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18 results for “Vorticella”
Data from: The effect of external flow on 3D orientation of a microscopic sessile suspension feeder, Vorticella convallaria
<p><em>Vorticella convallaria</em> are microscopic sessile suspension feeders that live attached to substrates in aquatic environments. They feed using a self‐generated current and help maintain the health of aquatic ecosystems and wastewater treatment facilities by consuming bacteria and detritus. Their environmental impact is mediated by their feeding rate. In ambient flow, feeding rates are highly dependent on an individual's orientation relative to the substrate and the flow. Here, we investigate how this orientation is impacted by flow speed. Furthermore, we examined whether individuals actively avoid orientations unfavorable for feeding. We exposed individuals to unidirectional laminar flow at shear rates of 0, 0.5, 1.0, and 1.5 s<sup>−1</sup>, and recorded their 3D orientation using a custom biplanar microscope. We determined that <em>V. convallaria</em> orientation became progressively tilted downstream as the shear rate increased, but individuals were still able to actively reorient. Additionally, at higher shear rates, individuals spent a larger fraction of their time in orientations with reduced feeding rates. Our shear rates correspond to freestream flows on the scale of mm s<sup>−1</sup> to cm s<sup>−1</sup> in natural environments.</p>
Fig. 5 in First molecular identification of Vorticella sp. from freshwater shrimps in Tainan, Taiwan
Fig. 5. Bayesian phylogenetic tree of Vorticella sp. constructed from the nuclear ITS1-5.8S-ITS2 sequences. Sequences investigated in this study is in bold. Numbers numbers given at nodes of branches are the posterior probability (BI) and bootstrap (ML) values. The scale bar corresponds to 10 substitutions per 100 nucleotide positions. Classification follows that of Lynn (2008).
Fig. 2 in First molecular identification of Vorticella sp. from freshwater shrimps in Tainan, Taiwan
Fig. 2. Vorticella aequilata-like pop TW infected freshwater shrimps (Neocaridina Denticulata). (st) stalk. (sc) scopula. (FV) food vacuole. Scale bar: A = 500 μm; B- D = 100 μm.
Fig. 4 in First molecular identification of Vorticella sp. from freshwater shrimps in Tainan, Taiwan
Fig. 4. Bayesian phylogenetic tree of peritrich ciliates constructed from the nuclear ITS1-5.8S-ITS2 sequences. Sequence investigated in this study is in bold. Numbers given at nodes of branches are the posterior probability (BI) and bootstrap (ML) values. The scale bar corresponds to 10 substitutions per 100 nucleotide positions. Classification follows that of Lynn (2008).
Fig. 3 in First molecular identification of Vorticella sp. from freshwater shrimps in Tainan, Taiwan
Fig. 3. Scutariella sp. infected freshwater shrimps (Neocaridina Denticulata). (b) brain. (e) eye. (m) mouth. (p) pharynx. (t) testis. (te) tentacle. (vg) vitelline glands. Scale bar: A = 500 μm; B, D = 200 μm; C = 100 μm.
Figure 3 in The first finding of sessile ciliates Vorticella pyriforme Stiller, 1939 and Zoothamnium sinense Song, 1991 (Ciliophora, Peritrichia) in the Black Sea
Figure 3. General view of the colony Zoothamnium sinense Song, 1991 (original, in vivo), scale bar: 250 µm.
Figure 4. Zoothamnium sinense Song, 1991. A, C in The first finding of sessile ciliates Vorticella pyriforme Stiller, 1939 and Zoothamnium sinense Song, 1991 (Ciliophora, Peritrichia) in the Black Sea
Figure 4. Zoothamnium sinense Song, 1991. A, C – original, in vivo, scale bar: 35 µm; В – modified from Ji et al., 2006, scale bar: 20 µm.
Data from: The effect of external flow on 3D orientation of a microscopic sessile suspension feeder, Vorticella convallaria
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Fig. 1 in First molecular identification of Vorticella sp. from freshwater shrimps in Tainan, Taiwan
Fig. 1. Map of the Taiwan showing the location of the sampling site.
Figure 1 in The first finding of sessile ciliates Vorticella pyriforme Stiller, 1939 and Zoothamnium sinense Song, 1991 (Ciliophora, Peritrichia) in the Black Sea
Figure 1. Map of sampling area (September 2020).
Figure 10. Vorticella, a in Protozoan ciliate epibionts on the freshwater shrimp Caridina (Crustacea, Decapoda, Atyidae) from the Malili lake system on Sulawesi (Indonesia)
Figure 10. Vorticella, a specimen and its stalk.
FIGURE 3. Uorticella veloxiiforme n in Description of Two New Species of the Genus Vorticella (Ciliophora: Peritrichia) Epibionts on Pomacea canaliculata (Mollusca: Ampullariidae: Gastropoda) in Southern Brazil
FIGURE 3. Uorticella veloxiiforme n. sp. silver nitrate-stained species and SEM photomicrographs: A. Picture showing a zooid with horizontal striation and the trochal band (arrow) (Bar 10 µm). B. SEM micrograph of the zooid showing pellicular pores (arrow) (Bar 2 µm). C. Silver nitrate-stained zooid showing the silver lines on the pellicle (arrowheads) (Bar 20 µm).
