Efrem Jorge Gondim Ferreira

Instituto Nacional de Pesquisas da Amazônia | inpa · Coordenação de Biodiversidade (CBIO)

Several species of Cichla successfully colonized lakes and reservoirs of Brazil, since the 1960’s, causing serious damage to local wildlife. In this study, 135 peacock bass were collected in a reservoir complex in order to identify if they represented a single dominant species or multiple ones, as several Cichla species have been reported in the ba...

Differences in food intake and morphological attributes may facilitate the coexistence of detritivorous fish. The present study investigated the possible differences in the feeding strategies of four species of curimatids that inhabit the floodplain of the central Amazon. For this, we determined the diet, daily food cycle, and whether characteristi...

Cytogenetic data for the genus Cichla Bloch et Schneider, 1801 are still very limited, with only four karyo-type descriptions to date. The sum of the available cytogenetic information for Cichla species, points to a maintenance of the diploid number of 48 acrocentric chromosomes, considered a typical ancestral feature in cichlids. In the current st...

The Amazon Basin is an unquestionable biodiversity hotspot, containing the highest freshwater biodiversity on earth and facing off a recent increase in anthropogenic threats. The current knowledge on the spatial distribution of the freshwater fish species is greatly deficient in this basin, preventing a comprehensive understanding of this hyper-div...

The Amazon Basin is an unquestionable biodiversity hotspot, containing the highest freshwater biodiversity on earth and facing off a recent increase in anthropogenic threats. The current knowledge on the spatial distribution of the freshwater fish species is greatly deficient in this basin, preventing a comprehensive understanding of this hyper-div...

An industrial multigear fishing fleet from Venezuela emerged in 2009 as a governmental strategy to reduce the impact of industrial trawling on the Venezuelan coast of the North Brazil Shelf Large Marine Ecosystem. The current study aimed to examine the spatial-temporal distribution of fishing effort and the catch levels obtained by the Venezuelan i...

This study presents an extensive review of published and unpublished occurrence records of fish species in the Rio Negro drainage system within the Brazilian territory.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 ver...

The Caribbean Sea and the North Brazilian Shelf are two highly interconnected Large Marine Ecosystems (GEM), where fishing is the main economic activity. Venezuela is one of the most important fishing areas in the Caribbean - Atlantic, and in 2009, the industrial fleet Polivalente Costa a Fora (multigear) emerged as a palliative after the eliminati...

This study was carried out in a section of the middle course of the Teles Pires River, a clear water river that drains ancient and highly eroded geological formations, and where five hydropower plants are planned or in construction. In this study we tested the hypothesis that local fish fauna is mainly sustained by autochthonous food resources, wit...

O período reprodutivo dos peixes difere entre as espécies, enquanto algumas têm apenas um período reprodutivo ao ano, outros desovam várias vezes ou até o ano todo. Poucos estudos sobre reprodução em populações de peixes foram feitos considerando a dispersão de ovos e larvas nos rios Amazonas e Negro. Este estudo teve como objetivo determinar o per...

The seazonal variation of larval distribution of Hypophthalmus fimbriatus and H. marginatus (Siluriformes, Pimelodidae), were studied in the Amazon and Rio Negro during four years.The variation of larval abundance was related to the an increase of water level for two species of Hypophthalmus.

Combined effects of climate change and deforestation have altered precipitation patterns in the Amazon. This has led to changes in the frequency of extreme events of flood and drought in recent decades and in the magnitude of the annual flood pulse, a phenomenon that influences virtually all aspects of river-floodplain ecosystem dynamics. Analysis...

The upper Rio Aripuanã, a clear water tributary of rio Madeira, Mato Grosso, Brazil, present extensive rapids stretches, which culminate in the Dardanelos and Andorinhas waterfalls complex. In these environments, stands of sessile plants of the family Podostemaceae harbor several species of strongly rheophilic fish. This study aimed to characterize...

In the language of Brazil’s indigenous Munduruku people, “Ocekadi” means “the river of our place.” It is their name for the Tapajós River, which forms the core of their traditional lands in the heart of the Brazilian Amazon. A region of tremendous social and biological diversity, the Tapajós river basin connects two important biomes: the tropical s...

