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116 results for “fresh water”
Figure 3 in AfriBasins: a new framework in FishBase for the analysis of African fresh and brackish water fish distributions, with a discussion on the Congo basin fauna
Figure 3. – Total number and percentage of native and endemic species per family within the Congo Basin s.s. Families ordered by total number of species. "Other" includes the following families, all with no more than three species of which none are endemic: Dasyatidae, Hepsetidae, Protopteridae, Channidae, Mugilidae, Notopteridae, Syngnathidae, Ariidae, Carangidae, Cynoglossidae, Elopidae, Latidae, Megalopidae, Ophichthidae, Pantodontidae, Phractolaemidae, Pristidae and Pristigasteridae.
Data from: Feasting in fresh water: impacts of food concentration on freshwater tolerance and the evolution of food x salinity response during the expansion from saline into fresh water habitats
Saline to freshwater invasions have become increasingly common in recent years. A key hypothesis is that rates of freshwater invasions have been amplified in recent years by increased food concentration, yet this hypothesis has remained unexplored. We examined whether elevated food concentration could enhance freshwater tolerance, and whether this effect evolves following saline to freshwater invasions. We examined physiological response to salinity and food concentration in a 2 × 2 factorial design, using ancestral brackish and freshwater invading populations of the copepod Eurytemora affinis. We found that high food concentration significantly increases low-salinity tolerance. This effect was reduced in the freshwater population, indicating evolution following the freshwater invasion. Thus, ample food could enable freshwater invasions, allowing subsequent evolution of low-salinity tolerance even under food-poor conditions. We also compared effects of food concentration on freshwater survival between two brackish populations from the native range. Impacts of food concentration on freshwater survival differed between the brackish populations, suggesting variation in functional properties affecting their propensity to invade freshwater habitats. The key implication is that high food concentration could profoundly extend range expansions of brackishwater species into freshwater habitats, potentially allowing for condition-specific competition between saline invaders and resident freshwater species.
Data from: Bridging the Rubicon: phylogenetic analysis reveals repeated colonizations of marine and fresh waters by thalassiosiroid diatoms
Salinity imposes a significant barrier to he distribution of many organisms, including diatoms. Diatoms are ancestrally marine, and the number of times they have independently colonized fresh waters and the physiological adaptations that facilitated these transitions remain outstanding questions in diatom evolution. The colonization of fresh waters by diatoms has been compared to ''crossing the Rubicon,'' implying that successful colonization events are rare, irreversible, and lead to substantial species diversification. To test these hypotheses, we reconstructed the phylogeny of Thalassiosirales, a diatom lineage with high diversity in both marine and fresh waters. We collected ~5.3 kb of DNA sequence data from the nuclear (SSU and partial LSU rDNA) and chloroplast genomes (psbC and rbcL) and reconstructed the phylogeny using parsimony and Bayesian methods. Alternative topology tests strongly reject all previous colonization hypotheses, including monophyly of the predominantly freshwater Stephanodiscaceae. Results showed at least three independent colonizations of fresh waters, and whereas previous accounts of freshwater-to-marine transitions have been discounted, these results provide compelling evidence for as many as three independent re-colonizations of the marine habitat, two of which led to speciation events. This study adds valuable phylogenetic context to previous debate about the nature of the salinity barrier in diatoms and provides compelling evidence that, at least for Thalassiosirales, the salinity barrier might be less formidable than previously thought.
Fig. 15 in A systematic revision of the genus Juga from fresh waters of the Pacific Northwest, USA (Cerithioidea, Semisulcospiridae)
Fig. 15. Shell morphology of Juga canella sp. nov. A. Holotype, USNM 1413106. B–J. Sequenced vouchers. B. USNM 1295010. C. USNM 1295012. D. USNM 1295016. E. USNM 1413103. F. USNM 1413107. G. USNM 1413276. H. USNM 1413280. I. USNM 1413281. J. USNM 1413288. K. USNM 791508. L. CASIZ 223498. M. CASIZ 223572. N–O. CASIZ 30027. P. ANSP 346015. Q–R. UF 80824. S. USNM 63495. T. USNM 509469. U. UF 192876. Scale bar = 1 cm.
Fig. 14. Distribution maps. A in A systematic revision of the genus Juga from fresh waters of the Pacific Northwest, USA (Cerithioidea, Semisulcospiridae)
Fig. 14. Distribution maps. A. Juga caerulea sp. nov. B. Juga canella sp. nov. C. Juga douglasi sp. nov. Red stars, type localities; black dots, sequenced specimens; gray dots, unsequenced museum material. Abbreviations: CA = California; NV = Nevada; OR = Oregon; WA = Washington.
