scholarly journals Evidence for a possible life-cycle association between <i>Syracosphaera protrudens</i> (heterococcolithophore) and <i>Syracosphaera pulchra</i> HOL <i>pirus</i>-type (holococcolithophore)

2009 ◽  
Vol 28 (1) ◽  
pp. 1-6 ◽  
Author(s):  
M. V. Triantaphyllou ◽  
M. D. Dimiza ◽  
E. Malinverno ◽  
J. R. Young
Keyword(s):  
Life Cycle ◽  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Current Understanding

Abstract. An apparently unambiguous combination coccosphere from the Eastern Mediterranean (Aegean Sea, Greece) is documented involving Syracosphaera protrudens Okada &amp; McIntyre, 1977 and Syracosphaera pulchra Lohmann, 1902 HOL pirus-type. This finding is difficult to interpret in terms of the current understanding of Syracosphaera taxonomy and adds evidence to the hypothesis of a distinctly complex Syracosphaera pulchra life cycle.

scholarly journals Development, application and evaluation of a 1-D full life cycle anchovy and sardine model for the North Aegean Sea (Eastern Mediterranean)

PLoS ONE ◽  
2019 ◽  
Vol 14 (8) ◽  
pp. e0219671 ◽  
Author(s):  
Athanasios Gkanasos ◽  
Stylianos Somarakis ◽  
Kostas Tsiaras ◽  
Dimitrios Kleftogiannis ◽  
Marianna Giannoulaki ◽  
...  
Keyword(s):  
Life Cycle ◽  
Eastern Mediterranean ◽  
Aegean Sea ◽  
The North ◽  
Full Life Cycle ◽  
North Aegean ◽  
Full Life ◽  
North Aegean Sea ◽  
Development Application

scholarly journals Verification of the <i>Algirosphaera robusta</i>–<i>Sphaerocalyptra quadridentata</i> (coccolithophores) life-cycle association

2003 ◽  
Vol 22 (1) ◽  
pp. 107-111 ◽  
Author(s):  
M. V. Triantaphyllou ◽  
M. D. Dimiza
Keyword(s):  
Life Cycle ◽  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Common Life ◽  
Coastal Marine ◽  
Sem Micrograph ◽  
Andros Island ◽  
Coastal Marine Ecosystems ◽  
Spatial And Vertical Distribution ◽  
Living Coccolithophores

Abstract. Living coccolithophores were collected from eight stations along a transect in the gulf of Korthi (southeastern Andros island, Aegean Sea, Eastern Mediterranean) in August 2001. Samples were collected from 0–120 m water depth to determine the cell density, the species composition and the biogeographical (spatial and vertical) distribution of the coccolithophore biocommunities in coastal marine ecosystems. The studies revealed an impressive heterococcolith–holococcolith combination coccosphere (SEM micrograph) involving the species Algirosphaera robusta and Sphaerocalyptra quadridentata. In addition, a second association was observed by light microscopy. This discovery verifies the suggestions of Kamptner (1941) and provides strong proof on the assignment of these two ‘species’ in a common life cycle, increasing significantly our knowledge of life-cycle pairings ecology.

Simulating anchovy’s full life cycle in the northern Aegean Sea (eastern Mediterranean): A coupled hydro-biogeochemical–IBM model

2015 ◽  
Vol 138 ◽  
pp. 399-416 ◽  
Author(s):  
D. Politikos ◽  
S. Somarakis ◽  
K.P. Tsiaras ◽  
M. Giannoulaki ◽  
G. Petihakis ◽  
...  
Keyword(s):  
Life Cycle ◽  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Full Life Cycle ◽  
Full Life ◽  
Northern Aegean Sea

scholarly journals Peracarida populations of hard substrate assemblages in ports of the NW Aegean Sea (eastern Mediterranean)

