# Global data set for nitrogen and carbon stable isotopes of tunas

Nathalie Bodin, Heidi Pethybridge, Leanne Duffy, Anne Lorrain, Valérie Allain, John Logan, Brittany Graham, Frédéric Ménard, C. Anela Choy, Christopher Somes, et al.

► To cite this version:

Nathalie Bodin, Heidi Pethybridge, Leanne Duffy, Anne Lorrain, Valérie Allain, et al. Global data set for nitrogen and carbon stable isotopes of tunas. Ecology, 2021, 102 (3), 10.1002/ecy.3265. hal-03203941

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Submitted on 21 Apr 2021

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Distributed under a Creative Commons Attribution 4.0 International License
Data Paper

*Ecology*, 102(3), 2021, e03265
© 2020 The Authors. *Ecology* © 2020 The Ecological Society of America

Global data set for nitrogen and carbon stable isotopes of tunas

NATHALIE BODIN ID<fnref n="1" />,<fnref n="1" />,¹² HEIDI PETHYBRIDGE ID<fnref n="3" />, LEANNE M. DUFFY ID<fnref n="4" />, ANNE LORRAIN ID<fnref n="5" />, VALÉRIE ALLAIN,<fnref n="6" />
JOHN M. LOGAN ID<fnref n="7" />, FRÉDÉRIC MÉNARD,<fnref n="8" /> BRITTANY GRAHAM,<fnref n="9" /> C. ANELA CHOY ID<fnref n="10" />, CHRISTOPHER J. SOMES ID<fnref n="11" />
ROBERT J. OLSON ID<fnref n="4" />, AND JOCK W. YOUNG<fnref n="3" />

*Citation:* Bodin N., H. Pethybridge, L. M. Duffy, A. Lorrain, V. Allain, J. M. Logan, F. Ménard, B. Gra-
ham, C. A. Choy, C. J. Somes, R. J. Olson, and J. W. Young. 2021. Global data set for nitrogen and carbon
stable isotopes of tunas. *Ecology* 102(3):e03265. 10.1002/ecy.3265

**Abstract.** Nitrogen and carbon stable isotope data sets are commonly used to assess com-
plex population to ecosystem responses to natural or anthropogenic changes at regional to glo-
bal spatial scales, and monthly to decadal timescales. Measured in the tissues of consumers,
nitrogen isotopes (δ¹⁵N) are primarily used to estimate trophic position while carbon isotopes
(δ¹³C) describe habitat associations and feeding pathways. Models of both δ¹⁵N and δ¹³C values
and their associated variance can be used to estimate likely dietary contributions and niche width
and provide inferences about consumer movement and migration. Stable isotope data have
added utility when used in combination with other empirical data sets (e.g., stomach content,
movement tracking, bioregionalization, contaminant, or fisheries data) and are increasingly
relied upon in food web and ecosystem models. While numerous regional studies publish tables
of mean δ¹⁵N and δ¹³C values, limited individual records have been made available for wider use.
Such a deficiency has impeded full utility of the data, which otherwise would facilitate identifica-
tion of macroscale patterns. The data provided here consist of 4,498 records of individuals of
three tuna species, *Thunnus alalunga*, *T. obesus*, and *T. albacares* sampled from all major ocean
basins from 2000 to 2015. For each individual tuna, we provide a record of the following: species
name, sampling date, sampling location, tuna length, muscle bulk and baseline corrected δ¹⁵N
values, and muscle bulk and, where available, lipid corrected δ¹³C values. We provide these indi-
vidual records to support comparative studies and more robust modeling projects seeking to
improve understanding of complex marine ecosystem dynamics and their responses to a chang-
ing environment. There are no copyright restrictions for research and/or teaching purposes.
Users are requested to acknowledge their use of the data in publications, research proposals,
websites, and other outlets following the citation instructions in Class III, Section B.

Key words: baseline isotopic variability; food web dynamics; Global Ocean; marine top predators;
pelagic ecosystem; scombrids; trophic position.

The complete data sets corresponding to abstracts published in the Data Papers section in the journal are published electronically
as Supporting Information in the online version of this article at http://onlinelibrary.wiley.com/doi/10.1002/ecy.3265/suppinfo.

<footnote n="1">¹Research Institute for Sustainable Development (IRD), Fishing Port, Victoria, Mahe P.O Box 449 Seychelles</footnote>

<footnote n="2">²Sustainable Ocean Seychelles (SOS), BeauBelle, Mahe, Seychelles</footnote>

<footnote n="3">³CSIRO Oceans and Atmosphere, Castray Esplanade, Battery Point, Hobart, Tasmania 7004 Australia</footnote>

<footnote n="4">⁴Inter-American Tropical Tuna Commission (IATTC), 8901 La Jolla Shores Drive, La Jolla, California 92037-1509 EE. UU. USA</footnote>

<footnote n="5">⁵IRD, University of Brest, CNRS, Ifremer, LEMAR, Technopôle Brest-Iroise, Rue Dumont d'Urville, Plouzané 29280 France</footnote>

<footnote n="6">⁶Pacific Community (SPC), 95 Promenade Roger Laroque BP D5, Nouméa 98848 New Caledonia</footnote>

<footnote n="7">⁷Massachusetts Division of Marine Fisheries, 836 S Rodney French Blvd, New Bedford, Massachusetts 02744 USA</footnote>

<footnote n="8">⁸Aix Marseille University, University of Toulon, CNRS, IRD, MIO, Campus de Luminy-Océanomed, Marseille 13009 France</footnote>

<footnote n="9">⁹National Institute of Water and Atmospheric Research (NIWA), 301 Evans Bay Parade, Hataitai, Wellington 6021 New Zealand</footnote>

<footnote n="10">¹⁰Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0218 USA</footnote>

<footnote n="11">¹¹GEOMAR Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, Kiel 24105 Germany</footnote>