Article (Scientific journals)
Comparison of isotopic turnover dynamics in two different muscles of a coral reef fish during the settlement phase
Gajdzik, Laura; Lepoint, Gilles; Lecchini, David et al.
2015In Scientia Marina, 79 (3), p. 325-333
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Keywords :
Acanthuridae; stable isotopes; development; ontogeny; metamorphosis; starvation; surgeonfish
Abstract :
[en] The temporal variation in carbon and nitrogen isotopic compositions (noted as δ13C and δ15N) was investigated in the convict surgeonfish (Acanthurus triostegus) at Moorea (French Polynesia). Over a period of 24 days, juveniles were reared in aquaria and subjected to two different feeding treatments: granules or algae. The dynamics of δ13C and δ15N in two muscles (the adductor mandibulae complex and the epaxial musculature) having different functions were compared. At the end of experiments, a steady-state isotopic system in each muscle tissue was not reached. Especially for the algal treatment, we found different patterns of variation in isotopic compositions over time between the two muscles. The turnovers of δ13C showed opposite trends for each muscle but differences are mitigated by starvation and by the metamorphosis. Our study highlighted that the metabolism of coral reef fish may be subjected to catabolism or anabolism of non-protein precursors at settlement, inducing variation in isotopic compositions that are not linked to diet change.
Research Center/Unit :
AFFISH-RC - Applied and Fundamental FISH Research Center - ULiège
Disciplines :
Zoology
Author, co-author :
Gajdzik, Laura ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Morphologie fonctionnelle et évolutive
Lepoint, Gilles  ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Océanologie
Lecchini, David
Frederich, Bruno  ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Morphologie fonctionnelle et évolutive
Language :
English
Title :
Comparison of isotopic turnover dynamics in two different muscles of a coral reef fish during the settlement phase
Publication date :
September 2015
Journal title :
Scientia Marina
ISSN :
0214-8358
eISSN :
1886-8134
Publisher :
Consejo Superior de Investigaciones Científicas. Institut de Ciències del Mar de Barcelona, Barcelona, Spain
Volume :
79
Issue :
3
Pages :
325-333
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique
ANR-06-JCJC 0012- 01
CRISP programme (Coral Reef Initiative in the South Pacific- C2A)
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since 16 September 2015

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