Bibliografías temáticas / Mytilus edulis – Saint Lawrence, Gulf of

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Literatura académica sobre el tema "Mytilus edulis – Saint Lawrence, Gulf of"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 15 de febrero de 2022

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Artículos de revistas sobre el tema "Mytilus edulis – Saint Lawrence, Gulf of"

St-Jean, S. D., S. C. Courtenay, É. Pelletier, and R. St-Louis. "Butyltin Concentrations in Sediments and Blue Mussels (Mytilus edulis) of the Southern Gulf of St. Lawrence, Canada." Environmental Technology 20, no. 2 (1999): 181–89. http://dx.doi.org/10.1080/09593332008616807.

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Myrand, B., H. Guderley, and JH Himmelman. "Reproduction and summer mortality of blue mussels Mytilus edulis in the Magdalen Islands, southern Gulf of St. Lawrence." Marine Ecology Progress Series 197 (2000): 193–207. http://dx.doi.org/10.3354/meps197193.

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Ardisson, P. L., and E. Bourget. "Abundance, Growth, and Production Estimation of the Blue Mussel Mytilus edulis on Moored Navigation Buoys in the Estuary and Northwestern Gulf of St. Lawrence." Canadian Journal of Fisheries and Aquatic Sciences 48, no. 12 (1991): 2408–19. http://dx.doi.org/10.1139/f91-282.

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Production of Mytilus edulis was estimated from measurements of recruitment, growth, and abundances. The study is based on (1) yearly samplings carried out between 1975 and 1985 on 161 navigation buoys moored each year in the Estuary and Gulf of St. Lawrence and (2) monthly production estimates in a reference region in 1987. The relationships between production and maximum size, biomass, mean weight per individual, and abundance were calculated for this reference region. Maximum size and biomass were the parameters best reflecting production. Abundance and production estimates showed that the Gaspé Peninsula and the western North Shore zones were the most productive ones. The density-dependent mortality of individuals in crowded even-aged populations (self-thinning) was studied in the baie de Gaspé, the region showing the highest abundance and growth rate of Mytilus in the system. The slope of this relationship varied depending on initial density and age classes considered. These results, when compared with the theoretical value of the self-thinning model, suggest that the biomass observed on the buoys and the production estimates derived from them correspond to near-maximal values

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Gulllemette, Magella, John H. Himmelman, and Austin Reed. "Availability and consumption of food by common eiders wintering in the Gulf of St. Lawrence: evidence of prey depletion." Canadian Journal of Zoology 74, no. 1 (1996): 32–38. http://dx.doi.org/10.1139/z96-005.

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To quantify the influence of common eiders (Somateria mollissima) on their food supply in the Gulf of St. Lawrence, eastern Canada, we measured prey availability and patch utilization during two consecutive winters. In this region, eiders fed predominantly near submerged reefs where large populations of blue mussels (Mytilus edulis) and green sea urchins (Strongylocentrotus droebachienensis) were present. Density and biomass of mussels and urchins were estimated for two reefs at the beginning of the winter of 1985 – 1986 using SCUBA and quadrat sampling. Prey selection was assessed by comparing the size of prey from stomach contents of shot eiders with that of prey found in the habitat. Patch use was quantified from elevated blinds by regularly counting eiders from December to April. Mussels in the habitat were small (mean length 6.5 mm) and formed dense beds (mean density 25 398 individuals/m2), whereas urchins were large (mean diameter 35 mm) and occurred at lower densities (114 individuals/m2). However, the average biomass for these two prey species was similar, 2.8 and 3.1 kg wet mass/m2 for mussels and urchins, respectively. The mussels eaten by common eiders tended to be larger than the average size of those available. In contrast, urchins eaten were smaller than the average size present in the habitat. Depending on the reef, consumption of food by eiders ranged from 48 to 69% of the biomass for eiders feeding on mussels and from 3 to 6% of the biomass for urchins. We compared these estimates with those from similar studies and concluded that eiders substantially deplete mussel beds in winter, which in turn seems to affect their distribution.

