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Abstract: The aim of the study was to investigate the distribution and population structure of three species of crabs (Decapoda: Crustacea), Medorippe lanata, Liocarcinus depurator and Liocarcinus vernalis for their biometric relationships. A total of 1100 specimens of three species were caught from waters off the northern Adriatic Sea in December 2013. Biometric relationships and condition factor (Fulton’s coefficient index) were measured for all the studied species. Size dimorphism was also observed in M. lanata with females showing significantly larger carapace size than males without significant difference in wet weight. The studied species did not differ significantly in the results of the condition index.
Keywords: biometry, condition factor, Adriatic Sea
Published in DiRROS: 31.07.2024; Views: 255; Downloads: 199
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Abstract: A specimen of Segeant major Abudefduf saxatilis (Linnaeus, 1758) was observed in a shallow rocky area for several weeks in August and September 2019 at Punta Sottile, in waters off Muggia (Gulf of Trieste). The specimen probably entered the Strait of Gibraltar and arrived at northernmost limits of the Adriatic Sea. This is the first record for this species in the Gulf of Trieste and also the Adriatic Sea.
Keywords: Sergeant major, damselfish, first record, Atlantic influx, Gulf of Trieste
Published in DiRROS: 31.07.2024; Views: 344; Downloads: 209
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Abstract: The phylum Bryozoa is one of the less studied macroinvertebrate groups in the Slovenian coastal sea. However, these animals play an important role in marine coastal ecosystems, especially as bioconstructors and filter feeders. Non indigenous species represent five to ten percent of all Mediterranean bryozoan species. In this paper, we present an updated list of non-indigenous or cryptogenic bryozoan species recorded in Slovenia. The list includes six species: Amathia verticillata, Bugula neritina s.l., Celleporaria brunnea, Tricellaria inopinata, Watersipora arcuata and Watersipora subtorquata with comments on their morphology, ecology and distribution in the Slovenian coastal sea. Introduction vectors and possible dispersal mechanisms are discussed, as well as methodological approaches and problematic areas as regards the study of non-indigenous bryozoans. Three species reported here, A. verticillata, C. brunnea and W. subtorquata, represent the first confirmed record from the Slovenian Sea
Keywords: non-indigenous species, Bryozoa, northern Adriatic Sea, harbour habitats, mussel farms, experimental plates
Published in DiRROS: 31.07.2024; Views: 265; Downloads: 211
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Abstract: Deterioration in heritage wood structures caused by wood-decay fungi is a worldwide concern. In the University of the Philippines Los Baños, decay fungi from wooden canopies of the Baker Memorial Hall were identified and its degrading ability was evaluated. Specimen collection was conducted on degraded canopies made of Mayapis (Shorea palosapis) with signs of white or green fungal growth. Fungi associated with the rotting symptoms were isolated, purified, characterized and identified. Colonies of fungal isolates were fast-growing in malt extract agar (MEA), with colony diameter reaching 5.60 % 0.43 cm (WRF8) and 5.15 % 0.25 cm (WRF5) after a day. Mycelia of isolates were hyaline and rhizoidal on water agar. Isolate WRF5 produced green, raised colonies that imparted yellow pigmentation on potato dextrose agar (PDA) and MEA. Generally, colonies were raised, radially striated with green center and white margin on PDA. Average length and width of WRF5 conidia were 3.19 % 0.33 %m and 2.73 % 0.36 %m, respectively. Cross-referencing morphological and cultural data with related literatures and identification keys indicated the isolated fungi were Trichoderma viride (WRF1), T. crassum (WRF3), T. reesei (WRF5), Rhizopus sp. (WRF8) and Coniophora sp. Furthermore, inoculation of 108 T. reesei conidia/mL on clean Mayapis wood blocks resulted to profuse fungal growth, with average weight loss recorded at 8.81 % 0.79% at 8 wks and 10.53 % 0.88% at 14 wks which indicated a considerable but slow wood degradation.
Published in DiRROS: 31.07.2024; Views: 256; Downloads: 160
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Abstract: Potato virus Y (PVY) is the most economically important potato virus, therefore extensive research is focusing on elucidation of its interaction with the host. To obtain repeatable results, strict standardization of research methods is crucial. Mechanical inoculation by rubbing sap from a PVY infected plant onto the leaf surface together with a fine abrasive powder is the most convenient way of experimental transmission of PVY to host plants. However, factors determining reproducibility of this process need to be determined. In the present study, it was shown that higher titre of the virus in the inoculum resulted in faster increase of PVYNTN RNA titre in the inoculated leaves, as well as in faster translocation of PVYNTN from inoculated leaves into upper non-inoculated leaves. The final titre of PVYNTN RNA in upper non-inoculated leaves was independent of the virus titre in the inoculum. In addition, the occurrence of the disease symptoms was followed and the dependence to the titre of the virus in the inoculum was observed.
Keywords: krompir, virus krompirja Y, mehanska inokulacija, titer virusa, inokulum, Potato virus Y, PVY, potato, mechanical inoculation, inoculum, virus titre, symptoms
Published in DiRROS: 31.07.2024; Views: 293; Downloads: 187
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