Cephalopods in the diet of young-of-the-year bluefin tuna (Thunnus thynnusL. 1758, Pisces: Scombridae) from the southern Tyrrhenian Sea (central Mediterranean Sea)

AbstractThe gilthead seabream, Sparus aurata, represents an important economic resource for Mediterranean aquaculture. In spite of its wide geographic distribution and economic importance, only recently studies have been carried out on the genetic composition of natural populations, which have revealed a picture of a heterogeneous degree of genetic differentiation among S. aurata populations. In this study an allozyme analysis of samples from six different collecting sites along the Italian and Croatian coasts was carried out, covering an area in the Central Mediterranean sea that has yet to be investigated through gene-enzyme systems. Data on 26 gene loci, 10 of which are polymorphic, indicate a slight but significant genetic structure (FST = 0.0167) of the species. A hierarchical analysis of population subdivision made it possible to identify three different assemblages found in the Adriatic Sea, Tyrrhenian Sea and Sardinian Channel, though an isolation by distance model can be rejected. The results are discussed in the light of previous literature and taking conservation into consideration.

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Feeding habits of the Atlantic bluefin tuna, Thunnus thynnus (L. 1758), in the central Mediterranean Sea (Strait of Messina)

Helgoland Marine Research ◽

10.1007/s10152-012-0307-2 ◽

2012 ◽

Vol 67 (1) ◽

pp. 97-107 ◽

Cited By ~ 43

Author(s):

Pietro Battaglia ◽

Franco Andaloro ◽

Pierpaolo Consoli ◽

Valentina Esposito ◽

Danilo Malara ◽

...

Keyword(s):

Mediterranean Sea ◽

Feeding Habits ◽

Bluefin Tuna ◽

Thunnus Thynnus ◽

Central Mediterranean ◽

Atlantic Bluefin Tuna ◽

Central Mediterranean Sea

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Wind Direction Data from a Coastal HF Radar System in the Gulf of Naples (Central Mediterranean Sea)

Remote Sensing ◽

10.3390/rs13071333 ◽

2021 ◽

Vol 13 (7) ◽

pp. 1333

Author(s):

Simona Saviano ◽

Giovanni Esposito ◽

Roberta Di Lemma ◽

Paola de Ruggiero ◽

Enrico Zambianchi ◽

...

Keyword(s):

Mediterranean Sea ◽

Wind Direction ◽

Radar System ◽

Hf Radar ◽

Small Scale ◽

Winter Period ◽

Tyrrhenian Sea ◽

Central Mediterranean ◽

Gulf Of Naples ◽

Central Mediterranean Sea

Results on the accuracy of SeaSonde High Frequency (HF) radar wind direction measurements in the Gulf of Naples (Southern Tyrrhenian Sea, Central Mediterranean Sea) are here presented. The investigation was carried out for a winter period (2th February–6th March) and for one summer month (August) of the reference year 2009. HF radar measurements were compared with in situ recordings from a weather station and with model data, with the aim of resolving both small scale and large scale dynamics. The analysis of the overall performance of the HF radar system in the Gulf of Naples shows that the data are reliable when the wind speed exceeds a 5 m/s threshold. Despite such a limitation, this study confirms the potentialities of these systems as monitoring platforms in coastal areas and suggests further efforts towards their improvement.

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Polychlorinated biphenyls and organochlorine pesticides in water and sediment from Volturno River, Southern Italy: occurrence, distribution and risk assessment

Environmental Sciences Europe ◽

10.1186/s12302-020-00408-4 ◽

2020 ◽

Vol 32 (1) ◽

Author(s):

Paolo Montuori ◽

Elvira De Rosa ◽

Pasquale Sarnacchiaro ◽

Fabiana Di Duca ◽

Donatella Paola Provvisiero ◽

...

Keyword(s):

