Search results for "Dentex"
showing 6 items of 6 documents
Description of Enterovibrio nigricans sp. nov., reclassification of Vibrio calviensis as Enterovibrio calviensis comb. nov. and emended description o…
2009
Eleven strains of halophilic, facultative anaerobes isolated from healthy and diseased Dentex dentex and Sparus aurata (bony fishes) cultured in Spanish Mediterranean fisheries have been studied by a polyphasic approach that included a wide phenotypic characterization, DNA-DNA hybridization and phylogenetic analysis using 16S rRNA, recA and rpoD gene sequences. All strains were phylogenetically related to Enterovibrio species and Vibrio calviensis. On the basis of sequence analysis and DNA-DNA hybridization data, eight of the strains were identified as Enterovibrio coralii. The remaining three strains formed a tight, independent clade in all sequence analyses and showed less than 70 % DNA-D…
Considerations on the taxonomy and morphology of Microcotyle spp.: redescription of M. erythrini van Beneden & Hesse, 1863 (sensu stricto) (Monog…
2020
AbstractBackgroundMicrocotyle erythrinivan Beneden & Hesse, 1863 (Platyhelminthes: Monogenea) and other closely related species of the genus are often considered as cryptic. Records in hosts other than the type-host with no species confirmation by molecular analyses have contributed to this situation.MethodsGill parasites of five sparid fishes,Boops boops(L.),Pagellus erythrinus(L.),P. acarne(Risso), Dentex dentex(L.) andPagrus pagrus(L.), from the Western Mediterranean off Spain were collected. Specimens ofMicrocotylespp. were characterised both molecularly and morphologically. Partial fragments (domains D1-D3) of the28SrRNA gene and the cytochromecoxidase subunit 1 (cox1) gene were am…
Absence of spatial genetic structure in common dentex (Dentex dentex Linnaeus, 1758) in the Mediterranean Sea as evidenced by nuclear and mitochondri…
2018
International audience; The common dentex, Dentex dentex, is a fish species which inhabits marine environments in the Mediterranean and Northeast Atlantic regions. This is an important species from an ecological, economic and conservation perspective, however critical information on its population genetic structure is lacking. Most samples were obtained from the Mediterranean Sea (17 sites) with an emphasis around Corsica (5 sites), plus one Atlantic Ocean site. This provided an opportunity to examine genetic structuring at local and broader scales to provide science based data for the management of fishing stocks in the region. Two mitochondrial regions were examined (D-loop and COI) along…
Virulence and Molecular Typing of Vibrio harveyi Strains Isolated from Cultured Dentex, Gilthead Sea Bream and European Sea Bass
2003
Vibrio harveyi was isolated from internal organs or ulcers of diseased and apparently healthy gilthead sea bream (Sparus aurata) and European sea bass (Dicentrarchus labrax) cultured in several fish farms located on the Spanish Mediterranean coast. The prevalence of the bacterium was significantly higher in European sea bass than in gilthead sea bream, and was closely related to the season in both fish species, occurring almost exclusively on warm months (June to November). After phenotypic characterization, a selection of forty five isolates from gilthead sea bream, sea bass, and several isolates previously obtained from common dentex (Dentex dentex) of the same area, were molecularly type…
Bacteria associated with winter mortalities in laboratory-reared common dentex (Dentex dentex L.)
2007
A pathological study was conducted on laboratory-reared juvenile common dentex (Dentex dentex) suffering trickling and continuous mortalities. During a 3-month period (October-December), water temperature, clinical signs and mortalities were recorded. Moribund or dead fish were examined for bacteria and parasites. Bacteria were isolated from head kidney and external ulcers, and samples from the gills, intestine, stomach, trunk kidney, gall bladder and liver were taken for histology. Cumulative mortality reached 73%, and 80% of fish examined were positive for bacteria (102 isolates). Vibrio splendidus was the most prevalent in head kidney (59.7%) and ulcers (88.9%), and it was frequently iso…
Den pedagogiska synen på kommunikativ kompetens i språkinlärning och studentexamens deluppgift 2.2 i B-svenskan
2015
Tämän tutkimuksen tarkoituksena oli tutkia pedagogista näkökulmaa kommunikatiiviseen kielitaitoon, joka on syrjäyttämässä vanhaa kielikäsitystä kielestä pelkkänä sanoista ja rakenteista rakentuvana systeeminä. Tutkimuksen tarkoituksena oli myös erityisesti tarkastella, miten kommunikatiivisempi käsitys kielestä on vaikuttanut keskipitkän ruotsin ylioppilaskokeen kirjallisen osan sanasto- ja rakenneosion osatehtävään 2.2. Tutkimus on luonteeltaan kvalitatiivinen sisällönanalyysi. Tutkimieni ylioppilaskokeiden osatehtävät ovat vuosilta 2008–2014. Tutkimukseni tulokset osoittavat, että keskipitkän ruotsin ylioppilaskokeen osatehtävä 2.2 on kehittynyt kommunikatiivisempaan suuntaan, jolloin sen…