Active faulting in the north-eastern Aegean Sea Islands

2013 ◽  
Vol 597-598 ◽  
pp. 106-122 ◽  
Author(s):  
A. Chatzipetros ◽  
A. Kiratzi ◽  
S. Sboras ◽  
N. Zouros ◽  
S. Pavlides
Keyword(s):  
Aegean Sea ◽  
Sea Islands ◽  
Active Faulting ◽  
The North ◽  
Eastern Aegean ◽  
North Eastern ◽  
Eastern Aegean Sea

Mercury and Po-210 in mollusc species in the island of Gökçeada in the north-eastern Aegean Sea: Bioaccumulation and risk assessment for human consumers

Chemosphere ◽  
2019 ◽  
Vol 235 ◽  
pp. 876-884 ◽  
Author(s):  
Murat Belivermiş ◽  
Önder Kılıç ◽  
Ebru Efe ◽  
Narin Sezer ◽  
Onur Gönülal ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Aegean Sea ◽  
The North ◽  
Eastern Aegean ◽  
North Eastern ◽  
Mollusc Species ◽  
Eastern Aegean Sea

scholarly journals North-eastern Aegean sea: an effort to estimate steady-state N & P budgets during September 1998

2002 ◽  
Vol 3 (1) ◽  
pp. 43 ◽  
Author(s):  
E. KRASAKOPOULOU ◽  
V. ZERVAKIS ◽  
E. SOUVERMEZOGLOU ◽  
D. GEORGOPOULOS
Keyword(s):  
Inorganic Nitrogen ◽  
Aegean Sea ◽  
Nitrogen And Phosphorus ◽  
The Past ◽  
The North ◽  
South Central ◽  
Eastern Aegean ◽  
North Eastern ◽  
Saline Waters ◽  
Eastern Aegean Sea

The north-eastern Aegean sea, characterised by a complex topographical structure, is the area where highly saline waters of Levantine and South-Central Aegean origin are diluted by the outflowing through the Dardanelles of less saline waters of Black Sea origin and by river runoff from the Greek and Turkish mainland. Salinity and nutrient data collected during the INTERREG-I project are used to develop budget calculations and empirical models according to the LOICZ biogeochemical modelling guidelines. The results of the study indicate that the dissolved inorganic nitrogen and phosphorus fluxes imported into the NE Aegean through the Dardanelles are less important than it was believed in the past. Overall, the system acts as a net sink of DIN and DIP, as well as being a net producer of organic matter, as primary production exceeds respiration. Moreover, the system appears to fix more nitrogen than is lost through denitrification.

Summer mesozooplankton assemblages in the north-eastern Aegean Sea: the influence of Black Sea water and an associated anticyclonic eddy

2010 ◽  
Vol 91 (1) ◽  
pp. 51-63 ◽  
Author(s):  
Stamatina Isari ◽  
Stylianos Somarakis ◽  
Epaminondas D. Christou ◽  
Nina Fragopoulu
Keyword(s):  
Sea Water ◽  
Aegean Sea ◽  
Anticyclonic Eddy ◽  
Mesozooplankton Community ◽  
Low Salinity ◽  
The North ◽  
Eastern Aegean ◽  
North Eastern ◽  
Layer 2 ◽  
Eastern Aegean Sea

The north-eastern Aegean Sea (NEA) is a marine system of high hydrological complexity, principally induced by the inflow and subsequent advection of the low salinity (<30) Black Sea water (BSW). This water mass occupies the upper layer (~0–20 m) of the NEA and plays a key role in the determination of circulation patterns and the generation of various frontal and eddy structures. Here we are concerned with the examination of mesozooplankton assemblages in the NEA during the thermal stratification period (July 2004) in two discrete sampling layers: (a) Layer 1 (from the base of halocline to the surface: ~0–20 m) which is directly influenced by BSW; and (b) the deeper ~20–50 m layer (Layer 2). Our main objective was to assess the response of mesozooplankton to the BSW and the associated hydrological structures. In July 2004, the BSW was mainly restricted in the eastern part of the NEA where it was entrapped in a ~50-km wide anticyclonic gyre (Samothraki gyre). A marked spatial differentiation in mesozooplankton assemblage structure, significantly related to this hydrodynamic partitioning, was detected in Layer 1. Sampling sites under the direct influence of low salinity–high temperature gyre waters were characterized by a considerably higher mesozooplankton stock than the remaining area, mainly due to the outstanding numerical dominance of the cladoceran species Penilia avirostris. Copepods displayed notably low densities within the gyre and low species diversity, the calanoid Temora stylifera was the only abundant species. The mesozooplankton community outside the gyre zone shifted towards lower levels of total abundance, with a lesser contribution of cladocerans and an increase in the importance of small-sized copepods (e.g. Acartia clausi, Paracalanus parvus, copepodites of Oithona spp. and Clausocalanus spp.). In the subsurface layer (Layer 2), the mesozooplankton community also exhibited spatial heterogeneity which could be hardly explained by variability in environmental parameters. The periphery of the anticyclone below the halocline was distinguished from the remaining neritic area, presenting markedly high mesozooplankton productivity and distinct group composition. An inverse pattern in the mesozooplankton stock vertical distribution was observed at the periphery of the gyre (Layer 2> Layer 1) comparative to the remaining sites (Layer 1 > Layer 2), which was mainly due to unusually high concentrations of surface-living zooplankters below the halocline. The latter could be explained in terms of expected water flow patterns in an anticyclonic eddy.

