New record of a sharpnose sevengill sharkHeptranchias perlo(Elasmobranchii, Hexanchidae) from the Balearic Sea, western Mediterranean Sea

2019 ◽  
Vol 94 (3) ◽  
pp. 526-531
Author(s):  
Javier Guallart ◽  
Gabriel Morey ◽  
Àlex Bartolí
Keyword(s):  
Mediterranean Sea ◽  
New Record ◽  
Western Mediterranean ◽  
Western Mediterranean Sea ◽  
Balearic Sea

scholarly journals NEW RECORD OF GIANT DEVIL RAY (CHONDRICHTHYES: MYLIOBATIDAE) FROM ORAN BAY (WESTERN MEDITERRANEAN SEA)

2019 ◽  
Vol 25 (1) ◽  
pp. 55
Author(s):  
Kais Boumedienne HUSSEIN ◽  
Lotfi Bensahla Talet
Keyword(s):  
Mediterranean Sea ◽  
New Record ◽  
Iucn Red List ◽  
Western Mediterranean ◽  
Red List ◽  
Western Mediterranean Sea ◽  
Maritime Traffic ◽  
Disc Width ◽  
First Time

The present paper reports a new record of Giant devil ray Mobula mobular (Bonnaterre, 1788) from western Algerian waters that is encountered for the first time in that coast since its first description in 1901 and last observation in late 80’s. This elasmobranch is categorized as endangered on the IUCN Red List (Endangered A2d ver 3.1) and is likely to be the rarest of the nine species of Mobula genus. Occasionally it is captured in Mediterranean Sea by purse seines, bottom and pelagic trawls, pelagic nets, bottom longlines, drifters and harpoons. The specimen stranded in “la Madrague Beach” in Western Algerian coasts. Its disc length was measuring 108.96 cm and disc width was 226.02 cm. This Myliobatidae is rarely seen with daily landed fish at Oran fishery. Up to date no explicit reason can be given for the strand of M. mobular but ghost fishing and important maritime traffic stay the most plausible cause of this incident.

Occurrence of Anisakis and Hysterothylacium larvae in commercial fish from Balearic Sea (Western Mediterranean Sea)

2018 ◽  
Vol 117 (12) ◽  
pp. 4003-4012 ◽  
Author(s):  
Elena Barcala ◽  
Andrea Ramilo ◽  
Nieves Ortega ◽  
Gabriela Picó ◽  
Elvira Abollo ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Western Mediterranean ◽  
Commercial Fish ◽  
Western Mediterranean Sea ◽  
Balearic Sea

scholarly journals Hydrological variations of the intermediate water masses of the western Mediterranean Sea during the past 20 ka inferred from neodymium isotopic composition in foraminifera and cold-water corals

2017 ◽  
Vol 13 (1) ◽  
pp. 17-37 ◽  
Author(s):  
Quentin Dubois-Dauphin ◽  
Paolo Montagna ◽  
Giuseppe Siani ◽  
Eric Douville ◽  
Claudia Wienberg ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Mediterranean Sea ◽  
Water Depth ◽  
Cold Water ◽  
Western Mediterranean ◽  
Intermediate Water ◽  
Western Mediterranean Sea ◽  
Deep Waters ◽  
Balearic Sea ◽  
Intermediate Waters

Abstract. We present the neodymium isotopic composition (εNd) of mixed planktonic foraminifera species from a sediment core collected at 622 m water depth in the Balearic Sea, as well as εNd of scleractinian cold-water corals (CWC; Madrepora oculata, Lophelia pertusa) retrieved between 280 and 442 m water depth in the Alboran Sea and at 414 m depth in the southern Sardinian continental margin. The aim is to constrain hydrological variations at intermediate depths in the western Mediterranean Sea during the last 20 kyr. Planktonic (Globigerina bulloides) and benthic (Cibicidoides pachyderma) foraminifera from the Balearic Sea were also analyzed for stable oxygen (δ18O) and carbon (δ13C) isotopes. The foraminiferal and coral εNd values from the Balearic and Alboran seas are comparable over the last  ∼  13 kyr, with mean values of −8.94 ± 0.26 (1σ; n =  24) and −8.91 ± 0.18 (1σ; n =  25), respectively. Before 13 ka BP, the foraminiferal εNd values are slightly lower (−9.28 ± 0.15) and tend to reflect higher mixing between intermediate and deep waters, which are characterized by more unradiogenic εNd values. The slight εNd increase after 13 ka BP is associated with a decoupling in the benthic foraminiferal δ13C composition between intermediate and deeper depths, which started at  ∼  16 ka BP. This suggests an earlier stratification of the water masses and a subsequent reduced contribution of unradiogenic εNd from deep waters. The CWC from the Sardinia Channel show a much larger scatter of εNd values, from −8.66 ± 0.30 to −5.99 ± 0.50, and a lower average (−7.31 ± 0.73; n =  19) compared to the CWC and foraminifera from the Alboran and Balearic seas, indicative of intermediate waters sourced from the Levantine basin. At the time of sapropel S1 deposition (10.2 to 6.4 ka), the εNd values of the Sardinian CWC become more unradiogenic (−8.38 ± 0.47; n =  3 at  ∼  8.7 ka BP), suggesting a significant contribution of intermediate waters originated from the western basin. We propose that western Mediterranean intermediate waters replaced the Levantine Intermediate Water (LIW), and thus there was a strong reduction of the LIW during the mid-sapropel ( ∼  8.7 ka BP). This observation supports a notable change of Mediterranean circulation pattern centered on sapropel S1 that needs further investigation to be confirmed.

