Search results for "mediterranean sea."
showing 10 items of 830 documents
Growth of citrus production among the Euro-Mediterranean countries: political implications and empirical findings
2013
The agricultural matter has always played an important role in holding back the Euro-Mediterranean integration process due to the strong complementarity of the agricultures of the coastal countries which share excellent products including citrus fruits. The main goal of this paper is to understand the growth dynamics of the citriculture in the countries bordering the Mediterranean Sea. Through the application of the dynamic formulation of the Shift and Share Analysis it has been possible to analyse the trend of the amount of harvested citrus production, in physical and economic terms, in the last fifteen years, and above all which components, structural and competitive, have mainly influenc…
Occurrence of Edwardsiella tarda in wild European eels Anguilla anguilla from Mediterranean Spain
2007
Pure cultures of Edwarsiella tarda were isolated from body ulcers and internal organs of wild European eels caught in a Mediterranean freshwater coastal lagoon (Albufera Lake, Valencia, Spain) over a 1 yr period. Overall, the E. tarda isolation rate from wild eels was 9%, but this increased to 22.8% in diseased individuals. All 22 E. tarda isolates belonged to the 'wild-type' biogroup of the species and were virulent for eels (lethal dose that kills 50% of exposed individuals [LD50 dose]: 10(4.85) to 10(6.83) CFU ind.(-1)), and therefore represented the aetiological agent of the haemorrhagic disease observed in wild European eels. The E. tarda isolates and E. tarda CECT 894T type strain wer…
Shallow-water benthic hydroids from the Maltese Islands (Central Mediterranean)
2013
Forty species of benthic hydroids, belonging to 15 families and 21 genera, were found in a collection, obtained by SCUBA diving, from the Maltese Islands. Paradoxically for the well studied Mediterranean region, the hydroid fauna of these islands is virtually unexplored. Of 40 species, 33 were identified to species level, with 28 of them reported for the first time for the study area. Hydractinia monocarpa is recorded for the first time in the Mediterranean Sea, and a presumed new species of the genus Clytia has been found. The most speciose families are Campanulariidae with 10 species (25%), Aglaopheniidae with six species (15%) and Sertulariidae with five species (12%). Aglaophenia and Cl…
Political and economic fisheries management in the Channel of Sicily
2006
Fishery activities in the Mediterranean Sea are characterized by a number of distinctive features which include relative extension of national to international waters, straddling and shared stocks, overall characteristics of fishing activities, availability of scientific information and the absence of a policy fisheries management in many coastal States. Therefore, the principal objective of this paper is to portray a framework on the politics of management of the fish resources in the Channel of Sicily, by examining both the CFP in the Mediterranean or the Italian–Tunisian relationship, and then to inspect the fishing effort of the Sicilians and Tunisian productive structures to carry out …
Insular variation in central MediterraneanCrociduraWagler, 1832 (Mammalia, Soricidae)
1990
Morphometric variation of Crocidura mandible in Sicily and surrounding islands (Egadi archipelago, Ustica, Pantelleria and Gozo) was analyzed by principal component and canonical variate analyses in order to integrate recent chromosomal and biochemical observations. Specimens of C. suaveolens and C. leucodon from mainland Italy and of C. russula from Sardinia were used as reference in this analysis. The biometry of the only taxon of shrews living in Sicily is significantly different from the three reference samples. This result, coupled with a recently discovered new karyotype, provides strong evidence for a new Eurasian species, for which the name C. sicula Miller 1901, was chosen. Crocidu…
New records of marine Tardigrada in the Mediterranean Sea
1996
Abstract Meiofauna from Chafarinas archipelago (western Mediterranean, N. Africa) were studied, and marine Tardigrada were identified to species level. A total of 15 species, belonging to families Stygarctidae, Halechiniscidae (Subfamilies Halechiniscinae, Florarctinae, Styraconyxinae and Tanarctinae), Batillipedidae, and Echiniscoididae, were found for the first time from the Alboran Sea and southwestern Mediterranean area. Four species and one subspecies are new records for the Mediterranean Sea: Floractus acer , F. asper , F. stellatus , Actinarctus doryphorus and Echiniscoides sigismundi hispaniensis . The male of Floractus stellatus , previously unknown to science, is described. Many s…
Loss of Ostracoda biodiversity in Western Mediterranean wetlands
2008
1. The coastal area of Valencia (Spain) in the Western Mediterranean is rich in freshwater and brackish wetlands. These areas are mostly protected for bird conservation but are also highly affected by human impacts. Six shallow lakes located in Ramsar wetland sites of this area were studied in order to assess past and present ostracod biodiversity and relate it to the status of the lakes, taking into consideration the indicator value of these easily fossilizable crustaceans. 2. In all the wetlands studied, ostracod taphocoenoses showed much higher species richness than the corresponding biocoenoses. This is expected from the time accumulative character of the taphocoenosis, but the trend is…
Unveiling the Relationship Between Sea Surface Hydrographic Patterns and Tuna Larval Distribution in the Central Mediterranean Sea
2021
Thunnus thynnus (Atlantic bluefin tuna, ABT) and other tuna species reproduce in the Mediterranean Sea during the summer period. Despite the Central Mediterranean Sea, the Strait of Sicily in particular, being a key spawning site for many tuna species, little is known on the effects of oceanographic variability on their larval distribution in this area. The abundance and presence-absence of larval specimens for three tuna species (ABT, bullet tuna and albacore) were modeled in order to examine their relationships with environmental factors, by analysing historical in situ information collected during seven annual surveys (2010–2016). The results revealed that most tuna larvae for the three …
Pre-Messinian ecological diversity of Mediterranean sharks revealed by the study of their dermal denticles
2020
The Messinian salinity crisis (~5.59 Ma) is regarded as one of the most determining events for the recent evolutionary and palaeobiogeographic history of the Mediterranean biota. The impact of such episode has usually been assessed by evaluating the associated taxonomic turnover, however its consequences have rarely been interpreted from an ecological perspective. Here we assess the functional diversity of shark dermal denticles in a Serravallian locality from southeast Spain, providing a primary view into the pre-Messinian ecological diversity of shark communities from the Western Mediterranean. Our results reveal a high diversity of functional types of dermal denticles including dermal de…
Sea surface temperature and torrential rains in the Valencia region: modelling the role of recharge areas
2015
Abstract. Heavy rain events are frequently recorded in the Western Mediterranean causing economic losses and even human casualties. The Western Mediterranean is a deep and almost closed sea surrounded by high mountain ranges and with little exchange of water with the Atlantic ocean. A main factor in the development of torrential rains is ocean-atmosphere exchanges of heat and moisture that can potentially destabilize air masses travelling over the sea. The study of air mass trajectories previous to the rain event permits the identification of sea areas that could probably contribute to the development or intensification of rainfall. From a previous Mediterranean sea surface temperature clim…