Influence of sex, size and trophic level on blood Hg concentrations in Black caiman, Melanosuchus niger (Spix, 1825) in French Guiana

被引:13
作者
Lemaire, Jeremy [1 ,2 ]
Bustamante, Paco [2 ,3 ]
Marquis, Olivier [4 ]
Caut, Stephane [5 ,6 ]
Brischoux, Francois [1 ]
机构
[1] UMR 7372 CNRS La Rochelle Univ, Ctr Etud Biol Chiz CEBC, F-79360 Villiers En Bois, France
[2] UMR 7266 CNRS La Rochelle Univ, Littoral Environm & Soc LIENSs, 2 Rue Olympe de Gouges, F-17000 La Rochelle, France
[3] Inst Univ France IUF, 1 Rue Descartes, F-75005 Paris, France
[4] Museum Natl Hist Nat, Parc Zool Paris, 53 Ave St Maurice, F-75012 Paris, France
[5] CSIC, Dept Etol & Conservac Biodivers, Estn Biol Donana, C Amer Vespucio S-N Isla de La Cartuja, E-41092 Seville, Spain
[6] ANIMAVEG Conservat, 58 Ave President Salvador Allende, F-94800 Villejuif, France
关键词
Crocodilians; Trace metals; Tropical ecosystems; Diet; Bioaccumulation;
D O I
10.1016/j.chemosphere.2020.127819
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Mercury (Hg) is a contaminant that is impacting ecosystems worldwide. Its toxicity is threatening wildlife and human populations, leading to the necessity of identifying the most affected ecosystems. Therefore, it is essential to identify pertinent bioindicator organisms to monitor Hg contamination. In this study, we determined the stable carbon (delta C-13) and nitrogen (delta N-15) isotope ratios in the red blood cells (RBCs), and the total Hg concentration in total blood of 72 Melanosuchus niger in French Guiana. The goals of our study were to assess the level of Hg contamination in total blood of Black caimans and to further investigate the influence of individual traits (i.e., sex, size/age, diet) on Hg concentrations. Mercury concentration in total blood of Black caimans ranged from 0.572 to 3.408 mu g g(-1) dw (mean +/- SD is 1.284 +/- 0.672 mu g g(-1) dw) and was positively correlated to individual body size and trophic position (delta N-15). We did not find any sexual or seasonal effects on Hg concentrations in the blood. The use of blood of M. niger is relevant to determine Hg concentrations within the population and suggests that this species can be used as a bioindicator for environmental contamination. In addition, our results emphasize trophic position as a major source of Hg variation and further suggest that it is essential to take trophic position (delta N-15) into account for future studies. (C) 2020 Elsevier Ltd. All rights reserved.
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页数:7
相关论文
共 58 条
[1]   Biomagnification and bioaccumulation of mercury in an arctic marine food web: insights from stable nitrogen isotope analysis [J].
Atwell, L ;
Hobson, KA ;
Welch, HE .
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 1998, 55 (05) :1114-1121
[2]  
Bearhop S, 2000, ENVIRON TOXICOL CHEM, V19, P1638, DOI [10.1897/1551-5028(2000)019<1638:DOMIBA>2.3.CO
[3]  
2, 10.1002/etc.5620190622]
[4]   Environmental causes and reproductive correlates of mercury contamination in European pond turtles (Emys orbicularis) [J].
Beau, Frederic ;
Bustamante, Paco ;
Michaud, Bruno ;
Brischoux, Francois .
ENVIRONMENTAL RESEARCH, 2019, 172 :338-344
[5]  
Benoit JM, 2003, ACS SYM SER, V835, P262
[6]   Diet of the non-native spectacled caiman (Caiman crocodilus) in Puerto Rico [J].
Bontemps, Damien R. ;
Cuevas, Elvira ;
Ortiz, Eileen ;
Wunderle, Joseph M., Jr. ;
Joglar, Rafael L. .
MANAGEMENT OF BIOLOGICAL INVASIONS, 2016, 7 (03) :287-296
[7]   Metals and metalloids in tissues of American alligators in three Florida lakes [J].
Burger, J ;
Gochfeld, M ;
Rooney, AA ;
Orlando, EF ;
Woodward, AR ;
Guillette, LJ .
ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY, 2000, 38 (04) :501-508
[8]   Metal levels in blood, muscle and liver of water snakes (Nerodia spp.) from New Jersey, Tennessee and South Carolina [J].
Burger, Joanna ;
Campbell, Kym Rouse ;
Murray, Stephanie ;
Campbell, Todd S. ;
Gaines, Karen F. ;
Jeitner, Christian ;
Shukla, Tara ;
Burke, Sean ;
Gochfeld, Michael .
SCIENCE OF THE TOTAL ENVIRONMENT, 2007, 373 (2-3) :556-563
[9]   Elevated lead levels in farmed American alligators Alligator mississippiensis consuming nutria Myocastor coypus meat contaminated by lead bullets [J].
Camus, AC ;
Mitchell, MM ;
Williams, JF ;
Jowett, PLH .
JOURNAL OF THE WORLD AQUACULTURE SOCIETY, 1998, 29 (03) :370-376
[10]   The dark side of the black caiman: Shedding light on species dietary ecology and movement in Agami Pond, French Guiana [J].
Caut, Stephane ;
Francois, Vincent ;
Bacques, Matthieu ;
Guiral, Daniel ;
Lemaire, Jeremy ;
Lepoint, Gilles ;
Marquis, Olivier ;
Sturaro, Nicolas .
PLOS ONE, 2019, 14 (06)