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61 results for “Crenicichla”
Fig. 5 in Two new species of the genus Crenicichla Heckel, 1840 from the upper rio Uruguay drainage (Perciformes: Cichlidae)
Fig. 5. Collecting localities of Crenicichla hadrostigma (triangles) and Crenicichla empheres (black dot).
Fig. 4 in Two new species of the genus Crenicichla Heckel, 1840 from the upper rio Uruguay drainage (Perciformes: Cichlidae)
Fig. 4. Rio Uruguay, on the road Barra do Guarita-Palmitinho, Barra do Guarita, Rio Grande do Sul. General view of the explored riffle stretch where were captured specimens of C. hadrostigma.
Fig. 1 in Two new species of the genus Crenicichla Heckel, 1840 from the upper rio Uruguay drainage (Perciformes: Cichlidae)
Fig. 1. Crenicichla hadrostigma, holotype, rio Chapecó, Coronel de Freitas, Santa Catarina, MCP 40959 (100.1 mm SL, male).
Fig. 2 in Two new species of the genus Crenicichla Heckel, 1840 from the upper rio Uruguay drainage (Perciformes: Cichlidae)
Fig. 2. Crenicichla hadrostigma, paratype, rio Chapecó, Coronel de Freitas, Santa Catarina, MCP 40079 (100.8 mm SL, female).
Fig. 3 in Two new species of the genus Crenicichla Heckel, 1840 from the upper rio Uruguay drainage (Perciformes: Cichlidae)
Fig. 3. Crenicichla hadrostigma, lower pharyngeal tooth plate in occlusal view, MCP 22036 (92.5 mm SL, female). Scale bar: 1mm.
Fig. 7 in Two new species of the genus Crenicichla Heckel, 1840 from the upper rio Uruguay drainage (Perciformes: Cichlidae)
Fig. 7. Crenicichla empheres, paratype, rio Chapecó, Abelardo Luz, Santa Catarina, MCP 40176 (124.3 mm SL, female).
Fig. 9 in Two new species of the genus Crenicichla Heckel, 1840 from the upper rio Uruguay drainage (Perciformes: Cichlidae)
Fig. 9. Rio Chapecó, at Abelardo Luz, Santa Catarina. The specimens of C. empheres were collected above the waterfalls.
Fig. 8 in Two new species of the genus Crenicichla Heckel, 1840 from the upper rio Uruguay drainage (Perciformes: Cichlidae)
Fig. 8. Crenicichla empheres, lower pharyngeal tooth plate in occlusal view, MCP 40176 (93.2 mm SL, female). Scale bar: 1mm.
Fig. 6 in Two new species of the genus Crenicichla Heckel, 1840 from the upper rio Uruguay drainage (Perciformes: Cichlidae)
Fig. 6. Crenicichla empheres, holotype, rio Chapecó, Abelardo Luz, Santa Catarina, MCP 40960 (104.4 mm SL, male).
Fig. 2 in Comparative feeding ecology and habitats use of Crenicichla species (Perciformes: Cichlidae) in a Venezuelan floodplain river
Fig. 2. Map showing location of the Cinaruco River, a tributary of the Orinoco River in Venezuela's Apure State; the study reach is outlined with a rectangle.
Fig. 4 in Comparative feeding ecology and habitats use of Crenicichla species (Perciformes: Cichlidae) in a Venezuelan floodplain river
Fig. 4. Number of immature and mature gonads encountered in C. lugubris (a) and C. aff. wallacii (b) of different size classes during the dry season. (black barra) Mature (gonad state> 3); (white barra) immature (gonad state 1-2). C. lugubris (n = 102), C. aff. wallacii (n = 108).
Fig. 8 in Description of two new species forming a sympatric species pair of Crenicichla (Teleostei: Cichlidae) endemic to the Piray Guazú River in the Paraná River Basin, Misiones, Argentina and belonging to the C. mandelburgeri species complex
Fig. 8. Overview of phylogenetic relationships and molecular and morphological differentiation of C. ama sp. nov. and C. aravera sp. nov. and its parallel species pair (C. ypo Casciotta, Almirón, Piálek, Gómez & Říčan, 2010 and C. yjhui Piálek, Casciotta, Almirón & Říčan, 2019). A. Summary of phylogenetic relationships within the C. mandelburgeri species complex with a nDNA ddRAD SVDQ species tree analysis as main topology focusing on the parallel species pairs in the Piray Guazú (the two new species) and Urugua-í River basins. Species tree is based on 60% SNP-representation matrix using fixed (= homozygotic sites). Red and blue basal branches and nodes in the species tree topology show biogeography (Red: Iguazú, Blue: Middle Paraná). Numbers in parentheses are total numbers of analyzed individuals (in nDNA/ in mtDNA). Numbers at nodes show bootstrap support values. Species colours as in Fig. 5. Blue arrows show nDNA introgression from C. mandelburgeri into C. aravera and C. yjhui. Modified from Říčan et al. (2021b). B. Alternative topology to the right of the tree represents mtDNA relationships of species in the two focal species pairs. Only C. ypo does not have a mitonuclear phylogenetic conflict. Modified from Říčan et al. (2021b). C. Inference of population structure based on the Admixture analysis for the two focal species pairs. Note majority assignment of C. yjhui and C. aravera with C. ypo and C. ama and partial assignment to C. mandelburgeri sensu lato at K10 to K13, and complete separation of all species at K14. Modified from Říčan et al. (2021b). D. Morphometric variation and discrimination of the two species pairs of sympatric species from the Piray Guazú (C. ama, C. aravera) and Urugua-í (C. ypo, C. yjhui) River basins analyzed by PCA based on holotype and paratype specimens ≥ 70 mm SL. Morphological measurements followed Kullander's (1986) methodology for Crenicichla Heckel, 1840 and were used as proportional values in % of SL. Note complete separation of species between ecomorphs (sympatric) and partial separation within ecomorphs (allopatric). Modified from Říčan et al. (2021b).
