scholarly journals Spatio-temporal changes of Munida Rutllanti Zariquiey-Alvarez, 1952 (Decapoda: Galatheidae) in the North-Western Ionian Sea (Central Mediterranean)

2013 ◽  
Vol 14 (3) ◽  
pp. 42 ◽  
Author(s):  
P. MAIORANO ◽  
F. CAPEZZUTO ◽  
G. D'ONGHIA ◽  
A. TURSI
Keyword(s):  
Sharp Decrease ◽  
Progressive Increase ◽  
Ionian Sea ◽  
Central Mediterranean ◽  
Widespread Occurrence ◽  
The North ◽  
Minimum Depth ◽  
Spatio Temporal ◽  
North Western ◽  
Over Time

The spatio-temporal pattern of Munida rutllanti distribution in the north-western Ionian Sea has been studied. Data were collected during 14 experimental trawl surveys conducted from 1997 to 2010 as part of the international MEDITS project. The hauls were carried out during day-light hours between depths of 10 and 800 m in the spring season. A progressive increase in the abundance index (N/km2) of M. rutllanti was observed from 2000 to 2008, then a sharp decrease was shown in the last two years. The greatest and lowest abundance indices were observed in the Apulian and central Calabrian sub-areas, respectively. The species was collected between 107 and 795 m in depth, with a significant increase and decrease over time in the maximum and minimum depth of finding, respectively. A highly significant increase over time in the mean carapace length was also observed in the whole study area. The widespread occurrence and increasing abundance of this species in the Ionian Sea could be related to the increase in temperature and the variation in hydrographic conditions which occurred in the Ionian basin during the EMT-BiOS phenomenon.

scholarly journals Deep-Water Cartilaginous Fishes in the Central Mediterranean Sea: Comparison between Geographic Areas with Two Low Impact Tools for Sampling

2021 ◽  
Vol 9 (7) ◽  
pp. 686
Author(s):  
Angela Carluccio ◽  
Francesca Capezzuto ◽  
Porzia Maiorano ◽  
Letizia Sion ◽  
Gianfranco D’Onghia
Keyword(s):  
Adriatic Sea ◽  
Fish Habitat ◽  
Conservation Status ◽  
Abundant Species ◽  
Cartilaginous Fish ◽  
Fish Diversity ◽  
Ionian Sea ◽  
Central Mediterranean ◽  
The North ◽  
North Western

Baited lander represents a low impact technique, an alternative to the traditional trawl sampling for collecting data on fish diversity and abundance, especially for threatened species such as Chondrichthyes living in sensitive habitats. In this study, distribution and abundance of cartilaginous fish were compared between two geographic areas, the southern Adriatic Sea and the north-western Ionian Sea, with two low impact sampling gears, an experimental bottom longline and a baited lander. Species diversity was evaluated by applying ecological indices and difference in mean abundances were tested using multivariate analysis. A total of 13 species of cartilaginous fish were collected. Significant differences in the assemblage recorded in the same area using different sampling tools were detected and no significant differences were detected among different areas explored with the same method. Using longline, the most abundant species collected in both areas was Galeus melastomus, while using lander, the most observed species were Dalatias licha in the southern Adriatic Sea and Hexanchus griseus in the north-western Ionian Sea. According to IUCN classification, of the 13 species collected, 2 are near threatened and 5 are threatened. A better governance of sensitive habitats coinciding with the essential fish habitat for these species would ensure them a better conservation status.

scholarly journals Ecosystem functioning of two marine food webs in the North‐Western Ionian Sea (Central Mediterranean Sea)

2019 ◽  
Vol 9 (18) ◽  
pp. 10198-10212 ◽  
Author(s):  
Pasquale Ricci ◽  
Simone Libralato ◽  
Francesca Capezzuto ◽  
Gianfranco D’Onghia ◽  
Porzia Maiorano ◽  
...  
Keyword(s):  
Food Webs ◽  
Mediterranean Sea ◽  
Ecosystem Functioning ◽  
Ionian Sea ◽  
Central Mediterranean ◽  
Marine Food Webs ◽  
The North ◽  
Central Mediterranean Sea ◽  
Marine Food ◽  
North Western

The demersal faunal assemblage of the north-western Ionian Sea (central Mediterranean): current knowledge and perspectives

2010 ◽  
Vol 26 (sup1) ◽  
pp. 219-240 ◽  
Author(s):  
P. Maiorano ◽  
L. Sion ◽  
R. Carlucci ◽  
F. Capezzuto ◽  
A. Giove ◽  
...  
Keyword(s):  
Current Knowledge ◽  
Ionian Sea ◽  
Faunal Assemblage ◽  
Central Mediterranean ◽  
The North ◽  
North Western

Spawning and recruitment ofPhycis blennoides(Phycidae) from the north‐western Ionian Sea (middle‐eastern Mediterranean)

1998 ◽  
Vol 65 (sup1) ◽  
pp. 203-209 ◽  
Author(s):  
Alfonso Matarrese ◽  
Gianfranco D'onghia ◽  
Mafalda Basanisi ◽  
Francesco Mastrototaro
Keyword(s):  
Eastern Mediterranean ◽  
Middle Eastern ◽  
Ionian Sea ◽  
The North ◽  
North Western

scholarly journals Modelling Local Patterns of Children Mortality. A Bayesian Spatio-Temporal Analysis.

