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Artículo

Ontogenetic changes in the feeding strategy of Lepidonotothen nudifrons (Pisces, Nototheniidae) off the South Shetland islands and the Antarctic Peninsula

Blasina, Gabriela ElizabethIcon ; Lopez Cazorla, Andrea CeciliaIcon ; Deli Antoni, Mariana YanelIcon ; Bruno, Daniel OsvaldoIcon ; Delpiani, Sergio MatiasIcon ; Díaz de Astarloa, Juan MartínIcon
Fecha de publicación: 01/06/2017
Editorial: Wiley Blackwell Publishing, Inc
Revista: Polar Research
ISSN: 0800-0395
e-ISSN: 1751-8369
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Biológicas

Resumen

The diet and feeding strategy of Lepidonotothen nudifrons off the South Shetland Islands and the Antarctic Peninsula, as well as their variation in relation to ontogenetic stage (juvenile– adult) and sampling area, were determined by stomach contents analysis. Additionally, the trophic level of this species was estimated to determine its position within the Antarctic food web. Out of 247 specimens with prey in their stomachs, 144 were caught near the South Shetland Islands and 103 off the Antarctic Peninsula. Ontogenetic changes in the trophic ecology of L. nudifrons were observed in both areas and were mainly related to a decrease of copepods and an increase of euphausiids in the diet. The diet of juveniles from the South Shetland Islands was characterized by the dominance of calanoid copepods, followed by isopods and amphipods, whereas diet off the Antarctic Peninsula was dominated by amphipods and cyclopoid copepods. The diet in adults was dominated by amphipods and euphausiids in both areas. The specialization of individual predators on different prey types was observed when considering the whole population of L. nudifrons, but when ontogenetic stages were considered separately it showed a more mixed feeding strategy, with different dominant prey for each class. Although the trophic level increased with fish size, L. nudifrons can be classified as secondary consumer throughout its lifespan.
Palabras clave: Antarctic Fish Diet , Dominant Prey , Feeding Strategy , Food Web , Trophic Level , Zonerelated Changes
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/64514
DOI: https://doi.org/10.1080/17518369.2017.1331558
URL: https://www.tandfonline.com/doi/full/10.1080/17518369.2017.1331558
Colecciones
Articulos(CADIC)
Articulos de CENTRO AUSTRAL DE INVESTIGACIONES CIENTIFICAS
Articulos(CCT - BAHIA BLANCA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - BAHIA BLANCA
Articulos(IADO)
Articulos de INST.ARG.DE OCEANOGRAFIA (I)
Articulos(IIMYC)
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Citación
Blasina, Gabriela Elizabeth; Lopez Cazorla, Andrea Cecilia; Deli Antoni, Mariana Yanel; Bruno, Daniel Osvaldo; Delpiani, Sergio Matias; et al.; Ontogenetic changes in the feeding strategy of Lepidonotothen nudifrons (Pisces, Nototheniidae) off the South Shetland islands and the Antarctic Peninsula; Wiley Blackwell Publishing, Inc; Polar Research; 36; 1; 1-6-2017; 1-8
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