scholarly journals Microcotyle visa n. sp. (Monogenea: Microcotylidae), a gill parasite of Pagrus caeruleostictus (Valenciennes) (Teleostei: Sparidae) off the Algerian coast, Western Mediterranean

2019 ◽  
Vol 96 (2) ◽  
pp. 131-147 ◽  
Author(s):  
Chahinez Bouguerche ◽  
Delphine Gey ◽  
Jean-Lou Justine ◽  
Fadila Tazerouti
Keyword(s):  
Western Mediterranean ◽  
Gill Parasite ◽  
Algerian Coast ◽  
Pagrus Caeruleostictus

Large boulder accumulation on the Algerian coast evidence tsunami events in the western Mediterranean

2009 ◽  
Vol 262 (1-4) ◽  
pp. 96-104 ◽  
Author(s):  
Said Maouche ◽  
Christophe Morhange ◽  
Mustapha Meghraoui
Keyword(s):  
Western Mediterranean ◽  
Algerian Coast

scholarly journals Inventory and the biogeographical affinities of Annelida Polychaeta in theAlgerian coastline (Western Mediterranean)

2020 ◽  
Vol 21 (1) ◽  
pp. 157
Author(s):  
ALI BAKALEM ◽  
PATRICK GILLET ◽  
JEAN-PHILIPPE PEZY ◽  
JEAN-CLAUDE DAUVIN
Keyword(s):  
Mediterranean Sea ◽  
World Ocean ◽  
Aegean Sea ◽  
Western Mediterranean ◽  
The Black Sea ◽  
Polychaete Species ◽  
Western Mediterranean Sea ◽  
Atlantic Origin ◽  
Algerian Coast ◽  
The Mediterranean

The data analyzed to inventory of all polychaetes in Algerian waters make it possible to estimate the diversity of this group to 534 species. The most diversified families are Syllidae (66 species), Spionidae (37 species) and Terebellidae (27 species).The presence of these listed species along the Algerian coast is compared with their occurrence in nine other areas of the Mediterranean Sea, in the Black Sea and in four other areas of the World Ocean. Comparison are also made with respect to the indications of the biogeographical origin for each species. The polychaete fauna of the Algerian coast is among the richest of the Mediterranean Sea and comparable to that reported for the French Mediterranean continental shelf  and the Aegean Sea, but higher that that found in the bordering coastlines of Morocco and Tunisia. Most of the species have an Atlantic origin and are present in the western Mediterranean Sea; this inventory includes eight Non-Indigenous Polychaete Species in the Algerian waters.

scholarly journals Parasite communities in two sparid fishes from the western Mediterranean: a comparative analysis based on samples from three localities off the Algerian coast

2017 ◽  
Vol 54 (1) ◽  
pp. 26-35 ◽  
Author(s):  
F. Benhamou ◽  
D. Marzoug ◽  
Z. Boutiba ◽  
A. Kostadinova ◽  
A. Pérez-Del-Olmo
Keyword(s):  
Feeding Habits ◽  
Parasite Community ◽  
Western Mediterranean ◽  
Parasite Communities ◽  
Composition And Structure ◽  
Algerian Coast ◽  
The Mediterranean ◽  
Boops Boops ◽  
Abundant Data ◽  
General Prediction

Summary We provide the first known comparative assessment of metazoan parasite communities in two taxonomically and ecologically related sparids, Boops boops and Spicara maena, that are common in the coastal infralittoral habitats in the Mediterranean. Using abundant data for infracommunities in three localities off the Algerian coasts of the Mediterranean, we tested the general prediction that the phylogenetic proximity of the two hosts, their overlapping geographical distribution and habitat occupation, as well as the similar feeding habits and diet would contribute to a homogenization of their parasite community composition and structure. The regional fauna of parasites of B. boops and S. maena along the Algerian coasts of the western Mediterranean was species-rich (36 species) and dominated by heteroxenous species (27 spp; of these 20 digenean spp.). The phylogenetic relatedness between the two hosts resulted in a large number of shared parasites (56 %, 20 spp.). However, the significant overlap in the parasite faunas of the two sparid hosts and their similar feeding habits and diet did not translate into homogeneous parasite community pattern; a significant differentiation in terms of both, composition and structure, was observed.