2019 ◽  
Author(s):  
Alejandro Lome-Hurtado ◽  
Jacques Lartigue Mendoza ◽  
Juan Carlos Trujillo
Keyword(s):  
High Risk ◽  
Mortality Risk ◽  
Temporal Analysis ◽  
Health Concern ◽  
North West ◽  
The North ◽  
Policy Interventions ◽  
Medium Risk ◽  
Spatio Temporal ◽  
Over Time

Abstract Background: The number of death children at the international scale are still high, but with proper spatially-targeted health public policies this number could be reduced. In Mexico, children mortality is a particular health concern due to its alarming rate all throughout North America. The aims of this study are i) to model the change of children mortality risk at the municipality level, (ii) to identify municipalities with high, medium and low risk over time and (iii) to ascertain potential high-risk municipalities across time, using local trends of each municipality in Greater Mexico City. Methods: The study uses Bayesian spatio-temporal analysis to control for space-time patterns of data. This allow to model the geographical variation of the municipalities within the time span studied. Results: The analysis shows that most of the high-risk municipalities are in the north, west, and some in the east; some of such municipalities show an increasing children mortality risk over time. The outcomes highlight some municipalities which show a medium risk currently but are likely to become high risk along the study period. Finally, the odds of children mortality risk illustrate a decreasing tendency over the 7-year framework. Conclusions: Identification of high-risk municipalities may provide a useful input to policy-makers seeking out to reduce the incidence of children mortality, since it would provide evidence to support geographical targeting for policy interventions.

Tephrostratigraphy and tephrochronology of a 430 ka sediment record from the Fucino Basin, central Italy

2020 ◽  
Author(s):  
Niklas Leicher ◽  
Biagio Giaccio ◽  
Bernd Wagner ◽  
Giorgio Mannella ◽  
Lorenzo Monaco ◽  
...  
Keyword(s):  
Environmental History ◽  
Central Italy ◽  
Lacustrine Sediments ◽  
Global Scale ◽  
Early Pleistocene ◽  
Central Mediterranean ◽  
The North ◽  
Tephra Layers ◽  
Spatio Temporal ◽  
Fucino Basin

<p>The Fucino Basin is the largest and probably the only Central Apennine basin hosting a thick, continuous lacustrine sediment succession documenting the environmental history from the Early Pleistocene to recent historical times. The basin is located downwind of the Italian volcanic districts (< 150 km), which makes it the best candidate available in the central Mediterranean to construct a long and continuous tephrostratigraphic and tephrochronological record. Tephrostratigraphic investigations conducted on a first core (F1-F3) revealed 21 tephra layers of different Italian volcaoes. Among them several widespread and well-dated key Mediterranean marker tephra layers (e.g., Neapolitan Yellow Tuff, Y-1, Campanian Ignimbrite, Y-7, X-5, X-6, and Taurano Ignimbrite) were recognized and allowed to date, together with <sup>40</sup>Ar/<sup>39</sup>Ar ages directly obtained from the Fucino tephra layers, the record back to 190 ka.</p><p>Based on these promising results, a new drilling site with a lower sedimentation rate was targeted, bringing forth the ~98 m long F4-F5 record. In addition to the already recognised tephra layers occurring in the section that overlaps with core F1-F3, ~110 additional tephra and cryptotephra horizons were identified in the composite sediment succession of the F4-F5 record, providing new insights into the Italian volcanic history for the poorly explored interval beyond 200 ka.</p><p>Here we present the first tephrostratigraphic and tephrochronological results for this interval, which is dominated by eruptions from the Sabatini, Vulsini, Vico, and Colli Albani volcanoes. Several important known eruptions were identified and dated for the first time in distal settings: e.g., Canino (256.8 ± 1.1 ka), Tufo Giallo di Sacrofano (288.0 ± 2.0 ka), Magliano Romano Plinian Fall (315.0 ± 2.0 ka), Orvieto-Bagnoregio Ignimbrite (335.8 ± 1.4 ka), Villa Senni (367.5 ± 1.6 ka), Pozzolane Nere and its precursor (408.5 ± 1.3 ka, and 407.1 ± 4.2 ka, respectively). Finally, a tephra located at the base of the succession was directly dated by <sup>40</sup>Ar/<sup>39</sup>Ar at 424.3 ± 3.2 ka, thus extending the record back to the MIS 12/11 transition (~430 ka).</p><p>Ongoing geochemical analysis, including trace elements, Sr and Nd isotopes, and <sup>40</sup>Ar/<sup>39</sup>Ar dating of both Fucino tephra layers and potential proximal counterparts will help to reveal their volcanic sources and enable further tephrostratigraphic correlations supported by independent age determinations. These results will contribute towards an improved MIS 11-MIS 7 Mediterranean tephrostratigraphy, which is still poorly characterized and exploited.</p><p>The recognition and dating of the numerous tephra layers from the F4-F5 record can be directly combined to construct a comprehensive age-depth series of biogeochemical proxies and geomagnetic excursions derived from the lacustrine sediments, forming the backbone for an independent, radioisotopically anchored chronology for the F4-F5 multi-proxy record. Through paleoclimatic alignments and geomagnetic excursion synchronizations, the independent Fucino chronology can be propagated to the North Atlantic records, and possibly on a global scale, setting the framework for a better understanding of the spatio-temporal variability, magnitude, and different expressions of Quaternary orbital and millennial-scale paleoclimatic changes.</p>

