Otolith morphology and feeding ecology of an Antarctic nototheniid, Lepidonotothen larseni
This study is based on the analysis of the stomach content and the morphology and morphometry of the three pairs of otoliths (sagitta, asteriscus and lapillus) of Lepidonotothen larseni (Lönnberg) collected at the South Shetland Islands and Antarctic Peninsula during summer, in order to find possibl...
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ftunibueairesbd:paper:paper_09541020_v26_n2_p124_Curcio 2023-05-15T13:50:11+02:00 Otolith morphology and feeding ecology of an Antarctic nototheniid, Lepidonotothen larseni Curcio, Nadia Soledad Tombari, Andrea Diana Capitanio, Fabiana Lía 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v26_n2_p124_Curcio https://hdl.handle.net/20.500.12110/paper_09541020_v26_n2_p124_Curcio unknown https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v26_n2_p124_Curcio http://hdl.handle.net/20.500.12110/paper_09541020_v26_n2_p124_Curcio feeding habitats Nototheniidae otoliths Southern Ocean icefish 2013 ftunibueairesbd https://doi.org/20.500.12110/paper_09541020_v26_n2_p124_Curcio 2023-02-16T02:21:28Z This study is based on the analysis of the stomach content and the morphology and morphometry of the three pairs of otoliths (sagitta, asteriscus and lapillus) of Lepidonotothen larseni (Lönnberg) collected at the South Shetland Islands and Antarctic Peninsula during summer, in order to find possible relationships between ontogenetic change of sagittal otolith shape and feeding ecology. Length-weight relationship resulted in a positive allometric growth, with juveniles and adults in good nutritional condition (Le Cren condition index > 1), and with a decreasing trend from noon to late evening of the stomach repletion index. The stomach content consisted of several prey, with copepods and amphipods more frequent and abundant in juveniles, whereas euphausiids were in adults. The morphometric analysis of otoliths enabled us to relate different measurements with fish size, and those contributing mostly to separate juveniles from adults were the otolith and rostrum length and their percentage (R index). Juveniles proportionally showed a shorter and wider sagitta than adults reflected in a major E index because of a rounded shape and a minor R index because of a less developed rostrum. This pattern can be tentatively linked to the different habitat of juveniles and adults of this species, being respectively pelagic and epibenthic, as also evidenced by the ontogenetic change of feeding habits. Copyright © Antarctic Science Ltd 2013. Fil:Curcio, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tombari, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Capitanio, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Other/Unknown Material Antarc* Antarctic Antarctic Peninsula Icefish South Shetland Islands Southern Ocean Copepods Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) Antarctic Antarctic Peninsula Argentina South Shetland Islands Southern Ocean |
institution |
Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
language |
unknown |
topic |
feeding habitats Nototheniidae otoliths Southern Ocean icefish |
spellingShingle |
feeding habitats Nototheniidae otoliths Southern Ocean icefish Curcio, Nadia Soledad Tombari, Andrea Diana Capitanio, Fabiana Lía Otolith morphology and feeding ecology of an Antarctic nototheniid, Lepidonotothen larseni |
topic_facet |
feeding habitats Nototheniidae otoliths Southern Ocean icefish |
description |
This study is based on the analysis of the stomach content and the morphology and morphometry of the three pairs of otoliths (sagitta, asteriscus and lapillus) of Lepidonotothen larseni (Lönnberg) collected at the South Shetland Islands and Antarctic Peninsula during summer, in order to find possible relationships between ontogenetic change of sagittal otolith shape and feeding ecology. Length-weight relationship resulted in a positive allometric growth, with juveniles and adults in good nutritional condition (Le Cren condition index > 1), and with a decreasing trend from noon to late evening of the stomach repletion index. The stomach content consisted of several prey, with copepods and amphipods more frequent and abundant in juveniles, whereas euphausiids were in adults. The morphometric analysis of otoliths enabled us to relate different measurements with fish size, and those contributing mostly to separate juveniles from adults were the otolith and rostrum length and their percentage (R index). Juveniles proportionally showed a shorter and wider sagitta than adults reflected in a major E index because of a rounded shape and a minor R index because of a less developed rostrum. This pattern can be tentatively linked to the different habitat of juveniles and adults of this species, being respectively pelagic and epibenthic, as also evidenced by the ontogenetic change of feeding habits. Copyright © Antarctic Science Ltd 2013. Fil:Curcio, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tombari, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Capitanio, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. |
author |
Curcio, Nadia Soledad Tombari, Andrea Diana Capitanio, Fabiana Lía |
author_facet |
Curcio, Nadia Soledad Tombari, Andrea Diana Capitanio, Fabiana Lía |
author_sort |
Curcio, Nadia Soledad |
title |
Otolith morphology and feeding ecology of an Antarctic nototheniid, Lepidonotothen larseni |
title_short |
Otolith morphology and feeding ecology of an Antarctic nototheniid, Lepidonotothen larseni |
title_full |
Otolith morphology and feeding ecology of an Antarctic nototheniid, Lepidonotothen larseni |
title_fullStr |
Otolith morphology and feeding ecology of an Antarctic nototheniid, Lepidonotothen larseni |
title_full_unstemmed |
Otolith morphology and feeding ecology of an Antarctic nototheniid, Lepidonotothen larseni |
title_sort |
otolith morphology and feeding ecology of an antarctic nototheniid, lepidonotothen larseni |
publishDate |
2013 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v26_n2_p124_Curcio https://hdl.handle.net/20.500.12110/paper_09541020_v26_n2_p124_Curcio |
geographic |
Antarctic Antarctic Peninsula Argentina South Shetland Islands Southern Ocean |
geographic_facet |
Antarctic Antarctic Peninsula Argentina South Shetland Islands Southern Ocean |
genre |
Antarc* Antarctic Antarctic Peninsula Icefish South Shetland Islands Southern Ocean Copepods |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Icefish South Shetland Islands Southern Ocean Copepods |
op_relation |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v26_n2_p124_Curcio http://hdl.handle.net/20.500.12110/paper_09541020_v26_n2_p124_Curcio |
op_doi |
https://doi.org/20.500.12110/paper_09541020_v26_n2_p124_Curcio |
_version_ |
1766253174194176000 |