Changes in Atlantic Water characteristics in the south-eastern Mediterranean Sea as a result of natural and anthropogenic activities

Said, Mohamed Ahmed; Gerges, Makram A.; Maiyza, Ibrahim A.; Hussein, Maged; Radwan, Ahmed A.

doi:10.5697/oc.53-1.081

Cited by 10 publications

(9 citation statements)

References 11 publications

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“…It is connected to Atlantic Ocean through the narrow Gibraltar Strait, Kamel and Maiyza (2000). This Atlantic Water occupying the upper 200 m layer is likely to flow into Mediterranean Sea with its general salinity $36.0-36.5, Millot (2007) and Said et al (2011).…”

Section: Discussionmentioning

confidence: 99%

“…4, surface and 200 m depth. A higher surface water temperature was observed at longitudes 26°and latitude 30°E (16.6-18.5°C) with a general tendency to increase eastwards with lowest values (16.6-16.8°C) during the period 1959-2008, Said et al (2011). During winter 1971, the temperature varied between 15 and 18°C with maximum 17.8-18.0°C at stations located on the cross sections from Damitta to the Bay of El Salum, Al Kholy and El Wakeel (1975).…”

Section: Seawater Temperature and Salinitymentioning

confidence: 93%

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Comparative study of some physic-chemical parameters along Egyptian Mediterranean western coast, winter 2009 and 2010

Tadros

Radwan

Hemaida

et al. 2015

Egyptian Journal of Aquatic Research

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The present study aims to evaluate and compare the environmental parameters; temperature, salinity, dissolved oxygen (DO), oxidizable organic matter (OOM) and total alkalinity during winter 2009 and 2010 of the western Mediterranean coast of Egypt starting from El Mex to El Salum with three to four vertical stations being sampled at each marine sector. The surface distributions of both temperature and salinity decrease westwards during both winter seasons. The data revealed that, the total averages of temperature (except El Mex area) and dissolved oxygen during winter 2009 (16.6°C and 10.96 ml/l) in the studied marine sectors are higher than their corresponding values during winter 2010 (16.61°C and 5.81 ml/l) but an opposite trend is obtained with total averages of salinity (38.55 and 38.675) and total alkalinity (2.52 meq/l and 2.98 meq/l) measured during 2009 and 2010. The maximum average of oxidizable organic matter at El Hamam sector during winter 2009 was found to be 2.23 mgO 2 /l lower than its value during 2010 (2.72 mgO 2 /l), while an opposite result was obtained with the total average of OOM at El Salum sector. ª 2015 Hosting by Elsevier B.V. on behalf of National Institute of Oceanography and Fisheries. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Section: Discussionmentioning

confidence: 99%

Section: Seawater Temperature and Salinitymentioning

confidence: 93%

Comparative study of some physic-chemical parameters along Egyptian Mediterranean western coast, winter 2009 and 2010

Tadros

Radwan

Hemaida

et al. 2015

Egyptian Journal of Aquatic Research

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“…Where T is the annual mean water temperature of the Egyptian Mediterranean water and was sit as 21. 3 C º [41].…”

Section: Population Parameters and Managementmentioning

confidence: 99%

Stock Status of Pufferfish <i>Lagocephalus sceleratus</i> (Gmelin, 1789) Along the Egyptian Coast, Eastern Mediterranean Sea

Farrag¹

2015

AJLS

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Stock of pufferfish Lagocephalus sceleratus was evaluated using specimens that collected monthly from the commercial fishing boats at landing sites along whole the Egyptian Mediterranean coast during 2012. Specimens were ranged from 5 to 83cm (TL) in length with an average 43.01± 13.5cm and total weight from 2.1-5400g with an average of 1103.27±850.83 g. The length-weight relationship revealed negative allometric growth for males, females and combined sexes with insignificant difference between males and females at (P > 0. 05). The highest condition factor (1. 13) was recorded for immature/smaller fishes while the lowest value 0. 86 was recorded for largest female individual. Age determination by two methods (length frequency analysis and vertebrae) revealed seven years old with no significance difference between mean lengths at age of two methods at (P > 0. 05). Von Bertalanffy growth parameters for combined sexes of length frequency were L∞ = 106.34 cm, K = 0.17 year -1 and t o = 0.0228 year -1 , while they were L∞ = 101.63cm and K = 0.189 year -1 and t o = 0.1186 for vertebrae data. By using data of length frequency, the population parameters were, total mortality (Z=1. 01 year -1 ), natural mortality (M= 0. 347 year -1 ), fishing mortality (F= 0. 663 year) and exploitation ratio (E= 0. 657). The length at first capture (Lc) was 32. 34cm, while length at recruitment (Lr) was 25. 95cm. Yield per recruit (Y/R) at current parameters was 447.26g. The maximum sustainable yield per recruit (MSY) was 467. 42g, at fishing mortality (F MSY ) 0.403 year -1 Which is lower than current fishing mortality. The (Y/R) at the biological reference points (F 0. 1 & F max ) were 423.72 g and 467.42g respectively. The fishing mortalities at these points were 0. 203 year -1 and 0. 403 year -1 for F 0. 1 and Fmax respectively giving lower values than current fishing mortality reflecting over-exploitation status. Inspite of, the fishing of pufferfish is prohibited by the Egyptian law, its stock in the eastern Mediterranean is overexploited but still growing well and the younger individuals are in good condition reflecting a good adaptation in new habitat, and explain the illegal trade of this species in different markets. The over exploitation suggests reduce it or Y/R to level of F 0. 1 for the point of conservation regardless its poisonous effect. The importance of present data of such species could emphasis the need of special management plan for conserve and better use of economically valuable fishery resources.

