Temporal shift in the isotopic niche of female Antarctic fur seals from Bouvetøya

References

• Allan L.E., Froneman W.P., Durgadoo J.V., McQuaid C.D., Ansorge I.J., Richoux N.B. Critical indirect effects of climate change on sub-Antarctic ecosystem functioning. Ecology and Evolution. 2013; 3: 2994–3004.
   PubMed Web of Science ®Google Scholar
• Amante C., Eakins B. ETOPO1 1 Arc-Minute global relief model: procedures, data sources and analysis. 2009. NOAA Technical Memorandum NESDIS NGDC-24. Boulder: National Geophysical Data Center, Marine Geology and Geophysics Division, National Oceanic and Atmospheric Administration..
   Google Scholar
• Barbraud C., Rolland V., Jenouvrier S., Nevoux M., Delord K., Weimerskirch H. Effects of climate change and fisheries bycatch on Southern Ocean seabirds: a review. Marine Ecology Progress Series. 2012; 454: 285–307.
   Web of Science ®Google Scholar
• Bearhop S., Waldron S., Votier S.C., Furness R.W. Factors that influence assimilation rates and fractionation of nitrogen and carbon stable isotopes in avian blood and feathers. Physiological and Biochemical Zoology. 2002; 75: 451–458.
   PubMed Web of Science ®Google Scholar
• Biuw M., Krafft B.A., Hofmeyr G.J.G., Lydersen C., Kovacs K.M. Time budgets and at-sea behaviour of lactating female Antarctic fur seals Arctocephalus gazella at Bouvetøya. Marine Ecology Progress Series. 2009; 385: 271–284.
   Web of Science ®Google Scholar
• Blanchet M.-A., Biuw M., Hofmeyr J., de Bruyn P., Lydersen C., Kovacs K. At-sea behaviour of three krill predators breeding at Bouvetøya—Antarctic fur seals, macaroni penguins and chinstrap penguins. Marine Ecology Progress Series. 2013; 477: 285–302.
   Web of Science ®Google Scholar
• Bligh E.G., Dyer W.J. A rapid method of total lipid extraction and purification. Canadian Journal of Biochemistry and Physiology. 1959; 37: 911–917.
   PubMedGoogle Scholar
• Bond A.L., Lavers J.L. Climate change alters the trophic niche of a declining apex marine predator. Global Change Biology. 2014; 20: 2100–2107.
   Web of Science ®Google Scholar
• Bost C.A., Cotte C., Terray P., Barbraud C., Bon C., Delord K., Gimenez O., Handrich Y., Naito Y., Guinet C., Weimerskirch H. Large-scale climatic anomalies affect marine predator foraging behaviour and demography. Nature Communications. 2015; 6: article no. 8220, doi: http://dx.doi.org/10.1038/ncomms9220.
   Google Scholar
• Boyd I.L. Estimating food consumption of marine predators: Antarctic fur seals and macaroni penguins. Journal of Applied Ecology. 2002; 39: 103–119.
   Web of Science ®Google Scholar
• Brault E.K., Goebel M.E., Geisz H.N., Canuel E.A., Dickhut R.M. Inter-annual variation of persistent organic pollutants (POPs) in an Antarctic top predator Arctocephalus gazella . Environmental Science & Technology. 2013; 47: 12744–12752.
   PubMed Web of Science ®Google Scholar
• Cherel Y., Hobson K.A., Guinet C., Vanpe C. Stable isotopes document seasonal changes in trophic niches and winter foraging individual specialization in diving predators from the Southern Ocean. Journal of Animal Ecology. 2007; 76: 826–836.
   PubMed Web of Science ®Google Scholar
• DeNiro M.J., Epstein S. Influence of diet on the distribution of carbon isotopes in animals. Geochimica et Cosmochimica Acta. 1978; 42: 495–506.
   Web of Science ®Google Scholar
• Ehrich D., Tarroux A., Stien J., Lecomte N., Killengreen S., Berteaux D., Yoccoz N.G. Stable isotope analysis: modelling lipid normalization for muscle and eggs from Arctic mammals and birds. Methods in Ecology and Evolution. 2010; 2: 66–76.
