What can DNA in fish stomachs can tell us about the Southern Ocean?

Mesopelagic fish form an important link betweenzooplankton and higher trophic levels in Southern Oceanfood webs, however, their diets are poorly known. Mostof the dietary information available comes from morphologicalanalysis of stomach contents (Hopkins andTorres, 1989; e.g. Gaskett et al., 2001; P...

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Bibliographic Details
Main Authors: Clarke, LJ, Trebilco, R, Walters, A, Polanowski, AM, Deagle, BE
Other Authors: Welsford, DC, Dell, J, Duhamel, G
Format: Conference Object
Language:English
Published: Australian Antarctic Division 2019
Subjects:
mesopelagic zone
stomach content
food webs
energy transfer
metabarcoding
jellyfish
Southern Ocean
Kerguelen
Indian
Online Access:https://eprints.utas.edu.au/30416/
https://eprints.utas.edu.au/30416/2/128579%20-%20What%20can%20DNA%20in%20fish%20stomachs%20can%20tell%20us%20about%20the%20Southern%20Ocean.pdf
http://heardisland.antarctica.gov.au/research/kerguelen-plateau-symposium/the-kerguelen-plateau-marine-ecosystems-and-fisheries
Description
Summary:Mesopelagic fish form an important link betweenzooplankton and higher trophic levels in Southern Oceanfood webs, however, their diets are poorly known. Mostof the dietary information available comes from morphologicalanalysis of stomach contents (Hopkins andTorres, 1989; e.g. Gaskett et al., 2001; Pusch et al.,2004; Shreeve et al., 2009) and to a lesser extent fattyacid and stable isotopes. DNA sequencing could substantiallyimprove our knowledge of mesopelagic fishdiets, but has not previously been applied. We usedhigh-throughput DNA sequencing (HTS) of the 18Sribosomal DNA and mitochondrial cytochrome oxidaseI (COI) to characterise stomach contents of fourmyctophid and one bathylagid species collected at thesouthern extension of the Kerguelen Plateau (southernKerguelen Axis), one of the most productive regions inthe Indian sector of the Southern Ocean.

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