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“…The water mass formation cycle is characterized by the inflow of low-salinity Atlantic Water (AW) in the upper 100 m of the water column and with identification values of S = 36.0-36.5 psu in the Strait of Gibraltar (Said et al, 2011), and a return flow of the salty Levantine Intermediate Water (LIW), formed in the Levantine Basin and positioned in the intermediate layer (typically at a depth of 200-600 m). The depth variability of the LIW salinity maximum is largely regional; generally, depths increase westward.…”

Section: Introductionmentioning

confidence: 99%

Hydrography in the Mediterranean Sea during a cruise with RV <i>Poseidon</i> in April 2014

Hainbucher

Cardín

Siena

et al. 2015

Earth Syst. Sci. Data

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Abstract. We report on data from an oceanographic cruise in the Mediterranean Sea on the German research vessel Poseidon in April 2014. Data were taken on a west-east section, starting at the Strait of Gibraltar and ending south-east of Crete, as well on sections in the Ionian and Adriatic Sea. The objectives of the cruise were threefold: to contribute to the investigation of the spatial evolution of the Levantine Intermediate Water (LIW) properties and of the deep water masses in the eastern Mediterranean Sea, and to investigate the mesoscale variability of the upper water column. The measurements include salinity, temperature, oxygen and currents and were conducted with a conductivity, temperature and depth(CTD)/rosette system, an underway CTD and an acoustic Doppler current profiler (ADCP). The sections are on tracks which have been sampled during several other cruises, thus supporting the opportunity to investigate the long-term temporal development of the different variables. The use of an underway CTD made it possible to conduct measurements of temperature and salinity with a high horizontal spacing of 6 nm between stations and a vertical spacing of 1 dbar for the upper 800 m of the water column. Data coverage and parameter measuredRepository reference:

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Changes in Atlantic Water characteristics in the south-eastern Mediterranean Sea as a result of natural and anthropogenic activities

Cited by 10 publications

References 11 publications

Comparative study of some physic-chemical parameters along Egyptian Mediterranean western coast, winter 2009 and 2010

Comparative study of some physic-chemical parameters along Egyptian Mediterranean western coast, winter 2009 and 2010

Stock Status of Pufferfish <i>Lagocephalus sceleratus</i> (Gmelin, 1789) Along the Egyptian Coast, Eastern Mediterranean Sea

Hydrography in the Mediterranean Sea during a cruise with RV <i>Poseidon</i> in April 2014

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Changes in Atlantic Water characteristics in the south-eastern Mediterranean Sea as a result of natural and anthropogenic activities

Cited by 10 publications

References 11 publications

Comparative study of some physic-chemical parameters along Egyptian Mediterranean western coast, winter 2009 and 2010

Comparative study of some physic-chemical parameters along Egyptian Mediterranean western coast, winter 2009 and 2010

Stock Status of Pufferfish &lt;i&gt;Lagocephalus sceleratus&lt;/i&gt; (Gmelin, 1789) Along the Egyptian Coast, Eastern Mediterranean Sea

Hydrography in the Mediterranean Sea during a cruise with RV &lt;i&gt;Poseidon&lt;/i&gt; in April 2014

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Product

Resources

About

Stock Status of Pufferfish <i>Lagocephalus sceleratus</i> (Gmelin, 1789) Along the Egyptian Coast, Eastern Mediterranean Sea

Hydrography in the Mediterranean Sea during a cruise with RV <i>Poseidon</i> in April 2014