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August 17, 2025Marine and Coastal FisheriesOpen Access

How body size and salinity affects thermal tolerance of a range-expanding fish

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Authors

BHBrittany Hall-ScharfQTQuenton M. TuckettPSPhilip W. Stevens

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Overview

Observational analysis shows reduced cold tolerance in larger juvenile snook at varying salinity levels, suggesting climate resilience implications.

Key Points

  • Juvenile snook exhibit lower cold tolerance in larger individuals, indicating a shift in thermal responses due to body size.
  • Small juvenile snook tolerated cold better at 3‰ salinity, while larger snook showed increased mortality at mid-salinity levels.
  • In chronic trials, large juveniles experienced death at 9.2°C in low- and high-salinity conditions, underscoring vulnerability to temperature change.
  • Understanding thermal tolerance in snook reveals implications for their survival with changing environments, especially as they expand their range.

Cite This Study

Hall-Scharf et al. (2025) studied this question.

synapsesocial.com/papers/68a36a3f0a429f797332e793https://doi.org/10.1093/mcfafs/vtaf023
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