2004 ◽  
Vol 58 (1) ◽  
pp. 54-61 ◽  
Author(s):  
C.-C. Chintiroglou ◽  
C. Antoniadou ◽  
A. Baxevanis ◽  
P. Damianidis ◽  
P. Karalis ◽  
...  
Keyword(s):  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Hard Substrate

scholarly journals A three dimensional, full life cycle, anchovy and sardine model for the North Aegean Sea (Eastern Mediterranean): Validation, sensitivity and climatic scenario simulations

2021 ◽  
Vol 22 (3) ◽  
pp. 653
Author(s):  
ATHANASIOS GKANASOS ◽  
EUDOXIA SCHISMENOU ◽  
KOSTAS TSIARAS ◽  
STYLIANOS SOMARAKIS ◽  
MARIANNA GIANNOULAKI ◽  
...  
Keyword(s):  
Temperature Increase ◽  
Eastern Mediterranean ◽  
Larval Growth ◽  
Somatic Growth ◽  
Aegean Sea ◽  
Fish Growth ◽  
Prey Concentration ◽  
The North ◽  
North Aegean ◽  
North Aegean Sea

We present the development of a 3D full-lifecycle, individual-based model (IBM) for anchovy and sardine, online coupled to an existing hydrodynamic/biogeochemical low-trophic level (LTL) model for the North Aegean Sea. It was built upon an existing 1D model for the same species and area, with the addition of a horizontal movement scheme. In the model, both species evolve from the embryonic stage (egg+yolk sac larva) to the larval, juvenile, and adult stages. Somatic growth is simulated with the use of a “Wisconsin” type bioenergetics model and fish populations with an adaptation of the ‘super individuals’ (SI) approach. For the reference simulation and model calibration, in terms of fish growth and population biomass, the 2000-2010 period was selected. Interannual biomass variability of anchovy was successfully represented by the model, while the simulated biomass of sardine exhibited low variability and did not satisfactorily reproduce the observed interannual variability from acoustic surveys. The spatial distribution of both species’ biomass was in relatively good agreement with field data. Additional single-species simulations revealed that species compete for food resources. Temperature sensitivity experiments showed that both species reacted negatively to a temperature increase. Anchovy, in particular, was more affected since its spawning and larval growth periods largely overlap with the period of maximum yearly temperature and low prey concentration. Finally, simulation experiments using IPCC climatic scenarios showed that the predicted temperature increase and zooplankton concentration decrease in the future will negatively affect anchovy, resulting in sardine prevalence.

Lessepsian migrants expanding their distributional ranges; Pseudonereis anomala (Polychaeta: Nereididae) in Izmir Bay (Aegean Sea)

2005 ◽  
Vol 85 (2) ◽  
pp. 313-321 ◽  
Author(s):  
Melih Ertan Çinar ◽  
Zeki Ergen
Keyword(s):  
Shallow Water ◽  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Hard Substratum ◽  
Izmir Bay ◽  
Lessepsian Migrants

A total of ten specimens of Pseudonereis anomala (Polychaeta: Nereididae) were collected on the shallow water hard substratum (0·2 m) at four stations located in the inner part of Izmir Bay (Aegean Sea, eastern Mediterranean) in January 2004. The absence of this species among the material collected previously at the same stations might suggest that it has recently become established in the area. A re-description of the species together with its ecological, reproductive, feeding and distributional aspects are provided.

Greek-French defence deal will widen Turkish rifts

2021 ◽  
Keyword(s):  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Content Type ◽  
Low Level ◽  
Defence Procurement

Significance A win-win deal for both, it strengthens their long-standing excellent relations. It also enhances Greece’s military position in the Aegean Sea and France’s presence in the Eastern Mediterranean. However, following a peaceful summer in the Aegean, the pact risks raising tensions between Greece (and Cyprus) and Turkey over maritime borders and drilling rights. Impacts US-Greek defence agreement will be updated to cover a long-term arrangement, allowing for more investment in US bases in Greece. Turkish defence procurement from Russia is likely to rise, straining ties with Washington. Low-level exploratory talks between Greece and Turkey will continue as scheduled amid mutual recriminations.

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