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67 results for “Bryconidae”
Fig. 3 in Genetic diversity and population structure of Brycon nattereri (Characiformes: Bryconidae): a Neotropical fish under threat of extinction
Fig. 3. Haplotype network based on partial sequencing of the D-loop region (mtDNA) of 92 individuals of Brycon nattereri from the Laranjinha River. Circle sizes are pro- portional to haplotype frequency.
FIGURE 2 in A new species of Auriculostoma (Trematoda: Allocreadiidae) from the intestine of Brycon guatemalensis (Characiformes: Bryconidae) from the Usumacinta River Basin, Mexico, based on morphology and 28 S rDNA sequences, with a key to species of the genus
FIGURE 2. Scanning electron micrographs of Auriculostoma lobata n. sp. (A) Anterior end with oral sucker bearing muscular lobe on either side, genital atrium and ventral sucker. (B) Pair of muscular lobes with a short posterior ‘‘ free’ ’ end, and 4 apical dome-like papillae (white arrows). (C) Lateral view of muscular lobe. (D) Distribution of dome-like papillae over oral sucker, 6 anterior (white arrows), 4 on the inner surface (white triangle), and 5 on the outer surface (white arrows).
Fig. 3 in Influence of a large dam and importance of an undammed tributary on the reproductive ecology of the threatened fish matrinxã Brycon orthotaenia Günther, 1864 (Characiformes: Bryconidae) in southeastern Brazil
Fig. 3. Histological sections of Brycon orthotaenia testis stained with Hematoxilin-eosin: (a) resting stage with seminiferous tubules cointaining only spermatogonia (S), (b)(c) maturing/mature with seminiferous tubules full of spermatozoa (Z) in acidophilic secretion (arrows) and (d) spent testis with few spermatozoa (Z) in the lumen (L) in acidophilic secretion (arrow). Bar = (a) 30 µm, (b), (d) 70 µm, (c) 80 µm.
Fig. 1 in Influence of a large dam and importance of an undammed tributary on the reproductive ecology of the threatened fish matrinxã Brycon orthotaenia Günther, 1864 (Characiformes: Bryconidae) in southeastern Brazil
Fig. 1. Location of the study sites of the upper rio São Francisco, downstream from the Três Marias Dam, Minas Gerais State (MG), Brazil. Site 1, immediately downstream from the Três Marias Dam and site 2, below the confluence with the rio Abaeté.
FIGURE 3 in Anthropogenic river fragmentation reduces long-term viability of the migratory fish Salminus brasiliensis (Characiformes: Bryconidae) populations
FIGURE 3 | A. Salminus brasiliensis population structure from the Bayesian cluster analysis for K = 2 (see also S1). Black lines separate the different sampled populations based on location (Pop1, Pop2, Pop3, Pop4 and Pop5; Fig. 1). B. DAPC scatterplots and membership probabilities show the first two principal components of the DAPC. Populations are represented in different colors: 1 - Lilac (Pop5); 2 - Green (Pop4), 3 - Orange (Pop3), 4 - Lilac (Pop2) and 5 - Brown (Pop1). C. Membership probabilities (in bar plots), represent individuals in different clusters.
FIGURE 2 in Anthropogenic river fragmentation reduces long-term viability of the migratory fish Salminus brasiliensis (Characiformes: Bryconidae) populations
FIGURE 2 | Predicted genetic diversity in Salminus brasiliensis populations with distinct fragmentation levels over the next 100 years. Using BOTTLESIM 2.6, we estimated the retained percentage of effective number of alleles (Ae) and expected heterozygosity (He) under 100%, 75% and 50% of retain bottleneck scenarios. In all populations, the current population size is unable to maintain 80% of current genetic diveristy, which it is indicated by a red line.
FIGURE 1 in Anthropogenic river fragmentation reduces long-term viability of the migratory fish Salminus brasiliensis (Characiformes: Bryconidae) populations
FIGURE 1 | Study area of Salminus brasiliensis populations in the Uruguay River basin, southern Brazil. A. Picture of Canyon Agusto César Gorge, Upper Uruguay River (acquired rights); B. Picture of Yucumã our Moconá Falls (google font: https://7mar.com.ar/mocona). Salminus brasiliensis (personal picture).
