[PDF] Top 20 Neotrop. ichthyol. - vol.18 número4

... In this study, we compared chromosomal characteristics using conventional and molecular cytogenetic protocols in pirarucu populations from the Amazon and Tocantins-Araguaia [r] ... See full document

... From the 160 stomachs, one was empty, so we used 159 stomachs for further analysis. The species diet was composed of 18 items, ten allochthonous, seven autochthonous, and one of unknown origin (Tab. 1). The diet ... See full document

... Remarks. In a revisionary study for Callichthyidae, Ellis (1913) mentioned the presence of C. flaveolus Ihering, 1911 (described from the rio Tietê basin) in the río Paraguay basin, at Sapucay, Paraguay. In the ... See full document

... fecundity, sub-samples of mature ovaries (n = 10 from each section) were collected. Samples from the middle region of the ovaries were fixed in a modified Gilson solution (100 mL of 60% ethanol, 880 mL of distilled ... See full document

... A = Hemigrammus brevis, endemic species of São Francisco Ecoregion (SFRE); B = Moenkhausia costae and C = Psellogrammus kennedyi, shared species between SFRE and Mid- Northeastern Caati[r] ... See full document

... Results from geometric morphometrics and molecular analyses were consistent with the results of the traditional morphological analysis, also indicating the delimitation of six taxa bel[r] ... See full document

... This study aims to develop candidate microsatellite loci to accurately access genetic diversity and help in future studies of population genetics of electric eels.. Thus, this paper re[r] ... See full document

... LBP 1673 11258 GU701954.1 H. strigaticeps Rio Paranapanema, Andirá, PR, Brazil 22°56’35.4”S 50°15’13.8”W LBP 2861 18616 JN089808.1 N. bandeirante Rio Tietê, Salesópolis, SP, Brazil 23°31’37.2”S 45°45’43.8”W LBP 17393 ... See full document

... The hypothesis that the deterioration of water quality in extreme drought conditions causes oxidative stress was supported by our results, as shown by the increased lipid peroxidation [r] ... See full document

... Given the knowledge gap that exists on the deep-sea fish fauna of the northern coast of Brazil, we compiled all the available data on the region’s deep-sea fish, including the identifi[r] ... See full document

... Using a total-evidence phylogenetic approach, Mirande (2019) found the same clade composition and the same phylogenetic relationships: (((Paracheirodon, Brittanichthys), the “Petitella[r] ... See full document

... density, number of free neuromasts and taste organs, feeding posture, sleep duration, amount of yolk content, ability to store fat, degree of darkness-preference etc., between cave and surface fish have a quantitative ... See full document

... the Uruguay River, South Brazil. Our aims were to: i) estimate the number of breeding males and females in the population; ii) assess the most prevalent genetic mating system in both s[r] ... See full document

... While the 45S rDNA is located in a single chromosome pair in Ancistrus, the 5S rDNA can be present in a large number of chromosomal sites (ranging from 1 to 13 chromosome pairs) in the[r] ... See full document

... varii in the wild, based on analysis of stomach contents and intestine size, and its feeding dynamics based on stomach weight variation (stomach repletion index – RI), in addition to d[r] ... See full document

... operculatum by the maxillary barbel longer than half-length of the head (vs. smaller than half-length of the head); the tips of pectoral-fin rays not extending beyond the interadial me[r] ... See full document

... Oleic (18:1n-9) and linoleic (18:2n-6) fatty acids levels are higher in cultured than in wild fish, which could be reflecting the fatty acid content of the offered feeds, as observed in other fish species ... See full document

... Habitat use, trophic, and occurrence patterns of Inpaichthys kerri and Hyphessobrycon vilmae (Pisces: Characidae) in Amazonian streams.. Jaquelini O.[r] ... See full document

... Notable differences between Centromochlus heckelii and previous data about species of Tatia are: lower diploid number, presence of a sex chromosome system and multiple AgNORs in Centro[r] ... See full document

... Since sandy bottoms provide a higher contrast against leaf litter, one of the most common objects found underwater in igarapés, we suggest that natural selection stemming from predatio[r] ... See full document