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| Rosso,Juan J.; Rosso,Franco del; Mabragaña,Ezequiel; Schenone,Nahuel F.; Avigliano,Esteban; Astarloa,Juan M. Díaz de. |
| ABSTRACT Poeciliids comprise around 300 species inhabiting the fresh and brackish waters of the Americas and Africa. Poecilia reticulata is native to Northeastern South America and Trinidad and Tobago. In this paper, introduced specimens of P. reticulata collected in the lower Paraguay River in Argentina, were characterized by means of molecular and taxonomic approaches. We further explore, by means of DNA Barcoding, the singularity of the genetic identity of these specimens. Ocurrence of P. reticulata in the lower Paraguay River represents the first record of this species in Argentina. Thirteen individuals of P. reticulata were collected. DNA barcoding showed that all five specimens sampled belong to a single mitochondrial lineage, which was also present... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Argentina; DNA Barcoding; Guppy; Poecilia; Taxonomy. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000400205 |
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| Rocha,Thiago L.; Carvalho,Rodolfo; Yamada,Áureo T.; Sabóia-Morais,Simone M. T.. |
| The present study evaluated and characterized the different phases of development and the cell types present in the gill epithelium of embryos, larvae, and fingerlings of guppy (Poecilia vivipara Bloch & Schneider, 1801) specimens exposed to water with salinity ranging from 0 to 20. The development of P. vivipara was classified into eight phases. The yolk was intensely eosinophilic, with glycidic and lipidic components between phases 1 to 7. After the development of their branchial epithelium, the presence of pavement cells, mitochondria-rich cells, and mucous cells (MCs) was observed. The understanding of ontogenesis indicates the sequence of cellular origin. Only type IV MCs located in the gill rays was detected from phase 3 through phase 7.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Developmental biology; Euryhalinity; Guppy; Mucous cells; Teleosts. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000400007 |
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| Salgado Zamora,Héctor; Azpeitia Hernández,Aída; Marañón Herrera,Samuel; Maya Peña,Eduardo. |
| Se investigó el efecto del esteroide semisintético acetato de trembolona (ATB) en el pez de ornato Poecilia reticulata (guppy). Especímenes juveniles de 30 días de edad fueron tratados con el esteroide a dosis de 300 mg/kg de alimento durante 60 días. Al término del tratamiento, 40 días después, se estimó el efecto residual del esteroide. Se analizó la sobrevivencia, la proporción de peces masculinizados, así como el efecto anabólico. Los resultados indicaron que el ATB es eficaz para inducir la masculinización, a diferencia del grupo testigo, donde se registraron 32% de machos. Asimismo, el ATB tuvo un efecto anabólico, ya que los peces tratados mostraron mayor peso y talla e incremento de la aleta caudal. El esteroide no causó daño en la población... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Esteroide anabólico; Pez ornamental; Guppy; Poecilia Reticulata; Masculinización. |
| Ano: 2008 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0301-50922008000300004 |
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| Monaco, Isabelle de Almeida; Universidade Estadual de Mato Grosso do Sul; Súarez, Yzel Rondon; Universidade Estadual de Mato Grosso do Sul; Lima-Junior, Sidnei Eduardo; Universidade Estadual de Mato Grosso do Sul. |
| With the objective of evaluating the influence of the environmental integrity on feeding, condition factor and reproduction of Phalloceros harpagos, the species biology was analyzed in the Tarumã Stream micro-basin, Naviraí, Mato Grosso do Sul State (upper Paraná river). Samples were collected from 2007 to 2010, and biometric data of specimens was registered. Stomach and gonad were taken for the analysis of feeding and reproduction, respectively. The species is detritivore, showing a high flexibility in the diet. Debris and sediment, followed by plant and algae were the most ingested items. As for the condition factor, no definite pattern was observed in the values for both sexes, probably because the species has a long reproductive period. The frequency... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.00.00.00-6 Poeciliidae; Guppy; Environmental degradation Ciências Biológicas. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/21394 |
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