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1,017 results for “freshwater fish”
Figure 2 in The Importance Of Natura 2000 Sites And Their Management For The Conservation Of Freshwater Fish, Lamprey And Crayfish In Latvia
Figure 2. Occurrence of threatened freshwater fish, lamprey and crayfish species (n=15) in N2000 and outside N2000 at GC5, grouped by 0–10 %; 10–25 %; 25–50 %;>50 % with species numbers 0–1; 2–3; 4–7; 8–12.
Figure 1 in The Importance Of Natura 2000 Sites And Their Management For The Conservation Of Freshwater Fish, Lamprey And Crayfish In Latvia
Figure 1. Occurrence of freshwater fish, lamprey and crayfish species (n=46) within Natura 2000 outside N2000 at GC5, grouped by 0–10 %; 10–25 %; 25–50 %;>50 % with species numbers 0–4; 5–11; 12–23; 24–40.
Figure 3 in The Importance Of Natura 2000 Sites And Their Management For The Conservation Of Freshwater Fish, Lamprey And Crayfish In Latvia
Figure 3. Occurrence of migratory freshwater fish and lamprey species (n=5) in N2000 and outside N2000 at GC5 cells, grouped by 0–10 %; 10–25 %; 25–50 %;>50 % with species numbers 0; 1; 2; 3–5.
Figure 4 in The Importance Of Natura 2000 Sites And Their Management For The Conservation Of Freshwater Fish, Lamprey And Crayfish In Latvia
Figure 4. Occurrence of introduced freshwater fish, lamprey and crayfish species (n=6) in N2000 and outside N2000 at GC5 cells, grouped by 0–10 %; 10–25 %; 25–50 %;>50 % with species numbers 0; 1; 2–3; 4.
Figure 5 in A histopathological study on the freshwater fish species chub (Squalius cephalus) in the Karasu River, Turkey
Figure 5. Photomicrograph of normal liver of the fish from Site S. Central vein (*), hepatocyte (arrow head), and sinusoid (arrow).
Figure 4 in A histopathological study on the freshwater fish species chub (Squalius cephalus) in the Karasu River, Turkey
Figure 4. Photomicrograph of pathologically abnormal gills of the fish from Site A. A Lamellar disorganization (arrows), B Blood congestion in secondary lamellae and the lamellar vascular axis (asterisks), C Partial fusion of some lamellae (arrows), D Aneurysm in lamellar vascular axis (arrows).
Figure 3 in A histopathological study on the freshwater fish species chub (Squalius cephalus) in the Karasu River, Turkey
Figure 3. Photomicrograph of pathologically abnormal gills of the fish from Site A. A Hypertrophy of the lamellar epithelium (arrows); B High severity of filamentary epithelium, hyperplasia that induced complete lamellar fusion (arrows), and vasodilatation of the central venous (*); C Lifting of lamellar epithelium (arrows) and cartilage tissue (arrow heads); D Lamellae shortening (arrows).
Figure 7 in A histopathological study on the freshwater fish species chub (Squalius cephalus) in the Karasu River, Turkey
Figure 7. Photomicrograph of abnormal liver of the fish from Site A. A Congestion of central vein (*), B Blood congestion in hepatic parenchyma (asterisks), C Epithelial degeneration of central vein (arrows), D Hepatic tissue showing necrosis areas (asterisks) and hepatocytes with pyknotic nucleus (arrows), E Hepatic granuloma (black arrow) consisting of melanomacrophage aggregates (white arrows) with lightly pigmented cytoplasm.
Figure 2 in A histopathological study on the freshwater fish species chub (Squalius cephalus) in the Karasu River, Turkey
Figure 2. Photomicrograph of normal gills of the fish from Site S. Normal aspect of the gill, showing secondary lamella (1), primary lamella (2), filament (F).
Figure 6 in A histopathological study on the freshwater fish species chub (Squalius cephalus) in the Karasu River, Turkey
Figure 6. Photomicrograph of abnormal liver of the fish from Site A. A Proliferation of the hepatopancreas (arrow); B Nonhomogeneous parenchyma tissue (colored dark and light hepatocytes); C Increasing melanomacrophage aggregates (arrows); D Sinusoidal dilatation (arrow head), hepatocyte hypertrophy (arrows), and necrosis (circle).
