Filtration activity of mollusks Mya arenaria L. (Bivalvia) in estuaries of the southern Baltic Sea
This article argues that, in the estuaries the South Baltic, the bivalve molluscs Mya arenaria are capable of consuming an average of 6.5 % of the water body primary production. A numerical assessment of the filtration rate of these molluscs shows that they can filter daily an average of 2.41 ± 1.01 m3 of water per a square ...
Steroid hormone in marine bivalve molluscs of the annual cycle
... different stages of the life cycle of the Mediterranean mussel (Mytilus galloprovincialis) and the European flat oyster (Ostrea eduliss). The author identifies a common pattern of hormone dynamics consisting in a reduction in the level of hormones in molluscs in the course of maturation. Interspecies differences in the ratio of hormone levels are described. It is suggested that glucocorticoids participate in the regulation of gametogenesis of the investigated species.
1. Баранов В. Г. Физиология ...
The endocrine function organization in flatworms
This article focuses on the endocrine function in flatworms. It is implemented with the help of two groups of hormones. Several centres of neurosecretory cell localisation were discovered in the nervous system of flatworms. The hormonal signal is transmitted with the help of adenylate cyclase system, which is peculiar to vertebrates. Endogenous steroids – sex steroids and glycocorticoids
— were detected in some flatworm species. These data suggest that flatworms have an endocrine system, whose...
The Spectral Dependence of Skin Sensitivity to Light in Immature LYMNAEA STAGNALIS L. Specimens
... 1978. № 82. P. 483—492.
9. Berg E. von, Schneider G. The spectral sensitivity of the dark-adapted eye of Helix pomatia L. // Vision Research. 1972. № 12. P. 2151—2152.
10. Dennis M. J. Electrophysiology of the visual system in a nudibranch mollusc // J. Neurophysiol. 1967. Vol. 30. P.1439—1465.
11. Dogterom G. E., Hofs H. P., Waapenaar P. et al. Spontaneous oviposition and neurohormone induced ovulation and oviposition in Lymnaea stagnalis kept under various experimental conditions // ...
Life forms of the Cardiidae on the Kaliningrad sea coast
This article focuses on the similarity and differences between the morphometric characteristics of subfossil shells of bivalve molluscs found in the wrack zone of the Kaliningrad beaches of the Baltic Sea. It is established that the most stable feature of the species level is the number of radial ribs and the most volatile one is the ω coefficient describing the content of calcium ...
The population structure and the growth of the bivalve mollusc Ruditapes philippinarum in Amur bay (the Sea of Japan)
... individual age of the Japanese littleneck clam is 7 years. The maximum shell length is 5.2 mm. The sex ratio is almost 1 to 1. There are registered cases of hermaphroditism and parasitic castration. The rate of linear growth has increased to three years. The molluscs reach the harvestable size in three years.
1.
Волова Г.
Н.,
Жакина Т.
И., Микулич Л.
В.
Бентос бухты Алексеева (залив Петра Великого) // Прибрежный планктон ...
Ontogenetic Dynamics of Hydrocortisone Quantitative Content of the Common Octopus Octopus vulgaris, Lamark (Cephalopoda: Octopodidae)
... biosynthesis of steroids by the gonad of the
Sepia officinalis
// Gen. and Comp. Endocrinol. 1977. Vol. 33. №
4. P. 554—565.
7.
Henry J., Boucaud-Camou E.
In vitro stimulation by progesterone of the main nidamental glands biosyntheses in the mollusc cephalopod
Sepia officinalis
L. // Comp. Biochem. Physiol. 1994. Vol. 108A. №
1. P. 25—30.
8.
Буруковский
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Н
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Зуев
Г
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Нигматуллин
Ч
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Методические
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The impact of environmental factors on the distribution of Macoma balthica (Linnaeus 1758) and Mytilus edulis (Linnaeus 1758) in the southeastern part of the Baltic Sea
... environmental factors on the distribution of two abundant bivalve species – Macoma balthica and Mytilus eduli – in the south-east of the Baltic Sea. First of all, the distribution of species was determined by the types of soils. The distribution of molluscs in deep-water sectors was limited by oxygen deficiency in near-bottom waters.
1.
Гусев А.
А.,
Урбанович О.
А.
Видовой состав и экологическая характеристика макрозообентоса ...
The geoecological factors of biodiversity in marine invertebrates
This article addresses the physical, biogeochemical and physiological factors in the framework of marine invertebrate biodiversity problem. The comparison of the biodiversity indicators of fossils and modern organisms is considered as the crucial method of the reconstruction of alterations in populations and ecosystems.
1.
Блажчишин А.
И.
Палеогеография и эволюция позднечетвертичного осадконакопления в Балтийском...
The species composition and the biotopical groups of the gastropoda in the pond of Kaliningrad
... article considers the species composition, species biotopic distribution, nutrition, and zoogeographic characteristics of gastropoda in Kaliningrad ponds. The author shows the interplay of ecological factors that determine the species composition of molluscs. The article also presents the data on the impact of the invasive species Potamopyrgus antipodarum (Gray, 1843) on the malacofauna of water bodies.
1.
Аристова Г
.
И
. Бентос Куршского и Вислинского ...
Methods of Assessing Coastal Marine Waters Quality: Current State and Perspectives
The article considers the basic methods of sea water quality assessment. The indicators of shell diversity of dominant bivalve molluscs in tidal accumulations are suggested as the most efficient field method.
1.
Краснов Е.
В., Корнеевец Л.
В.
Антропогенное воздействие на морские экосистемы европейских ...