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Montagnac, Valentin, Thomas Guyondet, Luc Comeau, and Réjean Tremblay. "Physiological differences between wild and cultured bivalves in Prince Edward Island, Canada." Aquatic Living Resources 33 (2020): 8. http://dx.doi.org/10.1051/alr/2020008.

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Bivalve culture in Canada increased by 25% from 2000 to 2016. In Prince Edward Island (PEI), bivalves are cultivated in bays and estuaries and there is limited space for further aquaculture expansion. Thus, there is merit in developing a numerical model determining the abundance of bivalve populations in relation to their food availability in order to assess the carrying capacity of shellfish growing areas. This modelling will take into account the different bivalve species present in the bay, as the cultivated Mytilus edulis and Crassostrea virginica and wild, M. edulis, C. virginica, Mya arenaria and Mercenaria mercenaria. As a first step toward a modelling goal, this study compared the physiological differences of the 6 bivalve groups. Three physiological parameters were measured: clearance rate, oxygen consumption and assimilation to determine the energy budget or scope for growth (SFG). These measurements were carried out on individuals contained in metabolic chamber at summer and autumn temperatures (20 and 8 °C, respectively). Our results show that M. edulis is best adapted to these temperature in PEI as it maintains high SFG at both temperatures. For C. virginica and M. arenaria, high physiological parameters under summer conditions were observed, followed by a decrease in autumn. For M. mercenaria rates were low at both temperatures indicating a persistently low growth potential. These results demonstrate the adaptive physiological capacity of each species and provide insight into the underlying reasons some species such as C. virginica and M. mercenaria are at their northern distribution limit in the Gulf of St. Lawrence. Finally, no differences in the SFG between cultivated and wild bivalves have been observed. These results are discussed within the context of estimating the impact of each bivalve group in bays environment from PEI and particularly on food availability.

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Gaymer, Carlos F., John H. Himmelman, and Ladd E. Johnson. "Distribution and feeding ecology of the seastars Leptasterias polaris and Asterias vulgaris in the northern Gulf of St Lawrence, Canada." Journal of the Marine Biological Association of the United Kingdom 81, no. 5 (2001): 827–43. http://dx.doi.org/10.1017/s0025315401004660.

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Extensive field observations were made in the Mingan Islands, northern Gulf of St Lawrence, to evaluate spatial and temporal variations in the use of habitat and prey resources by two major subtidal predators, the seastars Leptasterias polaris and Asterias vulgaris. Although both seastars have similar size structures and generally overlapped in their spatial and temporal distribution, the degree of overlap varied in different sites and appeared to be related to prey abundance, substratum type and slope. Three general patterns were observed: (1) both species aggregating in shallow water and decreasing in numbers with depth; (2) the two species showing inverse depth distributions; and (3) both seastars occurring in low numbers across the subtidal zone. Temporal changes in availability of the preferred prey of the two seastars, the mussel Mytilus edulis, appeared to be a major factor affecting their abundance and distribution. The two seastars occurred together in dense aggregations on mussel beds in shallow water. They consume similar-sized mussels until the number of mussels becomes reduced when A. vulgaris, but not L. polaris, begins to select larger mussels. Once a mussel bed is decimated, the seastars appear to move away, possibly in search of other beds. Intensive seastar foraging limits the distribution of mussels to a few metres in depth. Below the mussel zone, the two seastars are spatially segregated at a small spatial scale (1 m2 quadrat) and select different alternative prey, L. polaris feeding mainly on the crevice-dwelling clam Hiatella arctica and A. vulgaris on the ophiuroid Ophiopholis aculeata. The size partitioning of the preferred prey in shallow water, and spatial segregation and selection of different alternative prey at greater depths may reflect mechanisms permitting the two seastars to coexist.

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Zuykov, Michael, Julia Anderson, Philippe Archambault, France Dufresne, and Emilien Pelletier. "Mytilus trossulus and hybrid ( M. edulis-M. trossulus ) – New hosts organisms for pathogenic microalgae Coccomyxa sp. from the Estuary and northwestern Gulf of St. Lawrence, Canada." Journal of Invertebrate Pathology 153 (March 2018): 145–46. http://dx.doi.org/10.1016/j.jip.2018.02.017.

