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Showing 1 to 10 of 10 for “"Macoma"”.
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Reproductive ecology and population dynamics of two sympatric species of Macoma (Bivalvia)
Populations of the sympatric intertidal bivalves, Macoma secta and M. nasuta are compared as to reproductive ecology and population dynamics. Histological examination of seasonal gonadal changes indicate that both species undergo dormancy in the winter months and rapid gamete proliferation in the …
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Contribuição ao conhecimento de Macoma (Austromacoma) constricta (Bruguière, 1792) (Bivalvia, Heterodonta, Tellinidae)
… occuring on the Brazilian coast. ln relation to Macoma (Austromacoma) constricta (Bruguière, 1792), a recente species which occurs from North Carolina (USA) to Rio Grande do Sul (Brazil), detailed studies were developed based both in the material examined and in the bibliography. These studies …
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A genetic and morphologic comparison of Macoma balthica from the eastern and western North Atlantic
Macoma balthica is a Tellinid bivalve that is common to both marine and estuarine soft-bottom habitats of the northern hemisphere. to determine if populations on the eastern and western North Atlantic are conspecific, the labial palp morphology, shell shape and genetic composition of these …
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Habitat use by juvenile female canvasbacks wintering on the upper Chesapeake Bay
… (> 200/m²) population of small (< 25 mm) Macoma balthica at night. Because of poorer Macoma populations on the east side of the Bay, canvasbacks there may feed more during the day and are in lower Macoma densities at night than west shore canvasbacks. Management of Chesapeake Bay …
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A computer aided palaeoecological study of selected Red Crag (Lower Pleistocene) gastropods
… however favoured the bivalves Spisula and Macoma which inhabited finer grained sediments. Rates of predation in these prey are shown to be comparable to those of the present day. The distribution of borehole loci is studied using a new method of producing composite diagrams of bored bivalve …
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Ecology of the infauna of Spurn Bight mudflats : an area proposed for reclamation
… within a, 'classic' boreal shallow mud 'Macoma' community distributed in relation mainly to sediment type and position on the shore. Ordination showed these to be continuous rather than discrete but the clusters were used as convenient units for extrapolation of single species' dynamics …
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The ecological role of feeding disturbances of the Atlantic horseshoe crab, Limulus polyphemus
… and oligochaetes. On the other hand, bivalve, Macoma balthica, abundance and biomass were significantly higher within exclusions. On the scale of the estuary, Limulus disturbance was found to contribute between 24% to 91% of the variability of total infaunal abundance, and had similarly …
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Dynamics and impacts of toxic Alexandrium catenella blooms in the Pacific Arctic
… 2022 bloom, toxicity in a bivalve population of Macoma calcarea on the southern Chukchi shelf was measured over three years, showing that this species serves as a reservoir for PSTs in the food web by retaining significant toxin levels for over a year after a bloom event. Beyond the persistence …
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The influence of a petrochemical discharge on the bioturbation and erosion potential of an intertidal estuarine mudflat (Humber estuary, UK)
… Corophium volutator, Streblospio shrubsolii and Macoma balthica.Bioturbation potential was significantly reduced (in terms of depth and burrow volume and density) by increasing effiuent concentrations and with proximity to the discharge. The diversity of both feeding and sediment modification …