scholarly journals A new maximum length of the spotted weever, Trachinus araneus Cuvier, 1829 (Perciformes: Trachinidae) from Western Mediterranean (Oran Bay)

2020 ◽  
Vol 61 (2) ◽  
pp. 211-216
Author(s):  
Lotfi Bensahla-Talet ◽  
Ahmed Bensahla-Talet
Keyword(s):  
Mediterranean Basin ◽  
New Record ◽  
Western Mediterranean ◽  
Maximum Length ◽  
Total Length ◽  
Algerian Coast ◽  
The Mediterranean ◽  
The Mediterranean Basin

On the 29th of October 2018, one specimen of the spotted weever, Trachinus araneus measuring 47.3 cm in total length and weighting 968 g was captured by trammel net operating in Oran Bay (Kristel fishery) Western Algerian coast at 100 m depth. Up to date, this length is a new record of maximum length reached for this trachinid in the Mediterranean basin.

Holocene Paleoenvironments in the Western Mediterranean Sea: palynological evidences on the Algerian coast and climatic reconstructions

2020 ◽  
Author(s):  
Vincent Coussin ◽  
Aurelie Penaud ◽  
Nathalie Combourieu-Nebout ◽  
Odile Peyron ◽  
Yannick Miras ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Ocean Circulation ◽  
Environmental Changes ◽  
Regional Climate ◽  
Western Mediterranean ◽  
Climatic Conditions ◽  
Modern Analogue ◽  
Basin Scale ◽  
Algerian Coast ◽  
The Mediterranean

<p>Past and present oceanographic and climatic conditions along the Algerian coast involve complex mechanisms. Atlantic Ocean surface waters enter the Mediterranean Sea by the Gibraltar strait and become the Algerian current flowing along the North African coast forming a succession of eddies. Deep-water upwelling plumes is another recurrent feature of the ocean circulation along the Algerian margin. Past vegetation changes and the role of paleohydrological changes have been poorly described in this region. This work combines palynological (pollen and dinoflagellate cysts) and biomarker data to assess changing environmental and climatic conditions over the past 14 ka BP (late glacial and Holocene) acquired from the marine core MD04-2801 (Algerian coast, 2067 m water depth, Prisma cruise).</p><p>A total of 79 samples have been analyzed over the last 14 000 years BP. Palynological and organic biomarker proxy data were used to investigate the links between past sea surface temperature (SSTs) and hydrological changes on the observed regional environmental changes documented at centennial timescale resolution. Our data indicate (i) recurrent upwelling cells during relatively dry climatic conditions of the Younger Dryas (12.7 to 11.7 ka BP), the Early Holocene (11.7 to 8.2 ka BP) and from 6 ka BP onwards, (ii) an increase of fluvial discharges between 8.2 and 6 ka BP during the African Humid Period, and the concomitant colonization of coastlands by the Mediterranean forest. The comparison between our results and other western Mediterranean palynological records underlines the singularity of our results along the Algerian margin in terms of dinocyst assemblages and notably the over-representation of heterotrophic taxa. Palynological data shows direct links between continental dryness and marine hydrological conditions. Finally, we applied the Modern Analogue Technique to our pollen assemblages along the core in order to reconstruct seasonal and annual precipitations and temperatures and compare our local climatic patterns to regional climate signals at basin scale for the Holocene period.</p>

scholarly journals First study of sea turtle strandings in Algeria (western Mediterranean) and associated threats: 2016–2017

