Effects of dietary microalgae on growth, survival and fatty acid composition of sea urchin Paracentrotus lividus throughout larval development

Abstract

This study investigated the growth, survival and fatty acid composition of sea urchin Paracentrotus lividus larvae fed four microalgal diets: Cricosphaera elongata, Pleurochrysis carterae, Tetraselmis suecica and Dunaliella tertiolecta (control). Larvae were successfully raised to competence for metamorphosis when fed C. elongata, P. carterae and D. tertiolecta diets but significant differences were found in survival rate and development. Larvae fed C. elongata showed 3 times higher survival and 20 % faster development than larvae fed the other two microalgae diets that supported development. In contrast, T. suecica failed to fully support development and larvae stalled at the four arms stage for more than 30 days. The urchin larvae could accumulate long-chain polyunsaturated fatty acids (LC-PUFA) such as docosahexaenoate (DHA; 22:6n-3), eicosapentaenoate (EPA; 20:5n-3) and arachidonate (ARA; 20:4n-6), either by assimilation and retention of dietary fatty acids, and/or synthesis from α-linolenic acid 18:3n-3 and linoleic acid 18:2n-6. Moreover, an accumulation of n-3 LC-PUFA and higher EPA/DHA and EPA/ARA ratios appeared to be associated with improved larval performance. The results indicate that live microalgae species, with appropriate fatty acid profiles are able to improve P. lividus larval performance, ultimately increasing hatchery profitability.

Actividad antioxidante del erizo de mar Mellita quinquiesperforata (Leske) e identificación de sus compuestos lipídicos mayoritarios

“…Los equinoideos, al igual que los holoturoideos, son organismos que presentan alto contenido de compuestos con gran interés nutricional para los humanos, tales como ácidos grasos, esteroles y aminoácidos, de ahí que algunas especies de erizos y pepinos de mar se han convertido en parte fundamental de la dieta en muchos países europeos y asiáticos, siendo China, Corea, Tailandia y Japón los que presentan el mayor consumo en todo el mundo (Carboni et al 2012, Pereira et al 2013. Estas propiedades han incrementado notoriamente el cultivo de este tipo de equinoideo, debido principalmente al gran aprecio alimenticio de que gozan sus gónadas, las cuales son comercializadas (Purcell et al 2012, Siikavoupio et al 2007).…”

Comparison of Fatty Acid and Proximate Composition between <i>Holothuria edulis</i> and <i>Holothuria scabra</i> Collected from Coastal Water of Sabah, Malaysia

“…Other possibility the synthesis of 20:4n-6 (ARA) in sea cucumber might be encouraged by the increase of levels of feed ingredients which have higher contents of 18:2n-6. PUFA desaturase and elongase activities might present in many marine invertebrates such as, sea urchin [30]. Parastichopus californicus, a cold water species that harvested in Alaska had higher EPA (22.60%) and lower ARA (7.10%) [7].…”

KERAGAAN REMATURASI GONAD INDUK TERIPANG PASIR, Holothuria scabra DENGAN PEMBERIAN JENIS PAKAN BERBEDA

“…Lemak selain sebagai sumber energi, juga digunakan untuk struktur sel telur dan perkembangan larva (Carboni et al, 2012). Asam lemak yang berperan dalam proses reproduksi khususnya asam arakidonat (ARA) dan EPA/DHA.…”