The effect of sexual dimorphism on growth of the black sea turbot, Psetta maxima

2011 ◽  
Author(s):  
İlhan Aydın
Keyword(s):  
Sexual Dimorphism ◽  
Black Sea ◽  
The Black Sea ◽  
Psetta Maxima

scholarly journals The first finding of Dinophilus gyrociliatus O. Schmidt, 1857 (Annelida, Polychaeta, Dinophilidae) at the Black Sea coast of Crimea

2016 ◽  
Vol 1 (2) ◽  
pp. 39-42 ◽  
Author(s):  
E. V. Lisitskaya ◽  
N. A. Boltachova
Keyword(s):  
Sexual Dimorphism ◽  
Black Sea ◽  
The Black Sea ◽  
Body Segment ◽  
First Finding ◽  
Black Sea Coast ◽  
Dinophilus Gyrociliatus ◽  
Sea Coast

The first finding of the polychaete Dinophilus gyrociliatus O. Schmidt, 1857 on the coast of Crimea is reported. The species occurred in 2015 in the waters of Sevastopol (Kruglaya Bay) at the depth of 3–5 m. This species is characterized by the absence of pigmentation, by the presence of one ciliary ring per body segment and by extreme sexual dimorphism. Reproduction of D. gyrociliatus were investigated in the laboratory. Females released cocoons containing from 3 to 10 eggs. Eggs development took 5 days at 18.0–19.5 ℃. The larvae of two types hatch from the cocoons: large females with a length of 500–600 μm and a width of 150–175 μm and small, rudimentarymales resembling trochophore with a diameter of about 100 μm.

scholarly journals Genotyping and Pathogenicity of Viral Hemorrhagic Septicemia Virus from Free-Living Turbot (Psetta maxima) in a Turkish Coastal Area of the Black Sea

2006 ◽  
Vol 72 (4) ◽  
pp. 2373-2378 ◽  
Author(s):  
Toyohiko Nishizawa ◽  
Hacı Savaş ◽  
Hakan Işıdan ◽  
Cennet Üstündağ ◽  
Hiroshi Iwamoto ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Black Sea ◽  
Coastal Area ◽  
The Black Sea ◽  
Viral Hemorrhagic Septicemia Virus ◽  
Free Living ◽  
Genotype I ◽  
Viral Hemorrhagic Septicemia ◽  
Psetta Maxima ◽  
Mass Mortalities

ABSTRACT Viral hemorrhagic septicemia (VHS) is one of the most serious fish viral diseases for cultured rainbow trout (Oncorhynchus mykiss), although VHS virus (VHSV) seems to be ubiquitous among marine fishes. In the present study, VHSV isolation was performed with free-living and cultured turbot (Psetta maxima) in the Trabzon coastal area of the Black Sea to evaluate participation of VHSV in mass mortalities of seed-produced turbot larvae. VHSV was detected in 14 of 66 free-living spawners (positive ratio, 21.2%), 1 of 65 free-living immature fish (1.5%) and 7 of 40 cultured brood stock (17.5%), respectively. Based on a partial glycoprotein gene nucleotide sequence, Turkish VHSV isolates were classified into the class I-e of genotype I and were the most closely related to the GE-1.2 isolate (>98% identity), which was found >20 years ago in Georgia. Thus, it was revealed that Turkish VHSV isolates were not introduced from European countries, it could be an indigenous type of VHSV distributing in the Black Sea environment. In pathogenicity tests, the Turkish isolates did not induce mortality in turbot larvae and rainbow trout fingerlings. Mass mortalities at a rate of approximately 90% occurred in turbot larvae produced by experimental seeding, although VHSV was not detected in any dead fish. Thus, it was concluded that mass mortality in the seed-produced turbot larvae was not caused by VHSV infection.

MÖSSBAUER AND CHEMICAL ANALYSES OF SOME SEDIMENTS FROM THE ROMANIAN SHORE OF THE BLACK SEA

1979 ◽  
Vol 40 (C2) ◽  
pp. C2-445-C2-448
Author(s):  
D. Barb ◽  
L. Diamandescu ◽  
M. Morariu ◽  
I. I. Georgescu
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Chemical Analyses

Modeling of ecological conditions in the Euxine Basin in the Sarmatian and Maeotian by methods of diatom analysis

2019 ◽  
pp. 257-261
Author(s):  
Eleonora P. Radionova
Keyword(s):  
Black Sea ◽  
Late Miocene ◽  
The Black Sea ◽  
Subtidal Zone ◽  
Diatom Analysis ◽  
Diatom Flora ◽  
North West ◽  
Ecological Conditions ◽  
The North

The associations and ecological conditions of the existence of modern diatoms of the North-West (Pridneprovsky), Prikerchensky and Eastern regions of the subtidal zone of the Black Sea are considered. Based on the unity of the composition of the Present and Sarmatian-Meotian diatom flora, an attempt has been made to model some of the ecological c situation of the Late Miocene Euxinian basin.

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