   Web of Science ®Google Scholar
• Flores H., Atkinson A., Kawaguchi S., Krafft B., Milinevsky G., Nicol S., Reiss C., Tarling G., Werner R., Bravo Rebolledo E., Cirelli V., Cuzin-Roudy J., Fielding S., van Franeker J., Groeneveld J., Haraldsson M., Lombana A., Marschoff E., Meyer B., Pakhomov E., Van de Putte A., Rombolá E., Schmidt K., Siegel V., Teschke M., Tonkes H., Toullec J., Trathan P., Tremblay N., Werner T. Impact of climate change on Antarctic krill. Marine Ecology Progress Series. 2012; 458: 1–19.
   Web of Science ®Google Scholar
• Gentry R.L., Kooyman G.L. Fur seals: maternal strategies on land and at sea. 1986; Princeton, NJ: Princeton University Press.
   Google Scholar
• Green K., Burton H.R., Williams R. The diet of Antarctic fur seals Arctocephalus gazella (Peters) during the breeding season at Heard Island. Antarctic Science. 1989; 1: 317–324.
   Web of Science ®Google Scholar
• Gutt J., Bertler N., Bracegirdle T.J., Buschmann A., Comiso J., Hosie G., Isla E., Schloss I.R., Smith C.R., Tournadre J., Xavier J.C. The Southern Ocean ecosystem under multiple climate change stresses—an integrated circumpolar assessment. Global Change Biology. 2015; 21: 1434–1453.
   Web of Science ®Google Scholar
• Hanson N., Wurster C., Bird M., Reid K., Boyd I. Intrinsic and extrinsic forcing in life histories: patterns of growth and stable isotopes in male Antarctic fur seal teeth. Marine Ecology Progress Series. 2009; 388: 263–272.
   Web of Science ®Google Scholar
• Hill S.L., Phillips T., Atkinson A. Potential climate change effects on the habitat of Antarctic krill in the Weddell quadrant of the Southern Ocean. PLoS One. 2013; 8: e72246.
   Web of Science ®Google Scholar
• Hobson K.A., Schell D.M., Renouf D., Noseworthy E. Stable carbon and nitrogen isotopic fractionation between diet and tissues of captive seals: implications for dietary reconstructions involving marine mammals. Canadian Journal of Fisheries and Aquatic Sciences. 1996; 53: 528–533.
   Web of Science ®Google Scholar
• Hofmeyr G.J.G., Bester M., Kirkman S., Lydersen C., Kovacs K. Intraspecific differences in the diet of Antarctic fur seals at Nyrøysa, Bouvetøya. Polar Biology. 2010; 33: 1171–1178.
   Web of Science ®Google Scholar
• Hofmeyr G.J.G., Krafft B.A., Kirkman S.P., Bester M.N., Lydersen C., Kovacs K.M. Population changes of Antarctic fur seals at Nyrøysa, Bouvetøya. Polar Biology. 2005; 28: 725–731.
   Web of Science ®Google Scholar
• Huang T., Sun L., Stark J., Wang Y., Cheng Z., Yang Q., Sun S. Relative changes in krill abundance inferred from Antarctic fur seal. PLoS One. 2011; 6: e27331.
   PubMed Web of Science ®Google Scholar
• Ichii T., Bengtson J., Boveng P., Takao Y., Jansen J., Hiruki-Raring L., Cameron M., Okamura H., Hayashi T., Naganobu M. Provisioning strategies of Antarctic fur seals and chinstrap penguins produce different responses to distribution of common prey and habitat. Marine Ecology Progress Series. 2007; 344: 277–297.
   Web of Science ®Google Scholar
• Jacob U., Brey T., Fetzer I., Kaehler S., Mintenbeck K., Dunton K., Beyer K., Struck U., Pakhomov E.A., Arntz W.E. Towards the trophic structure of the Bouvet Island marine ecosystem. Polar Biology. 2006; 29: 106–113.
   Web of Science ®Google Scholar
• Jardine T.D., Cunjak R.A. Analytical error in stable isotope ecology. Oecologia. 2005; 144: 528–533.
   PubMed Web of Science ®Google Scholar
• Kernaléguen L., Arnould J.P.Y., Guinet C., Cherel Y. Determinants of individual foraging specialization in large marine vertebrates, the Antarctic and Subantarctic fur seals. Journal of Animal Ecology. 2015; 84: 1081–1091.
   Web of Science ®Google Scholar
• Kernaléguen L., Cazelles B., Arnould J.P.Y., Richard P., Guinet C., Cherel Y. Long-term species, sexual and individual variations in foraging strategies of fur seals revealed by stable isotopes in whiskers. PLoS One. 2012; 7: e32916.
