Search results for "TYRRHENIAN SEA"

showing 9 items of 59 documents

SPATIAL DISTRIBUTION OF DENDROPOMA CRISTATUM (MOLLUSCA, GASTROPODA) ADULT BIOMASS ON A VERMETID REEF

2023

A spatial characterization of Dendropoma cristatum biomass was carried out on a Vermetid reef in north-western Sicily. Biomass distribution of adult specimens is not homogenous in the different areas of the reef, with an increasing trend from the inner edge to the outer edge, while the central pool supports intermediate values of vermetid biomass. Considering the entire reef area, the cuvette has the highest Dendropoma biomasses of the bioconstruction, even if the highest surface-biomass ratio is found in the outer edege.

biomass Dendropoma cristatum Vermetid reef Tyrrhenian Sea
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The operational sex ratio of the sea urchin Paracentrotus lividus populations: the case of the Mediterranean marine protected area of Ustica Island (…

2009

We investigated, with a series of field and laboratory observations, the possible effect of the starfish Marthasteria glacialis predation on the operational sex ratio (OSR), i.e. the number of sexually mature males divided by the total number of sexually mature adults of both sexes at any one time, of the edible sea urchin Paracentrotus lividus. The OSR was estimated three times during the sea urchin summer spawning period (July 2004, June 2005 and July 2006) on barren substrates of Ustica Island Marine Protected Area (Southern Tyrrhenian Sea, Italy). Four sites were selected: two characterized by high M. glacialis density (take zone C) and two controls with low starfish density (no-take zo…

echinoidEcologybiologyStarfishAquatic Sciencebiology.organism_classificationParacentrotus lividusPredationScuba divingFisherystarfishTyrrhenian Sea.biology.animalAdult sex ratioMarine protected areaOperational sex ratioSea urchinnatural predationEcology Evolution Behavior and SystematicsSex ratioMarine Protected Area
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Larval fish assemblages in the central Mediterranean Sea: spatio spatio-temporal dynamics and biological effect on early life stage of Sardinella aur…

geostrophic currentStrait of SicilyTyrrhenian Seamean daily growth; Strait of Sicily; Tyrrhenian Sea; Central Mediterranean Sea [Larval fish assemblages; Ekman transport; Lagrangian simulations; geostrophic currents; Sardinella aurita; otoliths microstructure analysis]Ekman transportLagrangian simulationSardinella auritaCentral Mediterranean SeaSettore BIO/05 - ZoologiaLarval fish assemblageotoliths microstructure analysis: mean daily growth
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First assessment of the epifauna associated with macroalgae of the vermetid reef along the coasts of Favignana Island (South Tyrrhenian Sea)

2017

With this study we provide a first baseline assessment of the epifauna associated with the macroalgae of the vermetid reefs present along the coasts of the Island of Favignana (Egadi Islands Marine Protected Area, Italy). A total of 14 taxa were identified. Epifaunal assemblages differed according to structure and composition of algal communities. The amphipod group presented the highest number of individuals. The tubicolous species Ampithoe ramondi Audouin, 1826 (Ampithoidae) was the most abundant species.

macroalgaesouthern Tyrrhenian SeaSettore BIO/02 - Botanica Sistematicavermetid reef.Fauna biodiversitySettore BIO/05 - ZoologiaFavignana Island
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Submarine Slope Failures Along the Northern Sicilian Continental Margin (Southern Tyrrhenian Sea) and Possible Implications for Geo-Hazard

2013

Mass wasting and downslope movements are common processes that have contributed to shape the northern Sicilian continental margin (southern Tyrrhenian Sea) since the Late Quaternary. Nevertheless, processes controlling their evolution are still partially unknown and a variety of geologic factors can be responsible for their formation. In this work we present an overview of the main mass wasting features (submarine canyons, landslides, debris flows) observed and mapped in different sectors of the northern Sicilian margin. The margin is characterized by a narrow, steep continental shelf (1-2°) and a very irregular and steep (6-8°) upper slope. The main aims of this work are: (1) to outline th…

southern Tyrrhenian Seageographygeography.geographical_feature_categorySettore GEO/02 - Geologia Stratigrafica E SedimentologicaLandslideSubmarine canyonMass wastingsubmarine slope failurelanguage.human_languagePaleontologyTectonicsContinental marginlanguageSubmarine pipelineQuaternaryslope failure swath bathymetry geohazard southern Tyrrheniangeo-hazardSicilianGeomorphologyGeology
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Submarine canyon of the north-western Sicilian offshore (Southern Tyrrhenian Sea): variability in morphologies, sedimentary processes and tectonic se…

2013

southern Tyrrhenian Seasubmarine canyonSettore GEO/02 - Geologia Stratigrafica E Sedimentologicamarine geomorphology
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Movement pattern of spawners of white seabream, Diplodus sargus sargus (Linnaeus, 1758), in the gulf of Castellammare (NW Sicily)

2011

ultrasonic telemetry movement pattern white seabream spawning season Tyrrhenian Sea
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Morphological and structural analysis of the Ustica Island offshore (southern Tyrrhenian Sea) for the definition of the marine geological hazard

2008

ustica island multibeam echosounder volcanism southern tyrrhenian sea submarine geomorphology
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Relazioni tra parametri biometrici in Marthasterias glacialis (L.) (Asteroidea)

2013

Biometric parameters of the Asteroid echinoderm Marthasterias glacialis (L.) were measured at Ustica Island MPA (SW Tyrrhenian Sea). Wet weight was correlated with tip-to-tip (arm-span) diameter, central disk, arm length, arm width and arm height. Results show high positive correlation between weight and arm height, suggesting a new useful method to estimate starfish size also for in situ measurements.

weight-morphometry relationships Asteroidea Marthasterias glacialis Tyrrhenian Sea
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