Dear all,

On behalf of all co-authors, I am pleased to inform you on the publication of a 
paper concerning the contamination status by persistent organic pollutants of 
the Atlantic spotted dolphin (Stenella frontalis).

Méndez-Fernandez P, Taniguchi S, Santos MCO, Cascão I, Quérouil S, Martín V, 
Tejedor M, Carrillo M, Rinaldi C, Rinaldi R and Montone RC (2018) Contamination 
status by persistent organic pollutants of the Atlantic spotted dolphin 
(Stenella frontalis) at the metapopulation level. Environmental pollution: 236: 

The Atlantic spotted dolphin (Stenella frontalis) is an endemic species of the 
tropical-temperate Atlantic Ocean with widespread distribution. Although this 
species has been the subject of a large number of studies throughout its range, 
it remains in the “data deficient” category of the International Union for 
Conservation of Nature (IUCN). Chemical pollution by persistent organic 
pollutants (POPs) has been listed as one of the major threats to this species, 
however, there is no information on a wide scale. Thus, the aim of the present 
study was to investigate the contamination status of spotted dolphins on the 
metapopulation level as well as determine spatial and temporal variations in 
POP concentrations and bioaccumulation.
A total of 115 blubber samples collected from a large part of the Atlantic 
basin were analysed for PCBs, DDTs, PBDEs, chlordanes, HCB and mirex. Although 
PCBs and DDTs were the predominant compounds in all areas, inter-location 
differences in POP concentrations were observed. Dolphins found at São Paulo, 
southeastern coast of Brazil, had the highest PCB concentrations (median: 10.5 
mg/g lw) and Canary Islands dolphins had the highest DDT concentrations 
(median: 5.13 mg/g lw). Differences in PCB patterns among locations were also 
observed. Dolphins from the Azores and São Paulo demonstrated a similar 
pattern, with relatively highly contributions of tetra- (6.8 and 5.2%, 
respectively) and penta-CBs (25.6 and 23.8%, respectively) and lower 
contributions of hepta-CBs (20.8 and 23.5%, respectively) in comparison to 
other areas. Moreover, the sex of the animals and the year in which sampling or 
capture occurred exerted an important influence on the majority of the POPs 
analysed. Comparisons with toxicity thresholds available in the literature 
reveal that the São Paulo and Canary Island dolphins are the most vulnerable 
populations and should be considered in future conservation and management 
programs for the Atlantic spotted dolphin.

The paper is 50 days' free access in the follow link:

If you have any problem with the above link, please feel free to contact me 
directly for a PDF copy at<>

Best wishes,


Paula Méndez Fernandez (PhD)

Ingénieur de Recherche

Observatoire Pelagis UMS 3462 CNRS/Université de La Rochelle


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