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339 results for “southeast Brazil”
Fig. 3 in Microhabitat use by Phalloceros harpagos Lucinda (Cyprinodontiformes: Poeciliidae) from a coastal stream from Southeast Brazil
Fig. 3. Availablity (light grey bars), use (dark grey bars) and Ivlev Index (black circles) for the six studied microhabitat descriptors affecting juvenile individuals of Phalloceros harpagos populations from Mato Grosso stream: (a) distance from the nearest bank; (b) total depth; (c) mesohabitat; (d) focal water velocity; (e) substratum, and (f) vegetal cover density.
Fig. 4 in Fish assemblages in stream stretches occupied by cattail (Typhaceae, Angiospermae) stands in Southeast Brazil
Fig. 4. (a) Ordination resulting from Nonmetric Multidimensional Scaling Analysis (NMDS) with percent composition by number of feeding items from fishes of six stream stretches (S1-S6) in the dry and wet periods. (b, c, d) Contribution (the larger the circle, the greater the percent composition by number) of Ceratopogonidae larvae (b), Coleoptera larvae (c), and Collembola (d) to the fishes' diet. A stress of 0.08 corresponds to a good ordination with no real prospect of a misleading interpretation (Clarke & Warwick, 2001).
Fig. 2 in Fish assemblages in stream stretches occupied by cattail (Typhaceae, Angiospermae) stands in Southeast Brazil
Fig. 2. (a) Dendrogram showing species composition similarity among six stream stretches sampled in the dry and wet periods (Jaccard coefficient and UPGMA). (b) Dendrogram showing quantitative similarity among six sampled streams in the dry and wet periods (Bray-Curtis coefficient and UPGMA).
Fig. 3 in Fish assemblages in stream stretches occupied by cattail (Typhaceae, Angiospermae) stands in Southeast Brazil
Fig. 3. Representation the two first axis of the Canonical Correspondence Analysis, showing the sampled stretches (labelled S1-S6) in the dry and wet periods (circles), species (triangles), and environmental descriptors (arrows). The eigenvalue of axis 1 and axis 2 are 0.26 and 0.16, respectively, displaying 38% of the total inertia (= weighted variance) in the abundances and 68.8% of the variance in the weighted averages and class total of species with respect to the environmental variables. Monte Carlo significance test (4.999 permutations) under the full model option indicate that canonical axes are marginally significant ("F-ratio" = 1.509, P-value = 0.09). To species codes see Table 3.
Fig. 5 in Size composition, monthly condition factor and morphometrics for fishery-dependent samples of Rioraja agassizi (Chondrichthyes: Rajidae), off Santos, Southeast Brazil
Fig. 5. Relationships between total (black symbols) and gutted weight (g) (grey symbols) for male (above) and females (below) of Rioraja agassizi.
Fig. 2 in Size composition, monthly condition factor and morphometrics for fishery-dependent samples of Rioraja agassizi (Chondrichthyes: Rajidae), off Santos, Southeast Brazil
Fig. 2. Maps of Southeast Brazil, showing the fishing hauls by month, conducted by a total of eight fishing vessels. Symbols represent the fishing hauls from where samples of Rioraja agassizi were collected (dotted circles), or when this information was not available, the total hauls recorded by the skippers (crosses).
Fig. 6 in Size composition, monthly condition factor and morphometrics for fishery-dependent samples of Rioraja agassizi (Chondrichthyes: Rajidae), off Santos, Southeast Brazil
Fig. 6. Median condition factor by month (from March, 2005 to March, 2006) considering total (black line) and gutted weight (g) (grey line) for males (above) and females (below) of Rioraja agassizi. Vertical bars represent the data interval.
Fig. 4 in Size composition, monthly condition factor and morphometrics for fishery-dependent samples of Rioraja agassizi (Chondrichthyes: Rajidae), off Santos, Southeast Brazil
Fig. 4. Relationship of disc width (cm) as a dependent variable of total length (cm) for males (black symbols) and females (grey symbols) of Rioraja agassizi.
Fig. 1 in Size composition, monthly condition factor and morphometrics for fishery-dependent samples of Rioraja agassizi (Chondrichthyes: Rajidae), off Santos, Southeast Brazil
Fig. 1. Map of the study area, southeast Brazil, south-western Atlantic Ocean. Symbols represent all the fishing hauls from where samples of Rioraja agassizi were collected.
Fig. 2 in Reproductive activity and recruitment of the yellow-mandi Pimelodus maculatus (Teleostei: Pimelodidae) in the Igarapava Reservoir, Grande River, Southeast Brazil
Fig. 2. Histological sections of yellow-mandi ovaries at different stages of gonadal maturation; tissues were fixed in 5% buffered glutaraldehyde and then post-fixed in Bouin's fluid; bars = 100 µm. a) Resting stage: chromatin nucleolar (O1) and perinucleolar (O2) were the only types of oocytes present. b) Maturation stage: besides O1 and O2 oocytes, the ovary contained yolk vesicle oocytes (O3). c) Mature stage: at this stage the ovaries showed chromatin nucleolar (O1), perinucleolar (O2) and vitellogenic (O4) oocytes. d) Spawned stage: postovulatory follicle (POF) was a striking structure present in the ovaries at this stage; atresic oocyte (AO); chromatin nucleolar (O1) and perinucleolar (O2) oocytes were also observed.
