[MARMAM] New publication on Effect of tissue decomposition on stable isotope signatures
annittapayo at hotmail.com
Wed Apr 3 08:06:23 PDT 2013
We are pleased to announce that the following paper on Effect of tissue decomposition on stable isotope signatures of striped dolphins Stenella coeruleoalba and loggerhead sea turtles Caretta caretta is now available here.
Payo-Payo A, Ruiz B, Cardona L, Borrell A
(2013) Effect of tissue decomposition on stable isotope signatures of striped dolphins Stenella coeruleoalba and loggerhead sea turtles Caretta caretta. Aquat Biol 18:141-147
ABSTRACT: Marine mammals and turtles are often
studied using the carcasses of stranded dead individuals. Since
decomposition processes might modify the stable isotope ratios of
tissues, the present study tested the effects of decomposition on carbon
(Δsup>13C) and nitrogen (Δ15N) stable isotope ratios in 2 tissue types of striped dolphin Stenella coeruleoalba and loggerhead sea turtle Caretta caretta.
Decomposing carcasses of 3 dolphins and 3 turtles were sampled for
muscle and skin for 62 d. Following lipid extraction, samples were
analysed regularly using a continuous flow-isotope ratio mass
spectrometer. Samples reached decomposition stage CC4 after 62 d at
ambient temperature, but no statistical change in Δ13C or Δ15N
was observed over that period for either tissue or species. These
results imply that muscle and skin samples from carcasses decomposing
out of water at stage CC4 or lower can be used as reliable material for
stable isotope analysis in these 2 species, and probably in other marine
mammal and marine turtle species. The effects of decomposition on the
stability of stable isotope ratios in other tissues, in carcasses at
stage CC5, or in carcasses decomposing underwater require further study.
Ana Payo Payo PhD Student
anapayopayo at gmail.com
Carrer Miquel Marquès, 21,
07190 Esporles, Islas Baleares
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