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| García,Daniel; Loureiro,Marcelo; Tassino,Bettina. |
| Annual fishes inhabit temporary ponds that dry out seasonally and the adaptations to survive this extreme condition include high metabolic rates and an elaborate courtship behavior which ends in the deposition of drought-resistant eggs, capable of going through diapause stages in the substrate. The pronounced sexual dimorphism that these fishes show suggests that sexual selection could play a key role in the differentiation, speciation and evolution of this diverse group of fishes. However, there is scarce information about their reproductive isolation mechanisms, including detailed analysis of courtship signals. Herein, we analyzed, qualitatively and quantitatively, the reproductive behavior of Austrolebias reicherti. The behavioral units recognized in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Courtship; Killifish; Patos-Merin system; Quantitative behavioral analysis. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000200012 |
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| Fonseca,Alinca Peres da; Volcan,Matheus Vieira; Romano,Luís Alberto; Robaldo,Ricardo Berteaux. |
| ABSTRACT Laboratory breeding of annual fish is often impaired when fish fail to inflate the swim bladder after hatching. These fish, which are known as belly-sliders, cannot swim in the water column, moving mainly on the bottom of water. Therefore, we wanted to understand the factors underlying failed inflation of swim bladder in the annual fish Austrolebias nigrofasciatus and determine the implications of this condition on the growth of juveniles. To identify how the initial filling of the gaseous vesicle is compromised, and to determine the implications of this condition on juvenile growth, we analysed the histology of the swim bladder of both normal swimming fish and belly-sliders during their initial growth phase (first month of life). In addition to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Belly-sliders; Hatching; Killifish; Laboratory breeding; Pathology. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000400205 |
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| Abilhoa,Vinícius; Vitule,Jean Ricardo Simões; Bornatowski,Hugo. |
| Feeding habits of the killifish Rivulus luelingi collected in a black water stream of the Coastal Atlantic Rainforest in southern Brazil were investigated. Eight samplings were made between April 2003 and January 2004. The diet, assessed through a similarity matrix with the estimated contribution values of food items, included microcrustaceans, aquatic immature insects (larvae and pupae), aquatic adult insects, terrestrial insects, insect fragments, spiders, and plant fragments. Differences in the diet according to temporal variations (months) were registered, but changes related with size classes evaluated and high/low precipitation period were not observed. The species presented an insectivorous feeding habit, and its diet in the studied stream was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diet; Feeding habits; Freshwater; Killifish; Neotropics. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000400010 |
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| Loureiro,Marcelo; Sá,Rafael de; Serra,Sebastián W.; Alonso,Felipe; Lanés,Luis Esteban Krause; Volcan,Matheus Vieira; Calviño,Pablo; Nielsen,Dalton; Duarte,Alejandro; Garcia,Graciela. |
| ABSTRACT The family Rivulidae is the fourth most diverse clade of Neotropical fishes. Together with some genera of the related African family Nothobranchiidae, many rivulids exhibit a characteristic annual life cycle, with diapausing eggs and delayed embryonic development, which allows them to survive in the challenging seasonal ponds that they inhabit. Rivulidae also includes two species known as the only the self-fertilizing vertebrates and some species with internal fertilization. The first goal of this article is to review the systematics of the family considering phylogenetic relationships and synapomorphies of subfamilial clades, thus unifying information that is dispersed throughout the literature. From this revision, it is clear that phylogenetic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cynolebiidae; Killifish; Neotropical; Total evidence. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000300202 |
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