[MARMAM] New publication: role of pollutants in long-finned pilot whale mass strandings (Ana García)

Ana M Garcia Cegarra albatracu at gmail.com
Fri Jan 29 11:27:01 PST 2021

Hi everyone!

On behalf of my co-authors I am pleased to announce the publication of our
new paper:

Ana M. Garcia-Cegarra, Jean-Luc Jung, Rodrigo Orrego, Janeide de A.
Padilha, Olaf Malme, Bernardo Ferreira-Braz, Ricardo E. Santelli, Karla
Pozo, Petra Pribylova, Mario Alvarado-Rybak, Claudio Azati, Karen A. Kidd
j, Winfred Espejo, Gustavo Chiang, Paulina Bahamonde.  *Persistence,
bioaccumulation and vertical transfer of pollutants in long-finned pilot
whales stranded in Chilean Patagonia*. Science of the Total Environment,
770. DOI: https://doi.org/10.1016/j.scitotenv.2021.145259.

Long-finned pilot whales (LFPW) are cetaceans with strong social groups
often involved in mass strandings worldwide. However, these beachings occur
for reasons that are not fully understood. In 2016, 124 LFPW were stranded
on the Chilean Patagonian islands, offering a unique opportunity to obtain
crucial information on the ecology, biology, and genetics of this
population. In addition, we examined whether persistent organic pollutants
(POPs) and trace elements (TEs) were responsible for this mass mortality.
Stable isotopes (δ13C & δ15N) and genetic analyses were used to reconstruct
the trophic ecology, social structure, and kinship of LFPW and compared to
POPs and TEs levels found in LFPW. Mitochondrial DNA analyses on 71
individuals identified four maternal lineages within the stranded LFPW. Of
these animals, 32 individuals were analyzed for a suite of POPs, TEs, and
lipid content in blubber. The highest levels were found for ΣDDXs (6
isomers) (542.46 ± 433.46 ng/g, lw) and for total Hg (2.79 ± 1.91 mg/kg,
dw). However, concentrations found in these LFPW were lower than toxicity
thresholds and those reported for LFPW stranded in other regions. Evidence
was found of ΣDDX, Σ7PCBs, and Cd bioaccumulation and maternal transfer of
POPs in mother/offspring groups. Nevertheless, no clear relationship
between contaminant concentrations and LFPW mortality was established.
Further research is still needed to assess LFPW populations including
conservation status and exposure to chemicals in remote areas such as

Please feel free to contact me if you need a pdf copy: *albatracu at gmail.com
<albatracu at gmail.com>*

All the best

Ph.D. Ana M. Garcia
Centro de Investigación de Fauna Marina y Avistamiento de Cetáceos,
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