Search results for: Andréa Bialetzki

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Chronology of invasion and establishment of Pterygoplichthys ambrosettii (Holmberg 1893), in the upper Paraná River basin

Jislaine Cristina da Silva, Gabriela Cassia Zanon Reinas, Angelo Antonio Agostinho, Andréa Bialetzki

Journal of Applied Ichthyology > 38 > 4 > 434 - 441

Invasions of non‐native fish species are generally associated with human activities that violate historically insurmountable barriers to species on local and global scales. For Pterygoplichthys ambrosettii (Holmberg 1893), invasive to the upper Paraná River basin, informations about introduction and period of occupation are uncertain. Thus, aim of this study was to establish the invasion chronology...

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Larval development of the freshwater croaker Pachypops fourcroi (La Cépède 1802) (Perciformes: Sciaenidae)

Lucas S. Oliveira, Ruineris A. Cajado, Fabíola K. S. Silva, Andréa Bialetzki, more

Journal of Fish Biology > 99 > 6 > 2056 - 2059

The larval development of Pachypops fourcroi from the lower Amazon River was described through morphological, meristic and morphometric features. Sixty‐five larvae were examined and present a moderate body, slightly elliptical eyes and head ranging from moderate to large. The mouth is initially terminal and becomes subterminal throughout development with three barbels in the mentonian region. The...

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Early ontogeny of yellowtail tetra fish Astyanax lacustris (Characiformes: Characidae)

Joyce A. Santos, Claudemir M. Soares, Andréa Bialetzki

Aquaculture Research > 51 > 10 > 4030 - 4042

The ontogeny of the tetra fish Astyanax lacustris, from embryogenesis through the larval and juvenile periods, is presented. The eggs and larvae were obtained through induced reproduction. The larvae were collected at hatching and daily, until all stages of development were obtained and, later, once a week, until the juvenile period. The eggs are small, slightly adhesive and demersal, and have a transparent...

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Fish larvae diversity in a conservation area of a neotropical floodplain: influence of temporal and spatial scales

Camila Barbosa Silva, Juliana Déo Dias, Andréa Bialetzki

Hydrobiologia > 2017 > 787 > 1 > 141-152

The diversity of fish larvae in floodplain environments exhibits spatial and temporal variations since fish have different ontogenetic requirements, and is influenced by their reproductive period. In order to evaluate how the diversity of fish larvae is structured in different temporal and spatial scales in the sub-basin of the Ivinhema River, Upper Paraná River floodplain (MS, Brazil), we performed...

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Temporal and spatial distributions of the fish larval assemblages of the Ivinheima River sub-basin (Brazil)

David Augusto Reynalte-Tataje, Angelo Antônio Agostinho, Andréa Bialetzki

Environmental Biology of Fishes > 2013 > 96 > 7 > 811-822

Fish, like other animals, choose environments for reproduction that are favorable for their offspring’s initial development. For example, these environments may be chosen to provide shelter and food. This study examined the fish larvae inhabiting the Ivinheima River sub-basin. The study aimed to (i) characterize the taxonomic composition of the larval fish fauna, (ii) analyze the structure of the...

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Spatial and temporal variation of the ichthyoplankton in a subtropical river in Brazil

David Augusto Reynalte-Tataje, Angelo Antônio Agostinho, Andrea Bialetzki, Samara Hermes-Silva, more

Environmental Biology of Fishes > 2012 > 94 > 2 > 403-419

Studies that assess reproduction dynamics and ichthyoplankton distributions are scarce for the upper Uruguay River, especially in environments such as tributary mouths. Therefore, this study aimed to evaluate: (i) ichthyoplankton composition; (ii) spatial and temporal variation in ichthyoplankton abundance; and (iii) relationships between environmental variables and the abundance of ichthyoplankton...

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Larval fish assemblage in the Baía River (Mato Grosso do Sul State, Brazil): temporal and spatial patterns

Andréa Bialetzki, Keshiyu Nakatani, Paulo Vanderlei Sanches, Gilmar Baumgartner, more

Environmental Biology of Fishes > 2005 > 73 > 1 > 37-47

Synopsis We sampled the Baía River (Mato Grosso do Sul State, Brazil) monthly, to survey taxonomic composition and temporal and spatial distribution of fish larvae. The ichthyoplankton was mainly composed by larvae of small and medium sized sedentary species and it was numerically dominated by six taxa: Plagioscion squamosissimus, Hypophthalmus edentatus, Hoplias aff. malabaricus, Bryconamericus stramineus...

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Ontogenetic shifts in digestive tract morphology and diet of fish larvae of the Itaipu Reservoir, Brazil

Maristela Cavicchioli Makrakis, Keshiyu Nakatani, Andréa Bialetzki, Paulo Vanderlei Sanches, more

Environmental Biology of Fishes > 2005 > 72 > 1 > 99-107

We analyzed the ontogenetic shifts in digestive tract morphology and diets of the young of Iheringichthys labrosus, Hypophthalmus edentatus and Plagioscion squamosissimus, sampled in the Itaipu Reservoir, Brazil-Paraguay. We described the dental structures, the gill rakers and the digestive tract, and analyzed the diet of the young fish. We observed teeth in the jaws and pharynx in young of the three...

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Identification of spawning sites and natural nurseries of fishes in the upper Paraná River, Brazil

Gilmar Baumgartner, Keshiyu Nakatani, Luiz Gomes, Andréa Bialetzki, more

Environmental Biology of Fishes > 2004 > 71 > 2 > 115-125

We studied the timing of migratory fish spawning in the last dam-free stretch of the upper Paraná River and in Itaipu Reservoir. Eggs were more common in the Amambai and Ivaï Rivers, while larvae predominated in the Paraná River and in Itaipu Reservoir. Both eggs and larvae were more abundant at night. The highest abundance of eggs was in October and that of larvae in November. Migratory species predominated...

article

Identification of spawning sites and natural nurseries of fishes in the upper Paraná River, Brazil

Gilmar Baumgartner, Keshiyu Nakatani, Luiz Carlos Gomes, Andréa Bialetzki, more

Environmental Biology of Fishes > 2004 > 71 > 2 > 115-125

Synopsis We studied the timing of migratory fish spawning in the last dam-free stretch of the upper Paraná River and in Itaipu Reservoir. Eggs were more common in the Amambai and Ivaï Rivers, while larvae predominated in the Paraná River and in Itaipu Reservoir. Both eggs and larvae were more abundant at night. The highest abundance of eggs was in October and that of larvae in November. Migratory...

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