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6,771 results for “freshwater”
FIGURE 6 in A new species of freshwater crab of the genus Badistemon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae: Potamiscinae) from Manipur State, India with the reassignment of Potamiscus pealianus (Wood-mason, 1871)
FIGURE 6. Badistemon turgidulum (Alcock, 1909), lectotype male (ZSI-C6952/2) (cw 28.7 mm × cl 23.5 mm): A. dorsal view of carapace; B. frontal view of cephalothorax; C. male thoracic sternum and pleon.
FIGURE 4. Badistemon fulvum n in A new species of freshwater crab of the genus Badistemon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae: Potamiscinae) from Manipur State, India with the reassignment of Potamiscus pealianus (Wood-mason, 1871)
FIGURE 4. Badistemon fulvum n. sp., holotype male (ZSI-C7543/2) (cw 48.7 mm × cl 39.5 mm): A. ventral view of left G1; B, dorsal view of left G1; C, ventral view of terminal segment of left G1; D, dorsal view of terminal segment of left G1; E, dorsal view of left G2. Scale bar=1 mm.
FIGURE 5. Badistemon fulvum n in A new species of freshwater crab of the genus Badistemon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae: Potamiscinae) from Manipur State, India with the reassignment of Potamiscus pealianus (Wood-mason, 1871)
FIGURE 5. Badistemon fulvum n. sp., holotype male (ZSI-C7543/2) (cw 48.7 mm × cl 39.5 mm): A. dorsal view of right G1; B, ventral view of left G1; C, dorsal view of right G2. Scale bar=2 mm.
FIGURE 3. Badistemon fulvum n in A new species of freshwater crab of the genus Badistemon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae: Potamiscinae) from Manipur State, India with the reassignment of Potamiscus pealianus (Wood-mason, 1871)
FIGURE 3. Badistemon fulvum n.sp., paratype female (ZSI-C7544/2) (cw 31.4 mm × cl 22.8 mm): A. dorsal view; B. frontal view; C. ventral view; D. thoracic sternites showing vulvae.
FIGURE 2. Badistemon fulvum n in A new species of freshwater crab of the genus Badistemon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae: Potamiscinae) from Manipur State, India with the reassignment of Potamiscus pealianus (Wood-mason, 1871)
FIGURE 2. Badistemon fulvum n.sp., holotype male (ZSI-C7543/2) (cw 48.7 mm × cl 39.5 mm): A. dorsal habitus; B. frontal view of cephalothorax; C. male thoracic sternum and pleon.
FIGURE 5 in Freshwater fishes from Paraná State, Brazil: an annotated list, with comments on biogeographic patterns, threats, and future perspectives
FIGURE 5. Cumulative number of lots of fish collected by state (marine lots included). The dashed line represents the approximate collection year of the first lots deposited in the state's main freshwater fish collections, especially MZUEL and NUP. State abbreviations: PR, Paraná; SP, São Paulo; RS, Rio Grande do Sul; MS, Mato Grosso do Sul.
FIGURE 4 in Freshwater fishes from Paraná State, Brazil: an annotated list, with comments on biogeographic patterns, threats, and future perspectives
FIGURE 4. Cumulative descriptions of the native freshwater fish species from Paraná State (blue line), species occurring naturally in the Paraná State, but originally described from São Paulo State (SP; green line) and species originally described from Paraná State (PR; red line). 1 = early descriptions of species from the upper rio Iguaçu basin (Haseman, 1911); 2 = foundation of main freshwater fish collections from Paraná State, especially MZUEL and NUP.
FIGURE 3 in Freshwater fishes from Paraná State, Brazil: an annotated list, with comments on biogeographic patterns, threats, and future perspectives
FIGURE 3. Number of species in the richest families of each order of the freshwater ichthyofauna from Paraná State, Brazil. Colors indicate orders.
