1,720,961 research outputs found
Toxic Dinoflagellates in the Mediterranean Sea.
No full textA review of the distribution of toxic dinoflagellates and related toxic events in the Mediterranean Sea is provided. Diarrhetic shellfish poisoning (DSP) and paralytic shellfish poisoning (PSP) are the main seafood contaminations, that have been reported since 1987. In 1994 four lethal cases for PSP were reported in Morocco. DSP seems to be restricted in the Northern part of the basin, while PSP contamination presents a wider distribution. Potentially DSP species, belonging to the genus Dinophysis, are widely distributed in the Mediterranean Sea, suggesting a wider extension of this contamination. The lack of monitoring programs in the Southern Mediterranean could be responsible of DSP overlooking. The species responsible for PSP are Gymnodinium catenatum in the Alboran Sea and Alexandrium minutum in various parts of the basin. Ichtyotoxic effects, due to Gymnodinium and Gyrodinium species, have been sporadically reported in some Mediterranean areas
Annual survey of planktonic dinoflagellates and related cysts in the Gulf of Trieste (Northern Adriatic Sea).
No full text
PHYTOPLANKTON DETECTION AND DSP TOXICITY - METHODOLOGICAL CONSIDERATIONS
No full textTwo different phytoplankton sampling methods (bottle and net sampling) were used to evaluate the concentration of toxic Dinophysis species in seawater and their correlation to mussel toxicity, assessed by mouse bioassay. Dinophysis concentration in net samples revealed the higher correlation to mussel toxicity (r = 0.75, p < 0.01). Net sampling therefore seems more suitable for the detection of low abundance species like Dinophysis characterised by vertical aggregations at different depths in the water column
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
- …
