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Otolith δ 13 C values as a metabolic proxy: Approaches and mechanical underpinnings

Otolith δ 13 C values as a metabolic proxy: Approaches and mechanical underpinnings
Otolith δ 13 C values as a metabolic proxy: Approaches and mechanical underpinnings

Knowledge of metabolic costs associated with maintenance, foraging, activity and growth under natural conditions is important for understanding fish behaviours and the bioenergetic consequences of a changing environment. Fish performance in the wild and within a complex environment can be investigated by analysing individual-level field metabolic rate and, at present, the natural stable carbon isotope tracer in otoliths offers the possibility to reconstruct field metabolic rate. The isotopic composition of carbon in fish otoliths is linked to oxygen consumption through metabolic oxidation of dietary carbon. The proportion of metabolically derived carbon can be estimated with knowledge of δ 13 C values of diet and dissolved inorganic carbon in the water. Over the past 10 years, new techniques to study fish ecology have been developed, and these can be used to strengthen the application of otolith δ 13 C values as a metabolic proxy. Here, we illustrate the great potential of the otolith δ 13 C metabolic proxy in combination with other valuable and well-established approaches. The novel approach of the otolith δ 13 C metabolic proxy allows us to track the effects of ontogenetic and environmental drivers on individual fish physiology, and removes a major obstacle to understanding and predicting the performance of free-ranging wild fish.

bioenergetics, field metabolic rate, isotopic mixing models, oxygen consumption
1323-1650
Chung, Ming Tsung
f6bb2904-ec3a-4986-9624-95f5fed6ec91
Trueman, Clive N.
d00d3bd6-a47b-4d47-89ae-841c3d506205
Godiksen, Jane Aanestad
ba7ae048-3672-4f1c-8614-b00d6b39f43a
Grønkjær, Peter
994a0ef7-69ec-45bd-9ce4-d655842e0d1f
Chung, Ming Tsung
f6bb2904-ec3a-4986-9624-95f5fed6ec91
Trueman, Clive N.
d00d3bd6-a47b-4d47-89ae-841c3d506205
Godiksen, Jane Aanestad
ba7ae048-3672-4f1c-8614-b00d6b39f43a
Grønkjær, Peter
994a0ef7-69ec-45bd-9ce4-d655842e0d1f

Chung, Ming Tsung, Trueman, Clive N., Godiksen, Jane Aanestad and Grønkjær, Peter (2019) Otolith δ 13 C values as a metabolic proxy: Approaches and mechanical underpinnings. Marine and Freshwater Research. (doi:10.1071/MF18317).

Record type: Article

Abstract

Knowledge of metabolic costs associated with maintenance, foraging, activity and growth under natural conditions is important for understanding fish behaviours and the bioenergetic consequences of a changing environment. Fish performance in the wild and within a complex environment can be investigated by analysing individual-level field metabolic rate and, at present, the natural stable carbon isotope tracer in otoliths offers the possibility to reconstruct field metabolic rate. The isotopic composition of carbon in fish otoliths is linked to oxygen consumption through metabolic oxidation of dietary carbon. The proportion of metabolically derived carbon can be estimated with knowledge of δ 13 C values of diet and dissolved inorganic carbon in the water. Over the past 10 years, new techniques to study fish ecology have been developed, and these can be used to strengthen the application of otolith δ 13 C values as a metabolic proxy. Here, we illustrate the great potential of the otolith δ 13 C metabolic proxy in combination with other valuable and well-established approaches. The novel approach of the otolith δ 13 C metabolic proxy allows us to track the effects of ontogenetic and environmental drivers on individual fish physiology, and removes a major obstacle to understanding and predicting the performance of free-ranging wild fish.

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MF18317 - Version of Record
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More information

Accepted/In Press date: 15 January 2019
e-pub ahead of print date: 26 March 2019
Keywords: bioenergetics, field metabolic rate, isotopic mixing models, oxygen consumption

Identifiers

Local EPrints ID: 430060
URI: http://eprints.soton.ac.uk/id/eprint/430060
ISSN: 1323-1650
PURE UUID: d0c31783-96f8-486e-8b4a-19915dd03fc2

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Date deposited: 11 Apr 2019 16:30
Last modified: 25 Nov 2021 21:52

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Contributors

Author: Ming Tsung Chung
Author: Jane Aanestad Godiksen
Author: Peter Grønkjær

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