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| González-Díaz,Alfonso Ángel; Díaz-Pardo,Edmundo; Soria-Barreto,Miriam; Martínez-Ramírez,Emilio. |
| El género Profundulus es uno de los grupos de peces más antiguos, distribuidos al norte de América Central en México, Guatemala y Honduras. No obstante, son pocos los trabajos que se han realizado para conocer el número de especies que lo conforman y sus relaciones filogenéticas. Históricamente se reconoció que este taxón estaba conformado por dos grupos naturales, actualmente considerados como los subgéneros Profundulus y Tlaloc. Recientes investigaciones genéticas han revelado un alto grado de diferenciación entre ambos taxones y algunas de sus especies, lo cual probablemente este asociado a cambios morfológicos. De esta manera, se realizó la comparación osteológica entre seis especies de los subgéneros Profundulus y Tlaloc (Cyprinodontidae:... |
| Tipo: Journal article |
Palavras-chave: Cyprinodontiformes; Centroamérica; Peces dulceacuícolas; Osteología comparada; Neurocraneo; Branquiocraneo. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000300053 |
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| Aranha,José Marcelo Rocha; Caramaschi,Érica Pellegrini. |
| The population structure, reproductive aspects and feeding of Phalloceros caudimaculatus (Hensel, 1868), Poecilia vivipara Bloch & Schneider (1801), Phalloptychus januarius (Hensel, 1868) e Jenynsia lineata (Jenyns, 1842) were studied in five sampling stations in the Ubatiba stream, municipality of Maricá (State of Rio de Janeiro, Brazil). In relation to the population structure, P. caudimaculatus was more representative upstream; P. vivipara mid-stream and downstream; P. januarius and J. lineata downstream. The species presented preponderance of females, except in the intermediate length classes. The occurence of imatures and females with young pointed out a long reproductive period and favoured areas for reproduction of the four species. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cyprinodontiformes; Population structure; Feeding; Reproduction; Coastal stream. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000300005 |
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| Volcan,Matheus Vieira; Fonseca,Alinca Peres da; Figueiredo,Mário Roberto Chim; Sampaio,Luís André; Robaldo,Ricardo Berteaux. |
| This study evaluated the effect of temperature on growth of Austrolebias nigrofasciatus, an endemic and threatened annual killifish species of the Patos-Mirim lagoon system in Southern Brazil. In order to verify the effect of temperature on initial growth of A. nigrofasciatus, eggs stored in the laboratory were hatched and juveniles reared for eight weeks at 16 and 22 ºC. The standard length of newly hatched fishes was 4.67 ± 0.25 mm and after eight weeks they reached 23.68 ± 3.73 and 22.68 ± 5.36 mm, respectively at 16 and 22 ºC. However, initial growth of fish reared at 22 ºC was faster and they reached sexual dimorphism at an earlier age compared to those reared at 16 ºC. Final length of females reared at 22 ºC was 23.00 ± 2.83 mm, they were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Annual fish; Laboratory conditions; Cyprinodontiformes; Rivulidae. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000400007 |
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