A alimentação de juvenis de matrinxã, Brycon amazonicum (Pisces, Characidae), em áreas inundadas da Ilha de Marchantaria, Amazonas, Brasil

Leite, Rosseval Galdino

doi:10.1590/s0044-59672004000400018

Cited by 13 publications

(13 citation statements)

References 5 publications

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“…This feature corroborates the omnivorous habits of the genus, as observed in several other studies (Breeder, 1927;Menezes, 1969;Knöpell, 1970;Goulding, 1980;Borges, 1986;Horn, 1997;Sabino & Sazima, 1999;Lima & Castro, 2000;Leite & Araujo-Lima, 2002;Drewe et al, 2004;Leite, 2004;Albrecht et al, 2009). These studies show a considerable range of food items consumed by the Brycon species such as: plant debris, terrestrial and aquatic insects, small fish, and terrestrial vertebrates.…”

Section: Feeding and Social Behavior Of Brycon Devilleisupporting

confidence: 89%

Feeding and social behavior of the piabanha, Brycon devillei (Castelnau, 1855) (Characidae: Bryconinae) in the wild, with a note on following behavior

2011

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Knowledge concerning the behavior of wild freshwater fishes in Brazil is restricted to a few studies, despite such studies being able to answer fundamental questions about conservation. Species of Brycon are amongst the most threatened in the Neotropics, particularly in southeast Brazil, due to anthropogenic activities in this region. This study investigated the feeding and social behaviors of the endangered fish, Brycon devillei in the Preto River, Jequitinhonha basin, Minas Gerais State, Brazil. Behavioral data were collected by snorkeling with four spatially separated groups (habituated), and direct observations of shoals were made using an underwater video camera (a total of 448 hours of observations). This species showed diverse tactics to obtain food. However, the species proved to be predominately a specialist surface-picker, which adopted alternative tactics to find food at certain times of the year, most notably when food items on the water surface became low. Feeding frequency was shown to be negatively correlated to agonistic behavior between conspecifics. Feeding associations were also recorded between the anostomid Leporinus garmani, acting as a nuclear species, and B. devillei, as follower species. The data presented here showed the importance of conserving the riparian environment to protect B. devillei populations. Furthermore, the present study included rare observations of nuclear-follower feeding association among freshwater fishes, especially between medium-sized characiforms, being the first observations of such kind in a Cerrado stream.O conhecimento do comportamento de vida livre em peixes de água doce brasileiros é restrito a poucos estudos e pode responder a questões fundamentais de conservação. Espécies do gênero Brycon estão entre as mais ameaçadas na região neotropical, especialmente no sudeste brasileiro, em vista de diversos impactos antrópicos. O presente estudo investigou os comportamentos alimentar e social de Brycon devillei no rio Preto, bacia do Jequitinhonha, Brasil. Para tanto, utilizou-se seções de mergulhos livres para observação direta de quatro grupos habituados de B. devillei, com o auxílio de câmeras filmadoras subaquáticas. Tal espécie apresentou variadas táticas para obtenção de alimento. Entretanto, a espécie demonstrou ser um forrageador de superfície especializado que, em determinados períodos do ano, quando provavelmente a lâmina d'água torna-se uma fonte escassa de recursos, adota táticas alternativas em busca de alimentos. A frequência de forrageamento demonstrou ser negativamente correlacionada com os comportamentos agonísticos. Foram observadas associações alimentares interespecíficas envolvendo o timburé, Leporinus garmani, como espécie nuclear, e a piabanha, Brycon devillei, como sua seguidora. Os dados apresentados no presente estudo demonstram a importância de se conservar o ambiente ripário em prol da proteção das populações de B. devillei. Além disso, o presente estudo é um dos raros registros de associação alimentar do tipo nuclear-seguidor entre peixe...

