Figure 4 - uploaded by Paulo Andreas Buckup
Content may be subject to copyright.
Fish species collected in upper Piraí river drainage. A. Harttia carvalhoi, MNRJ 43816, 78.1 mm SL. B. Harttia loricariformis, MNRJ 43773, 42.1 mm SL. C. Hemipsilichthys gobio, MNRJ 43868, 75.3 mm SL (Adult individual collected in the rio do Braço, 22° 47' 09"S 44° 10' 44"W, a tributary of the Piraí river. The exemplar of H. gobio, MNRJ 36482, collected in this study is a small juvenile.). D. Hemipsilichthys papillatus, MNRJ 46657, 53.7 mm SL. E. Hypostomus affinis, MNRJ 43824, 62.6 mm SL. F. Hypostomus luetkeni, MNRJ 47007, 112.8 mm SL. G. Neoplecostomus microps, MNRJ 43808, 87 mm SL. H. Pareiorhina rudolphi, MNRJ 46835, 65.9 mm SL. I. Rineloricaria sp. cf. R. lima, MNRJ 43826, 76.3 mm SL.
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
... carvalhoi Miranda Ribeiro, 1939 Figure 4A Geographic distribution: Paraíba do Sul river basin. Diagnosis: The 2 species of Harttia that occur in the area of study can be distinguished by the distribution of plates in front of the anus: Harttia carvalhoi is distin- guished from H. loricariiformis by the absence of pre- anal plates ( Langeani et al. 2001). ...
Context 2
... The 2 species of Harttia that occur in the area of study can be distinguished by the distribution of plates in front of the anus: Harttia carvalhoi is distin- guished from H. loricariiformis by the absence of pre- anal plates ( Langeani et al. 2001). Figure 4B Geographic distribution: Paraíba do Sul river basin and coastal rivers from Rio de Janeiro to Espírito Santo. ...
Context 3
... Reis et al. 2006). Figure 4D Geographic distribution: Paraíba do Sul river basin. Diagnosis: Hemipsilichthys papillatus differs from H. gobio by not having plates in the dorsal midline between the base of the dorsal fin and the adipose fin, and a smaller orbital diameter (8.6-11.8% ...
Context 4
... luetkeni (Steindachner, 1877b) Figure 4F Geographic distribution: Paraíba do Sul river basin. Diagnosis: Hypostomus luetkeni can be distinguished from H. affinis by the presence of 2 or 3 plates in the main post-supraoccipital series and the absence of ridges on the flanks of the body ( Mazzoni et al. 1994). ...
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.
