Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/23413
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Effects of on-demand feeding on sea urchin larvae (Paracentrotus lividus; Lamarck, 1816), development, survival and microalgae utilization (Forthcoming/Available Online)
Authors: Brundu, Gianni
Vallainc, Dario
Baroli, Maura
Figus, Assunta Maria
Pinna, Alessio
Carboni, Stefano
Contact Email: stefano.carboni@stir.ac.uk
Keywords: sea urchin
Paracentrotus lividus
larviculture
survival
development
Issue Date: 29-Jan-2016
Publisher: Wiley-Blackwell
Citation: Brundu G, Vallainc D, Baroli M, Figus AM, Pinna A & Carboni S (2016) Effects of on-demand feeding on sea urchin larvae (Paracentrotus lividus; Lamarck, 1816), development, survival and microalgae utilization (Forthcoming/Available Online), Aquaculture Research.
Abstract: This study compared the growth of sea urchinParacentrotus lividuslarvae cultured using two different rearing methods: a variable method based on a variable amount of feed (microalgae) and seawater exchange (30% or 50%) established according to the phytoplankton concentration in the larval cultures and a fixed method characterized by a fixed amount of feed and seawater exchange. Three microalgae diets,Isochrysissp. (Tahitian strain, T-Iso),Chaetoceros gracilisand a 50:50 mixed diet, were tested with both rearing methods. Larval development and survival were assessed at the 6-arm pluteus stage (P6), competence (Cp) and metamorphosis (Mt). Data showed that the variable method reduced the requirements for phytoplankton and seawater exchange. Indeed, through the optimization of feed rations, it was possible to reduce the production of debris and settled phytoplankton, minimizing the need for water exchanges. Higher larval survival resulted at Cp and Mt stages for those reared with the variable method as opposed to the fixed one. Survival and development were also influenced by the tested dietary treatments: at Mt stage, the mixed diet resulted in a higher larval survival (63.3±8.9%) than T-Iso (19.7±12.1%) andC. gracilis(23.4±15.1%) (P<0.05). These results suggest that the use of the variable method improves the larval survival and development and also it reduces resource consumption (phytoplankton, seawater use and work effort), which in turn could potentially improve the hatchery production ofP.lividus.
Type: Journal Article
URI: http://hdl.handle.net/1893/23413
DOI Link: http://dx.doi.org/10.1111/are.12990
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: International Marine Centre (IMC)
International Marine Centre (IMC)
International Marine Centre (IMC)
International Marine Centre (IMC)
International Marine Centre (IMC)
Aquaculture

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