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Bibliographie de l'Institut Maurice-Lamontagne

Mollusques - Bivalves / Mytilus spp. / 

TREMBLAY, R., T. LANDRY, N. LEBLANC, F. PERNET, C. BARKHOUSE, J.-M. SÉVIGNY, 2011. Physiological and biochemical indicators of mussel seed quality in relation to temperatures. Aquat. Living Resour., 24(3): 273-282.

[Résumé disponible seulement en anglais]
The bivalve’s aquaculture industry is an important component of the economy in Eastern Canada. Seed collection is an initial and critical activity in most bivalve aquaculture industries including mussel farming in Prince Edward Island, production is entirely dependent on natural spat collection. Although seed supply is not a concern from a quantitative standpoint, there are growing concerns about the quality of natural seed. The general objective of this study was to identify and assess mussel seed quality criteria on the basis of physiological and biochemical status under laboratory and field conditions. The performance, as estimated by metabolic measurements, lipid class composition, multi-locus heterozygosity (MLH) and survival to stressful environment of seed from 6 different stocks sources was first compared under laboratory conditions at 12 °C and 25 °C. Results showed that MLH varied among the six sources of mussels in a way which is consistent with the physiological and biochemical indicators of seed quality. Mussels from Shippagan (New Brunswick) and Tracadie (Prince Edward Island) were found to have the highest quality scores and the best adaptive capacity to extreme water temperature under laboratory conditions. The results of the stock-site reciprocal field studies are in general agreement with those of the laboratory experiments with higher survival of mussels from Shippagan, Tracadie and St. Peters Bays in the various study sites. Our results suggest that the measure of MLH and survival curves at stressful temperature could be a good criteria combination to identify the improved survival potential of mussels stocks.©2011 EDP Sciences, IFREMER, IRD

LAUZON-GUAY, J.-S., D.A. LYONS, 2011. Reproducibility in simulation experiments : comment on Munguia et al. (2010). Mar. Ecol. Prog. Ser., 79: 275-287 .

[Résumé disponible seulement en anglais]
In a recent article, Munguia et al. (2010; Mar Ecol Prog Ser 413:229–240) presented a spatially explicit mathematical model of competition among 4 sessile species of benthic invertebrates. We argue that, based on the description of the model, it is impossible to repeat the analysis without making numerous guesses and assumptions. Furthermore, the results do not correspond to the model as it is described. We highlight elements of the model formulation and description relating to dispersal, colonization, and competition that, if clarified, would help the reader to understand, evaluate, and extend the results of this study.©2011 Inter-Research