Teleost and elasmobranch eye lenses as a target for life-history stable isotope analyses.

PeerJ · 2018 · PMC5991300 · PMID 29888128

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an increasing trendno p-value reported

Parry (2003) identified an increasing trend in δ 15 N values with body size in sequential samples of lens proteins from Ommastrephes bartramii and Sthenoteuthis oualaniensis , suggesting that ontogenetic trophic shifts are reflected and preserved within eye lens chemistry.

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