Abstract
We investigated the relationship between aspartic acid d:l ratios and otolith-derived age estimates in Gulf of Mexico red snapper, Lutjanus campechanus (ages 1–26 years; R2 = 0.89) and Caribbean yellowtail snapper, Ocyurus chrysurus (ages 2–17 years; R2 = 0.84). The estimated racemization rate was 0.61 × 10−3 year−1 for red snapper and 1.28 × 10−3 year−1 for yellowtail snapper, reflecting temperature differences between study regions. Mean jackknifed error in ages predicted from aspartic acid d:l was 1.70 ± 0.39 years for red snapper and 1.57 ± 0.41 years for yellowtail snapper. Results suggest amino acid racemization may be an effective tool for direct age estimation and potentially age validation in fishes.
Original language | English (US) |
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Pages (from-to) | 642-647 |
Number of pages | 6 |
Journal | Canadian Journal of Fisheries and Aquatic Sciences |
Volume | 80 |
Issue number | 3 |
DOIs | |
State | Published - Mar 2023 |
Keywords
- age validation
- amino acid racemization
- eye lens
- reef fish
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
- Aquatic Science