Effect of shear velocity and flow regimes on scallop post-larval detachment feed on two different diets
|Author(s)||Gagne Renee1, Tremblay Rejean1, Olivier Frederic1, 2, Pernet Fabrice3, Miner Philippe4, Samain Jean-Francois4|
|Affiliation(s)||1 : Univ Quebec, Inst Sci Mer, Rimouski, PQ G5L 3A1, Canada.
2 : CRESCO, CNRS MNHN IRD P6, UMR BOREA 7208, Museum Natl Hist Nat,Dept Milieux & Peuplements A, F-35800 Dinard, France.
3 : IFREMER, Lab Environm Ressources, F-34203 Sete, France.
4 : IFREMER DRV A, Lab Physiol Mollusques, Ctr Brest, F-29280 Plouzane, France.
|Source||Aquaculture (0044-8486) (Elsevier Science Bv), 2012-12 , Vol. 370-371 , P. 172-178|
|WOS© Times Cited||3|
|Keyword(s)||Attachment, Pecten maximus, Benthic boundary layer, Flume, Diet|
|Abstract||Through biological flume experiments, we studied the effect of shear velocity and attachment period on the percent detachment of Pecten maximus post-larvae of different sizes reared on two experimental diets. The first diet, (Pavlova lutheri, Isochrysis galbana, Chaetoceros calcitrans), which served as a reference diet (PTC), is commonly used in bivalve hatcheries; the second is the PTC diet with the addition of Rhodomonas salina (PTCR). Our results indicate that the detachment of post-larvae fed PTCR diet showed significant interactions between scallop length, attachment period and shear stress, while the post-larvae feed with the PTC diet showed only effect of shear stress factor. Furthermore, post-larvae exposed to various flume velocities showed different percentages of detachment according to diet (PTC=36% and PTCR=57%) for flow velocities between 1.42 to 2.45 cm s(-1) after 12 h attachment periods. This result could be related to differences in the biochemical composition of post-larvae as discussed. (C) 2012 Elsevier B. V. All rights reserved.|