The balancing act: Protein, lipid and seaweed dietary levels to maximize gonad quantity in a wild‐caught sea urchin

Warren‐Myers, Fletcher, Turchini, Giovanni, Swearer, Stephen E., Francis, David and Dempster, Tim 2021, The balancing act: Protein, lipid and seaweed dietary levels to maximize gonad quantity in a wild‐caught sea urchin, Aquaculture Nutrition, no. Online Version of Record before inclusion in an issue, doi: 10.1111/anu.13243.

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Title The balancing act: Protein, lipid and seaweed dietary levels to maximize gonad quantity in a wild‐caught sea urchin
Author(s) Warren‐Myers, Fletcher
Turchini, GiovanniORCID iD for Turchini, Giovanni orcid.org/0000-0003-0694-4283
Swearer, Stephen E.
Francis, DavidORCID iD for Francis, David orcid.org/0000-0002-4829-6926
Dempster, Tim
Journal name Aquaculture Nutrition
Issue number Online Version of Record before inclusion in an issue
Article ID 13243
Total pages 12
Publisher Wiley-Blackwell Publishing
Place of publication Chichester, Eng.
Publication date 2021
ISSN 1353-5773
1365-2095
Keyword(s) aquaculture
barren
formulated feed
roe enhancement
season
Summary Sea urchin gonads (roe) are a prized global sea food commodity, with growing demand driving the need for urchin roe enhancement aquaculture. Effective roe enhancement of urchins using formulated feeds require species‐specific optimization and an understanding of the interactions between key dietary components (e.g. protein, lipid, carbohydrate, energy and/or algal supplements). Here, we tested 18 formulated feeds on the sea urchin Heliocidaris erythrogramma, collected from barrens. The 18 iso‐energetic (~20 MJ/kg) feed combinations contained one of three protein levels (250, 375 or 500 g/kg), three lipid levels (73, 101 or 131 g/kg) combined with a single (45 g/kg Sargassum spp.) or multiple (45 g/kg Sargassum spp., 25 g/kg Solieria robusta, 25 g/kg Ulva lactuca) dried algal supplement. From two consecutive 12‐week enhancement trials, the most optimal feed type contained 375 g/kg protein, 73 g/kg lipid and a 45 g/kg algal supplement (Sargassum spp.) and produced gonad indices of 18.5 ± 0.4% (Trial 1) and 21.7 ± 1.2% (Trial 2). Across feed types, there was no significant difference in the proportion of marketable quality (A and B grade) roe produced (56%–85% Trial 1, 65%–85% Trial 2). We conclude that roe enhancement of H. erythrogramma collected from barrens is highly feasible.
Language eng
DOI 10.1111/anu.13243
Indigenous content off
Field of Research 0704 Fisheries Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2021, John Wiley & Sons
Persistent URL http://hdl.handle.net/10536/DRO/DU:30148498

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