Diet is correlated with otolith shape in marine fish. Mille, T., Mahe, K., Cachera, M., Villanueva, M. C., de Pontual, H., & Ernande, B. Marine Ecology Progress Series, 555:167--184, August, 2016. 00000 WOS:000383801600012
doi  abstract   bibtex   
Previous studies have shown that the amount of food influences fish otolith structure, opacity and shape and that diet composition has an effect on otolith chemical composition. This study investigated the potential correlation between diet and otolith shape in 5 wild marine fish species by addressing 4 complementary questions. First, is there a global relationship between diet and otolith shape? Second, which prey categories are involved in this relationship? Third, what are the respective contributions of food quantity and relative composition to diet-otolith shape co-variation? Fourth, is diet energetic composition related to otolith shape? For each species, we investigated how otolith shape varies with diet. These questions were tackled by describing diet in the analysis in 4 different ways, while also including individual-state variables to remove potential confounding effects. First, besides the strong effect of individual-state, a global relationship between diet and otolith shape was detected for 4 out of 5 fish species. Second, both main and secondary prey categories were related to variability in otolith shape, and otolith outline reconstructions revealed that both otolith global shape and its finer details co-varied with these prey categories. Third, the contribution of relative diet composition to diet-otolith shape co-variation was much higher than that of ingested food quantity. Fourth, the energetic composition of diet was related to otolith shape of only 1 species. These results suggest that diet in marine fish species may influence the quantity and composition of saccular endolymph proteins which play an important role in otolith biomineralization and their resulting 3D structure.
@article{mille_diet_2016,
	title = {Diet is correlated with otolith shape in marine fish},
	volume = {555},
	issn = {0171-8630},
	doi = {10.3354/meps11784},
	abstract = {Previous studies have shown that the amount of food influences fish otolith structure, opacity and shape and that diet composition has an effect on otolith chemical composition. This study investigated the potential correlation between diet and otolith shape in 5 wild marine fish species by addressing 4 complementary questions. First, is there a global relationship between diet and otolith shape? Second, which prey categories are involved in this relationship? Third, what are the respective contributions of food quantity and relative composition to diet-otolith shape co-variation? Fourth, is diet energetic composition related to otolith shape? For each species, we investigated how otolith shape varies with diet. These questions were tackled by describing diet in the analysis in 4 different ways, while also including individual-state variables to remove potential confounding effects. First, besides the strong effect of individual-state, a global relationship between diet and otolith shape was detected for 4 out of 5 fish species. Second, both main and secondary prey categories were related to variability in otolith shape, and otolith outline reconstructions revealed that both otolith global shape and its finer details co-varied with these prey categories. Third, the contribution of relative diet composition to diet-otolith shape co-variation was much higher than that of ingested food quantity. Fourth, the energetic composition of diet was related to otolith shape of only 1 species. These results suggest that diet in marine fish species may influence the quantity and composition of saccular endolymph proteins which play an important role in otolith biomineralization and their resulting 3D structure.},
	language = {English},
	journal = {Marine Ecology Progress Series},
	author = {Mille, T. and Mahe, K. and Cachera, M. and Villanueva, M. C. and de Pontual, H. and Ernande, B.},
	month = aug,
	year = {2016},
	note = {00000 
WOS:000383801600012},
	keywords = {ACL, E3, English Channel, Fourier analysis, Interspecific, Morphometric analysis, Otolith growth, Saccular otolith, Stomach contents, atlantic cod, cod gadus-morhua, condition indexes, increment widths, individual foraging specialization, movement patterns, somatic growth, stable-isotopes, stock   discrimination, trout   oncorhynchus-mykiss},
	pages = {167--184}
}
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