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Abstract: The feeding behavior of algal consumers inhabiting sandy beaches and the consequences of this behavior on their performance are poorly understood. Food quality has been shown to influence the food preference of algal consumers. However, food preference can often be altered or subordinated ...
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Despite growing concern for biodiversity loss, many coastal areas remain unexplored and their species composition and ecology virtually unknown. This study addressed these issues for intertidal communities of one of the few Atlantic Canada marine protected areas (MPAs). A nested sampling design was ...
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The European green crab (Carcinusmaenas) is a non-native invasive species to North America which has been found in the north-western At- lantic Ocean since the nineteenth century. In Prince Edward Island Canada, this species has been steadily increasing over the last 10 years, especially in estuarie...
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Patches of stranded macrophytes (wrack) are a distinctive feature of sandy beaches worldwide and a potential food subsidy for their resident communities. Despite their relevance, the spatial variation of wrack and its potential influence on upper shore beach organisms remain poorly understood. Wrack...
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The recent detection of the invasive colonial tunicate Diplosoma listerianum in Havre- Aubert, Magdalen Islands (Quebec, Canada) in 2008, prompted the development of a molecular assay as a method to detect and monitor for the potential invasion of this species in Prince Edward Island. The aim of thi...
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Blue mussel Mytilus edulis aquaculture lines and associated gear provide habitat for sessile and mobile epifaunal fouling organisms. Due to food limitations and substrate space, these species are likely to interact among themselves and with mussels. In some areas of Prince Edward Island and elsewher...
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The potential for predatory infaunal species to increase trophic complexity in marine sedimentary habitats has been debated in the past; however, the status of predatory infauna as a distinct trophic level remains controversial. Specifically, it is unclear whether these assemblages can be accurately...
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Naticid gastropod predators leave characteristic boreholes in the shells of their bivalve prey that allow the evaluation of spatial differences in occurrence and intensity of predation. This approach, extensively used in paleobiological research, was used to compare spatial variation in predation by...
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Given the logistical difficulties, cost, and time involved in species-level identifications, several authors have proposed the use of coarser taxonomic resolution (e.g. family, order) in studies of pollution. The use of surrogates instead of species relies on their sufficiency to detect community re...
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The relative importance of predatory decapod crustaceans in sedimentary communities depends on the spatial variability in their abundance and composition. At the scale of a fjord, such spatial patterns could be related to sill-mediated larval supply. This study examines larval and adult distribution...
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The collapse of the cod fishery in Newfoundland has coincided with marked increases in abundances of snow crab, pandalid shrimp, and other crustaceans that prey on sedimentary infauna. A 3-year sampling program in Bonne Bay, Newfoundland indicates differences in composition and number of these preda...
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This study explores the association of 24 polychaete species with sandy and muddy habitats located in a sub-arctic fjord, and across Atlantic Canada including Labrador, Newfoundland, and the Gulf of St. Lawrence. Key characters used to facilitate species identification are also summarized. Within Bo...
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We studied the infestation of the burrowing polychaete Polydora rickettsi on the shells of Crepidula fecunda in relation to the degree of intertidal exposure in Yaldad Bay (Chile). 175 specimens of C.fecunda were collected from five stations located at tidal levels experiencing air exposures of 0, 2...
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The role of predation in structuring soft-sediment communities varies as a function of the number and composition of predators that co-occur in a given habitat. In Bonne Bay, Newfoundland, contrasting abundances or predators in different areas of the bay may contribute to different regulatory roles ...
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The reproductive cycles of the bivalves Ensis macha (Molina, 1782), Tagelus dombeii (Lamarck, 1818), and Mulinia edulis (King, 183 1) were studied at six sites in southern Chile (38-43degreesS) from November 1996 to December 1997. Samples of E. macha came from three subtidal shallow depths; those of...
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The temporal variability in abundance and population structure of the gastropod Chilina ovalis Sowerby was studied in the upper intertidal zone of Queule River estuary, south-central Chile (c. 40 degreesS). Snails were collected monthly (September 1995-December 1997) from haphazardly-located quadrat...
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Eight sandy beaches were seasonally sampled along the coast of Chile, from ca. 21 to 42degrees S (about 3000 km) to study the relationship between community structure 2 of the intertidal macroinfauna and beach characteristics. Sediment samples (0.1 m(2), 30 cm deep) were collected (July-September 19...
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Ten sandy beaches along the coast of northern Chile (20-23 degreesS) were studied in December 1998, to examine the distribution, abundance, and habitat characteristics of the crab Ocypode gaudichaudii. Beach width. slope, and intertidal fringes were identified, and Dean's parameter, describing ...