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Guillemette, Magella, John H. Himmelman, Cyrille Barette, and Austin Reed. "Habitat selection by common eiders in winter and its interaction with flock size." Canadian Journal of Zoology 71, no. 6 (1993): 1259–66. http://dx.doi.org/10.1139/z93-172.

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We studied habitat selection in relation to prey density and water depth in the common eider, Somateria mollissima L., wintering in the Gulf of St. Lawrence, eastern Canada. In this region, eiders are confronted with low temperatures, ice cover, and reduced day length. We predicted that they should select feeding habitats characterized by high prey density and shallow water to minimize the time and energy spent while diving. About 1000 flocks were localized by triangulation on our study site (20.5 km2). We inferred the diving depth and the habitat being used from the position of eiders on bathymetric and community maps. The highest density of prey occurred in shallow water reefs where there were patches of blue mussels, Mytilus edulis L., and green sea urchins, Strongylocentrotus droebachienensis (Müller). Despite the fact that eiders can dive to depths as great as 42 m to feed, they strongly aggregate in shallow water, and their distribution closely coincides with the highest density of prey. The degree of selection for the reef habitat varies with seasonal variations in the size of flocks and in the total number of eiders present. Although flocking as an antipredator behaviour cannot be rejected, we interpret the high degree of flocking by eiders in our study area as a strategy to facilitate feeding in winter.

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Cossa, D., and J. G. Rondeau. "Seasonal, geographical and size-induced variability in mercury content of Mytilus edulis in an estuarine environment: a re-assessment of mercury pollution level in the Estuary and Gulf of St. Lawrence." Marine Biology 88, no. 1 (1985): 43–49. http://dx.doi.org/10.1007/bf00393042.

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Tesis sobre el tema "Mytilus edulis – Saint Lawrence, Gulf of"

Petrović, Filip. "The importance of adult movement and aggregation for Mytilus spp. population dynamics in the St. Lawrence Estuary /." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101162.

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Mussel colonization is assumed to result from factors affecting recruitment and post-recruitment survival. Despite evidence of passive migration and habitat engineering by adult mussels, the contribution to population dynamics of these processes remains unknown. This research attempts to elucidate the relative importance and scale of (1) adult movement vs. recruitment and (2) of local habitat engineering vs. habitat heterogeneity, for colonization by the blue mussel, Mytilus spp., in the St. Lawrence Estuary, Quebec. Transplants of marked mussels were used to test these ideas. Our results support the hypothesis that colonization mostly occurs through disturbance-mediated adult movement. The scale of this displacement was quantified. Colonization was accelerated by topographic heterogeneity and engineered habitat propagation. These results counter the notion that mussel population dynamics are solely regulated by recruitment and growth, and suggest that distribution patterns are also upheld by adult aggregation and movement from the local scale to landscape level.

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Smith, Geneviève Kathleen. "Scales of coupling between benthic adults and larval recruits in the St. Lawrence Estuary." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101648.

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Recently, the assumption that marine populations are demographically open due to long-distance larval dispersal has increasingly been challenged. Here we present a large-scale, multi-year survey of blue mussel ( Mytilus spp.) abundance and recruitment along the Southern shore of the St. Lawrence Estuary, Quebec. Using spatial statistical tools we detected significant positive cross-covariance between upstream adults and downstream recruitment at a 14-35 km scale. Adult abundances in subsequent surveys proved to be best explained by past patterns of recruitment, rather than growth indices, or the local supply of recruits. Fucus spp., large macroalgae with much shorter planktonic periods, displayed no evidence of dynamic coupling. Recruitment was instead correlated with growth rate, indicating that local conditions may drive rates of reproduction by Fucus spp. plants. These results provide the first direct quantification of spatio-temporal demographic coupling between adult production and recruitment using survey data, with consequences for metapopulation and marine reserve design.

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