Definition of suspension feeder in English:
Suspension feeding is the capture and ingestion of food particles that are suspended in water. These particles can include phytoplankton, zooplankton, bacteria, and detritus. Some suspension feeders are primarily grazers of planktonic algae, while others are carnivores, and some that feed at the sediment-water interface are primarily detritivores. Some suspension feeders are largely nonselective omnivores, whereas others display strong preferences for certain particles according to size or chemical properties.
The University of Washington Friday Harbor Laboratories and Department of Biology supplied facilities for this research. PRIN TETRIS 2010 grant (n. 2010PBMAXP_003) funded to Gianluca Sarà by the Italian Minister of Research and University (MIUR) supported this research. NSF grant OCE 0850809 supported research by K. Sebens.
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The 3-D printed model and experimental setup. (A–C) A digital rendering of the 3-D printed model that we designed for all experiments, shown from anterior (A), lateral (B) and dorsal (C) views. (D) A photograph of the model set up in the recirculating flow tank. In D, the dashed red line indicates the posterior extent of the vinyl operculum, and the arrows indicate where the anterior edge of the operculum is affixed to the model beneath the caulk. The model is 52 mm tall and 74 mm long. Scale bars, 1 cm.
Bizarre Ancient Sea Creature Was Well-Armed for Feeding
Now, Rahman and his colleagues have used fluid dynamics to show thatTribrachidium probably was a suspension feeder, meaning it ate floating organic particles out of the water. Modern suspension feeders include brittle stars, many crustaceans and bivalves.
Mapping Antarctic Suspension Feeder Abundances and Seafloor Food-Availability, and Modeling Their Change After a Major Glacier Calving
We then used the pre-calving statistical model to predict the spatial distribution of SF-cover in both the pre-calving and the post-calving environment. The difference between the resulting maps was used to make inferences about areas with expected increases and decreases in the abundance of suspension feeders. Further, we bootstrapped the parameters of the pre-calving statistical model to obtain estimates for the standard-deviation of the predictions.
Sponge excurrent flow rate was documented using acoustic velocimeters (AVs) that register currents in three dimensions using Doppler measurements. These nonintrusive instruments measure the 3 velocity components (u, v and w) at a small cylindrical shaped “sampling volume” (diameter 15 mm, length 18 mm) 15 cm from the probe tip. Because all the flow from the animal exits through a single large excurrent aperture (the osculum), measuring the flow leaving the osculum provides a good proxy for the activity of the flagellated chamber pumps.
Examples of observed and modelled magnitude of ‘area of influence’, S, as a function of the threshold velocity, U*. (a–c) Temora longicornis; (d–f) Centropages typicus. L and u are prosome length and swimming speed, respectively. Open circle, observed; filled circle with solid line, modelled.