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11 results for “chaoborus”
Figure 1 in Lethal and sublethal effects of exposure to Roundup 360 Plus for the Chaoborus flavicans larvae (Diptera: Chaoboridae)
Figure 1. The distribution of C. flavicans larvae within the water column under different concentrations of GLY. Box-mean, whisker-SD, n = 10, 0-close to the bottom, 1-in the water column, 2-close to the surface of the water. The letters above boxes indicate significant differences between time points (Tukey test, p <0.05)
Figure 2 in Lethal and sublethal effects of exposure to Roundup 360 Plus for the Chaoborus flavicans larvae (Diptera: Chaoboridae)
Figure 2. Morphological malformations of C. flavicans larvae. a– control organisms. Note two pairs of air sacs (arrows) and the digestive system (arrowhead). b– magnified picture of a pair of air sacs of a control insect. Note the regular distribution of chromatophores over the sacs. c– C. flavicans larva exposed to 20 µg/L GLY. Note altered pigmentation of the air sacs (arrow) and contortion of the body. d– C. flavicans larva exposed to 100 µg/L GLY. Note altered pigmentation, a contortion of the body that is close to the front air sacs (arrowhead), and darkening of the body. e, f– C. flavicans larva exposed to 400 µg/L GLY. Note the disappearance of pigmentation of air sacs, and the darkening of the body.
Depth profiles of water column dissolved methane, density and biomass of zooplankton (specifically, Chaoborus spp.), and measurements of methane extracted from Chaoborus spp. during two sampling campaigns in 2016
Depth profiles of water column dissolved methane (CH4), density and biomass of zooplankton (specifically, Chaoborus spp.), and measurements of methane extracted from Chaoborus spp. were collected from Beaverdam Reservoir, Vinton, VA, USA during two, 24-hr intensive sampling campaigns in fall 2016 (3-4 August and 16-17 September). The sampling campaign was designed to test the hypothesis that Chaoborus spp. can transport CH4 from the hypolimnion to the epilimnion of lakes and reservoirs as they migrate to the surface waters from the benthos at night in search of zooplankton prey, and results of the project are published in Carey et al. 2018. During both sampling events, depth profiles of water column methane and Chaoborus spp. density were collected at noon, dusk, midnight, 2 a.m., dawn, and noon the following day at a 1 m resolution. In addition, during the September sampling event depth profiles were collected 1 hour prior to and after dusk. Methane gas was extracted from live Chaoborus individuals at every depth and time point immediately after collection via gentle centrifugation in distilled water following McGinnis et al. 2017. REFERENCES: Carey, C.C., R.P. McClure, J.P. Doubek, M.E. Lofton, N.K. Ward, and D. Scott. 2018. Chaoborus spp. transport CH4 from the sediments to the surface waters of a eutrophic reservoir, but their contribution to water column CH4 concentrations and diffusive efflux is minor. Environmental Science & Technology. 52:1165-1173. DOI 10.1021/acs.est.7b04384 McGinnis, D. F., Flury, S., Tang, K. W., Grossart, H.-P. 2017. Porewater methane transport within the gas vesicles of diurnally migrating Chaoborus spp.: an energetic advantage. Scientific Reports. 7(44478) DOI 10.1038/srep44478
FIGURE 4 in A new species of the Chaoborus flavicans complex (Diptera, Chaoboridae) in South Korea
FIGURE 4. Chaoborus pseudoflavicans sp. nov., immature stages, (a) larva, habitus in lateral view (scale bar 1.0 mm), (b) pupa, habitus in lateral view (scale bar 1.0 mm), (c) larval mandibles (scale bar 50 μm), (d) larval blades (scale bar 50 μm), (e) respiratory organ (scale bar 500 μm). lb = larval blade, ant = antenna, md = mandible, ans = anal fan setae, ro = respiratory organ, tp = terminal process, Lt = lateral teeth, I–IV = mandibular teeth, III being the subordinate tooth.
FIGURE 3 in A new species of the Chaoborus flavicans complex (Diptera, Chaoboridae) in South Korea
FIGURE 3. Chaoborus pseudoflavicans sp. nov., hypopygium, (a) dorsal view (scale bar 200 μm), (b) parameres viewed in different positions (scale bar 50 μm). gst = gonostylus, pm = paramere, gx = gonocoxite, ac = apical claw.
FIGURE 1 in A new species of the Chaoborus flavicans complex (Diptera, Chaoboridae) in South Korea
FIGURE 1. Collection site of Chaoborus pseudoflavicans sp. nov. in Haenam, Jeollanam, South Korea (34°28'06.30"N, 126°31'02.31"E). All Chaoborids were collected as larvae in a small iced pond in February 2023.
FIGURE 6. A in A new species of the Chaoborus flavicans complex (Diptera, Chaoboridae) in South Korea
FIGURE 6. A neighbor-joining tree of the Chaoboridae species based on the pairwise distance model using the mitochondrial DNA barcoding region (COI). In all, 552 COI sequences (C. pseudoflavicans sp. nov., eight specimens sequenced in this study) were used to construct the NJ tree using MEGA 11. The red asterisk indicates that the collected Chaoborids clustered with Chaoborus JPN sp. (MK281356) with> 99% support, and black asterisks indicate the species of the C. flavicans species complex. The light blue shading indicates the recorded species of Chaoboridae in South Korea. Three species of Culicidae are used as outgroups. Triangles represent collapsed clades to save space. F = female, M = male, P = pupa, L = larva.
FIGURE 5 in A new species of the Chaoborus flavicans complex (Diptera, Chaoboridae) in South Korea
FIGURE 5. The distribution of pairwise genetic distances based on the pairwise distance model using the DNA barcoding regions (COI) of four species in the complex. The intraspecific variation is in black, and the interspecific variation in light blue.
FIGURE 2 in A new species of the Chaoborus flavicans complex (Diptera, Chaoboridae) in South Korea
FIGURE 2. Chaoborus pseudoflavicans sp. nov., adult male habitus in the (a) lateral and (b) dorsal views (scale bar 1.0 mm).
Chaoborus induced defences in Daphnia pulex (raw images)
<p>Raw images of Daphnia pulex exposed to control conditions or predator cues from Chaoborus larvae (<a href="/api/files/e95ff93a-55d1-46c8-b548-83c68b3fb4d7/DAPCHA_raw_images_Daphnia.tar.gz?versionId=0c3fee60-e92d-4a62-97b5-c2e571040c75">DAPCHA_raw_images_Daphnia.tar.gz</a>)</p> <p>Raw images of microstage meters; each image is associated with one respective Daphnia image to allow for size estimation of animals (see above) (<a href="/api/files/e95ff93a-55d1-46c8-b548-83c68b3fb4d7/DAPCHA_raw_images_MicrostageMeter.tar.gz?versionId=a0408c06-f030-4252-913f-231bd7928838">DAPCHA_raw_images_MicrostageMeter.tar.gz</a>) </p> <p> </p> <p>File names are coded as below:</p> <p>*_BARCODEid_PONDid_CLONEid_MICROSCOPEstation_DATE.TIME</p>
Emergence timing and voltinism of phantom midges, Chaoborus spp., in the UK., supplementary data
<p>Supporting water quality, environmental and biological data for draft manuscript.</p>
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