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Distribution of short-finned squid Illex argentinus (Cephalopoda: Ommastrephidae) inferred from the diets of Southern Ocean albatrosses using stable isotope analyses

  • José Seco (a1), Gustavo A. Daneri (a2), Filipe R. Ceia (a1), Rui Pedro Vieira (a1) (a3) (a4), Simeon L. Hill (a5) and José Carlos Xavier (a1) (a5)...


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°S 28°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 δ13C values in the range −18.77 to −15.28‰. This is consistent with δ13C values for Octopus tehuelchus, a typical species from the Patagonian Shelf. In contrast, Alluroteuthis antarcticus, a Southern Ocean squid, has typically Antarctic δ13C 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.


Corresponding author

Correspondence should be addressed to: J. Seco, Department of Life Sciences, Marine and Environmental Sciences Centre (MARE), University of Coimbra, 3001-401 Coimbra, Portugal email:


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Antonelis, G.A., Lowry, M.S., DeMaster, D.P. and Fiscus, C.H. (1987) Assessing northern elephant seal feeding habits by stomach lavage. Marine Mammal Science 3, 308322.
Arkhipkin, A.I. (2013) Squid as nutrient vectors linking Southwest Atlantic marine ecosystems. Deep-Sea Research II 95, 720.
Bustos, R.L., Daneri, G.A., Volpedo, A.V., Harrington, A. and Varela, E.A. (2014) Diet of the South American sea lion Otaria flavescens during the summer season at Río Negro, Patagonia, Argentina. Aquatic Biology 20, 235243.
Cherel, Y., Gasco, N. and Duhamel, G. (2011) Top predators and stable isotopes document the cephalopod fauna and its trophic relationships in Kerguelen waters. In Duhamel, G. and Welsford, D. (eds) The Kerguelen Plateau: marine ecosystem and fisheries. Paris: Société Française d'Ichtyologie, pp. 99108.
Cherel, Y. and Hobson, K.A. (2005) Stable isotopes, beaks and predators: a new tool to study the trophic ecology of cephalopods, including giant and colossal squids. Proceedings of the Royal Society B: Biological Sciences 272, 16011607.
Cherel, Y. and Hobson, K.A. (2007) Geographical variation in carbon stable isotope signatures of marine predators: a tool to investigate their foraging areas in the Southern Ocean. Marine Ecology Progress Series 329, 281287.
Chown, S.L., Huiskes, A.H., Gremmen, N.J., Lee, J.E., Terauds, A., Crosbie, K., Frenot, Y., Hughes, K.A., Imura, S. and Kiefer, K. (2012) Continent-wide risk assessment for the establishment of nonindigenous species in Antarctica. Proceedings of the National Academy of Sciences USA 109, 49384943.
Collins, M.A. and Rodhouse, P.G. (2006) Sourthern Ocean cephalopods. In Southward, A.J., Young, C.M. and Fuiman, L.A. (eds) Advances in marine biology, Volume 50. San Diego, CA: Academic Press, pp. 59250.
Daneri, G.A., Carlini, A.R. and Rodhouse, P.G. (2000) Cephalopod diet of the southern elephant seal, Mirounga leonina, at King George Island, South Shetland Islands. Antarctic Science 12, 1619.
Favero, M., Khatchikian, C.E., Arias, A., Silva Rodriguez, M.P., Cañete, G. and Mariano-Jelicich, R. (2003) Estimates of seabird by-catch along the Patagonian Shelf by Argentine longline fishing vessels, 1999–2001. Bird Conservation International 13, 273281.
Field, J.C., Baltz, K., Phillips, A.J. and Walker, W.A. (2007) Range expansion and trophic interactions of the jumbo squid, Dosidicus gigas, in the California Current. California Cooperative Oceanic Fisheries Investigations Report 48, 131.
Norman, M.D., Finn, J.K. and Hochberg, F.G. (2014) Family Octopodidae. In Jereb, P., Roper, C.F.E., Norman, M.D. and Finn, J.K. (eds) Cephalopods of the world. An annotated and illustrated catalogue of cephalopod species known to date. Volume 3. Octopods and vampire squids. Rome: FAO Species Catalogue for Fishery Purposes, pp. 36215.
Phillips, R.A., Ridley, C., Reid, K., Pugh, P.J.A., Tuck, G.N. and Harrison, N. (2010) Ingestion of fishing gear and entanglements of seabirds: monitoring and implications for management. Biological Conservation 143, 501512.
Phillips, R.A., Silk, J.R.D., Phalan, B., Catry, P. and Croxall, J.P. (2004) Seasonal sexual segregation in two Thalassarche albatross species: competitive exclusion, reproductive role specialization or foraging niche divergence? Proceedings of the Royal Society B: Biological Sciences 271, 12831291.