This study aimed to characterize the food intake by the fish assemblage inhabiting aquatic macrophytes stands, evaluating the changes in food availability among the periods of the hydrologic cycle and the trophic responses of the fish assemblage along with food availability. Fish sampling was conducted in stands of aquatic macrophytes (predominantl...

pesca e o conhecimento ecológico local dos pescadores de acará-disco (Symphysodon aequifasciatus, Pellegrin 1904: Cichlidae) na Reserva de Desenvolvimento Sustentável Piagaçu-Purus, baixo rio Purus, Brasil Fishery and local ecological knowledge of the discus (Symphysodon aequifasciatus, Pellegrin 1904: Cichlidae) fishermen in the Reserva de Desenvo...

The natural history of Pygidianops amphioxus de Pinna and Kirovskyi (Neotropical Ichthyology 9:493–504, 2011), a highly specialized sand-dwelling catfish species, was studied based on underwater observations in a small forest stream in the central Amazon. Information on the feeding and reproductive biology was obtained by means of analyses of prese...

Hypotheses about phylogenetic relationships among species allow inferences about the mechanisms that affect species coexistence. Nevertheless, most studies assume that phylogenetic patterns identified are stable over time. We used data on monthly samples of fish from a single lake over 10 years to show that the structure in phylogenetic assemblages...

The group has developed activities of visiting of the research group laboratory, as well as, a puppet theatre activity about the life cycle of Semaprochilodus insignis, whose script was adapted from the children's story "O Pequeno Pinguim" [The little penguin] written by A. J. Wood. A poster regarding the life cycle of Semaprochilodus was also pres...

The present paper describes a new species of Dadayius Fukui, 1929 (Trematoda, Digenea), parasite of Symphysodon aequifasciatus Pellegrin, 1904, a freshwater fish. The fish were collected from the Purus River, Amazonas State, Brazil. This new species has a long body and, different from other species of the genus, an arch-shaped ovary and a sinuous o...

The Parque Estadual do Cantão is a protected area in the Araguaia River. In a survey carried out during a complete hydrological cycle, 271 species of fish, belonging to 183 genera, 41 families and 12 orders were captured. Characidae was the most diverse family with 89 species (32.6% of the total), followed by Loricariidae with 23 species (8.4%) and...

The structure and dynamics of fish communities were characterized by richness, abundance, diversity and stability, during high-water and low-water periods. These analyses were performed on data from the flood zone of four streams in the lower Purus River, in the Brazilian Amazon. A total of 188 species of fish were collected, distributed among 29 f...

SUMÁRIO: Introdução. 1. Desenvolvimento; 1.1 Produção e consumo; 1.2 Modalidades da pesca; 1.3 Frota; 1.4 Zonas de pesca; 1.5 Grupos de espécies exploradas; 1.6 Impac-tos Ambientais; 1.7 Conflitos e acordos; Conclusões; Recomendações; Agradecimentos; Bibliografia. RESUMO: Neste artigo é apresentado um quadro geral da atividade pesqueira na região a...

The ornamental discus fish Symphysodon aequifasciatus Pellegrin, 1904, is a popular endemic cichlid species from the Amazon basin, however scientific information concerning biology and ecology in its natural habitat is scarce despite its importance on the international aquarium trade. In this study we evaluated reproductive parameters of S. aequifa...

The study considered the influence of the hydrological cycle and gonadal development on the accumulation and use of energy in three fish species from an Amazonian flooded area. Fishes were sampled over a 24 hour period at monthly intervals between July 2004 and June 2005 using gillnets of different mesh sizes. Body cavity fat and gonadosomatic indi...

The abundance and distribution of ichthyoplankton and their relationships to current velocity, temperature, dissolved oxygen, pH and electrical conductivity of the water in the Anavilhanas Ecological Station, Negro River, Amazonas State, Brazil, were analyzed. Preferred microhabitats for spawning, dispersion and nursery were also verified. Sampling...

The diet of five species of Hemiodontidae (Hemiodus argenteus (Pellegrin, 1908), H. atranalis (Fowler, 1940), H. immaculatus (Kner, 1858), H. microlepis (Kner, 1858) e H. unimaculatus (Bloch, 1794)) from the area of influence of the Balbina Reservoir, Uatumã River, northern Brazil, was investigated. Fish were collected bimonthly from April 2005 to...

The study of fish diet and its interaction with the environment provides important data on ecology and behavior, as fish face varying environmental and food availability conditions. The aim of the present study was to determine the diet of Bryconops caudomaculatus and Bryconops alburnoides, as well as to assess its seasonal variation, within the ar...

Abstract – The influence of hydrologic cycle and trophic groups on the energy content of food was investigated for five fish species from a Central Amazonian floodplain area. Sampling was carried out monthly using gillnets of different mesh sizes immersed in water for 24 h. We examined the presence and absence of food in fish stomachs and those wit...

