Figure 3 - uploaded by Paulo Andreas Buckup
Content may be subject to copyright.
Fish species collected in upper Piraí river drainage. A. Trichomycterus macrophthalmus, MNRJ 43760, 52.4 mm SL. B. Imparfinis minutus, MNRJ 43770, 83.4 mm SL. C. Trichomycterus mariamole, MNRJ 36525, 58.72 mm SL. D. Pimelodella lateristriga, MNRJ 43888, 39.7 mm SL. E. Trichomycterus nigroauratus, MNRJ 38003, 48.8 mm SL. F. Rhamdia quelen, MNRJ 43889, 98.6 mm SL. G. Scleromystax barbatus, MNRJ 46722, 66.1 mm SL, male. H. Scleromystax barbatus, MNRJ 46722, 57.62 mm SL, female.
Source publication
An annotated checklist of the ichthyofauna from the upper Piraí river drainage is provided. The Piraí river was a major right-bank tributary of the Paraíba do Sul river, but it has been artificially diverted to the coastal Guandu river system in southeastern Brazil to generate electric power and water for the metropolitan area of Rio de Janeiro. Ba...
Contexts in source publication
Context 1
... macrophthalmus is distinguished from T. mariamole and T. nigroauratus by the presence of 9 pairs of ribs and eye diameter 13.2% to 14.6% the size of head length (HL) (Barbosa and Costa 2012). Figure 3C Geographic distribution: Piraí river drainage and upper reaches of Alambari and Barreiro rivers, Paraíba do Sul river basin. ...
Context 2
... defined stripe along the whole flank) and fewer interopercular odontodes (2734 vs. 41-46). Figure 3E Geographic distribution: Upper Piraí and Barreiro river drainages in the Paraíba do Sul river basin. Diagnosis: Trichomycterus nigroauratus differs mor- phologically from T. mariamole and T. macrophthalmus by the presence of golden spots on the snout and body, and broad (wider than long) metapterygoid bone (Barbosa and Costa 2008). ...
Context 3
... nigroauratus presents ontogenetic variation of coloration, with juve- niles exhibiting a black stripe along the lateral midline, and adults presenting stripes with irregular borders and dark stains that can cover the entire body in a homoge- neous pattern ( Buckup et al. 2014). Figure 3G, H Geographic distribution: Coastal rivers from Santa Catarina to Rio de Janeiro state. ...
Citations
... Therefore, specimens that belong to the lineage of the Upper Tietê and coastal drainages were tentatively identified here as Imparfinis piperatus, until a more detailed study that brings additional data about internal morphology of I. piperatus is available. Within the lineage composed by samples herein identified as Imparfinis piperatus (Fig. 1b), our analysis evidenced three allopatric subclusters: first one composed by samples from the Upper Tietê river basin, and two other clusters composed of samples from the Atlantic coastal River basin (Paraíba do Sul and Ribeira do Iguape) that have been historically identified as I. minutus (Menezes et al., 2007;Ferreira et al., 2014;Brito & Buckup, 2019;Oyakawa & Menezes, 2011). Differently from the current taxonomy, samples from coastal drainages did not cluster with I. minutus (from São Francisco River basin), but with samples of Imparfinis piperatus from the Upper Tietê (Fig. 1b). ...
The Neotropical family Heptapteridae comprises 228 valid species widely distributed in South America. Imparfinis is one of the most diverse genera of this family, with 25 valid species widely distributed, inhabiting streams from Costa Rica to Argentina. Old descriptions coupled with lack of recent systematic studies of the species of Imparfinis from the Upper Paraná river basin have led to a taxonomic impediment and hindered the advancement of studies in other areas, such as ecology, cytogenetic, phylogenetic, and evolution. We conducted the first integrative study analyzing both molecular and morphological data of Imparfinis from the Upper Paraná River basin. Our analyses strongly support the existence of four independent evolutionary lineages in this river system, three of them are the nominal species I. mirini, I. schubarti, and I. piperatus, and a new species from Goiás state described herein.
... Therefore, specimens that belong to the lineage of the Upper Tietê and coastal drainages were tentatively identified here as Imparfinis piperatus, until a more detailed study that brings additional data about internal morphology of I. piperatus is available. Within the lineage composed by samples herein identified as Imparfinis piperatus (Fig. 1b), our analysis evidenced three allopatric subclusters: first one composed by samples from the Upper Tietê river basin, and two other clusters composed of samples from the Atlantic coastal River basin (Paraíba do Sul and Ribeira do Iguape) that have been historically identified as I. minutus (Menezes et al., 2007;Ferreira et al., 2014;Brito & Buckup, 2019;Oyakawa & Menezes, 2011). Differently from the current taxonomy, samples from coastal drainages did not cluster with I. minutus (from São Francisco River basin), but with samples of Imparfinis piperatus from the Upper Tietê (Fig. 1b). ...
The Neotropical family Heptapteridae comprises 228 valid species widely distributed in South America. Imparfinis is one of the most diverse genera of this family, with 25 valid species widely distributed, inhabiting streams from Costa Rica to Argentina. Old descriptions coupled with lack of recent systematic studies of the species of Imparfinis from the Upper Paraná river basin have led to a taxonomic impediment and hindered the advancement of studies in other areas, such as ecology, cytogenetic, phylogenetic, and evolution. We conducted the first integrative study analyzing both molecular and morphological data of Imparfinis from the Upper Paraná River basin. Our analyses strongly support the existence of four independent evolutionary lineages in this river system, three of them are the nominal species I. mirini, I. schubarti, and I. piperatus, and a new species from Goiás state described herein.
This study evaluated fish beta diversity in six headwater creeks located in the area affected by the largest ornamental aquaculture center implemented in the Minas Gerais State, southeastern Brazil. We sampled fish assemblages in 2017 and 2018 to investigate changes in assemblage structure (species richness and beta diversity), comparing these data with the historic species pool. We recorded 60 fish species, of which 16 were native and 44 non-native with 19 translocated, and 25 exotic. The exotics Poecilia reticulata, Xiphophorus maculatus, X. variatus, Danio rerio, and Misgurnus anguillicaudatus were the most widely distributed in the headwater creeks. The Contamination Index showed that most creeks had high proportional contamination by exotic species (above 60%). Beta diversity increased from historical to contemporary periods in all creeks due to the introduction and differential colonization pressure of several non-native translocated and exotic species, indicating biotic differentiation. Temperature and number of ponds were the main preditors of change in beta diversity in the headwater creeks during the contemporary period. In summary, we observed that invaders have induced substantial changes to fish communities under influence of environmental filters. Our results support the hipothesis that aquaculture is a main driver of fish non-native fish introduction and native biodiversity loss in the Neotropics.
