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47 results for “Suction feeding”
Data from: The interaction between suction feeding performance and prey escape response determines feeding success in larval fish
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Suction feeding by predators limits direct release of alarm cues in fishes
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Data from: Functional coupling in the evolution of suction feeding and gill ventilation of sculpins (Perciformes: Cottoidei)
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Data from: Hydrodynamic performance of suction feeding is virtually unaffected by variation in the shape of the posterior region of the pharynx in fish
To capture prey by suction, fish generate a flow of water that enters the mouth, and exits at the back of the head. It was previously hypothesized prey-capture performance is improved by a streamlined shape of the posterior region of the pharynx, which enables an unobstructed outflow with minimal hydrodynamic resistance. However, this hypothesis remained untested for several decades. Using computational fluid dynamics simulations, we now managed to quantify the effects of different shapes of the posterior pharynx on the dynamics of suction feeding, based on a feeding act of a sunfish (Lepomis gibbosus). In contrast to what was hypothesized, the effects of the imposed variation in shape were negligible: flow velocity patterns remained essentially identical, and the effects on feeding dynamics were negligibly small. This remarkable hydrodynamic insensitivity implies that, in course of the evolution, the observed wedge-like protrusions of the pectoral surfaces of the pharynx probably resulted from spatial constraints and/or mechanical demands on the musculoskeletal linkages, rather than constraints imposed by hydrodynamics. Our study therefore exceptionally shows that a streamlined biological shape subjected to fluid flows is not always the result of selection for hydrodynamic improvement.
Data from: Hydrodynamic performance of suction feeding is virtually unaffected by variation in the shape of the posterior region of the pharynx in fish
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Fig. 4 in Evolution and diversity of ram-suction feeding in damselfishes (Pomacentridae)
Fig. 4 Representation of the two main components of the Phylo-PCA (a) and PCA (b) made with five kinematic variables (predator-prey distance, body-ram distance, protrusion distance, suction distance, and strike duration). White dots correspond to no-zooplanktivorous species with the cerato-mandibular (c-md) ligament (no-zoo), red dots correspond to zooplanktivorous species with the c-md ligament (zoo.1), and orange dots correspond to zooplanktivorous species without the c-md ligament (zoo.2). For the phylo-PCA, phylogenetic relationships are highlighted in blue. The standard ellipses areas are represented by gray, red, and orange ellipses for no-zoo, zoo.1, and zoo.2 species, respectively. The convex hull areas are illustrated by gray, red and orange polygons for no-zoo, zoo.1, and zoo.2 species, respectively
Fig. 3 in Evolution and diversity of ram-suction feeding in damselfishes (Pomacentridae)
Fig. 3 Representation of the different parameters measured to assess ram and suction performances in damselfishes. Mean per species are represented; for variables of distance (A, C-G), the phylogeny size corrected residuals are used. The nozooplanktivorous species with the cerato-mandibular (c-md) ligament are represented in white, the zooplanktivorous species with the c-md ligament are in red, and the zooplanktivorous without the cmd ligament are highlighted in orange
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.