Eric Tamigneaux

Cégep de la Gaspésie et des îles · Merinov - CCTT des pêches

Seaweeds are a promising biomass resource that contain proteins with high potential for sustainable exploration. Palmaria palmata, one of the main red seaweeds of the Canadian coast, has a high protein content and much interest as an ingredient. Understanding the associations between environmental conditions and P. palmata color and chemical compos...

In the North-east (NE) Atlantic, most intertidal fucoids and warm-temperate kelps show unique low-latitude gene pools matching long-term climatic refugia. For cold-temperate kelps data are scarcer despite their unique cultural, ecological and economic significance. Here we test whether the amphi-Atlantic range of Laminaria digitata is derived from...

The bioremediation capacities of Palmaria palmata and Ulva lactuca for removing dissolved nutrients in a cold-seawater fully recirculated ecosystemic representation of an estuarine aquatic habitat were evaluated. The seaweeds were cultured in the laboratory based on environmental conditions observed in a large-scale aquarium representing the marine...

Climate-driven range-shifts have shaped extant patterns of diversity, including intra-specific population genetic structure. Studies of ancient marine distributions, inferred using phylogeographic and modeling approaches, have focused strongly on marine forests of brown macroalgae (kelps and fucoids), which occur on temperate rocky reefs and suppor...

Glacial vicariance is regarded as one of the most prevalent drivers of phylogeographic structure and speciation among high-latitude organisms, but direct links between ice advances and range fragmentation have been more difficult to establish in marine than in terrestrial systems. Here we investigate the evolution of largely disjunct (and potential...

The in vitro antioxidant activity and angiotensin-converting enzyme (ACE) inhibition potential of protein extracts of Palmaria palmata (dulse) red seaweed from the Gaspé coast (QC, Canada) were investigated. The effects of the algae geographical origin and cultivation conditions were also studied. The highest activity values were displayed by <10 k...

Aux latitudes moyennes, les grandes algues sont une composante essentielle des ecosystemes cotiers comme source de nourriture et d’habitat pour les communautes benthiques. Les assemblages de macroalgues dans l’ecosysteme marin du Saint-Laurent (EMSL) sont largement domines par les fucales (Fucus, Ascophyllum) dans l’etage mediolittoral et par les l...

The cold water macroalgae growing along rocky coastlines of Qubec are a valuable natural resource since they are used in the manufacture of a wide range of products. Presently, several companies harvest and process these seaweeds with the support of the NSERC Industrial Research Chair for Colleges in Marine Macroalgae which provides scientific know...

Étude de préfaisabilité technico-économique visant la mise en place d’une filière intégrée autour de la culture de la laminaire sucrée.

Caractériser les molécules d’intérêts présentes dans la laminaire sucrée (Saccharina Longicruris) et valoriser les résidus par l’élaboration de matériaux composites d’origine renouvelable.

The Grande-Entrée Lagoon (Magdalen Islands, Canada) has supported mussel (Mytilus edulis) cultivation for the last 25 years. Algal biomass in this lagoon is relatively low while heterotrophic plankton biomass is high. Although often considered herbivorous, it is known that filter-feeding bivalves can consume various types of food, from bacteria to...

Mussel culture has been on-going since 1984 in Grande-Entrée lagoon (Magdalen Islands, Gulf of St. Lawrence, Canada). This industry has grown approximately 10-times, to about 180 tons y−1 in 2006. The goal of this study was to examine the influence of mussel farming in this lagoon, focusing on the planktonic communities. The influence of the suspen...

Mussel culture in coastal environments relies on the availability of food of sufficient quality and quantity. Both to determine this availability and to examine impacts that this aquaculture practice may have on the environment, it is important to have good knowledge of the type of plankton communities present in aquaculture sites. It is usually th...

A seasonal monitoring of indigenous (Gaspé Bay, Carleton, Havre-St-Pierre, Magdalen Islands and Blanc-Sablon) and transplanted (Gaspé Bay, Carleton, Havre-St-Pierre) mussels from different farm sites of Eastern Quebec allowed us to study mussel physiology as a function of environmental factors. A positive influence of phytoplankton cell concentrati...

An index based on the digestive gland (DGI) of transplanted (Gaspé, Havre-St-Pierre and Grande-Rivière) and indigenous (Gaspé and Magdalen Islands) 1-year-old blue mussels (Mytilus edulis and Mytilus trossulus) from eastern Québec (Canada) was used to assess the nutritional quality of mussel farm sites. To understand variations of this index, the e...

Environmental conditions and seasonal dynamics of the 5μm phytoplankton were monitored in a temperate nearshore environment (Baie des Chaleurs, western Gulf of St Lawrence, Canada). Following the spring bloom, there was a sharp decrease in the contribution of >5μm phytoplankton to the chlorophylla biomass and primary production, so that the 5μm phy...

A wild strain of Dunaliella salina was isolated from a solar evaporation salt-pond in Araya (Estado Sucre, Venezuela) and grown in batch culture using relatively low illumination (80 μmol photon m-2 s-1). After the alga had been adapted to various salinities (9, 14, 21% w/v NaCl), the influence of nitrate concentration (882, 435, 212 μmol L-1 N) on...

Seasonal changes in the biomass and size structure of phytoplankton and protozooplankton and the grazing effect of protozooplankton on phytoplankton were assessed in a temperate nearshore environment (Baie des Chaleurs, western Gulf of St. Lawrence, Canada). The size structure of protozooplankton and phytoplankton assemblages showed relatively simi...

The present study assesses conditions that determine the dominance of (i) phytoplankton by cells >5 μm versus cells <5 p.m, (ii) phototrophic ultraplankton by prokaryotes versus eukaryotes, (iii) prokaryotes by phycocyanin-rich versus phycoerythrin-rich cyanobacteria, and (iv) eukaryotes by cryptophyte versus non-cryptophyte cells. In the Baie des...