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176 results for “Cladocerans”
Fig 5 in First report of the high altitude cladoceran species Streblocerus serricaudatus (Fischer, 1849) S.LAT from the Western Ghats of India, Tamil Nadu
Fig 5: Carapace.
Fig 4 in First report of the high altitude cladoceran species Streblocerus serricaudatus (Fischer, 1849) S.LAT from the Western Ghats of India, Tamil Nadu
Fig 4: Appendages
Fig 1 in First report of the high altitude cladoceran species Streblocerus serricaudatus (Fischer, 1849) S.LAT from the Western Ghats of India, Tamil Nadu
Fig 1: Collection locality of Pechiparai dam
Fig 7 in First report of the high altitude cladoceran species Streblocerus serricaudatus (Fischer, 1849) S.LAT from the Western Ghats of India, Tamil Nadu
Fig 7: Posterior part of the shell valve showing the reticulations.
Fig. 2 in The role of cladocerans in green and brown food web coupling
Fig. 2. Mean and standard error for values of δ13C and δ15N for the three lagoons analyzed.
Fig. 1 in The role of cladocerans in green and brown food web coupling
Fig. 1. Map of the sampling locations. Font: PEREIRA, Jaime Luiz Lopes, 2021.
Fig. 16. Oxyurella singalensis parthenogenic female. A in Taxonomy and distribution of four Cladoceran families (Branchiopoda: Cladocera: Moinidae, Bosminidae, Chydoridae and Sididae) in Philippine inland waters
Fig. 16. Oxyurella singalensis parthenogenic female. A, Habitus; B, Antennae; C, Post abdomen.
Fig. 12. Alona pulchella parthenogenic female. A in Taxonomy and distribution of four Cladoceran families (Branchiopoda: Cladocera: Moinidae, Bosminidae, Chydoridae and Sididae) in Philippine inland waters
Fig. 12. Alona pulchella parthenogenic female. A, habitus; B, antennae; C, post abdomen.
Fig. 9. Ephemeroporus barroisi parthenogenic female. A in Taxonomy and distribution of four Cladoceran families (Branchiopoda: Cladocera: Moinidae, Bosminidae, Chydoridae and Sididae) in Philippine inland waters
Fig. 9. Ephemeroporus barroisi parthenogenic female. A, habitus; B, labrum; C, post abdomen.
Fig. 10 in Taxonomy and distribution of four Cladoceran families (Branchiopoda: Cladocera: Moinidae, Bosminidae, Chydoridae and Sididae) in Philippine inland waters
Fig. 10. Scanning electron micrographs of Ephemeroporus barriosi. A, habitus; B, antennae.
Fig. 28 in Taxonomy and distribution of four Cladoceran families (Branchiopoda: Cladocera: Moinidae, Bosminidae, Chydoridae and Sididae) in Philippine inland waters
Fig. 28. Scanning electron micrographs of Diaphanosoma sarsi. A, habitus; B, antennule.
Data from: Macroecological predictors of evolutionary and plastic potential do not apply at microgeographic scales for a freshwater Cladoceran under climate change
<p>Rapid evolutionary adaptation could reduce the negative impacts of climate change if sufficient heritability of key traits exists under future climate conditions. Plastic responses to climate change could also reduce negative impacts. Understanding which populations are likely to respond via evolution or plasticity could therefore improve estimates of extinction risk. A large body of research suggests that the evolutionary and plastic potential of a population can be predicted by the degree of spatial and temporal climatic variation it experiences. However, we know little about the scale at which these relationships apply. Here, we test if spatial and temporal variation in temperature affect genetic variation and plasticity of fitness and a key thermal tolerance trait (critical thermal maximum; CTmax) at microgeographic scales using a metapopulation of Daphnia magna. Specifically, we ask if: (1) there is microgeographic adaptation of CTmax and fitness to differences in temperature among the pools, (2) pools with greater temporal temperature variation have more genetic variation or plasticity in CTmax or fitness, and (3) increases in temperature affect the heritability of CTmax and fitness. Although we observed genetic variation and plasticity in CTmax and fitness, and differences in fitness among pools, we did not find support for the predicted relationships between temperature variation and genetic variation or plasticity. Furthermore, the genetic variation and plasticity we observed in CTmax is unlikely sufficient to reduce the impacts of climate change. CTmax plasticity was minimal and heritability was 72% lower when D. magna developed at the higher temperatures predicted under climate change. In contrast, the heritability of fitness increased by 53% under warmer temperatures suggesting an increase in overall evolutionary potential unrelated to CTmax under climate change. More research is needed to understand evolutionary and plastic potential under climate change and how that potential will be altered in future climates.</p>
Data from: Macroecological predictors of evolutionary and plastic potential do not apply at microgeographic scales for a freshwater Cladoceran under climate change
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FIGURE 3. Alonella dadayi Birge, 1910 parthenogenetic female from Pantanal, Brazil. A, trunk limb I. B in More than just the number of denticles: morphometric and limb variability in Neotropical cladoceran Alonella dadayi (Crustacea: Cladocera: Chydoridae)
FIGURE 3. Alonella dadayi Birge, 1910 parthenogenetic female from Pantanal, Brazil. A, trunk limb I. B, idem, arrows showing stiff setae on endites. C-D, idem, showing the variability of ODL and IDL. E, trunk limb II. F, idem, variability in the morphology of scrapers. G, trunk limb III. H, idem, outline of exopodite. I, trunk limb IV. J, idem, outline of exopodite. K, trunk limb V. L, idem, outline of exopodite. Scale bars = 50 μm. Figs. H, J, L were not scaled.