Fig. 6 in The brain of Brycon orbignyanus (Valenciennes, 1850) (Teleostei: Characiformes: Bryconidae): gross morphology and phylogenetic considerations
Fig. 6. Olfactory epithelium of representatives of Otophysi. a. Cyprinus carpio (Cypriniformes); b. Brycon orbignyanus (Characiformes); c. Pimelodus maculatus (Siluriformes) and; Sternopygus macrurus (Gymnotiformes). Scale bars = 1 mm.
Fig. 5 in The brain of Brycon orbignyanus (Valenciennes, 1850) (Teleostei: Characiformes: Bryconidae): gross morphology and phylogenetic considerations
Fig. 5. Brain of Gymnotus carapo (Gymnotiformes: Gymnotidae), LIRP 7767, 129.0 mm SL. a. dorsal; b. lateral and c. ventral views. Apt = Area postrema; Bol = bulbus olfactorius; Ch = chiasma opticum; Cocb = corpus cerebelli; Dien = diencephalon; Eg = eminentia granularis; ELL = electrosensory lateral line lobus; Hl = lateral nucleus of hypotalhamus; Hyp = hypophysis; LobX = lobus vagi; Mo = medulla oblongata; Ms = medulla spinalis; ndl = lateral portion of nucleus diffusus; nE = nucleus electrosensorius; Sv = saccus vasculosus; Tect = tectum opticum; Tv = tela ventriculi; Vcocb = valvula cerebellum. Cranial Nerves: nI = nervus olfactorius; nII = nervus opticus; nV = nervus trigeminus; nVI = nervus abducens; nVII = nervus fascialis; nVIII = nervus octavus; nlla = nervus lineae lateralis anterior; nllp = nervus lineae lateralis posterior; nIX = nervus glossopharyngeus; nX = nervus vagus.
Fig. 2 in The brain of Brycon orbignyanus (Valenciennes, 1850) (Teleostei: Characiformes: Bryconidae): gross morphology and phylogenetic considerations
Fig. 2. Brain of Brycon orbignyanus (Characiformes: Bryconidae), LIRP 6309, 175.5 mm SL. a. dorsal; b. lateral and c. ventral views. Apt = Area postrema; Bol = bulbus olfactorius; Ch = chiasma opticum; Cocb = corpus cerebelli; Dien = diencephalon; Eg = eminentia granularis; Hyp = hypophysis; Hyt = hypothalamus; Lih = lobus inferior hypothalami; LobX = lobus vagi; Mo = medulla oblongata; Ms = medulla spinalis; Pob = nervus tractus olfactorius; Sv = saccus vasculosus; Tect = tectum opticum;; Telen = Telencephalon Tl = Torus lateralis; Tv = tela ventriculi; Cranial Nerves: nI = nervus olfactorius; nII = nervus opticus; nIII = nervus oculomotorius; nIV = nervus trochlearis; nV = nervus trigeminus; nVI = nervus abducens; nVII = nervus fascialis; nVIII = nervus octavus; nLLa = nervus lineae lateralis anterior; nLLp = nervus lineae lateralis posterior; nIX = nervus glossopharyngeus; nX = nervus vagus and; nSo = nervus spino-occipitales.
Fig. 1 in The brain of Brycon orbignyanus (Valenciennes, 1850) (Teleostei: Characiformes: Bryconidae): gross morphology and phylogenetic considerations
Fig. 1. Brain of Brycon orbignyanus (Characiformes: Bryconidae), LIRP 6309, 175.5 mm SL. Main encephalic divisons (Telencephalon, Diencephalon, Mesencephalon, Rhombencephalon + Medulla oblongata and Medulla spinalis) in different colors. a. dorsal; b. lateral and c. ventral views.
Fig. 3 in The brain of Brycon orbignyanus (Valenciennes, 1850) (Teleostei: Characiformes: Bryconidae): gross morphology and phylogenetic considerations
Fig. 3. Brain of Cyprinus carpio (Cypriniformes: Cyprinidae), LIRP 8923, 72.3 mm SL. a. dorsal; b. lateral and c. ventral views. Apt = Area postrema; Bol = bulbus olfactorius; Ch = chiasma opticum; Cocb = corpus cerebelli; Dien = diencephalon; Eg = eminentia granularis; Hyp = hypophysis; Hyt = hypothalamus; Lih = lobus inferior hypothalami; LobVII = lobus facialis; LobX = lobus vagi; Mo = medulla oblongata; Ms = medulla spinalis; Pob = nervus tractus olfactorius; Tect = tectum opticum; Telen = Telencephalon; Tl = Torus lateralis; Tv = tela ventriculi. Cranial Nerves: nI = nervus olfactorius; nII = nervus opticus; nIII = nervus oculomotorius; nIV = nervus trochlearis; nV = nervus trigeminus; nVI = nervus abducens; nVII = nervus fascialis; nVIII = nervus octavus; nlla = nervus lineae lateralis anterior; nllp = nervus lineae lateralis posterior; nIX = nervus glossopharyngeus; nX = nervus vagus and; nSo = nervus spino-occipitales.
