Ocorrência de ovos e larvas de Characiformes migradores no Rio Negro, Amazonas, Brasil

Oliveira, Edinbergh Caldas de; Ferreira, Efrem Jorge Gondim

doi:10.1590/1809-43922002321168

Cited by 2 publications

(2 citation statements)

References 3 publications

(4 reference statements)

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“…Considering these aspects, black water rivers of the Amazon basin, with its low-nutrient content, are very different from the whitewater rivers (Goulding et al, 1988;Walker, 1990) and poorly studied (Oliveira & Ferreira, 2002).…”

Section: Introductionmentioning

confidence: 99%

Spawning areas, dispersion and microhabitats of fish larvae in the Anavilhanas Ecological Station, rio Negro, Amazonas State, Brazil

Oliveira

Ferreira

2008

Neotrop. ichthyol.

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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 was undertaken during the falling water period of 2001 and the rising water period of 2002, in a section of 100 km subdivided into 5 subsections, with a total of 20 stations (5 beaches, 5 ravines, 5 channels, and 5 lake channels) at night and during the day at the surface and at the bottom. 647 eggs and 4,187 larvae were captured, belonging to 10 families and four orders: Characiformes (6), Siluriformes (2), Perciformes (1), and Clupeiformes (1). Engraulidae (55.39%), Pimelodidae (30.45%), Auchenipteridae (5.23%) and Sciaenidae (5.13%) were the dominant families. The hierarchical statistical model (ANOVA) with three factors (microhabitat, depth and period) was applied to the environmental variables and the larval abundance, showing greater abundances of sciaenids in the ravines and lower abundances of engraulids in the channels. The highest captures were obtained at lower temperature values, at the bottom during the day and at the surface at night, suggesting an active larval behavior. The presence of the four larval development stages in all subsection for pimelodids and sciaenids, and in three subsections for engraulids, indicates that the Anavilhanas Ecological Station is an important spawning and nursery area for species of these groups in the Negro River. Larvae abundance of all characiform families was extremely low (from 0.1 to 1.17%), suggesting that they do not spawn in this system.A abundância e distribuição do ictioplâncton e suas relações com a velocidade da corrente, temperatura, oxigênio dissolvido, pH e condutividade elétrica da água na Estação Ecológica Anavilhanas, rio Negro, Amazonas, Brasil, foram investigadas, bem como o uso de áreas e microhabitats preferenciais para desova, dispersão e criação. As coletas foram realizadas em dois perío-dos: vazante de 2001 e enchente de 2002, em um trecho de 100 km dividido em cinco subseções, e em cada um delas foram amostrados os microhabitats praia, barranco, canal e canal de lago, com um total de 20 pontos de coletas (cinco praias, cinco barrancos, cinco canais e cinco canais de lago). As coletas foram realizadas durante o dia e à noite na superfície e no fundo. 647 ovos e 4.187 larvas de peixes foram capturados, pertencentes a quatro ordens e dez famílias: Characiformes (6), Siluriformes (2), Perciformes (1) e Clupeiformes (1). As famílias dominantes foram Engraulidae (55,39%), Pimelodidae (30,45%), Auchenipteridae (5,23%) e Sciaenidae (5,13%). O modelo de estatística hierárquica (ANOVA) com três fatores (microhabitat, profundidade e período) foi aplicado às variáveis ambientais e às abundâncias de larvas, mostrando maior abundância de Sciaenidae nos barrancos e menor de Engraulidae nos canais. As maiores ca...

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Section: Introductionmentioning

confidence: 99%

Spawning areas, dispersion and microhabitats of fish larvae in the Anavilhanas Ecological Station, rio Negro, Amazonas State, Brazil

Oliveira

Ferreira

2008

Neotrop. ichthyol.

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“…Some of the fish species found in this study exhibit short-to long-distance migratory habits, including C. macropomum, B. amazonicus, B. melanopterus, P. brachypomus, P. granulosus, P. blochii, T. albus, T. angulatus, and T. auritus (Araujo-Lima & Ruffino, 2003;Menezes & Vazzoler, 1992;Oliveira & Ferreira, 2002). In South American rivers, there is a high number of fish species that perform reproductive or trophic migrations (Araujo-Lima & Ruffino, 2003), including species of Characiformes and Siluriformes.…”

Section: Discussionmentioning

confidence: 89%

Viability of Seeds Consumed by Fishes in a Lowland Forest in the Brazilian Central Amazon

Weiss

Zuanon

Piedade

2016

Tropical Conservation Science

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Várzeas are forest areas seasonally flooded by white-water rivers and have a variety of tree species, which bear fruit during the filling or flood and in the beginning of low water periods. During those periods of inundation, fruits and seeds are important resources for different fish species. In this study, the viability of whole seeds removed from the stomach and intestine of fishes was analyzed. Fishes were collected with gillnets installed during 24-hr cycles along the flooded forest, during the filling, flood, and in the beginning of low water periods of the Year 2014 in the Catalão lake, Brazilian Central Amazon. In total, 1,915 specimens of fish were captured, and 148 specimens (8% from the total) contained seeds in their digestive tracts. Some fishes that consumed seeds are species commercially important and have migratory habits. Fishes consumed 3,092 seeds. All whole seeds removed from the digestive tracts of fishes were seeded in várzea soil and maintained in a greenhouse. Seeds of 16 plant species (89%) germinated. Our conclusion is that fish species can play an important role in the ecology of várzea forests by dispersing seeds, contributing to the colonization of new areas, and allowing genetic flow between subpopulations distributed along the rivers.

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Ocorrência de ovos e larvas de Characiformes migradores no Rio Negro, Amazonas, Brasil

Cited by 2 publications

References 3 publications

Spawning areas, dispersion and microhabitats of fish larvae in the Anavilhanas Ecological Station, rio Negro, Amazonas State, Brazil

Spawning areas, dispersion and microhabitats of fish larvae in the Anavilhanas Ecological Station, rio Negro, Amazonas State, Brazil

Viability of Seeds Consumed by Fishes in a Lowland Forest in the Brazilian Central Amazon

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