scholarly journals NEW RECORD OF THE ATLANTIC POMFRET Brama brama (Bonnaterre, 1788) (SCOMBRIFORMES: BRAMIDAE) FOR GHAZAOUET BAY, WESTERN MEDITERRANEAN SEA

2020 ◽  
Vol 30 (2) ◽  
Author(s):  
Lotfi Bensahla-Talet
Keyword(s):  
Mediterranean Sea ◽  
Standard Length ◽  
New Record ◽  
First Record ◽  
Western Mediterranean ◽  
Maximum Length ◽  
Migratory Species ◽  
Western Mediterranean Sea ◽  
The Mediterranean

ABSTRACTThe present paper reports the first record of the Atlantic pomfret Brama brama for western Algerian waters in the Western Mediterranean Sea. It is a high migratory species, rarely met in Algerian fisheries. One specimen of B. brama was caught by a seiner operating in Ghazaouet Bay on September 6th 2018, measuring 672.5 mm of standard length (SL), and weighting 4,740 grams (g), constituting the new maximum length recorded for the species in the Mediterranean Sea. Accordingly, we describe biometrical and meristic characteristics, literature, databases and fish collections review of this bramid, firstly record for the Algerian waters. ResumoO presente artigo consiste no primeiro registro da da espécie palombeta Brama brama para a águas do mar Mediterrâneo ocidental na Argélia. É uma espécie altamente migratória, mas raramente encontrada nas peixarias da Argélia. Um espécime de B. brama foi capturado por um pescador que operava na Baíade Ghazaouet em setembro 2018, o exemplar obtido mediu 672,5 mm de comprimento padrão e pesou 4.740 g, constituindo no novo comprimento máximo registrado para a espécie no mar Mediterrâneo. Desta forma, apresentamos as características biométricas e merísticas, revisão de literatura, bancos de dados e revisão de coleções do primeiro registro dessa espécie de bramídico em águas argelinas.Palavras-chave: Argélia; Bramídeo; Morfometria; Nova ocorrência.

scholarly journals Parasites of the head of Scomber colias (Osteichthyes: Scombridae) from the western Mediterranean Sea

2014 ◽  
Vol 59 (1) ◽  
Author(s):  
Salvatore Mele ◽  
Maria Pennino ◽  
Maria Piras ◽  
José Bellido ◽  
Giovanni Garippa ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Eastern Mediterranean ◽  
Western Mediterranean ◽  
Parasite Fauna ◽  
Point Of View ◽  
Published Data ◽  
Multivariate Techniques ◽  
Western Mediterranean Sea ◽  
Scomber Colias ◽  
Non Parametric

AbstractThe metazoan parasite assemblage of the head of 30 specimens of the Atlantic chub mackerel (Scomber colias) from the western Mediterranean Sea was analysed. Eight species of parasites were found, four mazocraeid monogeneans: Grubea cochlear (prevalence = 10%), Kuhnia scombercolias (59%), K. scombri (52%), Pseudokuhnia minor (86%); three didymozoid trematodes: Nematobothrium cf. faciale (21%), N. filiforme (41%), N. scombri (7%); and one laerneopodid copepod: Clavelissa scombri (7%). Results were compared with previously published data from 14 localities of the eastern Mediterranean Sea and the Atlantic Ocean, using non-parametric univariate and multivariate analyses, and the whole parasite fauna of S. colias was compared with that of the congeners (S. australasicus, S. japonicus and S. scombrus). Parasites showed to reflect the biogeographical and phylogenetic history of host. From a methodological point of view, the use of both non-parametric univariate and multivariate techniques proved to be effective tools to detect dissimilarities between parasite assemblages.

scholarly journals Dynamical Downscaling of ERA5 Data on the North-Western Mediterranean Sea: From Atmosphere to High-Resolution Coastal Wave Climate

2021 ◽  
Vol 9 (2) ◽  
pp. 208
Author(s):  
Valentina Vannucchi ◽  
Stefano Taddei ◽  
Valerio Capecchi ◽  
Michele Bendoni ◽  
Carlo Brandini
Keyword(s):  
Mediterranean Sea ◽  
Wind Wave ◽  
Dynamical Downscaling ◽  
Wave Climate ◽  
Western Mediterranean ◽  
Limited Area ◽  
Computational Domain ◽  
Wave Hindcast ◽  
The North ◽  
Western Mediterranean Sea

A 29-year wind/wave hindcast is produced over the Mediterranean Sea for the period 1990–2018. The dataset is obtained by downscaling the ERA5 global atmospheric reanalyses, which provide the initial and boundary conditions for a numerical chain based on limited-area weather and wave models: the BOLAM, MOLOCH and WaveWatch III (WW3) models. In the WW3 computational domain, an unstructured mesh is used. The variable resolutions reach up to 500 m along the coasts of the Ligurian and Tyrrhenian seas (Italy), the main objects of the study. The wind/wave hindcast is validated using observations from coastal weather stations and buoys. The wind validation provides velocity correlations between 0.45 and 0.76, while significant wave height correlations are much higher—between 0.89 and 0.96. The results are also compared to the original low-resolution ERA5 dataset, based on assimilated models. The comparison shows that the downscaling improves the hindcast reliability, particularly in the coastal regions, and especially with regard to wind and wave directions.

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