Ivanovich G. Dynamics of the content of glycogen and total lipids in mussels Mytilus galloprovincialis Lam. in Odessa Bay.

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0406U000623

Thesis Registration Form

0406U000623.pdf

Applicant for

Specialization

  • 03.00.17 - Гідробіологія

25-01-2006

Specialized Academic Board

Д 50.214.01

Essay

Dissertation is a completed scientific-research work in the field of researching the physiological and biochemical indicators of mussels Mytilus galloprovincialisstate state of the Odessa Bay of the Black Sea in connection with the peculiarities of their environment conditions and stages of reproductive cycles For the first time the glycogen content and its dynamics in the body of Odessa Bay mussels has been studied in detail. It has been shown that the glycogen content in the mussel body grown on collectors is 1.8 times higher than in mussels of natural substrates. It significantly decreased from the upper part of the collector to the lower. The glycogen content in the outer parts of clusters is higher then inner 1.6–1.8 fold. When considering the maximum content of glycogen in the mussel body in the summer months, the content is much less in the Odessa Bay than in the mussels of the Crimean area. This is tied with unfavorable oxygen conditions in Odessa Bay. Differences have been revealed in the maximum glycogen content at five coastal stations with different intensity of water exchange. Seasonal dynamics of glycogen content has been compared with the dynamics of total lipid content. When studying the different organs of mussels, it has been established that the maximum glycogen content is in the gonads, minimum – in the gills. The highest level of the glycogen reserves has been reached at the dormancy stage in all organs. Minimum has been noted at the gonad discharge stage in all organs. The hepatopancreas has the largest amount of lipids. In all organs the total lipid content is maximum in the period of ripening of gonads, and in the prespawning stage. Minimum has been noted in all organs in the period of gonadal discharge. The possibility has been noted for employing the content of glycogen and total lipids, and also auxiliary indices – content of wet and dry matter, moisture, morpho-functional indices – as indicators of the state of the mussels at different stages of the reproductive cycle and in different environmental conditions.

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