Are stable isotope ratios and oscillations consistent in all baleen plates along the filtering apparatus? Validation of an increasingly used methodology

Rapid Communications in Mass Spectrometry : RCM
Raquel García-VernetA Aguilar

Abstract

Baleen plates are anatomical structures composed of inert tissue that hang from the upper jaw in mysticetes. Baleen plates may differ in size and in coloration between different segments of the filtering row or between sides of the mouth. Concern has been raised that variation in baleen plate characteristics may reflect dissimilar structural composition and growth rates liable to affect stable isotope ratios and their oscillation patterns. We measured stable carbon (δ13 C values) and nitrogen (δ15 N values) isotope ratios at intervals of 1 cm along the longitudinal axis of six baleen plates collected from different positions along the mouth of a fin whale. All samples were analysed using a continuous flow isotope ratio mass spectrometer. Generalized additive models were fitted to the data from each baleen plate and the results of the models were compared visually. A total of 206 samples were analysed. Visually, all baleen plates presented nearly identical oscillations, independent of the position or the coloration of the baleen plate. However, the variation in δ13 C and δ15 N values occurring between the different baleen plates was higher in the segments of oscillations exhibiting steeper slopes. Differences in size between pla...Continue Reading

References

May 6, 1999·American Journal of Physical Anthropology·T C O'Connell, R E Hedges
Jun 18, 2003·Rapid Communications in Mass Spectrometry : RCM·Michael SchwertlHans Schnyder
Oct 4, 2008·Science·Jay R RookerJohn D Neilson
Jun 14, 2012·Rapid Communications in Mass Spectrometry : RCM·A BorrellA Aguilar
Mar 22, 2014·PloS One·Alex AguilarAsunción Borrell
Aug 23, 2016·Ecology and Evolution·Cory J D MatthewsSteven H Ferguson
Jul 13, 2017·Rapid Communications in Mass Spectrometry : RCM·Marina ArreguiAsunción Borrell

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Citations

Oct 13, 2018·The Science of the Total Environment·Morgana VighiA Aguilar

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