   PubMed Web of Science ®Google Scholar
• Kirkman S.P., Wilson W., Klages N.T.W., Bester M.N., Isaksen K. Diet and estimated food consumption of Antarctic fur seals at Bouvetøya during summer. Polar Biology. 2000; 23: 745–752.
   Web of Science ®Google Scholar
• Klages N.T.W., Hofmeyr G.J.G., Gjertz I.L.B. Prey of Antarctic fur seals at Bouvetøya, Southern Ocean. Polar Record. 1999; 35: 255–257.
   Google Scholar
• Kurle C.M. Stable-isotope ratios of blood components from captive northern fur seals (Callorhinus ursinus) and their diet: applications for studying the foraging ecology of wild otariids. Canadian Journal of Zoology. 2002; 80: 902–909.
   Web of Science ®Google Scholar
• Lesage V., Hammill M.O., Kovacs K.M. Diet-tissue fractionation of stable carbon and nitrogen isotopes in phocid seals. Marine Mammal Science. 2002; 18: 182–193.
   Web of Science ®Google Scholar
• Logan J.M., Jardine T.D., Miller T.J., Bunn S.E., Cunjak R.A., Lutcavage M.E. Lipid corrections in carbon and nitrogen stable isotope analyses: comparison of chemical extraction and modelling methods. Journal of Animal Ecology. 2008; 77: 838–846.
   PubMed Web of Science ®Google Scholar
• Lowther A.D., Lydersen C., Biuw M., de Bruyn P.J.N., Hofmeyr G.J.G., Kovacs K.M. Post-breeding at-sea movements of three central-place foragers in relation to submesoscale fronts in the Southern Ocean around Bouvetøya. Antarctic Science. 2014; 26: 533–544.
   Web of Science ®Google Scholar
• McBride M.M., Dalpadado P., Drinkwater K.F., Godø O.R., Hobday A.J., Hollowed A.B., Kristiansen T., Murphy E.J., Ressler P.H., Subbey S., Hofmann E.E., Loeng H. Krill, climate, and contrasting future scenarios for Arctic and Antarctic fisheries. ICES Journal of Marine Science. 2014; 71: 1934–1955.
   Web of Science ®Google Scholar
• Murphy E.J., Trathan P.N., Watkins J.L., Reid K., Meredith M.P., Forcada J., Thorpe S.E., Johnston N.M., Rothery P. Climatically driven fluctuations in Southern Ocean ecosystems. Proceedings of the Royal Society of London B. 2007; 274: 3057–3067.
   Web of Science ®Google Scholar
• Niemandt C., Kovacs K.M., Lydersen C., Dyer B.M., Isaksen K., Hofmeyr G.J.G., Mehlum F., de Bruyn P.J.N. Chinstrap and macaroni penguin diet and demography at Nyrøysa, Bouvetøya. Antarctic Science. 2016; 28: 91–100.
   Web of Science ®Google Scholar
• Parsons M., Mitchell I., Butler A., Ratcliffe N., Frederiksen M., Foster S., Reid J.B. Seabirds as indicators of the marine environment. ICES Journal of Marine Science. 2008; 65: 1520–1526.
   Web of Science ®Google Scholar
• Polito M.J., Goebel M.E. Investigating the use of stable isotope analysis of milk to infer seasonal trends in the diets and foraging habitats of female Antarctic fur seals. Journal of Experimental Marine Biology and Ecology. 2010; 395: 1–9.
   Web of Science ®Google Scholar
• Polito M.J., Reiss C.S., Trivelpiece W.Z., Patterson W.P., Emslie S.D. Stable isotopes identify an ontogenetic niche expansion in Antarctic krill (Euphausia superba) from the South Shetland Islands, Antarctica. Marine Biology. 2013; 160: 1311–1323.
   Web of Science ®Google Scholar
• Post D.M., Layman C.A., Arrington D.A., Takimoto G., Quattrochi J., Montana C.G. Getting to the fat of the matter: models, methods and assumptions for dealing with lipids in stable isotope analyses. Oecologia. 2007; 152: 179–189.
   PubMed Web of Science ®Google Scholar
• R Development Core Team. R: a language and environment for statistical computing. 2016. Version 3.2.5. Accessed on the internet at http://www.r-project.org on 14 April 2016..
   Google Scholar
• Reid K., Davis D., Staniland I.J. Spatial and temporal variability in the fish diet of Antarctic fur seal (Arctocephalus gazella) in the Atlantic sector of the Southern Ocean. Canadian Journal of Zoology. 2006; 84: 1025–1037.
