|
|
|
| Registros recuperados: 10 | |
|
|
| Abilhoa,Vinícius; Bornatowski,Hugo; Otto,Gislaine. |
| Feeding habits of the characin Hollandichthys multifasciatus were investigated. Samplings were made between March 2004 and February 2005 in two black water streams of the coastal Atlantic rainforest in southern Brazil. The diet, evaluated by qualitative and quantitative methods, included aquatic and terrestrial insects, decapods, oligochaetes, plants and spiders. Large individuals feed mainly on plants, terrestrial insects, and spiders, whereas small fish feed basically on plants and oligochaetes. The species showed an omnivorous feeding habit, and its diet was composed of autochthonous (mainly oligochaetes) and allochthonous (plants and terrestrial insects) material. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Characin; Diet Feeding ecology Freshwater Neotropics. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000300008 |
| |
|
|
| 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 |
| |
|
| |
|
| |
|
| |
|
|
| Wolff,Luciano Lazzarini; Abilhoa,Vinícius; Rios,Flavia Sant'Anna; Donatti,Lucélia. |
| This study described the feeding habits of the characin Astyanax aff. fasciatus. The diet compositions of specimens from two sites (A and B) on a river in Southern Brazil were compared according to the size of individuals and seasonal period. The collections were performed monthly from March 2005 to February 2006, where the stomach contents of 290 specimens were assessed. Food items for A. aff. fasciatus were basically composed of plants and insects, especially leaf fragments, seeds, fruits, filamentous algae, aquatic and terrestrial insects and insect fragments. At site A, the most common items were insect and plant fragments. Conversely at site B, plant fragments were more representative. In general, all items of animal origin showed the highest feeding... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Resource availability; Feeding flexibility; Omnivore; Niche shifts; Freshwater. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000200018 |
| |
|
|
| Domingues,Manoela de S.; Vicari,Marcelo R.; Abilhoa,Vinícius; Wamser,João P.; Cestari,Marta M.; Bertollo,Luiz A. C.; Almeida,Mara C. de; Artoni,Roberto F.. |
| The recently described fish species, Astyanax altiparanae (tetra) is common in the upper rio Paraná basin, and has been reported in the Iguaçu basin. However, its natural origin in the rio Iguaçu is questionable. In the present work, karyotypical and morphological features of two populations of Astyanax altiparanae from the upper rio Tibagi and upper rio Iguaçu were compared. Both populations showed 2n=50 chromosomes and differences in their karyotype formula, NOR-bearing chromosomes and location of heterochromatin. Morphometric data from both populations were analyzed through free-size canonical variables. Cytogenetic and morphological results were mostly coincident showing exclusive markers that reflect their degree of populational isolation. In addition... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tetra; Karyotype evolution; Distribution; Morphometry. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000100005 |
| |
|
| |
|
|
| Abilhoa,Vinícius. |
| Neste trabalho é descrita a estrutura populacional, os hábitos alimentares e a reprodução de Astyanax scabripinnis Jenyns, 1842, baseado em coletas realizadas mensalmente entre outubro de 1998 e setembro de 1999, em um riacho das cabeceiras do rio Iguaçu. A distribuição de freqüência por classe de comprimento revelou valores diferentes entre machos (5,4-6,7 cm) e fêmeas (6,1-8,1 cm). Foram encontradas diferenças significativas para os valores do fator de condição entre os sexos, o que pode implicar em diferentes taxas de crescimento. O período reprodutivo ocorreu entre outubro e março, como já descrito para outros caracídeos da mesma região. Fragmentos de insetos terrestres, restos de vegetais superiores e larvas de insetos aquáticos foram os principais... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alimentação; Estrutura populacional; Parâmetros biológicos. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000400016 |
| |
| Registros recuperados: 10 | |
|
|
|
