Results 31 to 40 of about 418 (159)

FIGURE 4 in A new species of Characidium Reinhardt (Ostariophysi: Characiformes: Crenuchidae) from coastal rivers in the extreme south of Bahia, Brazil

Zootaxa, 2015
FIGURE 4. Pseudotympanum of Characidium helmeri, MZUSP 112666, 24.9 mm SL, rio Ribeirão, tributary of rio Cahy Braço Norte, Bahia, Brazil.Published as part of Zanata, Angela M., Sarmento-Soares, Luisa M.
Zanata, Angela M., Martins-Pinheiro, Ronaldo F., Sarmento-Soares, Luisa M.   +2 more
core   +3 more sources

Sex differences in landmark-based spatial learning in the sailfin tetra Crenuchus spilurus (Characiformes: Crenuchidae)

Neotropical Ichthyology
Spatial navigation is a central component of fish ecology, influencing foraging, mate choice, and territorial defense, and may differ between sexes under distinct ecological pressures.
Kalebe S. Pinto, Jansen Zuanon, Tiago H. S. Pires   +2 more
doaj   +3 more sources

A new South American darter (Crenuchidae: Characidium) from rivers draining the Northeastern Mata Atlantica Freshwater Ecoregion, Brazil: morphological and molecular evidence. [PDF]

J Fish Biol
Abstract Characidium tupi, a new species from rivers draining the southern portion of the Northeastern Mata Atlantica Freshwater Ecoregion, is described. The new species can be distinguished from all congeners by its colour pattern, including 7–14 dark bars enlarged and more conspicuous on their ventralmost portion, resulting in a longitudinal series ...
Zanata AM, Oliveira-Silva L.
europepmc   +2 more sources

Morphological and Histometric Alterations in Gonadal and Neural Tissues of Native and Non-Native Fishes From the Lower Doce River Basin in Southeastern Brazil. [PDF]

Anat Histol Embryol
ABSTRACT The ichthyofauna of the lower Doce River basin has been exposed to multiple anthropogenic stressors. Among these, the collapse of the Fundão mining tailings dam in Mariana, Minas Gerais, Brazil, in 2015 resulted in massive fish mortality and widespread contamination of aquatic environments.
Marcon L, Souza KL, Travenzoli NM, Rosa GR, de Almeida Santos ML, Ferreira WR, Coelho PN, Dos Santos JAD, Henschel E.   +8 more
europepmc   +2 more sources

A new species of Characidium (Characiformes: Crenuchidae) from the Iguaçu National Park, Rio Iguaçu basin, Paraná, Brazil. [PDF]

J Fish Biol
Abstract A new species of Characidium is described from the Iguaçu National Park, Brazil. The new species can be diagnosed from the congeners by the absence of conspicuous vertical bars, blotches and spots along the sides of the body, the presence of a scaled isthmus and adipose fin, a series of scales below lateral line and the presence of a thin dark
Stabile BHM, Dos Reis RB, de Oliveira AV, da Graça WJ.   +3 more
europepmc   +2 more sources

Meiotic behavior and H3K4m distribution in B chromosomes of Characidium gomesi (Characiformes, Crenuchidae). [PDF]

Comp Cytogenet, 2016
Characidium gomesi Travasso, 1956 specimens from the Pardo River have up to four heterochromatic supernumerary chromosomes, derived from the sex chromosomes. To access the meiotic behavior and distribution of an active chromatin marker, males and females of Characidium gomesi with two or three B chromosomes were analyzed.
Serrano ÉA, Araya-Jaime C, Suárez-Villota EY, Oliveira C, Foresti F.   +4 more
europepmc   +6 more sources

Early Biogeography of Otophysi Points to the Neotropics as the Cradle of Characiphysan Fishes. [PDF]

Ecol Evol
Otophysan fishes represent 70% of living freshwater fishes with 12,000 species. Relationships among their four orders were explored through a dense taxonomic sampling including 529 complete mitochondrial genomes and 4 nuclear genes for 324 species.
Lenglin A, Hidalgo M, Miranda G, De la Sota A, Caminade P, Belkhir K, Otero O, Antoine PO, Garcia-Davila C, Hubert N.   +9 more
europepmc   +2 more sources

FIGURE 1 in A new species of Characidium (Characiformes: Crenuchidae) from the upper rio São Francisco basin, Minas Gerais, Brazil

Zootaxa, 2020
FIGURE 1. Characidium cacah: (a) holotype, MZUSP 125765, 36.5 mm SL; (b) paratype, UFBA 9056, 36.2 mm SL, in life; (c) paratype, ZUEC 17227, 36.0 mm SL; (d) paratype, ZUEC 17227, 25.6 mm SL; (e) paratype, CICMG 158, 25.3 mm SL; (f) paratype, MCNIP 4530 ...
Zanata, Angela M., Ribeiro, Thiago C., Araújo-Porto, Felipe A., Oliveira-Silva, Leonardo, Pessali, Tiago C.   +4 more
core   +4 more sources

Morphological and molecular evidence reveals a new species of Characidium from the Ucayali-Urubamba Piedmont, Peru, and novel molecular clades are proposed within the genus. [PDF]

J Fish Biol
Abstract A new species of Characidium is described from the Urubamba River basin, within the Ucayali‐Urubamba Piedmont ecoregion, Peru. The new species can be readily distinguished from all congeners, except Characidium cacah, Characidium chicoi, Characidium helmeri, Characidium mirim, Characidium nana, Characidium nupelia, Characidium sterbai ...
Oliveira-Silva L, Britzke R, Meza-Vargas V, Hidalgo MH, Faustino-Fuster D, Oliveira C, Zanata AM.   +6 more
europepmc   +2 more sources

Linking rivers, mixing faunas: How artificial connectivity between the Middle and Upper Paraná River basins shapes fish diversity in a tributary of the Itaipu Reservoir, Brazil. [PDF]

J Fish Biol
Abstract This work aimed to investigate the distribution and occurrence of fish species along the São Francisco Falso Braço Norte (SFFBN) River basin, a tributary of the Middle Paraná River basin now artificially connected to the Upper Paraná ecoregion, to evaluate how such connectivity may affect the biogeographic distribution and regional composition
Kampfert LEP, Maicrovicz JC, Blanco DR, Lange D, Pavanelli CS, Brandão H.   +5 more
europepmc   +2 more sources