Results 161 to 170 of about 6,878 (201)
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General and Comparative Endocrinology, 2023
In vertebrates, the hypothalamic-pituitaryadrenal/interrenal (HPA/HPI) axis is a highly conserved endocrine axis that regulates glucocorticoid production via signaling by corticotropin releasing hormone (CRH) and adrenocorticotropic hormone (ACTH).
Ciaran A. Shaughnessy +4 more
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In vertebrates, the hypothalamic-pituitaryadrenal/interrenal (HPA/HPI) axis is a highly conserved endocrine axis that regulates glucocorticoid production via signaling by corticotropin releasing hormone (CRH) and adrenocorticotropic hormone (ACTH).
Ciaran A. Shaughnessy +4 more
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Role of Ca2+ in the IVM of spermatozoa from the sterlet Acipenser ruthenus
Reproduction, Fertility and Development, 2016The role of Ca2+ in sturgeon sperm maturation and motility was investigated. Sperm from mature male sterlets (Acipenser ruthenus) were collected from the Wolffian duct and testis 24 h after hormone induction. Testicular spermatozoa (TS) were incubated in Wolffian duct seminal fluid (WDSF) for 5 min at 20°C and were designated ‘TS after IVM’ (TSM ...
Olga, Bondarenko +3 more
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Impact of cryopreservation on sterlet, Acipenser ruthenus sperm motility and proteome
Animal Reproduction Science, 2018Fish sperm cryopreservation is a well-established technique allowing for artificial insemination on a commercial scale. The extent of proteome alterations in seminal plasma and sperm due to cryopreservation, however, is not known. This study was conducted to evaluate the effect of cryopreservation on motility variables of sterlet Acipenser ruthenus ...
Miaomiao, Xin +8 more
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Size determination of Acipenser ruthenus spermatozoa in different types of electron microscopy
Micron, 2010In this study three types of scanning electron microscopes were used for the size determination of spermatozoa of sterlet Acipenser ruthenus - high vacuum scanning electron microscope (SEM, JEOL 6300), environmental scanning electron microscope (ESEM, Quanta 200 FEG), field emission scanning electron microscope (FESEM, JEOL 7401F) with cryoattachment ...
Martin, Psenicka +3 more
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Identification of metallothionein gene structure in sterlet (Acipenser ruthenus)
2017Aquatic organisms present, not only simple sources of accumulated metal, but can interact with metals, altering their toxicity. Due to exposition of biosphere with metals, organisms have developed various defense mechanisms to protect themselves against adverse effects of these ions and their compounds.
Hadian, A. +4 more
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Quantification of egg proteome changes during fertilization in sterlet Acipenser ruthenus
Biochemical and Biophysical Research Communications, 2017Eggs of sterlet are discharged outside into ambient aquatic environment where egg activation and fertilization occur. Effects of different activation media including freshwater and clay suspension on protein abundances of egg were quantified in sterlet Acipenser ruthenus.
Hamid, Niksirat +4 more
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Fish Physiology and Biochemistry, 2002
This paper provides data concerning biochemical composition of milt of two sturgeon species, Siberian sturgeon bred in aquaculture facility of Inland Fisheries Institute in North Poland and sterlet (from two different populations from Danube and Odra). Milt plasma of Siberian sturgeon and sterlet, when compared to teleost fish, is characterized by much
B. Piros +7 more
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This paper provides data concerning biochemical composition of milt of two sturgeon species, Siberian sturgeon bred in aquaculture facility of Inland Fisheries Institute in North Poland and sterlet (from two different populations from Danube and Odra). Milt plasma of Siberian sturgeon and sterlet, when compared to teleost fish, is characterized by much
B. Piros +7 more
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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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Hydrobiologia, 1972
The author investigated the presence of various carotenoids in the unfertilized eggs of the Acipenser ruthenus ruthenus L. (Acipenseridae) and “caviar” by means of columnar and thin-layer chromatography. The investigations revealed the presence of the following carotenoids:
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The author investigated the presence of various carotenoids in the unfertilized eggs of the Acipenser ruthenus ruthenus L. (Acipenseridae) and “caviar” by means of columnar and thin-layer chromatography. The investigations revealed the presence of the following carotenoids:
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Motility and fertilizing capability of cryopreserved Acipenser ruthenus L. sperm
Journal of Applied Ichthyology, 1999Summary Motility before and after cryopreservation of Acipenser ruthenus sperm was determined by computer-assisted sperm motion analysis (CASA). In addition, fertility of fresh and frozen/ thawed sperm was tested by in vitro fertilization. Sperm of A.
H. Jähnichen +5 more
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