Fig. 3. Bayesian phylogram for 274 in A systematic revision of the genus Juga from fresh waters of the Pacific Northwest, USA (Cerithioidea, Semisulcospiridae)
Fig. 3. Bayesian phylogram for 274 individuals based on a concatenated COI, 16S and ITS1 dataset, with nonconserved regions of the ITS1 dataset removed. Terminals collapsed and outgroups trimmed for simplicity. Scale bar indicates number of nucleotide substitutions per site. Modified from Strong & Whelan (2019). Shells shown to same scale.
Fig. 1 in A systematic revision of the genus Juga from fresh waters of the Pacific Northwest, USA (Cerithioidea, Semisulcospiridae)
Fig. 1. Habitats of Juga H. Adams & A. Adams, 1854 in the Pacific Northwest. A. Springs and spring runs. Bitner Ranch, Nevada (J. acutifilosa (Stearns, 1890)). B. Spring runs. Phipps Meadow, Oregon (J. caerulea sp. nov.). C. Spring-fed creeks. Shoat Springs, Copco Rd, Oregon (J. canella sp. nov.). D. Creeks. Hat Creek, California (J. douglasi sp. nov.). E. Large rivers. Rogue River at Carpenter Island Park, Oregon (J. nigrina (I. Lea, 1856)). F. Lakes. Baum Lake, California (J. occata (Hinds, 1844)).
Fig. 20 in A systematic revision of the genus Juga from fresh waters of the Pacific Northwest, USA (Cerithioidea, Semisulcospiridae)
Fig. 20. Radular morphology of Juga newberryi (I. Lea, 1860) (USNM 1413317). A. View of the anterior radular ribbon. B. Detail of cutting edge of rachidian and lateral teeth. C. Detail of lateral teeth cusps. D. Detail of rachidian cusps. E. Inner and outer marginal teeth. F. Detail of inner and outer marginal teeth cusps. Scale bars: A = 200 µm; B, E = 100 µm; C, F = 50 µm; D = 30 µm.
Fig. 11 in A systematic revision of the genus Juga from fresh waters of the Pacific Northwest, USA (Cerithioidea, Semisulcospiridae)
Fig. 11. Radular morphology of Juga bulbosa (A. Gould, 1847) (USNM 1413186). A. View of the anterior radular ribbon. B. Detail of cutting edge of rachidian and lateral teeth. C. Detail of lateral teeth cusps. D. Detail of rachidian cusps. E. Inner and outer marginal teeth. F. Detail of inner and outer marginal teeth cusps. Scale bars: A = 200 µm; B–C = 100 µm; D–F = 50 µm.
Data from: Transcriptomic imprints of adaptation to fresh water: parallel evolution of osmoregulatory gene expression in the Alewife
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Data from: Bridging the Rubicon: phylogenetic analysis reveals repeated colonizations of marine and fresh waters by thalassiosiroid diatoms
Open the record for dataset details and reuse information.
Data from: Feasting in fresh water: impacts of food concentration on freshwater tolerance and the evolution of food x salinity response during the expansion from saline into fresh water habitats
Open the record for dataset details and reuse information.
Fig. 3. Toxotes oligolepis, 102 in Toxotes kimberleyensis, a New Species of Archerfish (Pisces: Toxotidae) from Fresh Waters of Western Australia
Fig. 3. Toxotes oligolepis, 102 mm SL, L. Speigler drawing from Bleeker (1875–1878).
Preformed aerenchyma determines the differential tolerance response under partial submergence imposed by fresh and saline water flooding in rice
GEO Series GSE124618. Oryza sativa. 12 samples. Type: Expression profiling by high throughput sequencing.
FIGURE 3 in Bratislavia dadayi (Michaelsen 1905) (Annelida, Clitellata, Naididae): discovery of an alien oligochaete in a technogenic fresh water body in Ukraine
FIGURE 3. Bratislavia dadayi (Michaelsen 1905) from the Ukrainian population. A. Typical dorsal bundles with single needle and hair chaetae (XXI–XXII segments). B. A dorsal bundle with two needles. C. Dorsal bundle with two needle and two hair (normal and short) chaetae. D. A bundle of anterior ventral chaetae (IV segment). E. Typical bundles of ventral chaetae in posterior body part (XXI–XXIII segments). F. Clitellum, general view. G. Surface of clitellum. H. A bundle of penial chaetae. I. Bundles of penial chaetae with pair of bifid ones. J. Tips of the bifid penial chaetae.
The effects of fresh oil sands process water, ages oil sands process water, and pure naphthenic acids on fathead minnow larval transcriptome.
GEO Series GSE85994. Pimephales promelas. 27 samples. Type: Expression profiling by array.
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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)
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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.