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Section: Feeding and Social Behavior Of Brycon Devilleisupporting

confidence: 89%

Feeding and social behavior of the piabanha, Brycon devillei (Castelnau, 1855) (Characidae: Bryconinae) in the wild, with a note on following behavior

2011

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“…The characiform flagship species thus contribute to several ecosystem services that bridge river types, including regulating (interbasin energy balance), supporting (seed dispersal agents), provisioning (prey for other fishes, dolphins and humans) and cultural (highly valued species). One of the candidate flagship species, matrinchã, represents connectivity not only between whitewater river floodplain nurseries and blackwater/clearwater tributaries (Leite, ), but also to upland rainforest, the streams of which it uses as refuge habitats during the low water season (Borges, ).…”

Section: Resultsmentioning

confidence: 99%

“…One of the candidate flagship species, matrinchã, represents connectivity not only between whitewater river floodplain nurseries and blackwater/clearwater tributaries (Leite, 2004), but also to upland rainforest, the streams of which it uses as refuge habitats during the low water season (Borges, 1986).…”

Section: Scale Management Challengesmentioning

confidence: 99%

Ecosystem‐based management of Amazon fisheries and wetlands

et al. 2018

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Infrastructure development and overfishing in the Amazon make it imperative to define adequate scales for the ecosystem‐based management of commercial fisheries and the wetlands on which they depend. We mapped fisheries and fish ecology data from Brazil, Peru, Bolivia and Colombia to an explicit GIS framework of river basins and mainstems. Migratory species account for more than 80% of the known maximum catches of commercial fisheries across the Amazon. Of these migratory species, we nominated six long‐distance migratory fish taxa as flagship species to define the two main commercial fishery regions. The migrations of at least one goliath catfish species define a large‐scale longitudinal link joining the Andes, Amazon Lowlands and Amazon River estuary. Migratory Characiforms demonstrate interbasin wetland connectivity between nutrient‐rich and nutrient‐poor rivers over at least 2 million km2, or about one‐third of the Amazon Basin. We show that flooded forest area is the most important wetland variable explaining regional variations in migratory characiforme biomass as indicated by maximum annual fishery catches. The sustainable management of Amazon fisheries will require transnational cooperation and a paradigm shift from local community management alone to a more integrated approach that considers both rural and urban consumers and challenges, and the realistic life histories of migratory species.

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“…The change in the location of the mouth, together with the shape and distribution of teeth in B. amazonicus during larval development, is directly related to their eating habits during this period. According to Leite () in the larval phase, the individuals feed on zooplankton and mainly on larvae of other fish. From the juvenile stage, B. amazonicus also feeds on microcrustaceans, insects, plants and seeds, depending on the season and place on the river where the animals are captured with the author classifying juveniles of the species as opportunists.…”

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Larval development of Brycon amazonicus (Teleostei, Bryconidae) with a focus on locomotory, respiratory and feeding structures

Neumann

Paes

Mendes

et al. 2018

Journal of Fish Biology

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In the present work we describe the larval development of Brycon amazonicus, with emphasis on structures linked to swimming, respiration and feeding. We monitored from larval hatching (13 h post‐fertilization) to juvenile stage. Formation of the oral cavity and differentiation of gill arches began within 4 h post‐hatching (hph) and within 11 hph the primordium of the pectoral fin appeared. At 25 hph, the head was in a rectilinear position with a terminal mouth, when the onset of tooth formation appeared. At 35 hph, gill arches were covered by the operculum and branchiostegal membrane and cusps of teeth pierced the epithelium of the premaxilla and anterior dentary region. Sharp teeth were observed in the maxilla at 171 hph and the pelvic fin primordium appeared at 243 hph, with taste buds on the tongue and the roof of the buccopharyngeal cavity. At 579 hph, all structures related to swimming and food capture were formed. Exogenous feeding of the larvae started at 29 hph, before the endogenous reserves were used up and the development of efficient swimming ability, reflecting the species' need to increasingly specialize on prey capture.

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A alimentação de juvenis de matrinxã, Brycon amazonicum (Pisces, Characidae), em áreas inundadas da Ilha de Marchantaria, Amazonas, Brasil

Cited by 13 publications

References 5 publications

Feeding and social behavior of the piabanha, Brycon devillei (Castelnau, 1855) (Characidae: Bryconinae) in the wild, with a note on following behavior

Feeding and social behavior of the piabanha, Brycon devillei (Castelnau, 1855) (Characidae: Bryconinae) in the wild, with a note on following behavior

Ecosystem‐based management of Amazon fisheries and wetlands

Larval development of Brycon amazonicus (Teleostei, Bryconidae) with a focus on locomotory, respiratory and feeding structures

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