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Istituto di scienza dell'alimentazione

Torna all'elenco Contributi in rivista anno 2012

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Agar-based pellets as feed for sea urchins (Paracentrotus lividus): rheological behaviour, digestive enzymes and gonad growth

Anno di pubblicazione: 2012

Autori: A Fabbrocini, M G Volpe, M Di Stasio, R D’Adamo, D Maurizio, E Coccia, M Paolucci

Affiliazioni autori: ISMAR CNR, Lesina (FG), Italy ISA CNR, Avellino, Italy Department of Biological and Environmental Sciences, Faculty of Sciences, University of Sannio, Benevento, Italy

Autori CNR:

  • RAFFAELE D'ADAMO
  • MICHELE DI STASIO
  • ADELE FABBROCINI
  • MARINA PAOLUCCI
  • MARIA GRAZIA VOLPE

Abstract: The algal polysaccharide agar has long been used as a food binder due to its structure, rheological behaviour, stability and interactions properties that help to generate ¢rm, round, disk-shaped pellets that may be used in recirculating sea urchin-rearing systems. Three algae-based diets (Ulva lactuca, Gracilaria gracilis, Cystoseira sp.) containing 3% and 6% agar were tested on the sea urchin Paracentrotus lividus in order to examine the e¡ect of varying percentages of agar on pellet stability in water and sea urchin gonad growth. The kinetics of water absorption and solute leaching of pellets were measured by immersing quadruplicate samples of the pellets inwater for1,2,3,4,5 and 6 days. Our results show that the pellets had good water stability, were readily consumed by sea urchins and the presence of agar did not hamper sea urchin gonad growth. Animals fed Ulva-containing pellets reached a more advanced gametogenic stage with respect to animals fed Cystoseira- and Gracilaria-containing pellets. Moreover, the presence of agarase activity in the digestive system indicated that agar may be an energy source. Pellets are relatively low cost and easy to prepare and store. They may represent a useful resource for rearing sea urchins under intensive conditions.

Pagine da: 321

Pagine a: 331

Rivista:

Aquaculture research Blackwell Scientific,
Paese di pubblicazione: Regno Unito
Lingua: inglese
ISSN: 1355-557X

Numero volume: 43

Numero fascicolo: 3

Referee: Sì: Internazionale

Indicizzato da: ISI Web of Science (WOS) [000299833300001]

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