scholarly journals Role of multifractal analysis in understanding the preparation zone for large size earthquake in the North-Western Himalaya region

2011 ◽  
Vol 18 (1) ◽  
pp. 111-118 ◽  
Author(s):  
S. S. Teotia ◽  
D. Kumar
Keyword(s):  
Western Himalaya ◽  
B Value ◽  
Great Earthquake ◽  
Kashmir Earthquake ◽  
The North ◽  
Large Size ◽  
Time Period ◽  
Spatio Temporal ◽  
Self Organised Criticality ◽  
North Western

Abstract. Seismicity has power law in space, time and magnitude distributions and same is expressed by the fractal dimension D, Omori's exponent p and b-value. The spatio-temporal patterns of epicenters have heterogeneous characteristics. As the crust gets self-organised into critical state, the spatio-temporal clustering of epicenters emerges to heterogeneous nature of seismicity. To understand the heterogeneous characteristics of seismicity in a region, multifractal studies hold promise to characterise the dynamics of region. Multifractal study is done on seismicity data of the North-Western Himalaya region which mainly involve seismogenic region of 1905 Kangra great earthquake in the North-Western Himalaya region. The seismicity data obtained from USGS catalogue for time period 1973–2009 has been analysed for the region which includes the October 2005 Muzafrabad-Kashmir earthquake (Mw =7.6). Significant changes have been observed in generalised dimension Dq, Dq spectra and b-value. The significant temporal changes in generalised dimension Dq, b-value and Dq−q spectra prior to occurrence of Muzaffrabad-Kashmir earthquake relates to distribution of epicenters in the region. The decrease in generalised dimension and b-value observed in our study show the relationship with the clustering of seismicity as is expected in self-organised criticality behaviour of earthquake occurrences. Such study may become important in understanding the preparation zone of large and great size earthquake in various tectonic regions.

Large-scale seasonal distribution of fin whales (Balaenoptera physalus) in the central Mediterranean Sea

2008 ◽  
Vol 88 (6) ◽  
pp. 1253-1261 ◽  
Author(s):  
Mehdi Aïssi ◽  
Antonio Celona ◽  
Giorgia Comparetto ◽  
Renata Mangano ◽  
Maurizio Würtz ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Western Mediterranean ◽  
High Abundance ◽  
Central Mediterranean ◽  
Balaenoptera Physalus ◽  
Feeding Ground ◽  
The North ◽  
Central Mediterranean Sea ◽  
Fin Whales ◽  
North Western

Fin whales (Balaenoptera physalus) are the only mysticete regularly found in the Mediterranean Sea. Its exceptional high abundance during the summer period in the north-western Mediterranean is essentially due to productive waters, but outside of this spatio-temporal window its distribution still remains quite unknown. This paper investigates the distribution of the fin whale on large-scales during the 2002–2006 period. Three areas of the central Mediterranean Sea were selected: the Ligurian Sea in the north-western Mediterranean belonging to the Pelagos Sanctuary; the area connecting both Mediterranean basins in the south-western Mediterranean, the Strait of Messina; and the waters surrounding the island of Lampedusa, in the central Mediterranean. Of the 41,270 km covered by the three surveys, a total of 98 sightings was recorded corresponding to 198 fin whales. Results display a year round distribution along synchronic seasonal dispatching, with a feeding behaviour occurrence in the northern part of the Pelagos Sanctuary during late spring and summer. They indicate high abundance in the Lampedusa area from late winter to early spring manifesting feeding activity. In the Strait of Messina, our results point out the importance of this area as a seasonal feeding ground and an important location for regular autumn transfers between both Mediterranean basins. According to the feeding ground in the two Mediterranean basins, whales change foraging strategy, one being single animals or animal pairs searching for prey in the water column while the other strategy is associated with more individuals feeding on the surface. The strategies differ also by their ecological conditions, such as depth affinity and shoreline distance.

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