Differential reproductive plasticity under thermal variability in a freshwater fish (Danio rerio)
<p>Human-driven increases in global mean temperatures are associated with concomitant increases in thermal variability. Yet, few studies have explored the impacts of thermal variability on fitness-related traits, limiting our ability to predict how organisms will respond to dynamic thermal changes. Among the myriad organismal responses to thermal variability, one of the most proximate to fitness – and, thus, a population's ability to persist - is reproduction. Here, we examine how a model freshwater fish (Danio rerio) responds to diel thermal fluctuations that span the species' viable developmental range of temperatures. We specifically investigate reproductive performance metrics including spawning success, fecundity, egg provisioning, and sperm concentration. Notably, we apply thermal variability treatments during two ontogenetic timepoints to disentangle the relative effects of developmental plasticity and reversible acclimation. We found evidence of direct, negative effects of thermal variability during later ontogenetic stages on reproductive performance metrics. We also found complex interactive effects of early and late-life exposure to thermal variability, with evidence of beneficial acclimation of spawning success and modification of the relationship between fecundity and egg provisioning. Our findings illuminate the plastic life-history modifications that fish may undergo as their thermal environments become increasingly variable.</p>
Fig. 4 in Redescription of Argulus mongolianus (Crustacea: Branchiura: Argulidae), an Ectoparasite of Freshwater Fishes in East Asia, with Its First Record from Japan
Fig. 4. Argulus mongolianus, adult male, NSMT-Cr 29372, from Micropterus salmoides in Lake Izunuma, Miyagi Prefecture, Japan. A, Habitus, dorsal view; B, habitus, ventral view; C, respiratory areas, ventral view; D, caudal rami, dorsal view; E, first antenna (a1), second antenna (a2), and postantennal spine (pas), ventral view; F, distal part of first antenna, ventral view; G, distal part of second antenna, ventral view; H, preoral sheath and stylet, ventral view; I, mouth tube, ventral view; J, mandible, ventral view; K, section of sucker membrane of first maxilla showing three supporting rods and maginal projections, ventral view; L, second maxilla and denticles on first, second, and third segments, ventral view. Scale bars: A, B, 1 mm; C, 0.5 mm; D, F, G, K, 0.05 mm; E, H, I, 0.1 mm; L, 0.3 mm; I, 0.03 mm.
Fig. 2 in Redescription of Argulus mongolianus (Crustacea: Branchiura: Argulidae), an Ectoparasite of Freshwater Fishes in East Asia, with Its First Record from Japan
Fig. 2. Argulus mongolianus, adult female (different specimen shown in Fig. 1), NSMT-Cr 29371, from Micropterus salmoides in Lake Izunuma, Miyagi Prefecture, Japan. A, Thorax partially covered with carapace, anterior portion of abdomen, and sympods of fourth pair of legs, dorsal view; B, respiratory areas, ventral view; C, caudal rami, dorsal view; D, first antenna (a1), second antenna (a2), and postantennal spine (pas), ventral view; E, distal part of first antenna, ventral view; F, distal part of second antenna, ventral view; G, preoral sheath and stylet, ventral view; H, mouth tube, ventral view; I, mandible, ventral view; J, part of sucker membrane of first maxilla, ventral view; K, four supporting rods and maginal projections, ventral view; L, second maxilla and denticles on first, second, and third segments, ventral view. Scale bars: A, B, 1 mm; C, G, H, 0.1 mm; D, H, J, L, 0.2 mm; E, F, K, 0.05 mm; I, 0.02 mm.
Fig. 1 in Redescription of Argulus mongolianus (Crustacea: Branchiura: Argulidae), an Ectoparasite of Freshwater Fishes in East Asia, with Its First Record from Japan
Fig. 1. Argulus mongolianus, adult female, NSMT-Cr 29369, from Micropterus salmoides in Lake Izunuma, Miyagi Prefecture, Japan. A, Habitus, dorsal view; B, habitus, ventral view. Scale bar: 2 mm.
Fig. 6 in Redescription of Argulus mongolianus (Crustacea: Branchiura: Argulidae), an Ectoparasite of Freshwater Fishes in East Asia, with Its First Record from Japan
Fig. 6. Argulus mongolianus, adult female (A and B), NSMT-Cr 29369, and adult male (C and D), NSMT-Cr 29370, from Micropterus salmoides in Lake Izunuma, Miyagi Prefecture, Japan. Ethanol-preserved specimens. A, C, Habitus, dorsal view; B, D, habitus, ventral view. The adult female and male were both collected on 2 June 2020 and photographed on 2 October 2021. Scale bars: A, 2 mm; B, 1 mm.
