Although there are no obvious changes in most conch parameters at septum 13, the change in δ 13 C appears to coincide with the onset of a decreasing trend of WER ( Fig 6E and 6F ).
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Isotopic evidence concerning the habitat of Nautilus macromphalus in New Caledonia.
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The sentences
While the female exhibits a stable WWI after a conch diameter of 80 mm, the male shows an increasing trend.