Fig. 4 in The brain of Brycon orbignyanus (Valenciennes, 1850) (Teleostei: Characiformes: Bryconidae): gross morphology and phylogenetic considerations
Fig. 4. Brain of Diplomystes mesembrinus (Siluriformes: Diplomystidae), LBP 449, 72.62 mm SL. a. dorsal; b. lateral and c. ventral views. Apt = Area postrema; Bol = bulbus olfactorius; Ch = chiasma opticum; Cocb = corpus cerebelli; Dien = diencephalon; Eg = eminentia granularis; Hyp = hypophysis; Hyt = hypothalamus; Lih = lobus inferior hypothalami; LobVII = lobus facialis; LobX = lobus vagi; Mo = medulla oblongata; Ms = medulla spinalis; Pob = nervus tractus olfactorius; Tect = tectum opticum; Telen = Telencephalon; Tl = Torus lateralis; Tv = tela ventriculi. Cranial Nerves: nI = nervus olfactorius; nII = nervus opticus; nIII = nervus oculomotorius; nIV = nervus trochlearis; nV = nervus trigeminus; nVI = nervus abducens; nVII = nervus fascialis; nVIII = nervus octavus; nlla = nervus lineae lateralis anterior; nllp = nervus lineae lateralis posterior; nIX = nervus glossopharyngeus; nX = nervus vagus and; nSo = nervus spino-occipitales.
FIGURE 7 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 7 | Correlation between total length and number of rays with hooks in males of Brycon orbignyanus. X axis: total length in cm. Y axis: number (n°) of anal fin rays that developed hooks.
FIGURE 4 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 4 | Anal fin of Brycon orbignyanus with hooks. b: base of the hook. fr: first ray. lr: last ray. s: hooks. sg: rays segment. sr: second ray. st: hook cusp. Scales: A and B. 1.0 cm; C and D. 200 µm; E. 100 µm.
FIGURE 5 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 5 | Phases of testes maturation in Brycon orbignyanus. A. Immature. B. Immature intersex. C. Regressing. D. Regenerating. E. Spawning Capable (primary male). F. Spawning Capable (secondary male). bv: blood vessels. cy: germ cell cysts. dge: discontinuous germinal epithelium. in: interstice. pg: primary growing oocyte. sg: spermatogonia. s: Sertoli cell. sz: sperm. tw: testis wall. va: vacuoles. Scales: A, C, D, E. 20 µm; B, F. 50 µm. Staining: Hematoxylin and Eosin.
FIGURE 3 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 3 | Anal fin of Brycon orbignyanus without hooks. ca: callosity. fb: first fork. fr: first ray. sg: rays segment. sr: second ray. tb: terminal bifurcation. Scales: A. 0.5 cm; B. 200 µm; C. 100 µm.
FIGURE 6 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 6 | Correlation between stages of the reproductive cycle and the number of rays with hooks in males of Brycon orbignyanus. X axis: Stages of the reproductive cycle, being, 0 – Immature specimens, 1 – Regressing, 2 – Regenerating specimens, 3 – Developing specimens, 4 – Spawning Capable specimens. Y axis: number (n°) of anal fin rays that developed hooks.
FIGURE 1 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 1 | Anal fins in Brycon orbignyanus. A. Specimen of B. orbignyanus. B. Anal fin regions. C. Rays (r). D. Anal fin rays. af: anal fin. bi: bifurcation of rays. ca: caudal region. cr: cranial region. fr: first ray. im: interradial membrane. me: medial region. sg: radius segment. Scales: A. 5 cm; B and D. 1 cm; C. 200 µm.
FIGURE 2 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 2 | Details regarding the fins of Brycon orbignyanus. A, C and E. Rays without hooks. B, D and F. Rays with hooks. b: base. fb: first fork. r: rays. rs: rays with hooks. s: hooks. sg: rays segment. st: hooks cusp. tb: terminal bifurcation. Scales: A and B. 1 cm; C and D. 200 µm; E. 100 µm; F. 50 µm.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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