Data from: Turning defence into offence? intrusion of cladoceran brood chambers by a green alga leads to reproductive failure
Microalgae are the foundation of aquatic food webs. Their ability to defend against grazers is paramount to their survival, and modulates their ecological functions. Here we report a novel anti-grazer strategy in the common green alga Chlorella vulgaris against two grazers, Daphnia magna and Simocephalus sp. The algal cells entered the brood chamber of both grazers, presumably using the brood current generated by the grazer's abdominal appendages. Once inside, the alga densely colonised the eggs, significantly reducing reproductive success. The effect was apparent under continuous light or higher light intensity. The algal cells remained viable following removal from the brood chamber, continuing to grow when inoculated in fresh medium. No brood chamber colonisation was found when the grazers were fed the reference diet Raphidocelis subcapitata under the same experimental conditions, despite the fact that both algal species were readily ingested by the grazers and were small enough to enter their brood chambers. These observations suggest that C. vulgaris can directly inflict harm on the grazers' reproductive structure. There is no known prior example of brood chamber colonisation by a microalgal prey; our results point to a new type of grazer-algae interaction in the plankton that fundamentally differs from other antagonistic ecological interactions.
Data from: Effects of UVB radiation on grazing of two cladocerans from high-altitude Andean lakes
Climate change and water extraction may result in increased exposition of the biota to ultraviolet-B radiation (UVB) in high-altitude Andean lakes. Although exposition to lethal doses in these lakes is unlikely, sub-lethal UVB doses may have strong impacts in key compartments such as zooplankton. Here, we aimed at determining the effect of sub-lethal UVB doses on filtration rates of two cladoceran species (Daphnia pulicaria and Ceriodaphnia dubia). We firstly estimated the Incipient Limiting Concentration (ILC) and the Gut Passage Time (GPT) for both species. Thereafter we exposed clones of each species to four increasing UVB doses (treatments): i) DUV-0 (Control), ii) DUV-1 (0.02 MJ m2), iii) DUV-2 (0.03 MJ m2) and iv) DUV-3 (0.15 MJ m2); and estimated their filtration rates using fluorescent micro-spheres. Our results suggest that increasing sub-lethal doses of UVB radiation may strongly disturb the structure and functioning of high-altitude Andean lakes. Filtration rates of D. pulicaria were not affected by the lowest dose applied (DUV-1), but decreased by 50% in treatments DUV-2 and DUV-3. Filtration rates for C. dubia were reduced by more than 80% in treatments DUV-1 and DUV-2 and 100 % of mortality occurred at the highest UVB dose applied (DUV-3).
FIGURE 4. S. duranguensis n in A New Species of the Freshwater Cladoceran Genus Scapholeberis Schoedler, 1858 (Cladocera: Anomopoda) from the Semidesert Northern Mexico, Highlighted by DNA Barcoding
FIGURE 4. S. duranguensis n. sp. A. trunk limb I; B. trunk limb II; C. Gnathobase of trunk limb II; D. Gnathobase of trunk limb II of S. armata freyi for comparison; E. Trunk limb III; F. trunk limb IV. G. Trunk limb V. Initials: AS=Accessory Seta, EH=ejector hooks, EN=endopod, EX=exopod, PS=proximal seta, E=endite, GN=gnathobase, BS=brush-shaped setae
FIGURE 1 in A New Species of the Freshwater Cladoceran Genus Scapholeberis Schoedler, 1858 (Cladocera: Anomopoda) from the Semidesert Northern Mexico, Highlighted by DNA Barcoding
FIGURE 1. SEM photographs: A, B, D, G and H Scapholeberis duranguensis n. sp., parthenogenetic female. A. Anterior view of the head and rostrum (note the keels on the head, the reticulated rostrum and the pore at the top of the head); B. Head pore; D. Habitus; G and H. Posterior rim of valves (note the thick double membrane of which the upper one is denticulated); C, E, F, I, J, K and L Scapholeberis armata freyi, parthenogenetic female. C. Anterior view of the head and rostrum (note that there is not a pore-like structure at the top of the head); E and F. Lateral view of a cultured and a wild specimen, respectively, both parthenogenetic females; I to L. Posterior rim of the valves with denticulate membrane (note that the membrane is thinner than in S. duranguensis n. sp.)
FIGURE 3. S. duranguensis n in A New Species of the Freshwater Cladoceran Genus Scapholeberis Schoedler, 1858 (Cladocera: Anomopoda) from the Semidesert Northern Mexico, Highlighted by DNA Barcoding
FIGURE 3. S. duranguensis n. sp. A. Lateral view of ephippial female; B. Mandible; C. Antennule; D. Anterior view of the head; E. Upper view of the head; F. Antenna; G. Postabdomen and postabdominal claw.
FIGURE 2 in A New Species of the Freshwater Cladoceran Genus Scapholeberis Schoedler, 1858 (Cladocera: Anomopoda) from the Semidesert Northern Mexico, Highlighted by DNA Barcoding
FIGURE 2. SEM photographs: A, C, E and G Scapholeberis duranguensis n. sp. A. Ephippial female, lateral view; C. Ventral view of trunk limbs; E. Ejector hooks (note the length as compared to those of S. armata freyi); G. Postabdomen and postabdominal claw. B, D, F and H Scapholeberis armata freyi, ephippial female. B. Lateral view; D. Ventral view of trunk limbs; F. Ejector hooks; H. Postabdomen and postabdominal claw.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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