   Web of Science ®Google Scholar
• Reid K., Murphy E.J., Loeb V., Hewitt R.P. Krill population dynamics in the Scotia Sea: variability in growth and mortality within a single population. Journal of Marine Systems. 2002; 36: 1–10.
   Web of Science ®Google Scholar
• Robinson S.A., Goldsworthy S.G., van den Hoff J., Hindell M.A. The foraging ecology of two sympatric fur seal species, Arctocephalus gazella and Arctocephalus tropicalis, at Macquarie Island during the austral summer. Marine and Freshwater Research. 2002; 53: 1071–1082.
   Web of Science ®Google Scholar
• Scambos T.A., Haran T.M., Fahnestock M.A., Painter T.H., Bohlander J. MODIS-based Mosaic of Antarctica (MOA) data sets: continent-wide surface morphology and snow grain size. Remote Sensing of Environment. 2007; 111: 242–257.
   Web of Science ®Google Scholar
• Staniland I., Pond D. Investigating the use of milk fatty acids to detect dietary changes: a comparison with faecal analysis in Antarctic fur seals. Marine Ecology Progress Series. 2005; 294: 283–294.
   Web of Science ®Google Scholar
• Staniland I., Robinson S.L., Silk J.R.D., Warren N., Trathan P.N. Winter distribution and haul-out behaviour of female Antarctic fur seals from South Georgia. Marine Biology. 2012; 159: 291–301.
   Web of Science ®Google Scholar
• Staniland I.J., Robinson S.L. Segregation between the sexes: Antarctic fur seals, Arctocephalus gazella, foraging at South Georgia. Animal Behaviour. 2008; 75: 1581–1590.
   Web of Science ®Google Scholar
• Stowasser G., Atkinson A., McGill R.A.R., Phillips R.A., Collins M.A., Pond D.W. Food web dynamics in the Scotia Sea in summer: a stable isotope study. Deep-Sea Research Part II. 2012; 59–60: 208–221.
   Web of Science ®Google Scholar
• Swanson H.K., Lysy M., Power M., Stasko A.D., Johnson J.D., Reist J.D. A new probabilistic method for quantifying n-dimensional ecological niches and niche overlap. Ecology. 2015; 96: 318–324.
   Web of Science ®Google Scholar
• Tarroux A., Ehrich D., Lecomte N., Jardine T.D., Bêty J., Berteaux D. Sensitivity of stable isotope mixing models to variation in isotopic ratios: evaluating consequences of lipid extraction. Methods in Ecology and Evolution. 2010; 1: 231–241.
   Web of Science ®Google Scholar
• Trathan P.N., Forcada J., Murphy E.J. Environmental forcing and Southern Ocean marine predator populations: effects of climate change and variability. Philosophical Transactions of the Royal Society of London B. 2007; 362: 2351–2365.
   Web of Science ®Google Scholar
• Trathan P.N., Ratcliffe N., Masden E.A. Ecological drivers of change at South Georgia: the krill surplus, or climate variability. Ecography. 2012; 35: 983–993.
   Web of Science ®Google Scholar
• Weimerskirch H., Inchausti P., Guinet C., Barbraud C. Trends in bird and seal populations as indicators of a system shift in the Southern Ocean. Antarctic Science. 2003; 15: 249–256.
   Web of Science ®Google Scholar
• Wilson R.M., Chanton J.P., Balmer B.C., Nowacek D.P. An evaluation of lipid extraction techniques for interpretation of carbon and nitrogen isotope values in bottlenose dolphin (Tursiops truncatus) skin tissue. Marine Mammal Science. 2014; 30: 85–103.
   Web of Science ®Google Scholar
• Yurkowski D.J., Hussey N.E., Semeniuk C., Ferguson S.H., Fisk A.T. Effects of lipid extraction and the utility of lipid normalization models on δ13C and δ15N values in Arctic marine mammal tissues. Polar Biology. 2015; 38: 131–143.
   Web of Science ®Google Scholar
• Zhao L.Y., Schell D.M., Castellini M.A. Dietary macronutrients influence 13C and 15N signatures of pinnipeds: captive feeding studies with harbor seals (Phoca vitulina). Comparative Biochemistry and Physiology A Molecular and Integrative Physiology. 2006; 143: 469–478.
   Web of Science ®Google Scholar