Fig. 1 in Reproductive activity and recruitment of the yellow-mandi Pimelodus maculatus (Teleostei: Pimelodidae) in the Igarapava Reservoir, Grande River, Southeast Brazil
Fig. 1. Study area; location of Volta Grande, Igarapava and Jaguara reservoirs in the Grande River, Southeast Brazil.
Figures 29–31 in A new species of Megaspira (Stylommatophora: Megaspiridae) from Ilha Grande, Southeast Brazil
Figures 29–31. Megaspira adenticulata sp. nov.: detail of proximal, median and distal portions of pallial system. (A) Anus, (MB) Mantle border, (Ki) kidney, (MV) Mantle vessels, (Pe) Pericardium, (PV) Pulmonar vein, (Pn) Pneumostome, (R) Rectum, (Ur) Ureter). Scale bars: 20–24 = 1 mm.
Figures 5–12 in A new species of Megaspira (Stylommatophora: Megaspiridae) from Ilha Grande, Southeast Brazil
Figures 5–12. Shell of Megaspira species: (5, 6) lectotype of Megaspira pilsbryi (ANSP 25041) apertural and dorsal views of the shell: (7–9) lectotype of Megaspira iheringi (ANSP 100532) apertural, dorsal views of the shell and detail of inner collumelar lamellae; (10–12) lectotype of Megaspira elatior robusta (ANSP 71925) apertural, dorsal views of the shell and detail of inner collumelar lamellae. Scale bars: 5 mm.
Figures 19–28 in A new species of Megaspira (Stylommatophora: Megaspiridae) from Ilha Grande, Southeast Brazil
Figures 19–28. Megaspira adenticulata sp. nov.: (19–21) shell of young specimen in SEM showing the absence of apertural lamellae and detail of the microsculpture of the teleoconch: (22–24) detail of microsculptura of columela in SEM showing small papillae on the entire surface; (25) jaw; (26–28) detail of radula showing the rachidian, lateral and marginal tooth. Scale bars: 19, 20, 22 = 1 mm; 21, 24 = 200 µm; 24, 26, 28 = 20 µm; 25 = 100 µm; 27 = 10 µm.
Figures 13–18 in A new species of Megaspira (Stylommatophora: Megaspiridae) from Ilha Grande, Southeast Brazil
Figures 13–18. Living specimen of Megaspira adenticulata sp. nov. and shell morphology in different views: (13, 14) specimen showing the pigmentation of the cephalopedal mass; (15–18) apertural, dorsal and lateral views of the shell. Scale bars: 1 mm. Photos: Regiana Salgado de Mello.
Figures 2–4 in A new species of Megaspira (Stylommatophora: Megaspiridae) from Ilha Grande, Southeast Brazil
Figures 2–4. Shell measurements of Megaspira adenticulata sp. nov.: (2) linear measurements taken from specimens; (3) apical view showing the partial angle of the first two whorls that part of the protoconch; (4) angular measurements taken from specimens: maximum angle in red, spiral angle in blue, growth angle in green, columellar angle in pink, suture angle in orange. (h) Height, (sh) spire height, (ah) aperture height, (al) aperture width, (D) major diameter.
Figure 1 in A new species of Megaspira (Stylommatophora: Megaspiridae) from Ilha Grande, Southeast Brazil
Figure 1. Map of the Ilha Grande showing the site (the Jararaca trail in red circle) where the material of Megaspira adenticulata sp. nov. was collected.
Figures 32–35 in A new species of Megaspira (Stylommatophora: Megaspiridae) from Ilha Grande, Southeast Brazil
Figures 32–35. General view of reproductive system dissected out of Megaspira adenticulata sp. nov.: (32, 34) dorsal and ventral views of reproductive; (33) detail of ovotestis; (35) detail of distal portion of reproductive system showing the genital atrium and genital diverticle. (Ov) Ovoteste, (HD) Hermaphrodite Duct), (AG) Albumen gland, (BC) Bursa copulatrix, (BD) Bursa duct, (DV) Deferens vas, (Ep) epiphallus, (Ph) proximal phallum, (GA) Genital atrium, (Fl) Flagellum, (Ov) Ovotestis, (Pr) Prostate, (U: uterus), (BD) Bursa duct, (GD) Genital diverticle, (Ph) Proximal phallum, (GA) Genital atrium, (U) Ureter). Scale bars: 32–35 = 1 mm.
FIG. 2 in Two new species of Achnanthidium Kützing (Achnanthidiaceae) from the Quaternary sediments of the Colônia basin, Southeast Brazil
FIG. 2. — Achnanthidium ectorianum Marquardt & C.E.Wetzel, sp. nov. Population from the type locality. SEM: A-E, external views, raphe valve; F, internal view, raphe valve. Scale bars: A, 4 µm; B-F, 5 µm.
FIG. 7 in Two new species of Achnanthidium Kützing (Achnanthidiaceae) from the Quaternary sediments of the Colônia basin, Southeast Brazil
FIG. 7. — Achnanthidium craterianum Marquardt & C.E.Wetzel, sp. nov. Population from the type locality. SEM: A-D, internal views; A-C, raphe valve; B, detail of helictoglossa, apical striae, and areolae; C, detail of the central area and transapical striae; D, rapheless valve. Scale bars: 1 µm.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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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.