R Core Team (2013) R: A language and environment for statistical computing. Vienna: R Foundation for Statistical Computing. Retrieved from
Rodhouse, P.G. (1991) Population structure of Martialia hyadesi (Cephalopoda: Ommastrephidae) at the Antarctic Polar Front and the Patagonian Shelf, South Atlantic. Bulletin of Marine Science 49, 404418.
Rodhouse, P.G. (2008) Large-scale range expansion and variability in ommastrephid squid populations: a review of environmental links. California Cooperative Oceanic Fisheries Investigations Report 49, 8390.
Rodhouse, P.G. (2013) Role of squid in the Southern Ocean pelagic ecosystem and the possible consequences of climate change. Deep-Sea Research II 95, 129138.
Rodhouse, P.G., Clarke, M.R. and Murray, A. (1987) Cephalopod prey of the wandering albatross, Diomedea exulans . Marine Biology 96, 110.
Rodhouse, P.G., Dawe, E.G. and O'Dor, R.K. (1998) Squid recruitment dynamics: the genus Illex as a model, the commercial Illex species and influence on variability. Rome: Food and Agriculture Organization.
Rodhouse, P.G., Xavier, J.C. and Griffiths, H.J. (2014) Southern Ocean squid. In De Broyer, C., Koubbi, P., Griffiths, H.J., Raymond, B., Udekem d'Acoz, C.D., Van de Putte, A.P., Grant, S., Gutt, J., Held, C., Hosie, G., Huettmann, F., Post, A. and Ropert-Coudert, Y. (eds) Biogeographic atlas of the Southern Ocean. Cambridge: Scientific Committee on Antarctic Research, pp. 284289.
Roper, C.F.E., Sweeney, M.J. and Nauen, C.E. (1984) FAO species catalogue. Volume 3: Cephalopods of the world. An annotated and illustrated catalogue of species of interest to fisheries. FAO Fish Synopsis 3, 277.
Sacau, M., Pierce, G.J., Wang, J., Arkhipkin, A.I., Portela, J., Brickle, P., Santos, M.B., Zuur, A.F. and Cardoso, X. (2005) The spatio-temporal pattern of Argentine shortfin squid Illex argentinus abundance in the southwest Atlantic. Aquatic Living Resources 18, 361372.
Sakurai, Y., Kiyofuji, H., Saitoh, S., Goto, T. and Hiyama, Y. (2000) Changes in inferred spawning areas of Todarodes pacificus (Cephalopoda: Ommastrephidae) due to changing environmental conditions. ICES Journal of Marine Science 57, 2430.
Storero, L.P., Narvarte, M.A. and González, R.A. (2012) Reproductive traits of the small Patagonian octopus Octopus tehuelchus . Helgoland Marine Research 66, 651659.
Waluda, C.M., Griffiths, H.J. and Rodhouse, P.G. (2008) Remotely sensed spatial dynamics of the Illex argentinus fishery, Southwest Atlantic. Fisheries Research 91, 196202.
Xavier, J.C. and Cherel, Y. (2009) Cephalopod beak guide for the Southern Ocean. Cambridge: British Antarctic Survey.
Xavier, J.C., Croxall, J.P. and Reid, K. (2003a). Interannual variation in the diets of two albatross species breeding at South Georgia: implications for breeding performance. Ibis 145, 593610.
Xavier, J.C., Croxall, J.P., Trathan, P.N. and Wood, A.G. (2003b). Feeding strategies and diets of breeding grey-headed and wandering albatrosses at South Georgia. Marine Biology 143, 221232.
Xavier, J.C., Rodhouse, P.G. and Croxall, J.P. (2002) Unusual occurrence of Illex argentinus (Cephalopoda: Ommastrephidae) in the diet of albatrosses breeding at Bird Island, South Georgia. Bulletin of Marine Science 71, 11091112.
Xavier, J.C., Tarling, G.A. and Croxall, J. P. (2006) Determining prey distribution patterns from stomach-contents of satellite-tracked high-predators of the Southern Ocean. Ecography 29, 260272.
Xavier, J.C., Trathan, P.N., Croxall, J.P., Wood, A.G., Podesta, G. and Rodhouse, P.G. (2004) Foraging ecology and interactions with fisheries of wandering albatrosses (Diomedea exulans) breeding at South Georgia. Fisheries Oceanography 13, 324344.


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Distribution of short-finned squid Illex argentinus (Cephalopoda: Ommastrephidae) inferred from the diets of Southern Ocean albatrosses using stable isotope analyses

  • José Seco (a1), Gustavo A. Daneri (a2), Filipe R. Ceia (a1), Rui Pedro Vieira (a1) (a3) (a4), Simeon L. Hill (a5) and José Carlos Xavier (a1) (a5)...


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