Chinook Salmon Thermal Tolerance Data from Full-Factorial Breeding Design

A coastal chinook salmon population was studied to evaluate the heritable variation underlying thermal tolerance. The data originates from a full-factorial breeding design measuring offspring cardiac function and critical thermal maximum (CTmax). Maternal effects, associated with egg size, were found to significantly influence resting heart rate, scope for heart rate, cardiac arrhythmia temperature, and CTmax.

Use Cases

• Analyze the relationship between maternal egg diameter and offspring CTmax to quantify indirect genetic effects on thermal tolerance.
• Model the influence of maternal effects on resting heart rate (fH) and scope for fH to understand physiological constraints.
• Assess the proportion of variation in resting fH explained by direct genetic effects (53%) versus maternal effects.
• Investigate correlations between cardiac arrhythmia temperature and CTmax across different family groups from the breeding design.

Strengths

• Data is derived from a controlled full-factorial breeding design, allowing for separation of genetic and maternal effects.
• Specific quantitative findings are reported, such as direct genetic effects explaining 53% of the variation in resting heart rate.
• Focuses on critical thermal maximum (CTmax) and cardiac performance metrics, which are key for climate adaptation studies.

Limitations

• The dataset size (number of rows/families) is not specified, limiting assessment of statistical power.
• Geographic scope is limited to a single coastal population, reducing generalizability to other salmon populations.
• Data collection concluded in 2020, and thermal tolerance baselines may have shifted since.

Provenance

Source

Dryad, author Nicolas J. Muñoz.

Collection Method

Full-factorial breeding design with measurements of offspring cardiac function and critical thermal maximum (CTmax).

Freshness

Last updated 2020-06-30.

Geography

A coastal population of chinook salmon (Oncorhynchus tshawytscha).