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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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Seasonal sampling of sediments (May 1988-May 1989), carried out at two intertidal areas of the Queule River Estuary, was used to analyse the vertical distribution of the macroinfauna and sedimentological characteristics. In all seasons, the substratum characteristics of both areas showed small diffe...
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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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Two sandy beaches were studied in south - central Chile (ca., 39 degrees S), during 17 months to analyze the seasonal variability in population abundances and zonation of the most common species of the intertidal macroinfauna. The beaches displayed differences in mean grain size, Dean's parameter (a...
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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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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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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...