Fig. 7 in Description of two new species forming a sympatric species pair of Crenicichla (Teleostei: Cichlidae) endemic to the Piray Guazú River in the Paraná River Basin, Misiones, Argentina and belonging to the C. mandelburgeri species complex
Fig. 7. Paratype locality of C. ama sp. nov., tributary to upper arroyo Piray Guazú on RP16 23 km from San Pedro (26°35′45.90″ S, 54°16′59.96″ W), 26 November 2016. Crenicichla aravera sp. nov. is absent at this locality.
Fig. 4 in Description of two new species forming a sympatric species pair of Crenicichla (Teleostei: Cichlidae) endemic to the Piray Guazú River in the Paraná River Basin, Misiones, Argentina and belonging to the C. mandelburgeri species complex
Fig. 4. Lower pharyngeal tooth plate in occlusal view. A. Crenicichla ama sp. nov., paratype (MLP 11182, 94.5 mm). B. Crenicichla aravera sp. nov., paratype (MLP 11452, 93.7 mm). Scale bars = 1 mm.
Fig. 6 in Description of two new species forming a sympatric species pair of Crenicichla (Teleostei: Cichlidae) endemic to the Piray Guazú River in the Paraná River Basin, Misiones, Argentina and belonging to the C. mandelburgeri species complex
Fig. 6. Type locality of C. ama sp. nov. and C. aravera sp. nov., upper arroyo Piray Guazú on RP20 (26°26′34.1″ S, 54°08′29.4″ W), 18 February 2012.
Fig. 5. A in Description of two new species forming a sympatric species pair of Crenicichla (Teleostei: Cichlidae) endemic to the Piray Guazú River in the Paraná River Basin, Misiones, Argentina and belonging to the C. mandelburgeri species complex
Fig. 5. A.Topographic map of the Middle Paraná Basin. B. Satellite map of the Piray Guazú Basin showing distribution of the sympatric C. ama sp. nov. (dark green) and C. aravera sp. nov. (light green), and also of other species in the Iguazú (red) and the Middle Paraná (C. ypo Casciotta, Almirón, Piálek, Gómez & Říčan, 2010: dark orange; C. yjhui: orange; C. hu: yellow; C. mandelburgeri sensu lato: blue, C. gillmorlisi: grey; C. taikyra: pink). Large and small dots in the Piray Guazú Basin show localities where the species is common or rare, respectively. Dark blue and light blue dots show the northern and southern mtDNA clades of C. mandelburgeri, respectively. White bars show location of significant waterfalls. White dot (marked with X in B) shows an upstream locality in the Piray Guazú where both C. ama and C. aravera are absent. Locality 1 (in B, marked with a star) is the type locality of both new species. Localities 2 and 3 (in B) are paratype localities of the two new species. Inset in A shows the parallel species pairs in the Piray Guazú and Urugua-í basins.
Fig. 2 in Description of two new species forming a sympatric species pair of Crenicichla (Teleostei: Cichlidae) endemic to the Piray Guazú River in the Paraná River Basin, Misiones, Argentina and belonging to the C. mandelburgeri species complex
Fig. 2. Crenicichla ama sp. nov., live specimens. A–B. Male paratypes. C–E. Female paratypes. A. MLP 11448, tributary to upper arroyo Piray Guazú on RP16 23 km from San Pedro, 26°35′45.90″ S, 54°16′59.96″ W, November 26 2016. B. MLP 11182, 94.5 mm. C–D. MLP 11180. E. MLP 11448, tributary to upper arroyo Piray Guazú on RP16 23 km from San Pedro, 26°35′45.90″ S, 54°16′59.96″ W, November 26 2016).
Fig. 3 in Description of two new species forming a sympatric species pair of Crenicichla (Teleostei: Cichlidae) endemic to the Piray Guazú River in the Paraná River Basin, Misiones, Argentina and belonging to the C. mandelburgeri species complex
Fig. 3. Crenicichla aravera sp. nov., live specimens. A. Holotype, ♂ (MLP 11450). B. Paratype, ♂ subadult (MLP 11451, 81.2 mm). C–D. Female paratypes (MLP 11451, 83.3 mm; MLP 11452, 93.7 mm), upper arroyo Piray Guazú on RP20, February 18 2012.
Fig. 1. A in Description of two new species forming a sympatric species pair of Crenicichla (Teleostei: Cichlidae) endemic to the Piray Guazú River in the Paraná River Basin, Misiones, Argentina and belonging to the C. mandelburgeri species complex
Fig. 1. A. Crenicichla ama sp. nov., holotype, ♂ (MLP 11446, 105.8 mm). B. Crenicichla aravera sp. nov., holotype, ♂ (MLP 11450, 102.5 mm).
Figure 2. A in Life history traits of parental care in Crenicichla lepidota (Cichliformes, Geophagini) in the upper Paraguay River basin, Brazil
Figure 2. A couple of Crenicichla lepidota defence your offspring of a non-specific predators. (A) Both Crenicichla lepidota exhibit lateral threat display towards Serrasalmus maculatus; (B) Hyphessobrycon eques (indicated by arrow) approaches offspring(indicated by arrow bottom right) while parents are warding off another Crenicichla lepidota out of shot. (C) Male Crenicichla lepidota (indicated by arrow right) notices threat and charges Hyphessobrycon eques (indicated by arrow left). (D) Cichlasoma dimerus approaches offspring and adult of Crenicichla lepidota.
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