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Age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni (Family Myctophidae) in the Scotia Sea, Southern Ocean

2020Journal article Restricted access
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dc.contributor.authorSaunders, Ryan A.
dc.contributor.authorLourenço, Sílvia
dc.contributor.authorVieira, Rui P.
dc.contributor.authorCollins, Martin A.
dc.contributor.authorAssis, Carlos A.
dc.contributor.authorXavier, Jose C.
dc.date.accessioned2020-08-12T10:50:11Z
dc.date.available2020-08-12T10:50:11Z
dc.date.issued2020
dc.description.abstractThis study examines age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni from the Scotia Sea in the Southern Ocean, through the analysis of annual growth increments deposited on sagittal otoliths. Otolith pairs from 177 G. braueri and 118 K. anderssoni were collected in different seasons from the region between 2004 and 2009. Otolith‐edge analysis suggested a seasonal change in opaque and hyaline depositions, indicative of an annual growth pattern, although variation within the populations of both species was apparent. Age estimates varied from 1 to 6 years for G. braueri (40 to 139 mm standard length; L s) and from 0 to 2 years for K. anderssoni (26 to 70 mm L s). Length‐at‐age data were broadly consistent with population cohort parameters identified in concurrent length‐frequency data from the region for both species. The estimated values of von Bertalanffy growth curves for G. braueri were L∞ = 133.22 mm, k = 0.29 year−1 and t 0 = − 0.21 year and the values for K. anderssoni were L∞ = 68.60 mm, k = 0.71 year−1 and t 0 = − 0.49 year. There were no significant (P  > 0.05) differences in growth between sexes for either species, suggesting that males and females have similar growth and development trajectories in the Scotia Sea. A positive allometric relationship between Ls and wet mass was found for each species, as well as a significant (P  < 0.0001) linear relationship between otolith size and L s. Growth performance (Ф ′) was similar between the two species and congruent with other myctophid species across the Southern Ocean. This study provides important parameters for future Southern Ocean ecosystem studies in a resource management context.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSaunders, R.A. & Lourenço, S. & Vieira, R.P. & Collins, A.M. & Assis, C.A. & Xavier, J.C. (2020). Age and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni (Family Myctophidae) in the Scotia Sea, Southern Ocean. Journal of Fish Biology. 96. 364-377. 10.1111/jfb.14206.pt_PT
dc.identifier.doi10.1111/jfb.14206pt_PT
dc.identifier.issn1095-8649
dc.identifier.urihttp://hdl.handle.net/10400.8/5069
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherWileypt_PT
dc.relationMARE - Marine and Environmental Sciences Centre
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectBody sizept_PT
dc.subjectGrowthpt_PT
dc.subjectMorphologypt_PT
dc.subjectMyctophidaept_PT
dc.subjectOtolithspt_PT
dc.subjectSouthern Oceanpt_PT
dc.titleAge and growth of Brauer's lanternfish Gymnoscopelus braueri and rhombic lanternfish Krefftichthys anderssoni (Family Myctophidae) in the Scotia Sea, Southern Oceanpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMARE - Marine and Environmental Sciences Centre
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMAR%2F04292%2F2019/PT
oaire.citation.endPage377pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage364pt_PT
oaire.citation.titleJournal of Fish Biologypt_PT
oaire.citation.volume96pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNamePereira Lourenço
person.givenNameSílvia Alexandra
person.identifier.ciencia-id1E12-4289-7CF3
person.identifier.orcid0000-0003-4426-0894
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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