Frequency of Occurrence and Morphometric Characteristics of Mussels Mytilus galloprovincialis with Non-pigmented Tissular Structures near the Odessa Coast of the Black Sea

2015 ◽  
Vol 51 (2) ◽  
pp. 21-29
Author(s):  
I. A. Govorin
Keyword(s):  
Black Sea ◽  
Mytilus Galloprovincialis ◽  
The Black Sea ◽  
Frequency Of Occurrence ◽  
Morphometric Characteristics

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.

Taxonomic structure of the coastal fouling community formed by the Black Sea mussel Mytilus galloprovincialis

2020 ◽  
Vol 12 (2) ◽  
pp. 217-225
Author(s):  
Aleksandr Varigin
Keyword(s):  
Black Sea ◽  
Mytilus Galloprovincialis ◽  
The Black Sea ◽  
Species Structure ◽  
Taxonomic Structure ◽  
Bivalve Mollusks ◽  
Fouling Community ◽  
Key Species ◽  
Quantitative Development ◽  
Degree Of Stability

Peculiarities of the taxonomic structure of the coastal fouling community formed by the bivalve mollusk Mytilus galloprovincialis Lamarck, 1819 on the underwater surface of solid substrates located in the Odessa Bay of the Black Sea have been revealed. The qualitative composition, degree of occurrence, size characteristics and features of quantitative development of invertebrates of this community were determined. As part of the fouling community, 65 species of invertebrates belonging to 61 genera, 47 families, 22 orders, 10 classes and 6 types were identified. It was found that among the large taxa of the community Cnidaria, Annelida, Bryozoa, Arthropoda, Mollusca, Chordata, the most numerous species was the Arthropod type. Annelida and Mollusca accounted for one-fifth and one-fourth of all species. The other three types of invertebrates were represented by one or two species. A characteristic feature of the taxonomic structure of the community was that in most cases, each identified genus was represented by only one species, which in specific conditions was the most environmentally plastic representative of it. It is shown that the species structure of the fouling community was characterized by evident dominance of its edificator M. galloprovincialis. The maximum abundance of this species in the community was 11960 sp.·m-2, and biomass – 10328,6 g·m-2. In addition, 12 other invertebrates with 100 % occurrence were key-species of the community. These species, together with those with occurrence of more than 75 %, belonged to the characteristic species of the community. A total of 22 such species were identified. Among other invertebrates, 5 species (P = 50–75 %) were permanent, 8 species (P = 25–50 %) were rare, and 30 species (P <25 %) were random. The most of the organisms in the coastal fouling community of the Odessa Bay are eurybiont species was established. The presence in the fouling community invasive species of bivalve mollusks Arcuatula senhousia (Benson, 1842), which is systematically very close to the Black Sea mussel Mytilus galloprovincialis, was revealed. Due to its opportunistic properties, this mollusk poses a certain threat to the existence of settlements of aboriginal species of bivalve mollusks. The coastal fouling community formed by the Black Sea mussel has a certain degree of stability, as the same species of invertebrates remain characteristic of its taxonomic structure for 40 years.

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