Effect of Rhodomonas salina addition to a standard hatchery diet during the early ontogeny of the scallop Pecten maximus
|Author(s)||Tremblay Rejean1, Cartier Simon1, Miner Philippe2, Pernet Fabrice3, Quere Claudie2, Moal Jeanne2, Muzellec Marie-Louise4, Mazuret Michel2, Samain Jean-Francois2|
|Affiliation(s)||1 : UQAR, Inst Sci Mer, Rimouski, PQ G5L 3A1, Canada.
2 : IFREMER, Ctr Brest, DRVA, Lab Physiol Mollusques, F-29280 Plouzane, France.
3 : Inst Rech Zones Cotieres, Shippegan, NB E8S 1J2, Canada.
4 : Ecloserie Tinduff, Comite Local Peches Maritimes Nord Finistere, F-29470 Plougastel Daoulas, France.
|Source||Aquaculture (0044-8486) (Elsevier), 2007-02 , Vol. 262 , N. 2-4 , P. 410-418|
|WOS© Times Cited||32|
|Keyword(s)||Algal fatty acids and sterols, Energetic content, Metamorphosis, Nutrition, Scallop|
|Abstract||The main objective of this study was to identify algal diets that maximize the survival and growth and alter the biochemical content of Pecten maximus larvae with the aim of improving metamorphosis. We also evaluated the potential of the cryptophyceae Rhodomonas salina as a food source for these larvae. Two flagellates, Isochrysis aff. galbana (T) and Pavlova lutheri (P), and two diatoms, Chaetoceros gracilis (C) or Skeletonema costatum (S), were tested as two ternary diets, namely PTC and PTS. PTC and PTS were compared with diets that also included R. salina (R). The addition of R. salina and the replacement of C. gracilis by S. costatum in the traditional hatchery diet seem to be two interesting alternatives for increasing the productivity of larval scallop culture and improving the metamorphosis rate. With these two diets, larval growth increased and metamorphosis was observed to occur more rapidly. Moreover, our results showed that the addition of R. salina significantly improved the overall condition of the larvae by promoting an increase in organic matter and total lipids. This accumulation of lipids during ontogeny seems to promote larvae to grow and to complete metamorphosis more rapidly than with the other diets. The level of polyunsaturated fatty acids in the algae could also at least partially explain the results obtained, since the PUFA level of C gracilis was about half those of S. costatum and R. salina. (c) 2006 Elsevier B.V. All rights reserved.|