FIGURE 1 in Freshwater fishes from Paraná State, Brazil: an annotated list, with comments on biogeographic patterns, threats, and future perspectives
FIGURE 1. Partial map of South America, with the Brazilian states outlined in black (Paraná State filled with blue). A) Map of Paraná State highlighting the ecoregions and sub-ecoregions. B) Sampling localities used to compile the list of the Paraná State freshwater fish species (red points). Each red point can represent more than one sampling site. Green bar = Sete Quedas waterfalls (currently submerged under the Itaipu Reservoir); black bar = Itaipu dam; blue bar = Iguaçu waterfalls.
Genetic diversity in the threatened freshwater mussel Lampsilis powellii
<p>North America is home to the greatest share of the world's freshwater mussel diversity; however, over 70% of its ~300 species are endangered or threatened. Lampsilis powellii, the Arkansas Fatmucket, is endemic to Arkansas and now restricted to upstream reaches of the Ouachita and Saline rivers, but the species is declining within this small range. Conservation actions such as augmenting or reintroducing populations may be necessary, but they require knowledge of the distribution of genetic variation within and among extant populations. We analyzed population structure between the South Fork Ouachita River and Saline River using a 607 base pair region of the mitochondrial COI gene and 14 microsatellites designed for Lampsilis abrupta. COI sequences showed little variation and the most common haplotype was present in both rivers. Our mtDNA sequences were indistinguishable from those of L. siliquoidea deposited on GenBank, but we were unable to make conclusions about the taxonomic distinctiveness of L. powellii. Microsatellites showed heterozygote deficiency for most loci and revealed little evidence of population structure between the two rivers. Overall, our results show low genetic diversity in L. powellii, which may reflect its small population size due to its long history of geographic isolation compounded by anthropogenic habitat destruction and fragmentation. Further genetic analyses of lampsiline taxa is needed to establish species limits for Lampsilis in the Interior Highlands.</p>
Cascading effects of algal warming in a freshwater community
<p>1. Much of our research on the effects of ongoing climate warming on ecological communities is focused on how temperature affects resource quantity. However, resource quality is also affected by warming, and changes in resource quality can have meaningful effects on the productivity of higher trophic levels.</p> <p>2. Aquatic communities in particular are likely to affected by temperature-mediated shifts in resource quality because the nutritional value of algae is highly sensitive to temperature. For example, the production of healthful omega-3 polyunsaturated fatty acids (n-3 PUFA) by algae often decreases with warming.</p> <p>3. Documented decreases in algal PUFAs with warming have led to the hypothesis that global warming should lead to an overall decrease in productivity in aquatic communities. However, this hypothesis: a) potentially oversimplifies the relationship between algal PUFAs and temperature, and b) assumes that the nutritional requirements of consumers are not affected by temperature warming. Here we test these assumptions using a freshwater community (Scenedesmus algae, Daphnia zooplankton, Chaoborus insects).</p> <p>4. We found that total algal PUFAs per unit cell size increased, but cell size decreased with warming, resulting no net effect of warming on PUFA per algal cell. We also found a negative relationship between algal neutral lipids and temperature. Daphnia fed 12˚C-reared algae maintained higher population sizes than those fed 20˚C or 28˚C-reared algae, but the effect of algal food type diminished with increasing Daphnia rearing temperature. The indirect effects of cold-reared algae on the growth rate of Chaoborus predators were minor.</p> <p>5. These data highlight the importance of investigating the effects of temperature on both resource quality and on the nutritional needs of consumers. Our results suggest that at warmer temperatures, consumer nutritional requirements may be reduced. We caution against broad claims that the negative relationship between some algal PUFAs and temperature should result in overall declines in aquatic productivity with ongoing climate warming.</p>
FIGURE 15 in Late postnaupliar development of the freshwater copepods Lovenula falicifera and Metadiaptomus colonialis (Calanoida: Diaptomidae) from South Africa
FIGURE 15. Metadiaptomus colonialis (van Douwe, 1914). Male CoV: A, habitus, dorsal; B, urosome, dorsal; C, antennule 1st to 19th segment; D, antennule 20th to 25th segment; E, leg 5 (right leg arrowed). Scale bars: A, 100 µm; B, 50 µm; C, 50 µm; D, 50 µm; E, 50 µm.
