5 8C). We extend the known temperature and salinity range of several species, including M. atlantica up to temperatures of 28.6 8C and salinities down to 24.7. Interestingly, only polygastric stages of M. atlantica were found, suggesting the reproductive stage of M. atlantica in tropical waters might be found in deeper waters. Chelophyes appendiculata was rare in our study and C. contorta was common, providing evidence they have a potential allopatric relationship, with C. contorta replacing C. appendiculata in warm water. Finally, we found siphonophore abundance was positively related to the abundance of copepods and fish eggs, with the top 13 most abundant species all having positive correlations, suggesting siphonophore abundances are tightly controlled by their food.en_US
dc.identifier.citationUribe-Palomino, J. et al. (2018). Siphonophores from surface waters of the Colombian pacific Ocean. Journal of the Marine biological Association of the United Kingdom, 2018en_US
dc.identifier.issn0025-3154
dc.identifier.urihttp://dx.doi.org/10.1017/S0025315417002065
dc.identifier.urihttp://hdl.handle.net/10566/3529
dc.language.isoenen_US
dc.privacy.showsubmitterFALSE
dc.publisherCambridge University Pressen_US
dc.rightsThis is the author-version of the article published online at: http://dx.doi.org/10.1017/S0025315417002065
dc.status.ispeerreviewedTRUE
dc.subjectGelatinous planktonen_US
dc.subjectTropical zooplanktonen_US
dc.subjectCnidarianen_US
dc.subjectBiogeographyen_US
dc.subjectHyponeustonen_US
dc.titleSiphonophores from surface waters of the Colombian Pacific Oceanen_US
dc.typeArticleen_US

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