Search results for "Fauna"
showing 10 items of 513 documents
Cuentas ibéricas sobre vértebras de pescado
2019
Dentro del proyecto de investigación HAR2013-45770-ACOMP/2015/256 revisamos un pequeño conjunto de cuentas hechas sobre vértebras de pescado. Las especies identificadas indican un uso secundario de este tipo de recursos. Within the framework of execution of the investigation project “Wood, Bone, Ivory, Antler and Shell. Marginal or marginalized crafts?” (HAR2013-45770-ACOMP/2015/256) we reviewed a small set of modified fish vertebrae from the Iberian period. The use of these objects was related as beads. They were always recognized as vertebrae of ichthyofauna remains, but in almost no case, the species to which they belonged had been identified, neither had they been treated jointly. Our p…
Characterisation of fascioliasis lymnaeid intermediate hosts from Chile by DNA sequencing, with emphasis on Lymnaea viator and Galba truncatula.
2011
In South America, Fasciola hepatica infection poses serious health problems in both humans and livestock. In Chile, the medical impact appears yearly stable and mainly concentrated in central regions, where the veterinary problem is highlighted by higher animal prevalences. Studies were undertaken by rDNA ITS-2 and ITS-1 and mtDNA cox1 sequencing to clarify the specific status of the lymnaeids, their geographical distribution and fascioliasis transmission capacity in Chile, by comparison with other American countries and continents. Results change the lymnaeid scenario known so far. The lymnaeid fauna of mainland Chile shows to be poor, including only two authochthonous species, Lymnaea via…
Augsnes makrofaunas struktūra Engures ezera ilgtermiņa ekoloģisko pētījumu parauglaukumos
2019
Bakalaura darba pētījums veikts Engures ezera dabas parks apkārtnes teritorijā. Darbā tika aprakstīta augsnes makrofauna un pētīta augsnes makrofaunas struktūra dažādos biotopos, ilgtermiņa ekoloģisko pētījuma parauglaukumos, kas ir izvēlēti Horizon 2020 projekta ILTER “Integrated European Long-Term Ecosystem and socio-ecological Research Infrastructure” izstrādē. Bakalaura darbā ir iekļauta vispārīga informācija par augsnes biotu. Ir arī precīza informācija par augsnes makrofaunu., kura tika konstatēta parauglaukumos. Darbā ir apkopota ievāktās makrofaunas daudzveidība un tās blīvumus augsnē. Pētījumā ir salīdzināta makrofaunas struktūra sešos biotopos gan ar līdzīgām, gan atšķirīgām īpašī…
Parameters Researches Regarding the Structural Parameters of the Populations of Rhynchitidae and Attelabidae in Romania
2012
The study of the two families took into account the economic factor, because there are not few species of Rhynchitidae and Attelabidae that produced important damages in the vine, orchard, and forest areas as well as in the agricultural cultures. The researches took place during 1996-2006. The fauna material was collected during the travels to different localities in the country. I n some investigated localities the collecting and the observations in the field were extended for at least 2 -3 days and for the vine ecosystems with a great attack of Byctiscus betulae the researches lasted for 3-4 years, at regulated intervals of 3-4 weeks. In order to establish the structural parameters there …
Understanding the Impact of Trampling on Rodent Bones
2022
Experiments based on the premise of uniformitarism are an effective tool to establish patterns of taphonomic processes acting either before, or after, burial. One process that has been extensively investigated experimentally is the impact of trampling to large mammal bones. Since trampling marks caused by sedimentary friction strongly mimic cut marks made by humans using stone tools during butchery, distinguishing the origin of such modifications is especially relevant to the study of human evolution. In contrast, damage resulting from trampling on small mammal fossil bones has received less attention, despite the fact that it may solve interesting problems relating to site formation proces…
Notes on Afrotropical Cydnidae (Heteroptera) with emphasis on vehicle-mounted net samples and description of a new species from Liberia, West Africa
2019
Notes on the Cydnidae fauna in Liberia, sampled with a vehicle-mounted net, the species taxonomy and general distribution are reported, including the description of Chilocoris elongatus sp. nov. In addition, new country records are provided for Angola, Ethiopia, Gabon, Guine a-Bissau, Namibia, Niger, Republic of South Africa, Sierra Leone, Tanzania, Togo, Uganda, and Zimbabwe.
Microsporidian disease of the invasive amphipod Dikerogammarus villosus and the potential for its transfer to local invertebrate fauna.
2012
12 pages; International audience; Invasive species may introduce novel pathogens to a colonised area. Most of the time emerging pathogens are detected a posteriori, but recognition of a priori emergence of an invasive disease by host shift may be useful for predictive purposes. Here, we studied if the microsporidian parasite Cucumispora dikerogammari infecting the invasive Ponto-Caspian amphipod Dikerogammarus villosus, has the potential to become an emergent disease in invaded rivers in Western and Central Europe. We first showed that this parasite decreases the survival of D. villosus in the later stages of infection development. However, the host reproduces earlier in response to the inf…
THE FRENCH NATIONAL SOIL QUALITY MONITORING NETWORK (RMQS) AS A SUPPORT FOR MONITORING SOIL BIODIVERSITY: past, present and future programs
2021
Soil biodiversity would represent about 25% of the species on Earth. It is threatened, and although it is essential for human activities, it remains largely unknown. The French National Soil Quality Monitoring Network (RMQS) has a significant impact in removing the grey areas through its programs on soil microorganisms, soil meso and macrofauna, meadow flora, truffles and more recently enzymatic activities. The first distribution maps of bacterial phyla on a national scale and of soil fauna on a regional scale (in Brittany) have been developed. For the white truffle, three new areas of presence have been identified in France. The habitats of the bacteria were also described for the first ti…
Biotic homogenisation in bird communities leads to large‐scale changes in species associations
2021
The impact of global change on biodiversity is commonly assessed in terms of changes in species distributions, community richness and community composition. Whether and how much associations between species are also changing is much less documented. In this study, we quantify changes in large-scale patterns of species associations in bird communities in relation to changes in species composition. We use network approaches to build three community-aggregated indices reflecting complementary aspects of species association networks. We characterise the spatio–temporal dynamics of these indices using a large-scale and high-resolution dataset of bird co-abundances of 109 species monitored for 17…
Is soil fauna an important driver of the structure and activities of denitrifier communities in tropical soils?
2007
International audience