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293 results for “suction”
Suction feeding by predators limits direct release of alarm cues in fishes
<p>Chemical alarm cues alert aquatic prey to the presence of an actively foraging predator. There is a large literature based upon responses to alarm cues derived from skin extract, because it is anticipated that prey skin is damaged when prey are attacked by a predator. However, many predators feed by suction feeding whereby prey are quickly drawn into the buccal cavity and swallowed whole with little, if any, direct contact between the teeth of the predator and the prey. Here, we test if predation by suction feeding releases chemical information in sufficient quantity to elicit an antipredator response in conspecific prey. In tests of individual zebrafish <i>Danio rerio</i>, we found that odor of crushed zebrafish produced a clear antipredator behavioral response, but water collected immediately adjacent to staged predation events between a largemouth bass <i>Micropterus salmoides</i> (122-145 mm TL) and adult zebrafish (39 mm TL) did not elicit alarm behavior, and did not differ from behavioral responses to blank water or bass odor (on a diet of earthworms). In a second experiment, zebrafish swallowed by largemouth bass, then retrieved seconds later through gastric lavage, produced zebrafish that were alive and completely intact with minimal epidermal damage. Published relationships between bass length, gape size and the geometry of suction feeding suggest that in a hypothetical population of largemouth bass feeding on adult zebrafish, or fathead minnows, the majority of predation events by piscivorous fish probably would not release detectable levels of prey alarm cue. Accounting for the role of feeding mechanics by fish predators requires a recalibration of the literature on risk assessment by small prey fishes. Chemically-mediated antipredator behaviors against suction-feeding predators may occur primarily via post-ingestion dietary cues, or disturbance cues released near the moment of attack.</p>
Figure 3 in Drag of suction cup tags on swimming animals: Modeling and measurement
Figure 3. An illustration of the Model B tag in the water tunnel. Both models were mounted to the load cell via an extension used to submerge the test piece upside-down below the surface of the water tunnel. A grounding board surrounded the extension where the test piece was mounted to create a uniform ceiling for the test section, but the space above the grounding board was flooded.
Figure 1 in Drag of suction cup tags on swimming animals: Modeling and measurement
Figure 1. Tag housing designs in plan view (upper panels), longitudinal cross-section (middle panels) and frontal cross-section (bottom panels). The longitudinal cross-sections are taken along the center line of the tags (marked A-A in the upper panels). The frontal cross-section is the outer envelope of the shape that is exposed to the flow when the tag is aligned with its longitudinal axis parallel to the direction of motion (marked B-B in the upper panels). Dimensions are in millimeters.
Figure 5 in Drag of suction cup tags on swimming animals: Modeling and measurement
Figure 5. Detail of the flow path-lines around Models A and B. (A) Flow lines in the vicinity of a forward suction cup mounting pillar at a flow speed of 5.6 m/s demonstrating the flow disturbance created by the suction cups. The eddies and reduced speed result in larger forces acting on the tag. (B) Improved flow around the Model B tag design results from screening of the cups. (C) Flow through the channel underneath the Model B design showing flow detachment near the aft end of the channel.
Data from: Functional coupling in the evolution of suction feeding and gill ventilation of sculpins (Perciformes: Cottoidei)
Suction feeding and gill ventilation in teleosts are functionally coupled, meaning that there is an overlap in the structures involved with both functions. Functional coupling is one type of morphological integration, a term that broadly refers to any covariation, correlation, or coordination among structures. Suction feeding and gill ventilation exhibit other types of morphological integration, including functional coordination (a tendency of structures to work together to perform a function) and evolutionary integration (a tendency of structures to covary in size or shape across evolutionary history). Functional coupling, functional coordination, and evolutionary integration have each been proposed to limit morphological diversification to some extent. Yet teleosts show extraordinary cranial diversity, suggesting that there are mechanisms within some teleost clades that promote morphological diversification, even within the highly integrated suction feeding and gill ventilatory systems. To investigate this, we quantified evolutionary integration among four mechanical units associated with suction feeding and gill ventilation in a diverse clade of benthic, primarily suction-feeding fishes (Cottoidei; sculpins and relatives). We reconstructed cottoid phylogeny using molecular data from 108 species, and obtained 24 linear measurements of four mechanical units (jaws, hyoid, opercular bones, and branchiostegal rays) from micro-CT reconstructions of 44 cottoids and one outgroup taxon. We tested for evolutionary correlation and covariation among the four mechanical units using phylogenetically corrected principal component analysis to reduce the dimensionality of measurements for each unit, followed by correlating phylogenetically independent contrasts and computing phylogenetic generalized least squares models from the first principle component axis of each of the four mechanical units. The jaws, opercular bones, and branchiostegal rays show evolutionary integration, but the hyoid is not positively integrated with these units. To examine these results in an ecomorphological context, we used published ecological data in phylogenetic ANOVA models to demonstrate that the jaw is larger in fishes that eat elusive or grasping prey (e.g., prey that can easily escape or cling to the substrate) and that the hyoid is smaller in intertidal and hypoxia-tolerant sculpins. Within Cottoidei, the relatively independent evolution of the hyoid likely has reduced limitations on morphological evolution within the highly morphologically integrated suction feeding and gill ventilatory systems.
