ArticleBiology open2022
Heart rate as a proxy for estimating oxygen consumption rates in loggerhead turtles (Caretta caretta).
Article in Biology open, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Hematology of East Pacific green turtles (Chelonia mydas) in the Southern Gulf of California, Mexico: reference intervals of healthy turtles and intra-population comparisons.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2025Article
- Variation of thermal tolerance during northward range expansion in the invasive golden star tunicate,Conservation physiology · 2025Article
- Development of a non-invasive heart rate measurement method for sea turtles with dense keratinous scutes through effective electrode placement.Frontiers in physiology · 2024Article
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Heart rates of air-breathing diving animals can change on a short time scale due to the diving response during submergence. Heart rate is used frequently as a proxy for indirectly estimating metabolic rates on a fine time scale. However, most studies to date have been conducted on endothermic diving animals, and the relationships between metabolic rates and heart rates in ectothermic diving animals have not been well studied. Sea turtles are unique model organisms of diving ectotherms because they spend most of their life in the ocean and perform deep and/or long dives. In this study, we examined the relationship between heart rates and metabolic rates in captive loggerhead turtles, Caretta caretta, to estimate oxygen consumption rates during each dive based on heart rates. The oxygen consumption rates (V̇O2: mlO2 min-1 kg-1) and average heart rates (fH: beats min-1) were measured simultaneously in indoor tanks at water temperatures of 15-25°C. Our results showed that oxygen consumption rate was affected by heart rate and water temperature in loggerhead turtles. Based on the collected data, we formulated the model equation as V̇O2=0.0124fH+0.0047Tw - 0.0791. The equation can be used for estimating fine-scaled field metabolic rates in free-ranging loggerhead turtles. The results of this study will contribute to future comparative studies of the physiological states of ectothermic diving animals.
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