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| Redjah, I.; Olivier, Frederic; Tremblay, R.; Myrand, B.; Pernet, Fabrice; Neumeier, U.; Chevarie, L.. |
| Soft-shell clam, Mya arenaria, culture on the east coast of Canada is characterized by high loss following seeding. To evaluate the importance of passive transport due to currents, an experimental flume study was designed. The purpose was to measure the effects of hydrodynamic conditions, substrate, and clam size on dispersal in controlled laboratory condition and to interpret these results in relation to field measurements. Unidirectional currents with gradual increasing velocities (0 to 60 cm s(-1)) were applied to three substrates (muddy sand, medium sand, and coarse sand) in which clams from one of three size classes (10, 15, and 20 mm) had burrowed. We also examined the resulting effects of turbulent kinetic energy on the erosion of medium-grain sand... |
| Tipo: Text |
Palavras-chave: Clam transport; Substratum erosion; Unidirectional currents; Turbulence; ADV; Flume. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00014/12507/9368.pdf |
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| Seychelles, L. H.; Audet, C.; Tremblay, R.; Lemarchand, K.; Pernet, Fabrice. |
| The proliferation of bacteria in intensive aquaculture systems may be responsible for poor growth and mass mortality of marine fish larvae. Essential fatty acids provided in the diet could protect larvae by modulation of the immune response via arachidonic acid (AA) and eicosapentaenoic acid (EPA). Winter flounder Pseudopleuronectes americanus larvae were fed rotifers Brachionus plicatilis enriched with three commercial diets containing different fatty acid profiles. Bacterial colonization on the gills and skin and in the intestinal lumen was evaluated at the end of the rotifer feeding period (day 26), and growth was surveyed until metamorphosis. At 26 days post hatching, larvae fed rotifers containing the higher AA content and with a higher... |
| Tipo: Text |
Palavras-chave: Bacteria; Colonization; Fatty acids; Live feed; Winter flounder. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00031/14273/12399.pdf |
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| Crespel, Amelie; Dupont-prinet, A.; Bernatchez, L.; Claireaux, Guy; Tremblay, R.; Audet, C.. |
| In this study, an anadromous strain (L) and a freshwater-resident (R) strain of brook charr Salvelinus fontinalis as well as their reciprocal hybrids, were reared in a common environment and submitted to swimming tests combined with salinity challenges. The critical swimming speeds (Ucrit) of the different crosses were measured in both fresh (FW) and salt water (SW) and the variations in several physiological traits (osmotic, energetic and metabolic capacities) that are predicted to influence swimming performance were documented. Anadromous and resident fish reached the same Ucrit in both FW and SW, with Ucrit being 14% lower in SW compared with FW. The strains, however, seemed to use different underlying strategies: the anadromous strain relied on its... |
| Tipo: Text |
Palavras-chave: Hybrids; Local adaptation; Metabolism; Swimming performance. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00376/48703/49288.pdf |
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