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Gut contents and isotopic profiles of Salpa fusiformis and Thalia democratica

Citation

Ahmad Ishak, NH and Clementson, LA and Eriksen, RS and van den Enden, RL and Williams, GD and Swadling, KM, Gut contents and isotopic profiles of Salpa fusiformis and Thalia democratica, Marine Biology, 164 Article 144. ISSN 0025-3162 (2017) [Refereed Article]

Copyright Statement

Copyright 2017 Springer-Verlag Berlin Heidelberg

DOI: doi:10.1007/s00227-017-3174-1

Abstract

Little is known about the diet of planktonic tunicates such as salps, which can comprise around 80% of zooplankton abundance under bloom conditions. The gut contents of solitary and aggregate phases of the salps Thalia democratica and Salpa fusiformis were analysed with scanning electron microscopy (SEM), high-performance liquid chromatography (HPLC) and stable isotope analyses (SIA) to describe their diets under field conditions. The gut contents contained representatives of diatoms, dinoflagellates, haptophyte flagellates (Order Prymnesiales and Coccolithophorales), prasinophytes (Order Chlorodendrales) and, in a few instances, copepods (Crustacea). SEM confirmed the presence of many species of phytoplankton in the salp guts and was broadly supported by HPLC and SIA. The dominant peaks in the HPLC chromatograms corresponded to fucoxanthin, alloxanthin, chlorophyll b and β-carotene, indicating the ingestion of diatoms, cryptophytes and green algae. Solitary stages of both S. fusiformis and T. democratica fed on items that were not common in the phytoplankton samples, namely coccolithophores and copepods, respectively.

Item Details

Item Type:Refereed Article
Keywords:salps, chromatography, biomarkers, SEM
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Coastal and Estuarine Flora, Fauna and Biodiversity
Author:Ahmad Ishak, NH (Dr Nurul Ahmad Ishak)
Author:Eriksen, RS (Dr Ruth Eriksen)
Author:Williams, GD (Associate Professor Guy Williams)
Author:Swadling, KM (Dr Kerrie Swadling)
ID Code:117221
Year Published:2017
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2017-06-04
Last Modified:2018-04-20
Downloads:0

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