scholarly journals THE INTER-ANNUAL CHANGES OF THE QUANTITATIVE AND BIOMASS INDICES OF MUSSELS MYTILUS GALLOPROVINCIALIS Lam. AND MYTILASTERS MYTILASTER LINEATUS Gmel. IN THE PERIPHYTON SETTLEMENTS NEAR ODESA COAST OF THE BLACK SEA

2016 ◽  
Vol 21 (1(38)) ◽  
pp. 117
Author(s):  
И. А. Говорин ◽  
Е. И. Шацилло
Keyword(s):  
Black Sea ◽  
Mytilus Galloprovincialis ◽  
The Black Sea ◽  
Annual Changes ◽  
Mytilaster Lineatus

scholarly journals SEX INVERSION IN CULTIVATED MUSSELS MYTILUS GALLOPROVINCIALIS LAM. (CRIMEA, BLACK SEA) UNDER INFLUENCE OF EXTERNAL ENVIRONMENTAL FACTORS

2018 ◽  
Vol 19 ◽  
pp. 26-31
Author(s):  
Natalya Chelyadina ◽  
Natalya Pospelova ◽  
Mark Popov ◽  
Ludmila Smyrnova ◽  
Irina Kharchuk ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Sex Ratio ◽  
Black Sea ◽  
Diesel Fuel ◽  
Hormonal Regulation ◽  
Anthropogenic Impact ◽  
Mytilus Galloprovincialis ◽  
The Black Sea ◽  
Sex Inversion ◽  
Anionic Detergents

In the last decade, there has been a shift in the sex ratio of the mussel Mytilus galloprovincialis in the Black Sea towards increase of males. In modern literature, focus is mainly on mechanisms of sex inheritance in mussels and hormonal regulation of the reproduction, and there is no information on sex inversion in M. galloprovincialis under the influence of environmental factors. The goal of this work is to establish the fact of sex change in mussels cultivated near the coast of Crimea under the influence of some external environmental factors. We establish that mussels change sex from female to male, but some specimens become hermaphrodites, with their fraction reaching 13%. Under unfavorable environmental conditions, mussel females change sex, and their mortality rises up to 69%. In water areas subject to anthropogenic impact, the proportion of sex inversion in the mollusks may be as high as 58%. The influence of various adverse   environmental factors on sex inversion in mussel females is unequal, and its strength decreases in the following order: diesel fuel > hypoxia > anionic detergents > starvation.

scholarly journals CHARACTERISTICS OF ACTINOBACTERIA FROM MYTILUS GALLOPROVINCIALIS OF ODESSA GULF OF THE BLACK SEA

2021 ◽  
pp. 84-93
Author(s):  
N. V. Korotaeva ◽  
I. V. Strashnova ◽  
N. Yu. Vasylieva ◽  
K. S. Potapenko ◽  
I. P. Metelitsina ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Black Sea ◽  
Mytilus Galloprovincialis ◽  
Biochemical Properties ◽  
Biologically Active ◽  
The Black Sea ◽  
Identification System ◽  
Streptomyces Sp ◽  
Physiological And Biochemical ◽  
Physiological And Biochemical Properties

Today both academic and commercial interests in marine actinobacteria are growing. As they live in a unique environment that promotes the synthesis of new biologically active metabolites. The aim of the work is isolation, primary identification and study of morphological, cultural, physiological and biochemical properties of actinobacteria, separate from mussels (Mytilus galloprovincialis) of the Odessa Bay of the Black Sea. Methods. Samples of mussels collected in the coastal zone of Odessa Bay were used as material for the isolation of actinobacteria. Isolation of actinobacteria and the study of their morphological, cultural, physiological and biochemical properties was carried out by traditional microbiological methods. The fatty acid composition was determined on an Agilent 7890 semi-ionization gas chromatograph (Agilent Technologies, USA) to identify test strains using the Sherlock Microbial Identification System library. Results. From samples of mussels collected in 2020 in the area of the Hydrobiological Station of Odessa National I.I. Mechnikov University were isolated 14 strains of actinobacteria. They were identified by fatty acid analysis to Streptomyces genus. Strains of Streptomyces sp. Myt2, Myt6 and Myt7ch synthesized melanoid pigments. Strains of actinobacteria are well absorbed by most of the studied sources of carbon, except strains of Streptomyces sp. Myt12a, Myt12b. Almost half of the strains have oxidase activity and coagulate milk. Conclusions. As a result of microbiological studies for the first time were characterized morphological, cultural and physiological and biochemical properties and determined taxonomic composition by fatty acid spectra for actinobacteria isolated from the mussels of the Odessa Bay of the Black Sea.

scholarly journals The role of microalgae of the genus prorocentrum in the Diet of mussels mytilus galloprovincialis (Lamarck, 1819) (Black Sea) in suspended culture

2021 ◽  
Vol 937 (2) ◽  
pp. 022072
Author(s):  
N Pospelova ◽  
A Priimak
Keyword(s):  
Species Composition ◽  
Black Sea ◽  
Mytilus Galloprovincialis ◽  
The Black Sea ◽  
Quantitative Composition ◽  
Suspended Culture ◽  
Qualitative And Quantitative ◽  
Different Types

Abstract The aim of this work was to study the role of microalgae of the genus Prorocentrum in the diet of the Black Sea mussel Mytilus galloprovincialis. The work analyzed the qualitative and quantitative composition of dinophytes of the genus Prorocentrum: P. compressum, P. cordatum, P. micans, P. scutellum, P. pusillum, P. balticum, P. maximum, P. lima in three types of samples (phytoplankton, mussel stomachs and their bio-sediments). Differences in the species composition of microalgae are described for three types of samples. It was noted that P. cordatum and P. micans predominate in plankton in winter, P. balticum and P. cordatum - in spring, P. cordatum, P. micans, P. balticum and P. pussilum - in summer, and P. micans - in autumn. At the same time, P. compressum and P. micans dominate in stomachs throughout the year. P. compressum was found in bio-sediments throughout the year, reaching almost 100% of the total number of dinophytes of the genus Prorocentrum in April; P. micans prevailed in winter, summer and autumn; P. cordatum was dominant in February, March and May. Different types of microalgae of the genus Prorocentrum are expected to have different degrees of digestion.

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