Population development of the invader ctenophore Mnemiopsis leidyi , in the Black Sea and in other seas of the Mediterranean basin

2001 ◽  
Vol 139 (3) ◽  
pp. 431-445 ◽  
Author(s):  
Shiganova T. ◽  
Mirzoyan Z. ◽  
Studenikina E. ◽  
Volovik S. ◽  
Siokou-Frangou I. ◽  
...  
2020 ◽  
Vol 21 (03) ◽  
pp. 117-123
Author(s):  
Enrique González-Ortegón ◽  
Deniz Innal ◽  
Jose A. Cuesta

The real distribution range of a species is mostly unknown due to the lack of sampling in certain regions in the world. This may be especially problematic for freshwater species in the Mediterranean basin since its freshwater inhabitants are taxa highly sensitive to anthropogenic disturbances. The cytochrome oxidase subunit 1 (COI) gene in Atyaephyra recognized seven Atyaephyra species in the Mediterranean basin in recent years. However, the lack of sampling in the Middle East does not help to clarify what Atyaephyra species are present in this region and their distributions. The most extended species in the area is A. orientalis, while A. tuerkayi has been found only in the River Nahr Al-Kabir, which is located along the borders of Lebanon with Syria. DNA barcodes of Atyaephyra specimens collected in this study confirm the first record of A. tuerkayi in Turkey. In addition, Palaemon turcorum, an endemic species to the Sakarya River Basin which flows into the Black sea was collected outside this basin, in rivers of the Mediterranean coast. The fact that the Middle East has not been well surveyed for shrimp could explain the unknown distribution of these species.


2018 ◽  
Vol 29 (1) ◽  
pp. 115-123 ◽  
Author(s):  
GRZEGORZ MACIOROWSKI ◽  
ANTONIA GALANAKI ◽  
THEODOROS KOMINOS ◽  
MICHALIS DRETAKIS ◽  
PAWEŁ MIRSKI

SummaryThe Greater Spotted Eagle is an extremely rare species which is strongly associated with wetlands during the breeding period. The winter habitats of this vulnerable species have not been extensively studied so far, although eagles spend over one third of the year there, and these are therefore also crucial for the conservation of the species. We investigated the distribution of Greater Spotted Eagle wintering grounds in the Mediterranean Basin on the basis of telemetry data from individuals caught in breeding grounds, detailed species counts during wintering in Greece, and a literature search. We found that at least 300–400 individuals (c.15% of the European population) winter in the Mediterranean Basin, sometimes numbering a few dozen in particular river valleys. Individuals used on average 89.7 km2 home ranges for wintering. The Maxent model of wintering habitats performed with high reliability, indicating that most of the coastline along the Mediterranean Sea and some parts of the Black Sea are suitable for the wintering of this species. The distribution of coastal marshes was the most informative for the model. Compositional analyses done for home ranges of GPS tracked individuals and wintering sites in Greece showed the highest preference for salines and salt marshes but also a high preference for coastal lagoons and water courses. We link wetland preference with the availability of medium size prey, optimal for this species, and prey specialisation common to breeding sites.


Author(s):  
Cristina Giambi ◽  
Martina Del Manso ◽  
Maria Dente ◽  
Christian Napoli ◽  
Carmen Montaño-Remacha ◽  
...  

ZooKeys ◽  
2018 ◽  
Vol 801 ◽  
pp. 501-518 ◽  
Author(s):  
Giuseppe Montesanto

Armadilloofficinalis Duméril, 1816 (Armadillidae) is a widespread terrestrial isopod species in the Mediterranean basin and on the western coasts of the Black Sea. The species is adapted to live in xeric environments and has mainly nocturnal habits. This species is capable of producing stridulations, which is nowadays recognized as a synapomorphy of the genus. In both sexes, these vibrations are produced by a line of scales on the propodus of pereopod 4 and 5. The main goals of this study are: to describe the manca stages of Armadilloofficinalis; to detect the presence of the stridulatory apparatus in the manca stages; to evaluate the differences of such apparatus in the various manca stages. The manca stages (I, II, III) of Armadilloofficinalis are described for the first time showing: i, the shortest duration (known in literature) of the manca stage I (approximately 30 minutes); ii, the presence of a rudimental stridulatory organ that may be of great importance in terms of evolutionary aspects and adaptation to terrestrial life. Notes on the reproductive biology are also reported. Furthermore, some considerations on future perspectives for A.officinalis as a model species in biotremology are also discussed.


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