|
|
|
|
|
| Eiras-Stofella,Daura Regina; Gremski,Waldemiro; Kuligowski,Sandra Maria. |
| The structure of the spermatozoon of Mugil curema Valenciennes, 1836 was studied using scanning and transmission electron microscopy. The spermatic head is rounded and formed by the nucleus containing granular chromatin, firmly packed resulting in a mass extremely electron dense. The acrossome is absent. The midpiece is characterized by the presence of two centrioles, a plasmatic canal, very few vesicles, and several mitochondria (9-10) with aproximately 0.50µm in diameter. The head and the midpiece are aproximately 1.56µm in diameter. The flagellum conforms to the 9 + 0 flagellar pattern near the transition region in its midpiece and is 9 + 2 from there on up to the distal region of the axoneme. The electron density in the A tubules 1, 2, 5 and 6 shows... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Teleostei; Mugilidae; Mullet; Mugil curema; Ultrastructure; Spermatozoa. |
| Ano: 1993 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751993000400007 |
| |
|
|
| Quintela,Fernando Marques; Corrêa,Fabiano; Gava,Adriana. |
| Abstract: The coastal streams of southernmost Brazil, Rio Grande do Sul state, are marked by a period of regular marine intrusion resultant from intense oceanic winds. In the present study we aimed to investigate the species composition, abundance and relative biomass of the ichthyofauna in the lower stretch of a coastal stream during summer, a period of regular marine intrusion. Estreito is a coastal hydrological complex composed by lakes, swamps and a perennial stream, located at the central-south portion of the coastal plain of Rio Grande do Sul state. During the summer of 2018, the ichthyofauna of lower Estreito stream was sampled by beach hauls applied in 17 random points distributed in a stretch of ca. 2km. Measurements at the sampled stretch... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Jenynsia lineata; Mugil curema; Geophagus brasiliensis; Ichthyofauna dynamics; Salinity; Washout. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000100501 |
| |
|
|
|
