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38 results for “Pseudoplatystoma”
Fig. 1 in Genetic identification of interspecific hybrid of Neotropical catfish species (Pseudoplatystoma corruscans vs. Pseudoplatystoma reticulatum) in rivers of Mato Grosso do Sul State, Brazil
Fig. 1. Map of collection sites of the biological material. Upper Paraná River basin: Dourados River (1 to 16), Brilhante River (17), and Ivinhema River (18 to 20). Paraguay River basin: Miranda River (21), Aquidauana River (22), Negro River (23), and Paraguay River (24).
Fig. 3 in Bile acids as potential pheromones in pintado catfish Pseudoplatystoma corruscans (Spix & Agassiz, 1829): eletrophysiological and behavioral studies
Fig. 3. Time spent in each compartment when Pseudoplatystoma corruscans were stimulated by taurocholic acid (TCA) and controls. TCA response was significantly different from distilled water (paired t test: 3.94, P = 0.0005) as indicated by an asterisk.
Fig. 1 in Bile acids as potential pheromones in pintado catfish Pseudoplatystoma corruscans (Spix & Agassiz, 1829): eletrophysiological and behavioral studies
Fig. 1. Electrolfactogram responses of pintado Pseudoplatystoma corruscans to five representative bile acids. Response magnitudes are normalized as percentages of response to 10-5 M L-serine (mean ± SEM). CA = Cholic acid, TCA = taurocholic acid, TCD = taurochenodeoxicholic acid, CD = chenodeoxycholic acid, DC = deoxycholic acid.
Fig. 4 in Bile acids as potential pheromones in pintado catfish Pseudoplatystoma corruscans (Spix & Agassiz, 1829): eletrophysiological and behavioral studies
Fig. 4. Number of movements of Pseudoplatystoma corruscans stimulated by taurocholic acid (TCA) and controls. Response to TCA was significantly higher than distilled water comparison for each behavior. Dunn's multiple comparisons test, P<0.05, as indicated by an asterisk. Top over the bars: type of movements in each stimuli.
Fig. 7 in Characterization of the early development of Pseudoplatystoma reticulatum Eigenmann & Eigenmann, 1889 (Siluriformes: Pimelodidae) from the Paraguay River Basin
Fig. 7. Growth coefficients of the head, trunk, and tail during the development of Pseudoplatystoma reticulatum. Larvae in preflexion (a), flexion (b), and postflexion (c) stages; and juvenile (d).
Fig. 4 in Characterization of the early development of Pseudoplatystoma reticulatum Eigenmann & Eigenmann, 1889 (Siluriformes: Pimelodidae) from the Paraguay River Basin
Fig. 4. Drawings and photographs of larvae at different stages and juvenile of Pseudoplatystoma reticulatum: (a) yolk-sac larva (newly-hatched): TL = 3.05 mm; (b) preflexion: age = 12 h, TL = 3.91 mm; (c) early flexion: age = 2 days, TL = 5.85mm; (d) intermediate flexion: age = 4 days, TL = 7.91mm; (e) late flexion: age = 6 days, TL = 8.22 mm; (f) early postflexion: age = 7 days, TL = 9.23 mm; (g) intermediate postflexion: age = 8 days, TL = 10.38 mm; (h) late postflexion: age = 10 days, TL = 9.55mm; and (i) juvenile: age = 21 days, TL = 36.42 mm. Scale = 1 mm.
Fig. 6 in Characterization of the early development of Pseudoplatystoma reticulatum Eigenmann & Eigenmann, 1889 (Siluriformes: Pimelodidae) from the Paraguay River Basin
Fig. 6. Allometric growth of the body parts in relation to the total length during the development of Pseudoplatystoma reticulatum.
Fig. 3 in Characterization of the early development of Pseudoplatystoma reticulatum Eigenmann & Eigenmann, 1889 (Siluriformes: Pimelodidae) from the Paraguay River Basin
Fig. 3. Drawings and photographs of the embryonic development of Pseudoplatystoma reticulatum. (a) morula, (b) gastrula; (c) initial embryo, (d) tail formation, (e) free tail, and (f) final embryo. Scale = 1 mm.
Fig. 1 in Characterization of the early development of Pseudoplatystoma reticulatum Eigenmann & Eigenmann, 1889 (Siluriformes: Pimelodidae) from the Paraguay River Basin
Fig. 1. Schematic diagram of the measurements taken: (a) eggs, (b) larvae, and (c) juveniles of Pseudoplatystoma reticulatum. EGD: total diameter, YSD: yolk-sac diameter, PS: perivitelline space, TL: total length, SL: standard length, SNL: snout length, ED: eye diameter, HL: head length, TRL: trunk length, TAL: tail length, HH: head height, BH: body height at the level of the pectoral fin, BHa: body height at the level of the anus, CPH: caudal peduncle height, PPD: pre pectoral-fin length, PPvD: pre pelvic-fin length, PDD: pre dorsal-fin length, and PAD: pre anal-fin length.