Modified Wet Suction Versus Capillary Techniques for EUS Guided Fine Needle Aspiration and Biopsy of Solid Lesions
ClinicalTrials.gov study NCT02919553. IPD Sharing: NO. Countries: 0. Publications: 6.
Suction Drainage in the Management of Peri-operative Bleeding in Total and Unicomcompartmental Knee Arthroplasty
ClinicalTrials.gov study NCT04508101. IPD Sharing: Not stated. Countries: 0. Publications: 1.
Trial Comparing the Laryngeal Tube Suction Disposable and the Supreme Laryngeal Mask Airway
ClinicalTrials.gov study NCT02856672. IPD Sharing: YES. Countries: 0. Publications: 1.
Nasal Suction in Infants With Bronchiolitis Using a NoseFrida vs. Bulb Syringe
ClinicalTrials.gov study NCT04599101. IPD Sharing: NO. Countries: 1. Publications: 0.
Sheathless, Traditional, and Suction Access Sheath RIRS for Renal Stones ≤2 cm
ClinicalTrials.gov study NCT07289230. IPD Sharing: YES. Countries: 1. Publications: 0.
Clinical Analysis of Suction Drainage in Cementless Hip Replacement
ClinicalTrials.gov study NCT04333264. IPD Sharing: Not stated. Countries: 0. Publications: 1.
Under Water Seal Versus Negative Pleural Suction in Chest Trauma Patients
ClinicalTrials.gov study NCT04673084. IPD Sharing: NO. Countries: 0. Publications: 1.
Safety and Efficacy of Lidocaine Infiltration in Suction Assisted Lipectomy
ClinicalTrials.gov study NCT00591487. IPD Sharing: Not stated. Countries: 1. Publications: 5.
Comparison of Two Methods of Securing Skin Grafts Using Negative Pressure Wound Therapy: Vacuum Assisted Closure (VAC) and Gauze Suction (GSUC)
ClinicalTrials.gov study NCT00952120. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Botox and Suction-Curettage for Treatment of Excessive Underarm Sweating (Axillary Hyperhidrosis)
ClinicalTrials.gov study NCT01274611. IPD Sharing: Not stated. Countries: 1. Publications: 0.
UACE Followed by Uterine Suction Curettage for the Treatment of Caesarean Scar Pregnancy
ClinicalTrials.gov study NCT02357095. IPD Sharing: Not stated. Countries: 0. Publications: 11.
Evaluation of Above the Cuff Suctioning During General Anesthesia
ClinicalTrials.gov study NCT01386879. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Endoscopic vs. Suction Device Calibration in Sleeve Gastrectomy
ClinicalTrials.gov study NCT03939819. IPD Sharing: NO. Countries: 1. Publications: 0.
Operative Hysteroscopy Versus Suction Curettage for Surgical Termination of Early Pregnancy Loss (Miscarriage)
ClinicalTrials.gov study NCT06309927. IPD Sharing: NO. Countries: 1. Publications: 0.
Prospective Trial Evaluating the Effect of Closed Suction Drainage Versus Straight Drainage After Distal Pancreatectomy
ClinicalTrials.gov study NCT02343302. IPD Sharing: Not stated. Countries: 1. Publications: 0.
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