Polychlorinated Biphenyls ◽

Mediterranean Sea ◽

Organochlorine Pesticides ◽

Risk Index ◽

Sediment Quality ◽

Tyrrhenian Sea ◽

Central Mediterranean ◽

Sediment Samples ◽

Central Mediterranean Sea ◽

Volturno River

Abstract Background To assess the Volturno River pollution and its environmental impact on the Tyrrhenian Sea (Central Mediterranean Sea) caused by Polychlorinated biphenyls (PCBs) and Organochlorine pesticides (OCPs), 32 PCBs and aldrin, α-BHC, β-BHC, δ-BHC, γ-BHC (lindane), 4,4′- DDD, 4,4′-DDE, 4,4′-DDT, dieldrin, endosulfan I, endosulfan II, endosulfan sulphate, endrin, heptachlor, heptachlor epoxide (isomer B) and methoxychlor have been selected and were analyzed in three different phases: dissolved phase (DP), suspended particulate matter (SPM) and sediments. PCBs and OCPs were extracted using an SPE column for the DP and glass fiber filter for SPM and sediment samples. Cleaned extracts were analyzed by gas chromatography with electron capture detector (ECD) and mass spectrometry (MS) detector for PCBs and OCPs, respectively. Results Pollutants discharges of PCBs and OCPs into the sea were calculated in about 106.9 kg year−1 (87.1 kg year−1 of PCBs and 19.7 kg year−1 of OCPs), showing that this river could be a major source of PCBs and OCPs pollution to the Central Mediterranean Sea. Total concentrations of PCBs ranged from 4.1 to 48.0 ng L−1 in water (sum of DP and SPM) and from 4.3 to 64.3 ng g−1 in sediment samples. The concentrations of total organochlorine pesticides (OCPs) obtained in water (sum of DP and SPM) ranged from 0.93 to 8.66 ng L−1 and from 0.52 to 9.89 ng g−1 in sediment samples. Principal component analysis shows that all PCB compounds are more likely to come from surface runoff than an atmospheric deposition. Conclusion The data show that higher levels of PCBs and OCPs were found in sediment samples than in DP and SPM samples, which are an indication of no fresh inputs of these compounds. Based on our results, unintentionally produced PCBs by industrial processes (and other processes) were considered to be the main sources of PCBs in Volturno River and Estuary sediments. Considering the Sediment Quality Guidelines (SQGs), the Ecological Risk Index (ERI), the Risk Quotient (RQ) and the USEPA Environmental Quality Standards (EQS), the Volturno River and its Estuary would be considered an area in which the integrity is possibly at risk.

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Calcareous nannofossil assemblages from the Central Mediterranean Sea over the last four centuries: the impact of the little ice age

Climate of the Past Discussions ◽

10.5194/cpd-6-817-2010 ◽

2010 ◽

Vol 6 (3) ◽

pp. 817-866 ◽

Cited By ~ 5

Author(s):

A. Incarbona ◽

P. Ziveri ◽

E. Di Stefano ◽

F. Lirer ◽

G. Mortyn ◽

...

Keyword(s):

Mediterranean Sea ◽

Little Ice Age ◽

Ice Age ◽

Tyrrhenian Sea ◽

Calcareous Nannofossil ◽

Central Mediterranean ◽

Decadal Scale ◽

Central Mediterranean Sea ◽

Sicily Channel ◽

The Impact

Abstract. We present decadal-scale calcareous nannofossil data from four short cores (Station 272, 37° 17' N, 12° 48' E, 226 m depth; St 342, 36° 42' N, 13° 55' E, 858.2 m depth; St 407, 36° 23' N, 14° 27' E, 345.4 m depth; C90-1M, 40° 36' N, 14° 42' E, 103.4 m depth) recovered in the central Mediterranean Sea (northern Sicily Channel and Tyrrhenian Sea), which, on the basis of 210Pb activity span the last 200–350 years. Assemblages are dominated by placoliths, mostly Emiliania huxleyi, while, at least in the Sicily Channel sediments, Florisphaera profunda was an important part of the coccolithophore community. The paleoenvironmental reconstruction, based on ecological preference of species and groups, suggests that the Tyrrhenian core C90-1M maintained higher productivity levels over recent centuries, with respect to the Sicily Channel sites, possibly because of more pronounced winter phytoplankton blooms, in agreement with modern primary productivity variations over the last ten years. The lowermost part of the record of one of the cores from the Sicily Channel, Station 407, which extends down to 1650 AD, is characterized by drastic changes in productivity. Specifically, below 1850 AD, the decrease in abundance of F. profunda and the increase of placoliths, suggest increased productivity. The chronology of this change is related to the main phase of the Little Ice Age, which might have impacted the hydrography of the southern coast of Sicily and promoted vertical mixing in the water column. The comparison with climatic forcings points out the importance of stronger and prolonged northerlies, together with decreased solar irradiance. The identification of the LIA in the northern Sicily Channel cover the Bond cycle BO that was missing in a previous study of Holocene climatic anomalies in the Sicily Channel. Finally, we suggest that major abundance changes in reworked nannofossil specimens, recorded in the Tyrrhenian core C90-1M, might be linked to variations in terrigenous supply from land. Paradoxically, higher amounts of reworking correspond to dry periods. We argue that soil and rock vulnerability is enhanced during times of prolonged drought and vegetation cover loss.

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