FIGURE 5. Uorticella ampullaria n in Description of Two New Species of the Genus Vorticella (Ciliophora: Peritrichia) Epibionts on Pomacea canaliculata (Mollusca: Ampullariidae: Gastropoda) in Southern Brazil
FIGURE 5. Uorticella ampullaria n. sp. silver nitrate-stained specimens and SEM photomicrographs: A. Picture showing details of the pores on the pellicle (arrow) (Bar 2 µm). B. SEM micrograph of the zooid showing the trochal band (arrow) (Bar 2.5 µm). C. Silver nitrate-stained zooid showing the silver lines on the pellicle (arrow) (Bar 4 µm). D. Silver nitrate-stained zooid showing the macronucleus (MAC), scopula(SC), and somatic myonemes (arrowhead).
FIGURE 2 in Description of Two New Species of the Genus Vorticella (Ciliophora: Peritrichia) Epibionts on Pomacea canaliculata (Mollusca: Ampullariidae: Gastropoda) in Southern Brazil
FIGURE 2. Schematic drawings of Uorticella veloxiiforme n. sp. and Uorticela ampullaria sp.n. in vivo and from protargolstained specimens: A. Live zooid of U. veloxiiforme showing the contractile vacuole (CV) and a J-shaped macronucleus (MAC) (Bar 15 µm). B. Protargol-stained zooid of U. veloxiiforme showing the oral poliknetids inside the infundibular region (P1, P2, P3) (Bar 10 µm). C. Live zooid of U. ampullaria showing the position of the two contractile vacuoles (CV) and a Cshaped macronucleus (MAC) (Bar 15 µm). D. Protargol-stained zooid of U. ampullaria showing the oral polykinetids inside the infundibulum (P1, P2, P3) (Bar 10 µm).
FIGURE 1 in Description of Two New Species of the Genus Vorticella (Ciliophora: Peritrichia) Epibionts on Pomacea canaliculata (Mollusca: Ampullariidae: Gastropoda) in Southern Brazil
FIGURE 1. Uorticella veloxiiforme live and protargol-stained specimens: A. Live zooids showing the contractile vacuole (CV), a J-shaped macronucleus and a spasmoneme inside the basal stalk (SM) (Bar 10 µm). B. Live zooid showing the position of the J-shaped macronucleus (MAC) (Bar 10 µm). C. Protargol-stained zooid showing the J-shaped macronucleus (MAC) (Bar 10 µm). D. Detail of a protargol-stained zooid showing the oral polykinetids (P1, P2, P3) inside the infundibulum (Bar 10 µm). E. Protargol-stained zooid showing the somatic myonemes (arrow) (Bar 10 µm).
Figure 2. Vorticella pyriforme Stiller, 1939. A in The first finding of sessile ciliates Vorticella pyriforme Stiller, 1939 and Zoothamnium sinense Song, 1991 (Ciliophora, Peritrichia) in the Black Sea
Figure 2. Vorticella pyriforme Stiller, 1939. A – modified from Warren, 1986, scale bar: 25 µm; B – original, in vivo, scale bar: 75 µm.
FIGURE 4 in Description of Two New Species of the Genus Vorticella (Ciliophora: Peritrichia) Epibionts on Pomacea canaliculata (Mollusca: Ampullariidae: Gastropoda) in Southern Brazil
FIGURE 4. Uorticella ampullaria sp. n. live and protargol-stained specimens: A. Live zooid showing the position of the two contractile vacuoles (CV) and the spamoneme (SM) inside the basal stalk (Bar 10 µm). B. Live zooid showing the position of the aboral contractile vacuole (arrow) (Bar 10 µm). C. Live zooid showing the position of the oral contractile vacuole and Cshaped macronucleus (MAC) (Bar 10 µm). D. Protargol-stained zooid showing the oral polikinetids in the infundibular region (P1, P2, P3) (Bar 5 µm). E. Protargol-stained zooid showing details of the oral polikinetids 1 and 2 (Bar 5 µm). F. Protargolstained zooid showing the micro (MIC) and macronucleus (MAC) (Bar 5 µm).
FIGURE 6 in Description of Two New Species of the Genus Vorticella (Ciliophora: Peritrichia) Epibionts on Pomacea canaliculata (Mollusca: Ampullariidae: Gastropoda) in Southern Brazil
FIGURE 6. Maximum likelihood phylogeny (topology only) showing the placement of Uorticella veloxiiforme and Uorticella ampullaria (sequences in bold) in a phylogenetic tree of selected Peritrichia species, based on 18s rDNA sequences. Values above and below the branches indicate bootstrap values for adjacent nodes with Maximum likelihood (ML), Maximum parsimony (MP), and neighbor-joining (NJ), followed by the clade posterior probabilities (shown as percentages) estimated with BI. Bootstrap values are reported only for long branches or for the sequences obtained in this study.
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