Consulta: creatorFacets:"Ruano, Francisco"
Registros recuperados: 7
Data/hora: 07/06/2024 01:40:26

An infection of Ruditapes decussatus (Bivalvia) by Rickettsia
Provedor de dados: 5
Autores: Mialhe, Eric; Chagot, Dominique; Boulo, Viviane; Comps, Michel; Ruano, Francisco; Grizel, Henri.
The authors report the presence of a Rickettsia in Ruditapes decussatus from natural populations of the Algarve (Portugal). Light microscopic shows infections of varying importance in gill tissues. Some enclose small procaryotic colonies (cp) scattered in all lamellae; in others, the colonies are scarce and hypertrophic (100 mu m). These different pictures suggest an amplification process. Digestive diverticulae may also be infected, but to a lesser extent. The ultrastructural features of this intravacuolar (mvd: densified vacuolar membrane) procaryote (P) and its multiplication by scission without a complex developmental cycle allows its classification in the order Rickettsiales.
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Pathogens; Histopathology; Pathology.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-3107.pdf

Comparative study of shell shape and muscle scar pigmentation in the closely related cupped oysters Crassostrea angulata, C. gigas and their reciprocal hybrids
Provedor de dados: 5
Autores: Batista, Frederico; Ben-hamadou, Radhouan; Fonseca, Vera; Taris, Nicolas; Ruano, Francisco; Reis-henriques, Maria; Boudry, Pierre.
The taxonomic status of the cupped oysters Crassostrea angulata and C. gigas has received considerable attention in the last decades. Based on larval shell morphology, experimental hybridization, allozymes and nuclear DNA studies several authors have considered these two taxa as being synonymous. However, mitochondrial data showed clear genetic differences between the two taxa. In addition, microsatellite-based studies and cytogenetic studies have also provided evidence that supports their differentiation. Considerable differences have also been observed at the phenotypic level in terms of growth rate and ecophysiological parameters. In the present study, C. angulata from Sado estuary (Portugal) and C. gigas from Seudre estuary (France) were collected and...
Tipo: Text
Palavras-chave: Crassostrea gigas; Crassostrea angulata; Hybridization; Shell pigmentation; Shell morphology.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3904.pdf

Detection of ostreid herpesvirus 1 DNA by PCR in bivalve molluscs: A critical review
Provedor de dados: 5
Autores: Batista, Frederico; Arzul, Isabelle; Pepin, Jean-francois; Ruano, Francisco; Friedman, Carolyn S.; Boudry, Pierre; Renault, Tristan.
Herpes-like viral infections have been reported in different bivalve mollusc species throughout the world. High mortalities among hatchery-reared larvae and juveniles of different bivalve species have been associated often with such infections. The diagnosis of herpes-like viruses in bivalve molluscs has been performed traditionally by light and transmission electron microscopy. The genome sequencing of one of these viruses, oyster herpesvirus 1 (OsHV-1), allowed the development of DNA-based diagnostic techniques. The polymerase chain reaction (PCR) has been used for the detection of OsHV-1 DNA in bivalve molluscs at different development stages. In addition, the PCR used for detection of OsHV-1 has also allowed the amplification of DNA from an OsHV-1...
Tipo: Text
Palavras-chave: Oyster; Bivalve molluscs; PCR; Detection; OsHV 1; Herpesvirus.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2322.pdf

Histological study of a cellular reaction in Ruditpaes decussatus infected by a protozoan
Provedor de dados: 5
Autores: Chagot, Dominique; Comps, Michel; Boulo, Viviane; Ruano, Francisco; Grizel, Henri.
An infection caused by a Perkinsus -like parasite has been observed in Ruditapes decussatus from Portugal (Comps and Chagot, 1987). Following a pathological study carried out on clams affected by mortalities in the Algarve area, this parasite was found again, inducing a reaction process in the host. Histological examination reveals the parasite in the connective tissue of different organs. The adjoining tissues, particularly the epithelia, are not affected.
Tipo: Text
Palavras-chave: Cells; Histology; Pathology; Ruditapes decussatus.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-3109.pdf

New insights about the introduction of the Portuguese oyster, Crassostrea angulata, into the North East Atlantic from Asia based on a highly polymorphic mitochondrial region
Provedor de dados: 5
Autores: Grade, Ana; Chairi, Hicham; Lallias, Delphine; Power, Deborah M.; Ruano, Francisco; Leitao, Alexandra; Drago, Teresa; King, Jonathan W.; Boudry, Pierre; Batista, Frederico M.
It is commonly presumed that the Portuguese oyster Crassostrea angulata was introduced into the North East (NE) Atlantic from Asia. The analysis of the nucleotide sequence of a highly polymorphic non-coding mitochondrial region (major noncoding region - MNR) of C. angulata samples collected in Europe (Portugal), Africa (Morocco) and Asia (Shantou and Taiwan) provided new insight into the introduction of this species into the NE Atlantic. Sixty haplotypes and a nucleotide diversity of 0.0077 were observed in 130 analyzed sequences. Higher nucleotide diversity levels were observed in NE Atlantic sites than in Asian sites and significant genetic differentiation was found between the two. Our results suggest that C. angulata might have been introduced to the...
Tipo: Text
Palavras-chave: Crassostrea angulata; Phylogeography; Genetic signature; Biological invasions.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00371/48200/48316.pdf

Insights on the association between somatic aneuploidy and ostreid herpesvirus 1 detection in the oysters Crassostrea gigas, C. angulata and their F1 hybrids
Provedor de dados: 5
Autores: Batista, Frederico M.; Lopez-sanmartin, Monserrat; Boudry, Pierre; Navas, Jose I.; Ruano, Francisco; Renault, Tristan; Fonseca, Vera G.; Leitao, Alexandra.
Cytogenetic abnormalities associated with viral infections, including from viruses of the Herpesvirales order, have been reported in vertebrate species. Ostreid herpesvirus 1 (OsHV-1) has been detected worldwide during mortality outbreaks of the Pacific oyster Crassostrea gigas. On the other hand, a high proportion of aneuploid cells in somatic tissues have been observed in C. gigas. In this study, we analysed the putative association between aneuploidy levels and the detection of OsHV-1 in gills of C. gigas, the Portuguese oyster C. angulata and their F1 hybrids cultured in Ria Formosa (Portugal). OsHV-1 was detected by PCR in 5.4% of the total of oysters analysed (n = 111) namely in 11.1%, 8.0% and 1.7% of C. gigas, C. angulata and F1 hybrid...
Tipo: Text
Palavras-chave: Aneuploidy; Ostreid herpesvirus 1; Oyster; Crassostrea.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00215/32581/35759.pdf

Ultrastructural study of sporulated instars of a haplosporidian parasitizing the clam Ruditapes decussatus
Provedor de dados: 5
Autores: Chagot, Dominique; Bachere, Evelyne; Ruano, Francisco; Comps, Michel; Grizel, Henri.
In 1951, Vilela pointed out the presence of a haplosporidian parasitizing Ruditapes decussatus from Portuguese waters and created the species Haplosporidium tapetis. Later, a haplosporidian was found in the same species originating from the pound of Thau (France).
Tipo: Text
Palavras-chave: Haplosporidian paratizing; Ruditapes decussatus; Pathology.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-3110.pdf