Fig. 3 in Redescription of Argulus mongolianus (Crustacea: Branchiura: Argulidae), an Ectoparasite of Freshwater Fishes in East Asia, with Its First Record from Japan
Fig. 3. Argulus mongolianus, adult female (different specimen shown in Fig. 1), NSMT-Cr 29371, from Micropterus salmoides in Lake Izunuma, Miyagi Prefecture, Japan. A, First leg, ventral view; B, distal part of endopod of first leg, ventral view; C, second leg, ventral view; D, third leg, ventral view; E, fourth leg, ventral view; F. natatory lobe, ventral view. Scale bars: A, C–E, 0.5 mm; B, F, 0.1 mm.
Fig. 5 in Redescription of Argulus mongolianus (Crustacea: Branchiura: Argulidae), an Ectoparasite of Freshwater Fishes in East Asia, with Its First Record from Japan
Fig. 5. Argulus mongolianus, adult male, NSMT-Cr 29372, from Micropterus salmoides in Lake Izunuma, Miyagi Prefecture, Japan. A, First leg, ventral view; B, distal part of endopod of first leg, ventral view; C, second leg, ventral view; D, third leg, ventral view; E, fourth leg, ventral view. Scale bars: A, C–E, 0.5 mm; B, 0.1 mm.
Supplementary data for "ENGINEERED ADAPTATION MECHANISMS BETWEEN MARINE AND FRESHWATER ENVIRONMENTS IN FISH AFTER THE FLOOD" for the ICC 2023 in Cedarville, Ohio
<p>Supplementary data for "ENGINEERED ADAPTATION MECHANISMS BETWEEN MARINE AND FRESHWATER ENVIRONMENTS IN FISH AFTER THE FLOOD" for the ICC 2023 in Cedarville, Ohio.</p> <p>These include FishBase annotation, mtDNA sequence similarity matrixes, clustering, and statistics for nine fish orders:</p> <p>1. Acipenseriformes</p> <p>2. Angulliformes</p> <p>3. Beloniformes</p> <p>4. Characiformes</p> <p>5. Clupeiformes</p> <p>6. Cyprinodontiformes</p> <p>7. Elasmobranchii</p> <p>8. Pleuronectiformes</p> <p>9. Salmoniformes</p>
FIGURE 3 in Freshwater fish richness baseline from the São Francisco Interbasin Water Transfer Project in the Brazilian Semiarid
FIGURE 3 | Freshwater fish species from the São Francisco Interbasin Water Transfer Project basins in the Brazilian semiarid. A = Hemigrammus brevis, endemic species of São Francisco Ecoregion (SFRE); B = Moenkhausia costae and C = Psellogrammus kennedyi, shared species between SFRE and Mid-Northeastern Caatinga Ecoregion (MNCE); D = Aspidoras menezesi, endemic species of Jaguaribe basin (JAG); E = Hypostomus sertanejo, endemic species of MNCE; F = Parotocinclus spilurus, endemic and endangered species of JAG; G = Tatia bockmanni, endemic species of SFRE; H = Cichlasoma orientale, shared species from all basins of SFR-IWT; I = Geophagus brasiliensis, shared species between SFRE and MNCE; J = Colossoma macropomum, non-native species shared between SFRE and Piranhas-Açu basin; K = Parachromis managuensis, non-native species shared between SFRE and Paraíba do Norte basin; L = Xiphophorus helleri, non-native species of JAG.
FIGURE 2 in Freshwater fish richness baseline from the São Francisco Interbasin Water Transfer Project in the Brazilian Semiarid
FIGURE 2 | Sampling sites in the São Francisco Interbasin Water Transfer Project basins in the Brazilian semiarid. A = Canals under construction near the rio São Francisco main channel, and B = near Sertânia, Pernambuco State (PE), C = Rio Pajeú, tributary of the São Francisco basin, PE, D = Rio São Francisco near Petrolina, PE, E = Temporary pool in rio Jaguaribe basin in Russas, Ceará State (CE), F = Rio Jaguaribe in Crato, CE, G = Rio Apodi-Mossoró in Pau dos Ferros, Rio Grande do Norte State (RN), H = Rio Apodi-Mossoró in Pau dos Ferros, RN, I = Rio Seridó, tributary of the Piranhas-Açu basin in Caicó, RN, J = Rio Piranhas-Açu, Jardim de Piranhas, RN, K = Rio Paraíba do Norte in Barra de Santana, Paraíba State (PB), L = Rio Paraíba do Norte in São João do Cariri, PB.
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.