Search results for "Otus"
showing 10 items of 567 documents
The test skeletal matrix of the black sea urchin Arbacia lixula
2015
11 pages; International audience; In the field of biomineralization, the past decade has been marked by the increasing use of high throughput techniques, i.e. proteomics, for identifying in one shot the protein content of complex macromolecular mixtures extracted from mineralized tissues. Although crowned with success, this approach has been restricted so far to a limited set of key-organisms, such as the purple sea urchin Strongylocentrotus purpuratus, the pearl oyster or the abalone, leaving in the shadow non-model organisms. As a consequence, it is still unknown to what extent the calcifying repertoire varies, from group to group, at high (phylum, class), median (order, family) or low (g…
Changes in the proteome of sea urchin Paracentrotus lividus coelomocytes in response to LPS injection into the body cavity.
2020
Background The immune system of echinoderm sea urchins is characterised by a high degree of complexity that is not completely understood. The Mediterranean sea urchin Paracentrotus lividus coelomocytes mediate immune responses through phagocytosis, encapsulation of non-self particles, and production of diffusible factors including antimicrobial molecules. Details of these processes, and molecular pathways driving these mechanisms, are still to be fully elucidated. Principal findings In the present study we treated the sea urchin P. lividus with the bacterial lipopolysaccharide (LPS) and collected coelomocytes at different time-points (1, 3, 6 and 24 hours). We have shown, using label-free q…
Exploration of the Sea Urchin Coelomic Fluid via Combinatorial Peptide Ligand Libraries
2012
The urchin Paracentrotus lividus has been characterized via previous capture and enhancement of low-abundance proteins with combinatorial peptide ligand libraries (CPLL, ProteoMiner). Whereas in the control only 26 unique gene products could be identified, 82 species could be detected after CPLL treatment. Due to the overwhelming presence of two major proteins-the toposome (a highly glycosylated, modified calcium-binding, iron-less transferrin) and the major yolk proteins, belonging to the class of cell adhesion proteins-which constituted about 70% of the proteome of this biological fluid and strongly interfered with the capture of the minority proteome, no additional proteins could be dete…
Précisions sur la localité-type du campagnol des Pyrénées Microtus (Terricola) pyrenaicus (de Sélys Lonchamps, 1847) (Arvicolinae, Rodentia).
2010
2 pages; National audience; L'objectif de cette note est de préciser aussi exactement que possible la localité-type du campagnol des Pyrénées Microtus (Terricola) pyrenaicus (de Sélys Lonchamps, 1847) : montagnes des Pyrénées, Pic du Midi de Bigorre, à une grande altitude (Hautes-Pyrénées, France).
Analyse comparée des critères de la première molaire inférieure entre différentes populations du campagnol basque Microtus (Terricola) lusitanicus (G…
2009
9 pages; National audience; L'objectif de cette étude est l'analyse comparée des critères de la première molaire inférieure (M1) entre sept groupes géographiques du campagnol basque Microtus (Terricola) lusitanicus (Gerbe, 1879) répartis sur l'ensemble de l'aire de répartition de l'espèce. Le principal résultat est la différenciation du groupe des Pyrénées françaises, caractérisé en particulier par un développement réduit de la partie antérieure de la M1. Dans les groupes géographiques ibériques, des différences morphologiques sont trouvées pour chaque critère, mais ces différences sont moins significatives que celles observées pour le groupe des Pyrénées françaises. Le statut sub-spécifiqu…
RAPD (Random Amplified Polymorphic DNA) profiles distinguish Paracentrotus lividus populations living in a stressing environment (Amvrakikos Gulf, Gr…
2009
Random amplified polymorphic DNA (RAPD) analysis was performed to assess genetic markers of Paracentrotus lividus populations living in stressing environment in the Amvrakikos Gulf (Western Greece, Ionian Sea) where two populations distinguishable in body size, smaller than the open sea ones, were detected. The UPGMA dendrogram, constructed from pairwise . st values among population nuclear DNA markers, revealed that the small and medium-sized populations living inside the Amvrakikos presented a lower polymorphism, and form a cluster that shows the genetic distance with normal-sized populations (Ionian and Tyrrhenian Seas) living in open sea. AMOVA analysis indicated a genetic distance amon…
Helminth communities of owls (strigiformes) indicate strong biological and ecological differences from birds of prey (accipitriformes and falconiform…
2012
We compared the helminth communities of 5 owl species from Calabria (Italy) and evaluated the effect of phylogenetic and ecological factors on community structure. Two host taxonomic scales were considered, i.e., owl species, and owls vs. birds of prey. The latter scale was dealt with by comparing the data here obtained with that of birds of prey from the same locality and with those published previously on owls and birds of prey from Galicia (Spain). A total of 19 helminth taxa were found in owls from Calabria. Statistical comparison showed only marginal differences between scops owls (Otus scops) and little owls (Athene noctua) and tawny owls (Strix aluco). It would indicate that all owl …
Mussol banyut, Búho chico (VER0000124)
1932
Altres noms vulgars: Long-eared Owl (Anglès), Hibou moyen-duc (Francès), Waldohreule (Alemany) Gabinet de Vertebrats (Departament de Zoologia), Facultat de Ciències Biològiques (Campus de Burjassot), C/ Doctor Moliner, s/n, Bloque B. 5é plant, Burjassot (Valencia). Armari: 2-2 Alemania 00/00/1932 MachoHembra Adultos
“ANALISI DI NUOVI MECCANISMI MOLECOLARI DELLA RISPOSTA IMMUNITARIA INNATA NEL RICCIO DI MARE PARACENTROTUS LIVIDUS”
La risposta immune contro l’invasione dei patogeni è un meccanismo fisiologico presente in tutti gli organismi viventi. Gli animali possiedono recettori che si legano a elementi estranei riconosciuti come non-self che successivamente attivano una risposta cellulare. Il meccanismo di trasduzione del segnale inizia una complessa cascata di reazioni cellulari che conduce alla produzione di molecole effettrici quali le citochine. Alla fine si ha l’eliminazione o l’inattivazione del patogeno. A questo complesso meccanismo prendono parte recettori, molecole antimicrobiche, fattori di trascrizione, ecc… Gli echinodermi rappresentano i più evoluti invertebrati che formano un ponte con i cordati pri…
Root-induced decomposer growth and plant N uptake are not positively associated among a set of grassland plants
2007
Abstract It is known that plant species can induce development of different soil decomposer communities and that they differ in their influence on organic matter decomposition and N mineralization in soil. However, no study has so far assessed whether these two observations are related to each other. Based on the hypothesis that root-induced growth of soil decomposers leads to accelerated decomposition of SOM and increased plant N availability in soil, we predicted that (1) among a set of grassland plants the abundance of soil decomposers in the plant rhizosphere is positively associated with plant N uptake from soil organic matter. To test this, we established grassland microcosms consisti…