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77 results for “Tocantins River”
Fig. 2 in Integrative taxonomy reveals two new cryptic species of Hyphessobrycon Durbin, 1908 (Teleostei: Characidae) from the Maracaçumé and middle Tocantins River basins, Eastern Amazon region
Fig. 2. Hyphessobrycon frickei Guimarães, Brito, Bragança, Katz & Ottoni sp. nov. (CICCAA 02388), 17.7 mm SL; jaw suspensory. A. Premaxillary. B. Maxilla. C. Dentary. Scale bar: 1 mm
Fig. 8 in Integrative taxonomy reveals two new cryptic species of Hyphessobrycon Durbin, 1908 (Teleostei: Characidae) from the Maracaçumé and middle Tocantins River basins, Eastern Amazon region
Fig. 8. Topology of the ultrametric tree performed in BEAST ver. 1.8.4 including unique haplotypes summarizing the results of GMYC, bPTP and ABGD. Numbers above and below branches are posterior probability values. The star indicates the Hyphessobrycon copelandi clade.
Fig. 4 in Short-term changes in energy allocation by Hemiodontidae fish after the construction of a large reservoir (Lajeado Dam, Tocantins River)
Fig. 4. Variation in feeding activity (standard residuals, regression between LS x WS), visceral fat storage, body condition (standard residuals, regression between LS x TW) and reproductive effort (GSR) of Hemiodus unimaculatus, before (Pre-1 and 2) and after (Post-1 and 2) the construction of Lajeado Dam.
Fig. 3 in Short-term changes in energy allocation by Hemiodontidae fish after the construction of a large reservoir (Lajeado Dam, Tocantins River)
Fig. 3. Variation in feeding activity (standard residuals, regression between LS x WS), visceral fat storage, body condition (standard residuals, regression between LS x TW) and reproductive effort (GSR) of Hemiodus microlepis, before (Pre-1 and 2) and after (Post-1 and 2) the construction of Lajeado Dam.
Fig. 2 in Short-term changes in energy allocation by Hemiodontidae fish after the construction of a large reservoir (Lajeado Dam, Tocantins River)
Fig. 2. Variation in feeding activity (standard residuals, regression between LS x WS), visceral fat storage, body condition (standard residuals, regression between LS x TW) and reproductive effort (GSR) of Argonectes robertsi, before (Pre-1 and 2) and after (Post-1 and 2) the construction of Lajeado Dam.
Fig. 1 in Short-term changes in energy allocation by Hemiodontidae fish after the construction of a large reservoir (Lajeado Dam, Tocantins River)
Fig. 1. Relative abundance of A. robertsi, H. microlepis, and H. unimaculatus in Pre- and Post-impoundment periods, in sites distributed along the reservoir (combined within zones: Fluvial, Transition, and Lacustrine).
Fig. 1. Sample places location. Points number 1, 3, 7, 12, 14, 18 and 20 in Reproductive biology of Rhaphiodon vulpinus (Ostariophysi: Cynodontidae) in the Tocantins River Basin, Brazil
Fig. 1. Sample places location. Points number 1, 3, 7, 12, 14, 18 and 20 = Tocantins river; 2 = Sono river; 4 = Lajeadinho river; 5 = Santa Luzia river; 6 = Mangues river; 8 = Areias river; 9 = Crixás river; 10 = Capivara Lagoon; 11 = Manuel Alves river; 13 = São Valério river; 15 = Santa Tereza river; 16 = Dionízio Lagoon; 17 = Água Branca Lagoon; 19 = Paranã river and 21 = Bonita Lagoon.
Fig. 5 in Reproductive biology of Rhaphiodon vulpinus (Ostariophysi: Cynodontidae) in the Tocantins River Basin, Brazil
Fig. 5. Monthly Tocantins River water level (m) variation. Vertical bars = minimum and maximum values; point = mean values.
Fig. 2 in Reproductive biology of Rhaphiodon vulpinus (Ostariophysi: Cynodontidae) in the Tocantins River Basin, Brazil
Fig. 2. Distribution of males and females of Rhaphiodon vulpinus, by standard length class. Asterisks indicate significant differences in sex ratio.
Fig. 4 in Reproductive biology of Rhaphiodon vulpinus (Ostariophysi: Cynodontidae) in the Tocantins River Basin, Brazil
Fig. 4. Monthly variation of the frequency of gonadal maturity stages (a and b), mean gonadosomatic index (c and d), and index of reproductive activity (e and f) for females (a, c, e) and males (b, d, f) of Rhaphiodon vulpinus.
Fig. 3 in Reproductive biology of Rhaphiodon vulpinus (Ostariophysi: Cynodontidae) in the Tocantins River Basin, Brazil
Fig. 3. Sexual maturity curve for females (a) and males (b) of Rhaphiodon vulpinus.
