J. K. Baum, R. A. Myers, D. G. Kehler, B. Worm, S. J. Harley et al., Collapse and Conservation of Shark Populations in the Northwest Atlantic, Science, vol.299, issue.5605, pp.389-392, 2003.
DOI : 10.1126/science.1079777

J. D. Blum, B. N. Popp, J. C. Drazen, A. Choy, C. Johnson et al., Methylmercury production below the mixed layer in the North Pacific Ocean, Nature Geoscience, vol.7, issue.10, pp.879-884
DOI : 10.1038/ngeo1918

R. Bonfil, The Biology and Ecology of the Silky Shark,Carcharhinus Falciformis, pp.114-127, 2008.
DOI : 10.1002/9781444302516.ch10

R. Bonfil, S. Clarke, and H. Nakano, The Biology and Ecology of the Oceanic Whitetip Shark,Carcharhinus Longimanus, In: Sharks of the Open Ocean, pp.128-139, 2008.
DOI : 10.1002/9781444302516.ch11

A. Borrell, A. Aguilar, M. Gazo, R. P. Kumarran, and L. Cardona, Stable isotope profiles in whale shark (Rhincodon typus) suggest segregation and dissimilarities in the diet depending on sex and size, Environmental Biology of Fishes, vol.22, issue.4, pp.559-557, 2011.
DOI : 10.1007/s10641-011-9879-y

V. Branco, J. Canario, C. Vale, J. Raimundo, and C. Reis, Total and organic mercury concentrations in muscle tissue of the blue shark (Prionace glauca L.1758) from the Northeast Atlantic, Marine Pollution Bulletin, vol.49, issue.9-10, pp.854-874, 2004.
DOI : 10.1016/j.marpolbul.2004.09.002

A. A. Cabrera-chávez-costa, F. Galván-magaña, and O. E. Escobar-sánchez, Food habits of the silky shark Carcharhinus falciformis (M??ller & Henle, 1839) off the western coast of Baja California Sur, Mexico, Journal of Applied Ichthyology, vol.23, issue.4, pp.499-503, 2010.
DOI : 10.1111/j.1439-0426.2010.01482.x

Y. Cai, J. R. Rooker, G. A. Gill, and J. P. Turner, Bioaccumulation of mercury in pelagic fishes from the northern Gulf of Mexico, Canadian Journal of Fisheries and Aquatic Sciences, vol.64, issue.3, pp.458-469, 2007.
DOI : 10.1139/f07-017

L. J. Compagno, Sharks of the world. An annotated and illustrated catalogue of shark specimen known to date. Part 2, FAO species catalogue. Carcharhiniformes. FAO Fish. Synop, vol.44, issue.1252, pp.251-655, 1984.

L. J. Compagno, Pelagic Elasmobranch Diversity, pp.14-23, 2008.
DOI : 10.1002/9781444302516.ch2

E. Cortés, Standardized diet compositions and trophic levels of sharks, ICES Journal of Marine Science, vol.56, issue.5, pp.107-117, 1999.
DOI : 10.1006/jmsc.1999.0489

D. Niro, M. J. Epstein, and S. , Mechanism of carbon fractionation associated with lipid synthesis, Science, vol.197, pp.261-263, 1977.

S. Dray and A. B. Dufour, The ade4 package: implementing the duality diagram for ecologists, Journal of Statistical Software, vol.22, pp.1-20, 2007.
URL : https://hal.archives-ouvertes.fr/hal-00434575

N. K. Dulvy, J. K. Baum, S. Clarke, L. J. Compagno, E. Cortés et al., You can swim but you can't hide: the global status and conservation of oceanic pelagic sharks and rays, Aquatic Conservation: Marine and Freshwater Ecosystems, pp.459-482, 2008.
DOI : 10.1002/aqc.975

J. A. Estrada, A. N. Rice, M. E. Lutcavage, and G. B. Skomal, Predicting trophic position in sharks of the north-west Atlantic Ocean using stable isotope analysis, Journal of the Marine Biological Association of the UK, vol.83, issue.6, pp.1347-1350, 2003.
DOI : 10.1017/S0025315403008798

J. A. Estrada, A. N. Rice, N. J. Natanson, and G. B. Skomal, USE OF ISOTOPIC ANALYSIS OF VERTEBRAE IN RECONSTRUCTING ONTOGENETIC FEEDING ECOLOGY IN WHITE SHARKS, Ecology, vol.87, issue.4, pp.829-834, 2006.
DOI : 10.1046/j.1444-2906.2000.00166.x

F. Ferretti, B. Worm, G. L. Britten, M. R. Heithaus, and H. K. Lotze, Patterns and ecosystem consequences of shark declines in the ocean, Ecology Letters, vol.47, issue.Suppl., pp.1055-1071, 2010.
DOI : 10.1111/j.1461-0248.2010.01489.x