Parasites of Scyliorhinus canicula (Linnaeus, 1758) in the north-eastern Aegean Sea

2017 ◽  
Vol 98 (8) ◽  
pp. 2133-2143 ◽  
Author(s):  
Vasileios Bakopoulos ◽  
Euaggelia Tsepa ◽  
Anastasia Diakou ◽  
Giorgos Kokkoris ◽  
Markos Nikolaos Kolygas ◽  
...  
Keyword(s):  
Prey Availability ◽  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Sampling Period ◽  
First Record ◽  
Scyliorhinus Canicula ◽  
The North ◽  
Eastern Aegean ◽  
North Eastern ◽  
Eastern Aegean Sea

The parasitic fauna of the small-spotted catshark, Scyliorhinus canicula in the north-eastern Aegean Sea was investigated. Twenty-one out of the 52 (prevalence 40.4%) specimens collected were found infected with parasites; an arthropod and two nematode genera. Seven specimens (prevalence 13.5%) were infected by a Neoalbionella sp. copepod. Ten and 14 specimens were infected by the nematodes Proleptus obtusus (prevalence 19.2%) and Anisakis sp. (prevalence 26.9%), respectively. Female S. canicula specimens were significantly more heavily infected during autumn and when the whole sampling period is considered. Nematode infection was significantly related to season, becoming progressively heavier from spring to autumn. No correlation was found between TL of specimens and number of parasites for males or females, irrespective of gender. The present study provided a first record of Neoalbionella sp., P. obtusus and Anisakis sp. infections of S. canicula in the north-eastern Mediterranean. The lower prevalence of Proleptus obtusus and the higher prevalence of Anisakis sp. infection recorded in this study may be due to prey availability and parasite populations in this locality.

Comparison of fish assemblages between the Sea of Marmara and the Aegean Sea (north-eastern Mediterranean)

2011 ◽  
Vol 91 (6) ◽  
pp. 1307-1318 ◽  
Author(s):  
Cetin Keskin ◽  
Francesc Ordines ◽  
Beatriz Guijarro ◽  
Enric Massutí
Keyword(s):  
Environmental Conditions ◽  
Fish Assemblages ◽  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Demersal Fish ◽  
Sea Of Marmara ◽  
The North ◽  
Eastern Aegean ◽  
North Eastern ◽  
Eastern Aegean Sea

The demersal fish assemblages of the south-western Sea of Marmara and the north-eastern Aegean Sea were examined in relation to their biogeographical and environmental conditions. Sampling was carried out during bottom trawl surveys conducted during five periods between June 2006 and August 2007. A total of 40 hauls were processed, including 16 in the Sea of Marmara (38–74 m deep) and 24 in the north-eastern Aegean Sea (63–401 m deep). A total of 47,940 individuals, from 91 species and 47 families were collected. Cluster analysis of catch data indicated that there were three assemblages, one in the shelf of the Sea of Marmara and two in the Aegean Sea (<100 and >200 m depth). The numerical abundance and biomass of fish, mean fish weight, mean species richness, diversity and evenness were compared between these assemblages. Multivariate analysis was used to test differences in environmental conditions between areas, and relationships between species and environmental variables were explored by using redundancy analysis. In addition to bathymetric differences, differences in both diversity and species composition were observed between shelf assemblages in the two nearby areas. The distinct biogeographical, environmental characteristics (depth, dissolved oxygen and temperature) and fishing pressure are discussed as the main factors which could explain the differences detected.

Reproductive biology of Eledone moschata (Cephalopoda: Octopodidae) in the Aegean Sea (Izmir Bay, Turkey)

2007 ◽  
Vol 87 (4) ◽  
pp. 967-970 ◽  
Author(s):  
Okan Akyol ◽  
Halil Şen ◽  
H. Tuncay Kınacıgil
Keyword(s):  
Gonadosomatic Index ◽  
Aegean Sea ◽  
Monthly Basis ◽  
The North ◽  
Eastern Aegean ◽  
North Eastern ◽  
Winter Peak ◽  
Mean Size ◽  
The Mean ◽  
Two Peaks

Reproductive properties of Eledone moschata from the north-eastern Aegean Sea are reported for the first time. A total of 471 specimens was collected during monthly samplings from December 2004 to November 2005. The mantle lengths of the species were between 4.5 and 15.0 cm with an average of 8.1 cm ±0.15 for 204 males, and between 2.7 and 14.0 cm with an average of 7.8 cm ±0.12 for 267 females. The annual sex ratio (males: females) of the sampled specimens was 1:1.31. Maturity stages were recorded on a monthly basis in both sexes. The highest monthly percentage of mature females (21%) and males (46%) was recorded in January 2005 and June 2005, respectively. The monthly and seasonal gonadosomatic index (GSI) results indicated that E. moschata shows two annual reproduction peaks for each sex. For males, the first spring peak occurs in March–June and the second, autumn peak is in November. For females, the first summer peak occurs in May–June and the second, winter peak is in January, respectively. On the other hand, the reproductive season extends from November to July with two peaks in the Aegean Sea. Total oocyte stock varied from 273 to 2896 with a mean of 836 ±193 oocytes. The mean size of the oocytes was 6.26 ±0.10 mm. The maximum oocyte size found was 10.7 mm. The mean length of spermatophores was of 13.66 ±0.08 mm (range: 7.3–18.3) and their average number was 52 ±6 (range: 6–172).

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