FIGURE 6 in Long known, brand new, and possibly threatened: a new species of watersnake of the genus Helicops Wagler, 1828 (Serpentes; Xenodontinae) from the Tocantins- Araguaia River Basin, Brazil
FIGURE 6. Asulcate (left) and sulcate (right) faces of the fully everted and maximally expanded right hemipenis of the paratype of Helicops phantasma (MZUSP 19319), from the municipality of Carolina, state of Maranh"o, Brazil. Scale bar = 10 mm
FIGURE 7 in Long known, brand new, and possibly threatened: a new species of watersnake of the genus Helicops Wagler, 1828 (Serpentes; Xenodontinae) from the Tocantins- Araguaia River Basin, Brazil
FIGURE 7. Asulcate (right) and sulcate (left) faces of the fully everted and maximally expanded right hemipenis of Helicops leopardinus (UFMT-R 1504) from the municipality of Cuiabá, state Mato Grosso, Brazil (above), and Helicops danieli (AMNH 97461), from state of Bolivar, Colombia. Scale bars = 10 mm.
FIGURE 5 in Long known, brand new, and possibly threatened: a new species of watersnake of the genus Helicops Wagler, 1828 (Serpentes; Xenodontinae) from the Tocantins- Araguaia River Basin, Brazil
FIGURE 5. Localities of record of Helicops phantasma [black (type locality) and white triangles] and of the present sample of He. leopardinus (black circles). Crosses denote areas of hydroelectric dams already installed or projected to the future in the Tocantins-Araguaia Basin. Gray shading illustrates the main hydrographic basins of Central and Northern Brazil (1: Amazon Basin; 2: Tocantins-Araguaia Basin; 3: Atlantico Norte and Nordeste Basins; 4 S"o Francisco Basin; 5: Atlantico Leste Basin, and 6: Paraná Basin).
FIGURE 4 in Long known, brand new, and possibly threatened: a new species of watersnake of the genus Helicops Wagler, 1828 (Serpentes; Xenodontinae) from the Tocantins- Araguaia River Basin, Brazil
FIGURE 4. Dorsal, lateral, and ventral views of the head of the holotype of Helicops phantasma sp. nov. (UFMT-R 8290) from the region of the municipality of Barra do Garças, state of Mato Grosso, Brazil. Scale bar = 10 mm.
FIGURE 3 in Long known, brand new, and possibly threatened: a new species of watersnake of the genus Helicops Wagler, 1828 (Serpentes; Xenodontinae) from the Tocantins- Araguaia River Basin, Brazil
FIGURE 3. Dorsal and ventral views of the holotype of Helicops phantasma sp. nov. (UFMT-R 8290), from the region of the municipality of Barra do Garças, state of Mato Grosso, Brazil. Scale bar = 40 mm.
FIGURE 1 in Long known, brand new, and possibly threatened: a new species of watersnake of the genus Helicops Wagler, 1828 (Serpentes; Xenodontinae) from the Tocantins- Araguaia River Basin, Brazil
FIGURE 1. Illustrations of the syntypes of (A) Helicops leopardinus (Schlegel, 1837) [modified from Jan & Sordelli (1864: f. 2, pl. III)] and (B–C) He. leprieurii Duméril et al., 1854, a junior synonym [modified from Jan & Sordelli (1864: f. 2–3, pl. IV). In both cases, the dorsal pattern consists of rounded black spots.
FIGURE 2 in Long known, brand new, and possibly threatened: a new species of watersnake of the genus Helicops Wagler, 1828 (Serpentes; Xenodontinae) from the Tocantins- Araguaia River Basin, Brazil
FIGURE 2. Phylogenetic relationships of Hydropsini (one species of Hydrops, one species of Pseudoeryx, and 11 species of Helicops) based on a concatenated matrix of the 12S, 16S, BDNF, C-mos, and NT3 sequence data. Numbers at nodes indicate the values of Bayesian Credibility/Maximum Likelihood bootstrap. The bar represents the number of expected changes per site in the Bayesian Analysis. Terminal H1733 corresponds to the voucher MZUSP 19695. The name Helicops pictiventris is currently in the synonymy of He. infrataeniatus, but appears in the tree exactly as the pertinent sequences appear in the GenBank (see Zaher et al. 2009).
Cumulative impacts of land cover change and dams on the land-water interface of the Tocantins River
<p>This dataset accompanies the manuscript entitled "Cumulative impacts of land cover change and dams on the land-water interface of the Tocantins River". It contains shapefiles and geoTIFF files.</p>
Distribution. NE Brazil, from E Para State S of the Amazon River along the coast to EC Bahia State, and inland S into E Tocantins and N Minas Gerais states. in Dasyproctidae
Distribution. NE Brazil, from E Para State S of the Amazon River along the coast to EC Bahia State, and inland S into E Tocantins and N Minas Gerais states.
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