Tissue-specific turnover rates and trophic enrichment of stable N and C isotopes in juvenile Atlantic cod Gadus morhua fed three different diets

• DOI: 10.3354/meps09871
• Publication Date: 2012-08-08T09:29:40Z
• Authors: T Ankjærø; JT Christensen; P Grønkjær
• Keywords: Whiting; Gadidae; Isotope Analysis

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 461:197-209 (2012) - DOI: https://doi.org/10.3354/meps09871 Tissue-specific turnover rates and trophic enrichment of stable N C isotopes in juvenile Atlantic cod Gadus morhua fed three different diets Torben Ankjærø, Jens Tang Christensen, Peter Grønkjær* Department Bioscience, Ecology, Aarhus University, 8000 C, Denmark *Email: [e-mail] ABSTRACT: A 150 d laboratory diet-shift study was conducted on L. examine (1) nitrogen carbon isotope rates, (2) tissue-specific relative contribution metabolism growth isotopic change, (3) diet−tissue white muscle, heart, whole blood, cranial bone collagen. Time- growth-based models described change δ15N δ13C tissues following a diet shift from pelleted food either blue mussels Mytilus edulis L., sandeel Ammodytes marinus Raitt., or whiting Merlangius merlangus diets. Cod ranged 1.5 2.0% d−1, with exception whiting-fed that experienced cessation after Day 86. Isotope expressed as half-lives (T½), differed little between expected fast-growing fish. For δ15N, heart tissue had shortest T½ while muscle longest (30.7 34.8 versus 35.7 77.9 d−1; range among diets). Heart also T½, whereas blood (25.5 38.5 49.5 60.3 Diet-tissue varied 0.8 5.1‰ (Δδ15N) 0.7 2.2‰ (Δδ13C). Growth accounted for most except all cod, where there significant effect change. Despite variability tissues, fish feeding 3 could be distinguished based their signatures. KEY WORDS: Isotopic · Diet 15N 13C Nitrogen Carbon Metabolism Full text pdf format PreviousNextCite this article as: Ankjærø T, Christensen JT, Grønkjær P Mar Ecol Prog Ser 461:197-209. Export citation Tweet linkedIn Cited by Published Vol. 461. Online publication date: August 08, 2012 Print ISSN: 0171-8630; 1616-1599 Copyright © Inter-Research.