Herpetozoa ◽  
2020 ◽  
Vol 33 ◽  
pp. 113-120
Author(s):  
Alae Eddine Belmahi ◽  
Youcef Belmahi ◽  
Mouloud Benabdi ◽  
Amaria Latefa Bouziani ◽  
Samira Ait Darna ◽  
...  
Keyword(s):  
Chelonia Mydas ◽  
Sea Turtle ◽  
Western Mediterranean ◽  
Dermochelys Coriacea ◽  
Adult Size ◽  
The West ◽  
Loggerhead Sea Turtle ◽  
Leatherback Turtle ◽  
Loggerhead Turtles ◽  
Algerian Coast

Between December 2015 and December 2017 a total of 63 sea turtles were recorded as being stranded along the Algerian coast. The loggerhead sea turtle Caretta caretta was the most commonly stranded species (n = 44) (69.8%), followed by the leatherback Dermochelys coriacea (n = 18) (28.6%) and the green turtle Chelonia mydas (n = 1). There was a slight dominance of the adult size class for stranded loggerhead turtles, while, for the leatherback, late juveniles and adults prevailed. Most loggerhead turtles stranded during the summer months (July and August), whereas most leatherbacks stranded during winter. The breakdown of the strandings by region shows a slight dominance along the western and central shores for C. caretta and a clear dominance in the west for D. coriacea. The primary cause of death was determined in 50.8% of the stranded turtles. Regarding the evidence of interactions with humans the major cause of stranding in loggerhead turtles was incidental catch by artisanal fisheries, followed by boats’ collisions. The main causes of leatherback strandings were boats’ collisions. Algerian data show that human activities affect loggerhead turtles and also prove a significant presence of the leatherback turtle on this coast.

scholarly journals Seasonal variation of microplastics density in Algerian surface waters (South-Western Mediterranean Sea)

2021 ◽  
Author(s):  
SKANDER SETITI ◽  
BOUALEM HAMDI ◽  
SAFIA CHERNAI ◽  
FOUZIA HOUMA BACHARI ◽  
SAMIR BACHOUCHE ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Temporal Distribution ◽  
Western Mediterranean ◽  
Additional Information ◽  
Western Mediterranean Sea ◽  
Wide Range ◽  
Algerian Coast ◽  
Spatio Temporal ◽  
Few Data ◽  
Harmful Effects

Coastal waters worldwide are widely contaminated with various-size plastics, whose presence in aquatic ecosystems has been shown to produce a wide range of economic and social impacts and harmful effects on marine ecosystems. While microplastics have been reported from many regions of the Mediterranean Sea, very few data exist regarding microplastics concentration in Algerian waters. In this study, we used a Manta trawl (330 µm) at six sampling stations in Bou-Ismail Bay, Algeria (South-West Mediterranean Sea) in order to provide novel information about the occurrence and composition of microplastics along the Algerian coast. Sampling was performed seasonally at six different sampling stations in 2018, providing additional information about the spatio-temporal variability of microplastics concentrations at the sea surface. Microplastics were found in all collected samples, with highly variable concentrations of 0.95, 0.88, 1.26, and 0.36 items/m3 in Autumn, Winter, Spring and Summer, respectively, and an overall mean concentration of 0.86 ± 0.35 items/m3. A classification based on the shape and appearance of microplastics indicated the predominance of fibers (32%), followed by fragments (27%), films (16%), foams (13%), and granules (12%). A qualitative microplastics analysis through Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR) revealed that microplastics were mainly composed of polyethylene (68.2%), polypropylene (24.7%), polystyrene (4.1%) and other polymers (3%). These data provide an initial overview of the quantity, characteristics, and spatio-temporal distribution of floating microplastics in Bou-Ismail Bay (Algeria).

Pollutant lad sources and deposition in the Western Mediterranean

2003 ◽  
Vol 107 ◽  
pp. 875-878 ◽  
Author(s):  
J. Miralles ◽  
O. Radakovitch ◽  
A. Véron ◽  
J. K. Cochran ◽  
P. Masqué ◽  
...  
Keyword(s):  
Western Mediterranean
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