Results 161 to 170 of about 1,015 (191)
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Ultrastructure of the Caudal Neurosecretory System in Acipenseridae
1978The fine structure of the cells of the caudal neurosecretory system in Acipenseridae exhibits all characteristic neurosecretory features. They have large, polymorphic nuclei rich in chromatin, with numerous nucleoli. The nuclear envelope has many pores. Numerous intranuclear cytoplasmic invaginations are observed; these are characteristic of the nuclei
I. I. Saenko, N. A. Efimova
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Development of mesonephros in prolarvae of acipenserids (acipenseridae)
Journal of Ichthyology, 2007Development of the excretory system in early ontogenesis of acipenserids—the Russian sturgeon Acipenser gueldenstaedtii, the starred sturgeon A. stellatus, the sterlet A. ruthenus, and the great sturgeon Huso huso—is investigated histologically. In acipenserids, the mesonephros develops after hatching.
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[Brain lipid biochemistry of the sturgeons Acipenseridae].
Zhurnal evoliutsionnoi biokhimii i fiziologii, 1976Brain lipids of 4 species of sturgeons-Acipenser güldenstädti, A. stellatus, A. ruthenus and Huso huso-have been investigated. In whole brain homogenates the content of the basic phospholipid families, their fatty acid composition as well as the content of glycosphingolipids-gangliosides, cerebrosides and sulfatides were studied.
E M, Kreps +9 more
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Modern Concepts on the Origin and Distribution of Acipenserids (Acipenseridae)
Journal of Ichthyology, 2023G I Ruban
exaly
Olfactory Receptors in Acipenseridae Fish Larvae
1992Basic aspects of the development of the olfactory system of Acipenseridae occurs during the period between the embryo’s hatching and its period of independent feeding. It was found that actively feeding Acipenseridae larvae have the same types of olfactory receptor cells as observed in adults (Pyatkina, 1976).
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Contemporary Concepts on the Origin and Distribution of Sturgeons (Acipenseridae) in Eastern Asia
Journal of Ichthyology, 2022V N Koshelev, G I Ruban
exaly
Molecular Dating of Phylogeny of Sturgeons (Acipenseridae) Based on Total Evidence Analysis
Russian Journal of Genetics, 2022Sergey Shedko
exaly
Journal für Hirnforschung : internationales Journal für Neurobiologie, 1983
Crown cells are considered to be typical for the Saccus vasculosus of gnathostome fishes. In Acipenser ruthenus these cells could be found on the entire floor of the diencephalon by SEM. There is one accumulation of crown cells in the frontal Recessus praeopticus, one caudal to the optic chiasma and one on the floor of the Recessus lateralis.
Kotrschal, Kurt +2 more
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Crown cells are considered to be typical for the Saccus vasculosus of gnathostome fishes. In Acipenser ruthenus these cells could be found on the entire floor of the diencephalon by SEM. There is one accumulation of crown cells in the frontal Recessus praeopticus, one caudal to the optic chiasma and one on the floor of the Recessus lateralis.
Kotrschal, Kurt +2 more
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2009
Age and growth rate of Black Sea starry sturgeon (Acipenser stellatus, Pallas 1771) were studied based on analysis of pectoral fin spine sections internal structure. Time of annual growth marks formation was determined. Parameters of von Bertalanffy growth equation were estimated.
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Age and growth rate of Black Sea starry sturgeon (Acipenser stellatus, Pallas 1771) were studied based on analysis of pectoral fin spine sections internal structure. Time of annual growth marks formation was determined. Parameters of von Bertalanffy growth equation were estimated.
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