Copepod community structure related to environmental factors from a summer cruise in the Gulf of Gabès (Tunisia, eastern Mediterranean Sea)

2009 ◽  
Vol 90 (1) ◽  
pp. 145-157 ◽  
Author(s):  
Zaher Drira ◽  
Malika Belhassen ◽  
Habib Ayadi ◽  
Asma Hamza ◽  
Rafik Zarrad ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Mediterranean Sea ◽  
Eastern Mediterranean ◽  
Sampling Period ◽  
Trophic Levels ◽  
Copepod Community ◽  
Gulf Of Gabes ◽  
Small Copepod ◽  
Eastern Mediterranean Sea ◽  
Gulf Of Gabès

We studied the summer spatial distribution of the copepod community in both the neritic and oceanic areas of the Gulf of Gabès (Tunisia, eastern Mediterranean Sea) coupled with environmental factors. Copepods were the most abundant zooplankton throughout the sampling period, contributing 78% of the total zooplankton. A total of 14 copepod families were identified in all stations, with an overwhelming abundance of Acartiidae and Oithonidae (39.05 and 39.09% of total abundance, respectively). Abundance of Acartia clausi and chlorophyll-a concentrations were negatively correlated with salinity, suggesting that this species probably escaped the high coastal salinity (38 psu). Significant correlation determined between A. clausi and tintinnids at 50 m isobaths indicates that these planktonic ciliates probably served as a substantial food link towards higher trophic levels of this area. Conversely, Oithona nana which was well adapted to high chlorophyll-a concentrations and high salinity along the coast, showed significant correlations with Dictyochophyceae, Dinophyceae, Bacillariophyceae and Euglenophyceae, suggesting that this small copepod was capable of feeding on a wide selection of phytoplankton preys.

High-resolution numerical modelling of the barotropic tides in the Gulf of Gabes, eastern Mediterranean Sea (Tunisia)

2017 ◽  
Vol 129 ◽  
pp. 224-232 ◽  
Author(s):  
Achref Othmani ◽  
Béchir Béjaoui ◽  
Cristèle Chevalier ◽  
Dalila Elhmaidi ◽  
Jean-Luc Devenon ◽  
...  
Keyword(s):  
High Resolution ◽  
Numerical Modelling ◽  
Mediterranean Sea ◽  
Eastern Mediterranean ◽  
Gulf Of Gabes ◽  
Eastern Mediterranean Sea ◽  
Gulf Of Gabès

scholarly journals Synthesis review of the Gulf of Gabes (eastern Mediterranean Sea, Tunisia): Morphological, climatic, physical oceanographic, biogeochemical and fisheries features

2019 ◽  
Vol 219 ◽  
pp. 395-408 ◽  
Author(s):  
Béchir Béjaoui ◽  
Sana Ben Ismail ◽  
Achref Othmani ◽  
Olfa Ben Abdallah-Ben Hadj Hamida ◽  
Cristèle Chevalier ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Eastern Mediterranean ◽  
Gulf Of Gabes ◽  
Eastern Mediterranean Sea ◽  
Gulf Of Gabès

The reproductive biology of the grey triggerfish Balistes capriscus (Pisces: Balistidae) in the Gulf of Gabès (south-eastern Mediterranean Sea)

2014 ◽  
Vol 94 (7) ◽  
pp. 1531-1537 ◽  
Author(s):  
Hichem Kacem ◽  
Lassâd Neifar
Keyword(s):  
Mediterranean Sea ◽  
Reproductive Biology ◽  
Eastern Mediterranean ◽  
Fork Length ◽  
Hepatosomatic Index ◽  
Gulf Of Gabes ◽  
Eastern Mediterranean Sea ◽  
South Eastern ◽  
Gulf Of Gabès ◽  
Balistes Capriscus

Fundamental information on the reproductive biology of the grey triggerfish Balistes capriscus from the Gulf of Gabès (south-eastern Mediterranean Sea) is based on 751 specimens, collected between June 2005 and May 2010, from commercial catches at different fishing ports at Chebba (34°14′N 11°06′E), Kerkennah (34°45′N 11°17′E) and Zarzis (33°41′N 11°48′E). The species were caught in this area using pelagic trawl nets. The calculation of the gonadosomatic index suggested that the spawning season of grey triggerfish occurred mainly between July and mid-September with a peak in July, coinciding with summer time. The first maturation occurred at 20.26 cm fork length for females and 21.3 cm fork length for males. The monthly values of hepatosomatic index and condition factor (K) indicated that the liver was the most severely stressed organ in the reproduction process of energy transfer. The absolute fecundity (F) ranged from 290,120 to 984,990 eggs per female. The fecundity of the species was determined by the size and weight of the individuals.

Ostreopsis cf. ovata in the Gulf of Gabès (south-eastern Mediterranean Sea): morphological, molecular and ecological characterization

Harmful Algae ◽  
2017 ◽  
Vol 63 ◽  
pp. 56-67 ◽  
Author(s):  
Moufida Abdennadher ◽  
Amel Bellaaj Zouari ◽  
Wafa Feki Sahnoun ◽  
Elsa Alverca ◽  
Antonella Penna ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Eastern Mediterranean ◽  
Gulf Of Gabes ◽  
Eastern Mediterranean Sea ◽  
South Eastern ◽  
Gulf Of Gabès

scholarly journals High diversified benthic habitats in a tidal Mediterranean sub-tropical environment: the case of the Gulf of Gabès (Tunisia)

2018 ◽  
Author(s):  
Abir Fersi ◽  
Nawfel Mosbahi ◽  
Ali Bakalem ◽  
Jean-Philippe Pezy ◽  
Alexandrine Baffreau ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Eastern Mediterranean ◽  
Tropical Environment ◽  
Gulf Of Gabes ◽  
Annual Cycles ◽  
Gulf Of Gabès ◽  
Zostera Noltei ◽  
Sediment Types ◽  
The Mediterranean ◽  
The Impact

The Gulf of Gabès on the southern coasts of Tunisia in the central part of the Mediterranean is a very shallow basin, characterized by semidiurnal tides, attaining a range of 2.3 m during spring tides. The intertidal zone was covered by extended Zostera (Zosterella) noltei Hornemann, 1832 beds mainly developed around the Kneiss Islands while tidal channels ensured the water circulation in this sub-tropical environment with very low freshwater input and high summer temperature. In spite of protected conventions, the area remained under high human pressures: overfishing, and the impact of the pollution of the phosphate industry. Intensive sampling in both intertidal and shallow subtidal zones during annual cycles permitted to identify a rich macrofauna which increase considerably the species known in this eastern part of the Mediterranean Sea. More than 50 species are added for the Tunisian fauna. Moreover, patterns of diversity are analysed with the sediment types, presence or absence of Zostera noltei seagrass bed, and human pressures. The list of the collected species are compared with those of surrounding areas in both Western and Eastern Mediterranean Sea.

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