Effect of shear velocity and flow regimes on scallop post-larval detachment feed on two different diets

Type Article
Date 2012-12
Language English
Author(s) Gagne Renee1, Tremblay Rejean1, Olivier Frederic1, 2, Pernet FabriceORCID3, 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
DOI 10.1016/j.aquaculture.2012.10.017
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.
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