FIGURE 8 in Late postnaupliar development of the freshwater copepods Lovenula falicifera and Metadiaptomus colonialis (Calanoida: Diaptomidae) from South Africa
FIGURE 8. Lovenula falcifera (Lovén, 1845). CoIII: A, habitus, dorsal; B, urosome, dorsal; C, antennule; D, antennule 25th segment. Scale bars: A, 100 µm; B, 50 µm; C, 50 µm; D, 10 µm.
FIGURE 5 in Late postnaupliar development of the freshwater copepods Lovenula falicifera and Metadiaptomus colonialis (Calanoida: Diaptomidae) from South Africa
FIGURE 5. Lovenula falcifera (Lovén, 1845). Female CoIV: A, leg 1; B, leg 2; C, leg 3; D, leg 4; E, leg 5. Scale bars: A, 50 µm; B, 50 µm; C, 50 µm; D, 50 µm; E, 50 µm.
FIGURE 4 in Late postnaupliar development of the freshwater copepods Lovenula falicifera and Metadiaptomus colonialis (Calanoida: Diaptomidae) from South Africa
FIGURE 4. Lovenula falcifera (Lovén, 1845). Female CoIV: A, habitus, dorsal view; B, urosome, ventral; C, fifth pedigerous somite right lobe; D, antennule; E, antennule 25th segment. Scale bars: A, 100 µm; B, 50 µm; C, 50 µm; D, 100 µm; E, 50 µm.
FIGURE 3 in Late postnaupliar development of the freshwater copepods Lovenula falicifera and Metadiaptomus colonialis (Calanoida: Diaptomidae) from South Africa
FIGURE 3. Lovenula falcifera (Lovén, 1845). Female CoV: A, leg 1; B, leg 3; C, leg 2; D, leg 4; E, leg 5; F, leg 5 exopod. Scale bars: A, 100 µm; B, 100 µm; C, 100 µm; D, 100 µm; E, 50 µm; F, 50 µm.
FIGURE 11 in Late postnaupliar development of the freshwater copepods Lovenula falicifera and Metadiaptomus colonialis (Calanoida: Diaptomidae) from South Africa
FIGURE 11. Metadiaptomus colonialis (van Douwe, 1914). Female CoV: A, antenna; B, mandible; C, maxillule; D, maxilla; E, maxilliped. Scale bars: A, 50 µm; B, 50 µm; C, 50 µm; D, 50 µm; E, 50 µm.
FIGURE 7 in Late postnaupliar development of the freshwater copepods Lovenula falicifera and Metadiaptomus colonialis (Calanoida: Diaptomidae) from South Africa
FIGURE 7. Lovenula falcifera (Lovén, 1845). Male CoIV: A, habitus, dorsal; B, antennule; C, antennule 17th to 20th segment; D, antennule 25th segment; E, leg 5 (right leg arrowed). Scale bars: A, 100 µm; B, 50 µm; C, 50 µm; D, 50 µm; E, 50 µm.
FIGURE 2 in Late postnaupliar development of the freshwater copepods Lovenula falicifera and Metadiaptomus colonialis (Calanoida: Diaptomidae) from South Africa
FIGURE 2. Lovenula falcifera (Lovén, 1845). Female CoV: A, antenna; B, antenna, endopod segments 2 and 3; C, mandible; D, maxillule; E, maxilla; F, maxilliped. Scale bars: A, 100 µm; B, 50 µm; C, 50 µm; D, 100 µm; E, 100 µm; F, 100 µm.
FIGURE 1 in Late postnaupliar development of the freshwater copepods Lovenula falicifera and Metadiaptomus colonialis (Calanoida: Diaptomidae) from South Africa
FIGURE 1. Lovenula falcifera (Lovén, 1845). Female CoV: A, habitus, dorsal view; B, urosome, dorsal view; C, fifth pedigerous somite right lobe; D, fifth pedigerous somite left lobe; E, antennule; F, antennule 25th segment. Scale bars: A, 100 µm; B, 100 µm; C, 50 µm; D, 50 µm; E, 100µm; F, 100 µm.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
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.