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title Distribution of short-finned squid Illex argentinus (Cephalopoda: Ommastrephidae) inferred from the diets of Southern Ocean albatrosses using stable isotope analyses
authors Seco, J; Daneri, GA; Ceia, FR; Vieira, RP; Hill, SL; Xavier, JC
author full name Seco, Jose; Daneri, Gustavo A.; Ceia, Filipe R.; Vieira, Rui Pedro; Hill, Simeon L.; Xavier, Jose Carlos
title Distribution of short-finned squid Illex argentinus (Cephalopoda: Ommastrephidae) inferred from the diets of Southern Ocean albatrosses using stable isotope analyses
nationality internacional
source JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM
language English
document type Article
author keywords Trophic interactions; delta C-13; Thalassarche chrysostoma; Thalassarche melanophris; Diomeda exulans; Patagonian Shelf; Bird Island
keywords plus SOUTHWEST ATLANTIC; WANDERING ALBATROSSES; DIOMEDEA-EXULANS; PATAGONIAN SHELF; RANGE EXPANSION; ELEPHANT SEAL; GEORGIA; PREDATORS; ECOLOGY; ISLAND
abstract The diets of marine predators are a potential source of information about range shifts in their prey. For example, the short-finned squid Illex argentinus, a commercially fished species on the Patagonian Shelf in the South Atlantic, has been reported in the diet of grey-headed, Thalassarche chrysostoma; black-browed, T. melanophris; and wandering, Diomedea exulans, albatrosses breeding at Bird Island, South Georgia (54 degrees S 28 degrees W) in the Southern Ocean. Tracking data suggest that these birds may feed on I. argentinus while foraging in Southern Ocean waters during their breeding season. This led to the hypothesis that I. argentinus may occur south of the Antarctic Polar Front. To test this hypothesis, we used stable isotope analyses to assess the origin of I. argentinus. We compared I. argentinus beaks from the diets of the three albatross species with beaks of cephalopod species endemic to the Patagonian Shelf and others from the Southern Ocean. Our results show that I. argentinus from the diet of albatrosses at Bird Island have delta C-13 values in the range -18.77 to -15.28%. This is consistent with delta C-13 values for Octopus tehuelchus, a typical species from the Patagonian Shelf. In contrast, Alluroteuthis antarcticus, a Southern Ocean squid, has typically Antarctic delta C-13 in the range -25.46 to -18.61%. This suggests that I. argentinus originated from warmer waters of the Patagonian Shelf region. It is more likely that the albatross species obtained I. argentinus by foraging in the Patagonian Shelf region than that I. argentinus naturally occurs south of the Antarctic Polar Front.
author address [Seco, Jose; Ceia, Filipe R.; Vieira, Rui Pedro; Xavier, Jose Carlos] Univ Coimbra, Marine & Environm Sci Ctr MARE, Dept Life Sci, P-3001401 Coimbra, Portugal; [Daneri, Gustavo A.] Museo Argentino Ciencias Nat Bernardino Rivadavia, Div Mastozool, Buenos Aires, DF, Argentina; [Vieira, Rui Pedro] Univ Aveiro, Dept Biol, Campus Santiago, P-3810193 Aveiro, Portugal; [Vieira, Rui Pedro] Univ Aveiro, CESAM, Campus Santiago, P-3810193 Aveiro, Portugal; [Vieira, Rui Pedro] Univ Southampton, Natl Oceanog Ctr Southampton, Grad Sch, Waterfront Campus,European Way, Southampton SO14 3ZH, Hants, England; [Hill, Simeon L.; Xavier, Jose Carlos] British Antarctic Survey, NERC, High Cross,Madingley Rd, Cambridge CB3 0ET, England
reprint address Seco, J (reprint author), Univ Coimbra, Marine & Environm Sci Ctr MARE, Dept Life Sci, P-3001401 Coimbra, Portugal.
e-mail address joses.seco@gmail.com
funding agency and grant number Ministry of Science and Higher Education, Portugal (Fundacao para a Ciencia e a Tecnologia); British Antarctic Survey's Natural Environment Research Council core-funded Ecosystems programme; Scientific Committee for Antarctic Research (SCAR) AnT-ERA; Portuguese Polar Program PROPOLAR; Integrating Climate and Ecosystem Dynamics of the Southern Ocean (ICED); Portuguese Science Foundation [SFRH/BD/84030/2012]; European Funds through COMPETE; National Funds through the Portuguese Science Foundation (FCT) [PEst-C/MAR/LA0017/2013, SFRH/BPD/95372/2013]; Caixa Geral de Depositos Grant Programme 'Nova Geracao de Cientistas Polares'
funding text This research was supported by the Ministry of Science and Higher Education, Portugal (Fundacao para a Ciencia e a Tecnologia), the British Antarctic Survey's Natural Environment Research Council core-funded Ecosystems programme, the Scientific Committee for Antarctic Research (SCAR) AnT-ERA, Portuguese Polar Program PROPOLAR and Integrating Climate and Ecosystem Dynamics of the Southern Ocean (ICED). Rui P. Vieira was sponsored by the Caixa Geral de Depositos Grant Programme 'Nova Geracao de Cientistas Polares' and is currently supported by a doctoral grant from the Portuguese Science Foundation (SFRH/BD/84030/2012) and partially by European Funds through COMPETE and by National Funds through the Portuguese Science Foundation (FCT) within project PEst-C/MAR/LA0017/2013 and Filipe R. Ceia by a post-doctoral fellowship (SFRH/BPD/95372/2013).
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cited reference count 32
publisher CAMBRIDGE UNIV PRESS
publisher city NEW YORK
publisher address 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
issn 0025-3154
29-character source abbreviation J MAR BIOL ASSOC UK
iso source abbreviation J. Mar. Biol. Assoc. U.K.
publication date SEP
year published 2016
volume 96
issue 6
beginning page 1211
ending page 1215
digital object identifier (doi) 10.1017/S0025315415000752
page count 5
web of science category Marine & Freshwater Biology
subject category Marine & Freshwater Biology
document delivery number DS6PS
unique article identifier WOS:000380905100003