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	Provedor de dados Zoologia (2) BABT (1) Autor Eiras-Stofella,Daura Regina (3) Charvet-Almeida,Patricia (2) Gremski,Waldemiro (1) Kuligowski,Sandra Maria (1) Palavra-chave Scanning (2) Eugerres brasilianus (1) Freshwater fish (1) Gill (1) Gill morphology (1) Morphology (1) Mugil curema (1) Mugilidae (1) Mullet (1) Prochilodus scrofa (1) Spermatozoa (1) Teleostei (1) Ultrastructure (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2000 (1) 1998 (1) 1993 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última The ultrastructure of the mullet Mugil curema Valenciennes (Teleostei, Mugilidae) spermatozoa Zoologia 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 Ultrastructure (SEM) of the gills of Prochilodus Scrofa Steindachner (Pisces, Teleostei) Zoologia Eiras-Stofella,Daura Regina; Charvet-Almeida,Patricia. Gills arches of the freshwater fish Prochilodus scrofa Steindachner, 1881 (Lt= 8.0-12.4cm) were removed to be analyzed in a scanning electron microscope. The morphology of the superficial structures of the gill filaments and pharyngeal region of the gills arches was discussed and related to their functional aspects. A great quantity of mucous secretory cells and of microridges, along with the pavement cell surface of the primary lamellae and branchial pharyngeal region, indicate the existence of a protection strategy of the respiratory lamellae. The chloride cells are abundant, specially on the distal portion of the primary lamellae, and bring out the osmo regulatory capacity of this species. This fish seems not to be a filtering one according to: its... Tipo: Info:eu-repo/semantics/article Palavras-chave: Gill morphology; Scanning; Freshwater fish; Prochilodus scrofa. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000200001 Gills scanning images of the seawater fish Eugerres brasilianus (Gerreidae) BABT Eiras-Stofella,Daura Regina; Charvet-Almeida,Patricia. The gills of the adult fish, Eugerres brasilianus (Gerreidae) were analyzed in a scanning electron microscope. The stratified epithelium was uniform on all parts of the branchial arch. Concentric microridges were present on cells that form this epithelium and were mainly observed in the primary lamellae and pharyngeal region where mucous cells were also abundant. The ultrastructural features of E. brasilianus gills indicated that this was not a filtering species, and that the feeding habit included mainly the intake of small organisms. The results presently obtained agreed with other literature data which determined the feeding habit of this species by means of stomach content analysis and other aspects. Tipo: Info:eu-repo/semantics/article Palavras-chave: Gill; Morphology; Scanning; Eugerres brasilianus. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000400011 Registros recuperados: 3 Primeira ... 1 ... Última

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