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Life cycle, distribution and trophodynamics of the lanternfish Krefftichthys anderssoni (Lönnberg, 1905) in the Scotia Sea

2016Journal article Restricted access
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dc.contributor.authorLourenço, Sílvia
dc.contributor.authorSaunders, Ryan A.
dc.contributor.authorCollins, Martin
dc.contributor.authorShreeve, Rachel
dc.contributor.authorAssis, Carlos
dc.contributor.authorBelchier, Mark
dc.contributor.authorWatkins, Jonathan L.
dc.contributor.authorXavier, Jose
dc.date.accessioned2019-06-25T09:44:01Z
dc.date.available2019-06-25T09:44:01Z
dc.date.issued2016
dc.description.abstractMyctophid fish play an important role in the Southern Ocean pelagic food web. The lanternfish Krefftichthys anderssoni is one of the most common myctophids in the region, but its ecology is poorly known. This study examines spatial and temporal patterns in the species distribution of density, life cycle, population structure and diet using samples collected by mid-water trawl nets deployed in different seasons across the Scotia Sea. Virtually absent from the sea-ice zone, the species was most abundant in the northern Scotia Sea around the Georgia Basin at depths below 400 m that are associated with the Circumpolar Deep Water. The species migrated during night from waters deeper than 700 m to waters above the 400 m following their main prey species: the copepods Rhincalanus gigas and Calanoides acutus and euphausiids of the Thysanoessa genus. Larvae length distribution and post-larvae length-frequency analyses suggested a life cycle of ~ 3 years with spawning and recruitment strongly connected with APF and the South Georgia shelf. Our results show that species spatial distribution, population structure and diet changed both seasonally and ontogenetically. This study is the most comprehensive examination of the ecology of K. anderssoni in the Southern Ocean to date and contributes to resolving how pelagic food webs and ecosystems operate in the region.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1007/s00300-016-2046-3pt_PT
dc.identifier.issn0722-4060
dc.identifier.urihttp://hdl.handle.net/10451/38787
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectSouthern Oceanpt_PT
dc.subjectMyctophidspt_PT
dc.subjectDistributionpt_PT
dc.subjectTrophic ecologypt_PT
dc.titleLife cycle, distribution and trophodynamics of the lanternfish Krefftichthys anderssoni (Lönnberg, 1905) in the Scotia Seapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1245pt_PT
oaire.citation.issue6pt_PT
oaire.citation.startPage1229pt_PT
oaire.citation.titlePolar Biologypt_PT
oaire.citation.volume40pt_PT
person.familyNameLourenço
person.familyNameAssis
person.familyNameXavier
person.givenNameSílvia
person.givenNameCarlos
person.givenNameJose
person.identifier415240
person.identifier.ciencia-id1E12-4289-7CF3
person.identifier.ciencia-idF313-400D-255D
person.identifier.ciencia-id251D-BCC0-F412
person.identifier.orcid0000-0003-4426-0894
person.identifier.orcid0000-0001-5352-2978
person.identifier.orcid0000-0002-9621-6660
person.identifier.ridJ-2302-2012
person.identifier.scopus-author-id56357779700
person.identifier.scopus-author-id6602071581
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication06309729-c5af-46cc-87aa-134a8d917141
relation.isAuthorOfPublication13e64c61-4d45-4a98-81b0-eba5ef411c00
relation.isAuthorOfPublicationd93439e8-9dfa-44c8-a421-6905a9e3f127
relation.isAuthorOfPublication.latestForDiscovery13e64c61-4d45-4a98-81b0-eba5ef411c00

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