Checklist of the ichthyofauna of the Rio Negro basin in the Brazilian Amazon

This study presents an extensive review of published and unpublished occurrence records of fish species in the Rio Negro drainage system within the Brazilian territory. The data was gathered from two main sources: 1) litterature compilations of species occurrence records, including original descriptions and revisionary studies; and 2) specimens verification at the INPA fish collection. The results reveal a rich and diversified ichthyofauna, with 1,165 species distributed in 17 orders (+ two incertae sedis), 56 families, and 389 genera. A large portion of the fish fauna (54.3% of the species) is composed of small-sized fishes < 10 cm in standard length. The main groups are Characiformes (454 species; 39.0%), Siluriformes (416; 35.7%), Gymnotiformes (105; 9.0%), and Cichliformes (102; 8.8%). The species composition differs between the main aquatic environments, such as: main channel (159 species), lakes (296), tributary rivers (596), small streams (234), seasonal beaches (186), and rapids (41). Part of the ichthyofauna is shared with adjacent basins, such as the Orinoco, rivers of the Guiana Shield, lower Solimões/Amazonas and upper Amazonas, which contributes to the remarkable ichthyofaunal diversity of the basin. A high rate of species endemism was observed in Characidae (24), Loricariidae (18), Cichlidae (18) and Callichthyidae (18), totalling 156 species (13.4%) endemic to the basin. An estimation of the species richness for the Rio Negro basin, considering 23 published references, resulted in 1,466 and 1,759 species (Jackknife 1 and 2, respectively), which seems reasonable when considering the large number of morphotypes left out of the present list and the low sampling effort in many areas of the basin. The results presented herein provide an additional tool for environmental managers and decision makers for conservation purposes of one of the richest and most well-preserved sub-basins of the Rio Amazonas system.

Download Full-text

Fish fauna of small-order streams of savannah and forest fragments landscape in the lower Tapajós River basin, Amazonia

Biota Neotropica ◽

10.1590/1676-0611-bn-2020-1179 ◽

2021 ◽

Vol 21 (4) ◽

Author(s):

Raul de Paula da Silva Fróis ◽

Bruno Oliveira Ribeiro ◽

Jansen Zuanon ◽

Amanda Frederico Mortati

Keyword(s):

Fish Fauna ◽

Total Sample ◽

Abundant Species ◽

Sampling Effort ◽

Forest Fragments ◽

Small Streams ◽

Capture Method ◽

Dry Seasons ◽

Fauna Composition ◽

Amazonian Brazil

Abstract: To better understand the fish fauna of Amazonian streams, we assessed small streams in a landscape of forest fragments and savannah in the region of the lower Tapajós River, Brazil. We sampled the fish fauna using a well-tested active capture method during two dry seasons (October 2006 and 2018) and one rainy season (March to May 2018). Species richness was calculated using an abundance matrix and first-order jackknife estimator. Using qualitative and quantitative data, we present a cluster analysis in which each stream corresponds to a sampling unit. We collected 6,094 individuals of 43 species distributed in six orders. The sampling effort represents 73% of the estimated richness (58.69 ± 7.65). The most abundant species were Copella nattereri, Iguanodectes variatus and Laimosemion dibaphus that together represent almost half of the total sample (48.7%). The most frequent species were Aequidens epae, Helogenes marmoratus and Laimosemion dibaphus, which were collected in 11 of the 13 sampled streams. This is the first fish fauna list for small-order streams of savannah and forest fragments landscape in Amazonian Brazil. The richness of fish and the presence of many rare species underscore the contribution of small streams to the regional fish fauna composition, even in dynamic and spatially restricted landscapes.

Download Full-text

The First Botanical Exploration to the Upper Cuiarí (Cuyarí) and Isana Rivers, Upper Río Negro Basin, Guainía Department, Colombia

Harvard Papers in Botany ◽

10.3100/hpib.v24iss2.2019.n3 ◽

2019 ◽

Vol 24 (2) ◽

pp. 83

Author(s):

Henry Arellano-P. ◽

Germán Bernal-Gutiérrez ◽

Albeiro Calero-Cayopare ◽

Francisco Castro-L. ◽

Adela Lozano ◽

...

Keyword(s):

Botanical Exploration ◽

Rio Negro ◽

Rio Negro Basin

Download Full-text

Effects of charging on the chromophores of dissolved organic matter from the Rio Negro basin

Water Research ◽

10.1016/j.watres.2014.03.044 ◽

2014 ◽

Vol 59 ◽

pp. 154-164 ◽

Cited By ~ 27

Author(s):

Mingquan Yan ◽

Gregory V. Korshin ◽

Francis Claret ◽

Jean-Philippe Croué ◽

Massimiliano Fabbricino ◽

...