Fig. 5 in Characterization of the early development of Pseudoplatystoma reticulatum Eigenmann & Eigenmann, 1889 (Siluriformes: Pimelodidae) from the Paraguay River Basin
Fig. 5. Pseudoplatystoma reticulatum growth during larval and juvenile development, from hatching to the 24th day of life. Larval stages: A: yolk-sac larva, B = preflexion, C = flexion, and D = postflexion; and E = juvenile. (a) Relationship between total length and age, and (b) relationship between weight and age.
Fig. 2 in Characterization of the early development of Pseudoplatystoma reticulatum Eigenmann & Eigenmann, 1889 (Siluriformes: Pimelodidae) from the Paraguay River Basin
Fig. 2. Morphological events observed during the development of Pseudoplatystoma reticulatum, in the (a) embryonic, (b) larval and juvenile period. YOS: yolk-sac larva, PF: preflexion, FL: flexion, POF: postflexion, and J: juvenile.
FIGURE 6 in Age and growth of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) at the confluence of the Paraná and Paraguay rivers
FIGURE 6 | Back calculated total length from the pectoral spines readings (B-C TL) and back calculated mean total lengths at age (B-C mean TL) for Pseudoplatystoma corruscans females (A) and males (B), and the respective fitted growth models: Von Bertalanffy (VBF), Gompertz (GPZ) and logistic (LOG).
FIGURE 5 in Age and growth of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) at the confluence of the Paraná and Paraguay rivers
FIGURE 5 | Monthly averages of the percentage of marginal increase (MI%) in spines of Pseudoplatystoma corruscans, hours of day light (Hs.L.) and hydrometric levels of the Paraná River (HL) during the annual cycle.
FIGURE 2 in Age and growth of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) at the confluence of the Paraná and Paraguay rivers
FIGURE 2 | A. Detail of a spine of Pseudoplatystoma corruscans in upper and lower views and B. detail of the proximal portion of the spine. Lines indicate the cuts positions. C. View of spine cut showing the ventral radius of the dorso-ventral axis, where distances from the estimated center of the spine foramen to the edge (Rt) and to each growth ring (Rn) were measured.
FIGURE 4 in Age and growth of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) at the confluence of the Paraná and Paraguay rivers
FIGURE 4 | Distances from the center of the spine to the first ring (black diamonds) in individuals of Pseudoplatystoma corruscans with different numbers of growth rings and their respective mean values (squares). The horizontal line represents the general mean value.
FIGURE 3 in Age and growth of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) at the confluence of the Paraná and Paraguay rivers
FIGURE 3 | Total length (TL) frequency distribution of Pseudoplatystoma corruscans specimens discriminated by sexes.
FIGURE 2 in Population genetics of the endangered catfish Pseudoplatystoma magdaleniatum (Siluriformes: Pimelodidae) based on species-specific microsatellite loci
FIGURE 2 | Results of Structure (A, B) and Discriminant analysis of principal components (C) for Pseudoplatystoma magdaleniatum. A: K = 1; B: K = 2; M: Margento, PC: Punta Cartagena, PB: Puerto Berrío, SN: Samaná Norte.
FIGURE 6 in Age validation and contrasted growth performances of Pseudoplatystoma punctifer (Siluriformes: Pimelodidae) in two river systems of the Western Amazon
FIGURE 6 | Von Bertalanffy growth curves for Pseudoplatystoma punctifer females (pink triangles) and males (blue circles) in the A. AMU system and B. Putumayo River.
FIGURE 4 in Age validation and contrasted growth performances of Pseudoplatystoma punctifer (Siluriformes: Pimelodidae) in two river systems of the Western Amazon
FIGURE 4 | Mean and standard deviation (SD) of each growth ring radius in vertebrae of Pseudoplatystoma punctifer from the A. AMU system and B. Putumayo River.
FIGURE 5 in Age validation and contrasted growth performances of Pseudoplatystoma punctifer (Siluriformes: Pimelodidae) in two river systems of the Western Amazon
FIGURE 5 | Mean monthly relative marginal increment (RMI ± SD) of Pseudoplatystoma punctifer vertebrae in relation to the hydrological cycle in the A. AMU system and B. Putumayo River. The illustrated hydrological cycles represent the average monthly values from the period 2008–2010.
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