Consulta: creatorFacets:"Le Corre, M"
Registros recuperados: 6
Data/hora: 02/06/2024 09:03:19

Trace elements in three marine birds breeding on Reunion Island (Western Indian Ocean): Part 2 - Factors influencing their detoxification
Provedor de dados: 5
Autores: Kojadinovic, Jessica; Bustamante, Paco; Le Corre, M; Cosson, R. P.
Seabird tissues collected between 2002 and 2004 from Barau's Petrel (Pterodroma baraui), Audubon's Shearwater (Puffinus lherminieri bailloni), and White-Tailed Trop icbird (Phaethon lepturus) colonies on Reunion Island were analyzed for metallothioneins (MTs) and trace element content. The subcellular distribution between soluble and insoluble fractions of Cd, Cu, Fe, Mn, Se, and Zn was determined in liver and kidney. In both, the soluble fraction of the cell concentrated most of the Cd and Se, whereas Fe, Mn, and Zn were preferentially accumulated in the insoluble fraction. The distribution of these elements varied with the tissue, age of the bird, and species. Furthermore, the distributions of Fe and Mn were somewhat influenced by the bird's physical...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2489.pdf

Mercury content in commercial pelagic fish and its risk assessment in the Western Indian Ocean
Provedor de dados: 5
Autores: Kojadinovic, Jessica; Potier, M; Le Corre, M; Cosson, R; Bustamante, Paco.
As top predators of pelagic food webs, large fish naturally bioaccumulate mercury (Hg). Determining Hg burdens in commercialized fish is essential considering the concern about effects of contaminants on human health and the legal thresholds that are therefore set for local consumption and/or exportation. Total Hg levels were measured in the muscular tissue of 183 fish of five commercially important species from the tropical zone of the Western Indian Ocean. All individuals were measured and sexed in order to study the impregnation of Hg with size and sex within each species. Values of Hg found in this part of the Indian Ocean were comparable to Hg in muscular tissue of the same species studied in other areas. The highest Hg levels were noted in Swordfish...
Tipo: Text
Palavras-chave: Health standards; Mozambique channel; Reunion Island; Pelagic fish; Impregnation levels; Mercury.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1862.pdf

Resource partitioning within a tropical seabird community: new information from stable isotopes
Provedor de dados: 5
Autores: Cherel, Y; Le Corre, M; Jaquemet, S; Menard, Frederic; Richard, Pierre; Weimerskirch, H.
Characteristics of the tropical oceanic environment (low productivity, little seasonality) and poor diversity of tropical seabird foraging methods and prey relative to temperate and polar species suggest that tropical seabirds overall encompass a narrow range of isotopic niches, with large overlaps among species. To test this hypothesis, we examined the stable carbon (delta C-13) and nitrogen (delta N-15) isotopic composition of blood and feathers of 5 seabird species from Europa Island, Mozambique Channel. While differences were small, blood delta C-13 and delta N-15 values characterized 5 distinct and non-overlapping trophic niches during the breeding period. Seabirds used 2 distinct foraging areas (delta C-13), one used by sooty tern Sterna fuscata and...
Tipo: Text
Palavras-chave: Trophic segregation; Tuna; Sooty tern; Pelagic ecosystem; Frigatebird; Booby.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4675.pdf

Trace elements in three marine birds breeding on Reunion Island (Western Indian Ocean): Part 1 - Factors influencing their bioaccumulation
Provedor de dados: 5
Autores: Kojadinovic, Jessica; Le Corre, M; Cosson, R.p.; Bustamante, Paco.
This work aimed to use seabirds as bioindicators of trace element levels in the tropical waters and food webs of the Western Indian Ocean. The accumulation patterns of selected toxic (Cd and Hg) and essential (Cu, Fe, Mn, Se, and Zn) elements were determined in liver, kidney, and pectoral muscle of 162 marine birds belonging to 3 species collected in Reunion Island between 2002 and 2004. These pelagic seabirds belong to the following species: Barau's Petrel (Pterodroma baraui), Audubon's Shearwater (Puffinus lherminieri bailloni), and White-Tailed Tropicbird (Phaethon lepturus). Hg levels were also measured in breast feathers. Highest mean kidney Cd and liver Hg levels (respectively, 27.79 +/- 13.78 mu g.g(-1) dry weight (dw) and 24.31 +/- 14.13 mu g.g(-1)...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2488.pdf

Extreme philopatry and genetic diversification at unprecedented scales in a seabird
Provedor de dados: 5
Autores: Danckwerts, D. K.; Humeau, L.; Pinet, P.; Mcquaid, C. D.; Le Corre, M.
Effective conservation requires maintenance of the processes underlying species divergence, as well as understanding species’ responses to episodic disturbances and long-term change. We explored genetic population structure at a previously unrecognized spatial scale in seabirds, focusing on fine-scale isolation between colonies, and identified two distinct genetic clusters of Barau’s Petrels (Pterodroma baraui) on Réunion Island (Indian Ocean) corresponding to the sampled breeding colonies separated by 5 km. This unexpected result was supported by long-term banding and was clearly linked to the species’ extreme philopatric tendencies, emphasizing the importance of philopatry as an intrinsic barrier to gene flow. This implies that loss of a single colony...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00687/79938/82836.pdf

Comparative foraging ecology and ecological niche of a superabundant tropical seabird: the sooty tern Sterna fuscata in the southwest Indian Ocean
Provedor de dados: 5
Autores: Jaquemet, S; Potier, M; Cherel, Y; Kojadinovic, J; Bustamante, Paco; Richard, P; Catry, T; Ramos, J; Le Corre, M.
Over 6-million pairs of sooty terns Sterna fuscata breed once a year in the southwest Indian Ocean, mostly on three islands of the Mozambique Channel (Europa, Juan de Nova and Glorieuses) and in the Seychelles region. Seasonal reproduction in either winter or summer is the dominant strategy in the area, but non-seasonal reproduction also occurred in some places like at Glorieuses Archipelago. The feeding ecology of the sooty tern was investigated during the breeding seasons to determine whether terns showed significant differences in their trophic ecology between locations. Regurgitations were analyzed to describe the diet of individuals when breeding, and stable isotopes and mercury concentrations were used to temporally integrate over the medium-term of...
Tipo: Text
Palavras-chave: Mercury &amp;#948; 15N &amp;#948; 13C fish larvae flying squid feeding ecology Seabirds.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4654.pdf