Keyword(s):

Organic Matter ◽

Dissolved Organic Matter ◽

Rio Negro ◽

Rio Negro Basin

Download Full-text

Cartilaginous fishes (Class Chondrichthyes) from the Ichthyological Collection at the Federal University of Paraíba, Brazil

Revista Nordestina de Biologia ◽

10.22478/ufpb.2236-1480.2019v27n1.46558 ◽

2020 ◽

Vol 27 (1) ◽

Author(s):

Sarah TFL Viana ◽

Danilo Lima ◽

Katherine Viana ◽

Antônio Felinto ◽

Ricardo de Souza Rosa

Keyword(s):

Fish Fauna ◽

Public Consultation ◽

Type Collection ◽

Neotropical Fish ◽

Full List ◽

Bony Fishes ◽

Fish Collection ◽

Cartilaginous Fishes ◽

Geographical Scope ◽

Amazonian Region

Federal University of Paraíba (UFPB) ichthyological collection comprises over 11,000 lots of species of cartilaginous and bony fishes from marine, estuarine and freshwater realms. Due to the collection size, rarity of some specimens, taxonomic and geographical scope, this collection represents a substantial archive of the Neotropical fish fauna, especially concerning the Northeast Brazilian region. Currently, UFPB fish collection is under bioinformatization and curatorial transitions. Hence, the present study aimed to provide a detailed analysis of the Chondrichthyan collection database in which the systematic, spatial and chronological coverages are discussed. Full list of collection objects, updated nomenclature and type collection extent are given for public consultation. There are 504 lots of sharks, batoids and chimaeras that are classified within 10 orders, 22 families, 34 genera, and 64 species. Myliobatiformes and Carcharhiniformes represent taxa with higher number of lots in which freshwater stingrays (Potamotrygonidae) and requiem sharks (Carcharhinidae) stand out. Specimens were mostly collected in the marine coastline off Paraíba state and lower Amazonian region, which set UFPB fish collection as an outstanding scientific collection of the regional genetic heritage.

Download Full-text

Fish fauna of small streams of the Catua-Ipixuna Extractive Reserve, state of Amazonas, Brazil

Check List ◽

10.15560/5.2.154 ◽

2009 ◽

Vol 5 (2) ◽

pp. 154 ◽

Cited By ~ 4

Author(s):

Renildo Ribeiro de Oliveira ◽

Marcelo Salles Rocha ◽

Maeda Batista dos Anjos ◽

Jansen Zuanon ◽

Lúcia H. Rapp Py-Daniel

Keyword(s):

Species Richness ◽

Fish Species ◽

Fish Fauna ◽

Conservation Unit ◽

Extractive Reserve ◽

Small Streams ◽

Total Fish ◽

Amazonas State ◽

Solimões River ◽

Hydrographic Network

This study was conducted in an Amazonas state conservation unit, the Catuá-Ipixuna Extractive Reserve (Catuá-Ipixuna RESEX). The main purpose was to provide an ichthyological survey of its small streams, all them tributaries of the Solimões River. Nine small streams (up to 4 m width and 1 m depth) were sampled in September 2006. A total of 1,525 specimens were captured, belonging to 78 species, 24 families and eight orders. Eight species had higher abundances and represented altogether 61.4 % of all collected specimens (Hemigrammus belotii, Microphilypnus amazonicus, Physopyxis ananas, Apistogramma agassizii, Elachocharax pulcher, Apistogramma cf. cruzi, Gladioglanis conquistador and Copella nigrofasciata). Based on the high number of singletons and doubletons present in our samples, as well as the estimated number of species for those streams (106 spp.), we believe that the total fish species richness present in the Catuá-Ipixuna Extractive Reserve may be considerably higher than indicated by our samples. This seems especially true when considering the dimensions of the Catuá-Ipixuna RESEX and the dense hydrographic network present in the area.

Download Full-text

First Report of Rhabdodendraceae for the Vascular Flora of Colombia and the Upper Río Negro Basin, with Comments on Phytogeography, Habitats, and Distribution ofRhabdodendron amazonicum

Harvard Papers in Botany ◽

10.3100/hpib.v21iss1.2016.n2 ◽

2016 ◽

Vol 21 (1) ◽

pp. 5-21 ◽

Cited By ~ 1

Author(s):

Gerardo A. Aymard ◽

Henry Arellano-Peña ◽

Vladimir Minorta-C. ◽

Francisco Castro-Lima

Keyword(s):

Vascular Flora ◽

First Report ◽

Rio Negro ◽

Flora Of Colombia ◽

Rio Negro Basin

Download Full-text

A new species of Rineloricaria (Siluriformes: Loricariidae: Loricariinae) from rio Daraá, rio Negro basin, Amazon, Brazil

Neotropical Ichthyology ◽

10.1590/s1679-62252008000300007 ◽

2008 ◽

Vol 6 (3) ◽

pp. 339-346 ◽

Cited By ~ 6

Author(s):

Lúcia H. Rapp Py-Daniel ◽

Ilana Fichberg

Keyword(s):

New Species ◽

Pectoral Fin ◽

Variable Size ◽

Lower Lip ◽

Rio Negro ◽

Fin Rays ◽

Amazonas State ◽

Rio Negro Basin ◽

A New Species ◽

Pectoral Fin Rays

Rineloricaria daraha, new species, is described from the rio Daraá, tributary of rio Negro, northwestern Amazonas State, Brazil. The new species is diagnosed by having seven branched pectoral-fin rays, finger-like papillae on the lower lip, a large multi-angular preanal plate, and at least four quadrangular plates of variable size surrounding the preanal plate. The new species is known only from rio Daraá and its waterfalls.

Download Full-text