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Abstract:

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.

Registro:

Documento: Artículo
Título:Otolith morphology and feeding ecology of an Antarctic nototheniid, Lepidonotothen larseni
Autor:Curcio, N.; Tombari, A.; Capitanio, F.
Filiación:Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, 1428, Argentina
Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad de Buenos Aires, Argentina
Palabras clave:feeding habitats; Nototheniidae; otoliths; Southern Ocean icefish
Año:2013
Volumen:26
Número:2
Página de inicio:124
Página de fin:132
DOI: http://dx.doi.org/10.1017/S0954102013000394
Título revista:Antarctic Science
Título revista abreviado:Antarct. Sci.
ISSN:09541020
CODEN:ANTSE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v26_n2_p124_Curcio

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Citas:

---------- APA ----------
Curcio, N., Tombari, A. & Capitanio, F. (2013) . Otolith morphology and feeding ecology of an Antarctic nototheniid, Lepidonotothen larseni. Antarctic Science, 26(2), 124-132.
http://dx.doi.org/10.1017/S0954102013000394
---------- CHICAGO ----------
Curcio, N., Tombari, A., Capitanio, F. "Otolith morphology and feeding ecology of an Antarctic nototheniid, Lepidonotothen larseni" . Antarctic Science 26, no. 2 (2013) : 124-132.
http://dx.doi.org/10.1017/S0954102013000394
---------- MLA ----------
Curcio, N., Tombari, A., Capitanio, F. "Otolith morphology and feeding ecology of an Antarctic nototheniid, Lepidonotothen larseni" . Antarctic Science, vol. 26, no. 2, 2013, pp. 124-132.
http://dx.doi.org/10.1017/S0954102013000394
---------- VANCOUVER ----------
Curcio, N., Tombari, A., Capitanio, F. Otolith morphology and feeding ecology of an Antarctic nototheniid, Lepidonotothen larseni. Antarct. Sci. 2013;26(2):124-132.
http://dx.doi.org/10.1017/S0954102013000394