W. F. Fitzgerald, C. H. Lamborg, and C. R. Hammerschmidt, Marine Biogeochemical Cycling of Mercury, Chemical Reviews, vol.107, issue.2, pp.641-662, 2007.
DOI : 10.1021/cr050353m

J. Gelsteichter and C. J. Walker, Pollutant exposure and effects on sharks and their relatives, 2010.

J. S. Gray, Biomagnification in marine systems: the perspective of an ecologist, Marine Pollution Bulletin, vol.45, issue.1-12, pp.46-52, 2002.
DOI : 10.1016/S0025-326X(01)00323-X

M. R. Heithaus, A. Frid, J. J. Vaudo, B. Worm, and A. J. Wirsing, Unraveling the Ecological Importance of Elasmobranchs, Sharks and Their Relatives II: Biodiversity, Adaptative Physiology and Conservation, pp.611-636, 2010.
DOI : 10.1201/9781420080483-c16

M. R. Heithaus, A. Frid, A. J. Wirsing, and B. Worm, Predicting ecological consequences of marine top predator declines, Trends in Ecology & Evolution, vol.23, issue.4, pp.202-210, 2008.
DOI : 10.1016/j.tree.2008.01.003

K. A. Hobson, Tracing origins and migration of wildlife using stable isotopes: a review, Oecologia, vol.120, issue.3, pp.314-326, 1999.
DOI : 10.1007/s004420050865

K. A. Hobson and H. E. Welch, Determination of trophic relationships within a high Arctic marine food web using ??13C and ??15N analysis, Marine Ecology Progress Series, vol.84, pp.9-18, 1992.
DOI : 10.3354/meps084009

H. Huang and K. Liu, Bycatch and discards by Taiwanese large-scale tuna longline fleets in the Indian Ocean, Fisheries Research, vol.106, issue.3, pp.261-270, 2010.
DOI : 10.1016/j.fishres.2010.08.005

N. E. Hussey, J. Brush, I. D. Mccarthy, and A. T. Fisk, ??15N and ??13C diet???tissue discrimination factors for large sharks under semi-controlled conditions, Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, vol.155, issue.4, pp.445-453
DOI : 10.1016/j.cbpa.2009.09.023

N. E. Hussey, S. F. Dudley, I. D. Mccarthy, G. Cliff, and A. T. Fisk, Stable isotope profiles of large marine predators: viable indicators of trophic position, diet, and movement in sharks?, Canadian Journal of Fisheries and Aquatic Sciences, vol.68, issue.12, pp.2029-2045, 2011.
DOI : 10.1139/f2011-115

N. E. Hussey, M. A. Macneil, J. A. Olin, B. C. Mcmeans, M. J. Kinney et al., Stable isotopes and elasmobranchs: tissue types, methods, applications and assumptions, Journal of Fish Biology, vol.155, issue.5, pp.1449-1484
DOI : 10.1111/j.1095-8649.2012.03251.x

N. E. Hussey, J. A. Olin, M. J. Kinney, B. C. Mcmeans, and A. T. Fisk, Lipid extraction effects on stable isotope values (? 13 C and ? 15 N) of elasmobranch muscle tissue, Journal of Experimental Marine Biology and Ecology, pp.434-435

N. E. Hussey, M. A. Macneil, B. C. Mcmeans, J. A. Olin, S. F. Dudley et al., Rescaling the trophic structure of marine food webs, Ecology Letters, vol.163, issue.2, pp.239-250, 2014.
DOI : 10.1111/ele.12226

N. E. Hussey, M. A. Macneil, B. C. Mcmeans, J. A. Olin, S. F. Dudley et al., . (), Ecology Letters, vol.17, issue.6, p.768, 2014.
DOI : 10.1111/ele.12270

A. P. Kimley, Highly directional swimming by scalloped hammerhead sharks, Sphyrna lewini, and subsurface irradiance, temperature, bathymetry, and geomagnetic field, Marine Biology, vol.21, issue.1, pp.1-22, 1993.
DOI : 10.1007/BF00346421

M. J. Kinney, N. E. Hussey, A. T. Fisk, A. J. Tobin, and C. A. Simpfendorfer, Communal or competitive? Stable isotope analysis provides evidence of resource partitioning within a communal shark nursery, Marine Ecology Progress Series, vol.439, pp.263-276, 2011.
DOI : 10.3354/meps09327

J. Kiszka, B. Simon-bouhet, L. Martinez, P. Richard, C. Pusineri et al., Ecological niche segregation within a community of sympatric dolphins around a tropical island, Marine Ecology Progress Series, vol.433, pp.273-288, 2011.
DOI : 10.3354/meps09165

URL : https://hal.archives-ouvertes.fr/hal-00609730

F. Ménard, A. Lorrain, M. Potier, and F. Marsac, Isotopic evidence of distinct feeding ecologies and movement patterns in two migratory predators (yellowfin tuna and swordfish) of the western Indian Ocean, Marine Biology, vol.79, issue.2, pp.141-152, 2007.
DOI : 10.1007/s00227-007-0789-7