Cichla, with the junior synonym Acharnes, is widely distributed in the Amazon, Tocantins, and Orinoco river basins, and in the smaller rivers draining the Guianas to the Atlantic Ocean. Within South America transplanta-tions are recorded from the Paraná and Paraguay river drainages in Paraguay and Brazil, and the Paraíba do Sul and Paraguaçu rivers...

Genetic relationships and variation in meristic counts, body shape and colour were examined in a large sample of Symphysodon collected from several locations in floodplain habitats along the length of the Amazon River. Surprisingly, mitochondrial DNA indicates no difference between the two historically described species, Symphysodon discus and Symp...

The characin fish fauna associated with floating meadows on the floodplain of the Rio Negro was studied at the beginning of the rising water period. Two microhabitats were identified in the meadows (Paspalum plus Oryza vegetation and pure Oryza vegetation) and their influence on characin abundance tested. No significant difference in characin numbe...

Apistogramma angayuara is described from the rio Trombetas close to the cachoeira Vira Mundo where it is found in association with rapids. It is assigned to the A. pertensis species group, distinguished by the following characters in combination: three prominent stripes composed of dark spots along the sides of the abdomen, 2 vs. 3 postlachrymal in...

The annual flooding of the rivers in the Amazonia extends over large forest areas known as várzeas (floodplain) or igapós (flooded forest). These areas play an important role in the life of the fishes, as a source of food and shelter. We believe that the deforestation of these areas may affect negatively the fish fauna mainly by decreasing the amou...

As enchentes anuais dos rios na Amazônia alagam extensas áreas de floresta conhecidas como várzeas ou igapós. Estas áreas têm papel importante na vida dos peixes da região, pois são fontes de alimento e de abrigo. Acreditamos que o desmatamento destas áreas ocasiona prejuízos à ictiofauna principalmente pela diminuição da quantidade e diversidade d...

A ocorrência de ovos e larvas de sete espécies de Characiformes migradores em estágio de larval vitelino, pré-flexão e flexão, é descrita pela primeira vez para o rio Negro. É discutida a possibilidade de desova dessas espécies neste sistema pela fase de desenvolvimento ontogênico em que foram capturadas.

This work presents the results of a study on the fish fauna (inventory, distribution, ecological aspects) of the Rio Trombetas Basin, between Oriximiná and igarapé Caxipacoré, in the region where a future hydroelectric dam will be constructed. Collecting trips were made between 1985 and 1988, three in the dry season and three in the wet season, in...

Une nouvelle espèce du genre #Bryconexodon$ Géry (#Pisces$, #Characidae$) est décrite du cours supérieur du Rio Trombetas (Para, Brésil). #Bryconexodon$ n. sp. est très voisine de #B. juruenae$ Guéry, 1980 par la forme et la distribution des dents, mais présente moins d'écailles en ligne latérale (13-15 contre 17-19), moins de séries d'écailles au-...

Une nouvelle espèce de Cichlidae, #Crenicichla tigrina$, est décrite et illustrée. La coloration sur le vivant et quelques remarques relatives à l'écologie de cette espèce sont présentées. Les relations de #C. tigrina$ avec les autres espèces de #Crenicichla$ à petites écailles et le mode de distribution de ces espèces sont discutés. Le biotope de...

Aequidens pallidus (Heckel) reaches c. 140 mm standard length and occurs in the drainages of the blackwater rivers Negro, Puraquequara, Preto da Eva and Uatumã in Brasil. Aequidens duopunctata Haseman is a junior synonym. Aequidens tubicen sp.n., was collected in the Trombelas and Mapuera rivers a little upstream of Cachoeira Porteira. The largest...

Une série de collectes, réalisées dans le bassin du Trombetas (Brésil, Para) et le bassin du Uatuma (Brésil, Amazonas), a permis de récolter de nombreux spécimens du genre #Mylesinus$ (Characiformes, #Serrasalmidae$) de 13 à 365 mm de longueur standard. Après une mise au point de la littérature se rapportant au genre #Mylesinus, M. paraschomburgkii...

Incluye bibliografía e índice

Some 126 fish species in 28 families were captured. Although the 2 stations were separated by a 20m waterfall, the similarity between the two communities was high. In terms of biomass, predator species were dominant, in number of specimens, detritivores were more abundant. Construction of a dam would affect the equilibrium of the fish communties by...