WHAT THE EVIDENCE SAYS
Sakaoka and colleagues analyzed loggerhead hatchlings of known parentage using genetic assignments and incubation duration. Both maternal/paternal lineage and incubation history were associated with scute-count variation, challenging simple attribution of anomalous scutes to incubation conditions alone.
WHY IT MATTERS / OUR READ
Wildlife monitoring indicators need causal specificity: an anatomical irregularity can have more than one generating mechanism. Hatchling health assessments should not turn a single morphological sign into a climate-impact proxy without additional evidence.
CAVEATS / UNCERTAINTY
The hatchlings were captive-bred; incubation duration is an imperfect temperature proxy and anatomical variation is not itself proof of fitness loss.
SOURCE
BMC Ecology and Evolution — Sakaoka et al. (26 Oct 2026)
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