L. R. Monteiro, V. Costa, R. W. Furness, and R. S. Santos, Mercury concentrations in prey fish indicate enhanced bioaccumulation in mesopelagic environments, Marine Ecology Progress Series, vol.141, pp.21-25, 1996.
DOI : 10.3354/meps141021

R. A. Myers and B. Worm, Rapid worldwide depletion of predatory fish communities, Nature, vol.8, issue.6937, pp.280-283, 2003.
DOI : 10.1126/science.281.5377.690

H. Nakano and J. D. Stevens, The Biology and Ecology of the Blue Shark,Prionace Glauca, In: Sharks of the Open Ocean, pp.140-151, 2008.
DOI : 10.1002/9781444302516.ch12

E. K. Pitkitch, M. D. Camhi, and E. A. Babcock, Introduction to sharks of the open ocean, In: Sharks of the Open Ocean, pp.3-13, 2008.

M. Power, G. M. Klein, K. R. Guiguer, and M. K. Kwan, Mercury accumulation in the fish community of a sub-Arctic lake in relation to trophic position and carbon sources, Journal of Applied Ecology, vol.39, issue.5, pp.819-830, 2002.
DOI : 10.1046/j.1365-2664.2002.00758.x

N. Rabehagasoa, A. Lorrain, P. Bach, M. Potier, S. Jaquemet et al., Isotopic niches of the blue shark Prionace glauca and the silky shark Carcharhinus falciformis in the southwestern Indian Ocean, Endangered Species Research, vol.17, issue.1, pp.83-92, 2012.
DOI : 10.3354/esr00418

URL : https://hal.archives-ouvertes.fr/hal-00842635

J. B. Rivers, J. E. Pearson, and C. D. Shultz, Total and organic mercury in marine fish, Bulletin of Environmental Contamination and Toxicology, vol.21, issue.supp., pp.257-266, 1972.
DOI : 10.1007/BF01684554

E. V. Romanov, Bycatch in the tuna purse-seine fisheries of the western Indian Ocean, Fishery Bulletin, vol.100, pp.90-105, 2002.

M. J. Smale, Pelagic Shark Fisheries in the Indian Ocean, pp.247-259, 2008.
DOI : 10.1002/9781444302516.ch21

S. E. Smith, R. C. Rasmussen, D. A. Ramon, and G. M. Caillet, The Biology and Ecology of Thresher Sharks (Alopiidae), pp.60-68, 2008.
DOI : 10.1002/9781444302516.ch4

C. W. Speed, M. G. Meekan, I. C. Field, C. R. Mcmahon, K. Abrantes et al., Trophic ecology of reef sharks determined using stable isotopes and telemetry, Coral Reefs, vol.151, issue.2, pp.357-367, 2011.
DOI : 10.1007/s00338-011-0850-3

J. D. Stevens, The Biology and Ecology of the Shortfin Mako Shark,Isurus Oxyrinchus, pp.87-94, 2008.
DOI : 10.1002/9781444302516.ch7

J. D. Stevens, Epipelagic Oceanic Elasmobranchs, pp.3-36, 2010.
DOI : 10.1201/9781420080483-c1

C. E. Stillwell and N. E. Kohler, ) in the Northwest Atlantic, Canadian Journal of Fisheries and Aquatic Sciences, vol.39, issue.3, pp.407-414, 1982.
DOI : 10.1139/f82-058

D. R. Thompson, R. W. Furness, and L. R. Monteiro, Seabirds as biomonitors of mercury inputs to epipelagic and mesopelagic marine food chains, Science of The Total Environment, vol.213, issue.1-3, pp.299-305, 1998.
DOI : 10.1016/S0048-9697(98)00103-X

J. J. Vaudo and M. R. Heithaus, Dietary niche overlap in a nearshore elasmobranch mesopredator community, Marine Ecology Progress Series, vol.425, pp.247-260, 2011.
DOI : 10.3354/meps08988

B. H. Walker, Biodiversity and Ecological Redundancy, Conservation Biology, vol.44, issue.1, pp.18-23, 1992.
DOI : 10.1016/0006-3207(91)90030-D

P. Ward and R. A. Myers, SHIFTS IN OPEN-OCEAN FISH COMMUNITIES COINCIDING WITH THE COMMENCEMENT OF COMMERCIAL FISHING, Ecology, vol.86, issue.4, pp.835-847, 2005.
DOI : 10.2307/1937508

J. H. Zar, Biostatistical analysis: International edition, 2009.

B. Zeitzschel, Primary productivity in the Gulf of California, Marine Biology, vol.6, issue.3, pp.201-207, 1969.
DOI : 10.1007/BF00360952