Results 31 to 40 of about 1,247 (204)
Disturbances in the ploidy level in the gynogenetic sterlet Acipenser ruthenus [PDF]
Artificial mitotic gynogenesis, a chromosome set manipulation, is applied to provide the homozygous progeny with only maternal inheritance. Here, gynogenetic development was induced in the sterlet Acipenser ruthenus L. (Acipenseridae) by activation of the eggs originating from albino females with the UV-irradiated spermatozoa from wild-coloured males ...
Fopp-Bayat, D. +4 more
openaire +3 more sources
Sperm Lipid Composition in Early Diverged Fish Species: Internal vs. External Mode of Fertilization
The lipid composition of sperm membranes is crucial for fertilization and differs among species. As the evolution of internal fertilization modes in fishes is not understood, a comparative study of the sperm lipid composition in freshwater ...
Kathrin M. Engel +7 more
doaj +1 more source
The effects of polyculture on behaviour and production of pikeperch in recirculation systems
Recirculating aquaculture systems (RASs) are seen as a promising technology to address the societal and environmental challenges of aquaculture. However, this technology is mainly used in intensive monoculture and little knowledge is available in ...
M. Thomas +10 more
doaj +1 more source
Sterlet (Acipenser ruthenus) is a sturgeon that hold an important place in aquaculture, being a species that can be raised both outdoors in fishponds and indoors in recirculating aquaculture systems (RAS).
Hurjui Ramona Ramona +3 more
doaj +1 more source
The experiment examined the possibility of rearing juvenile pikeperch, Sander lucioperca (L.) in polyculture with sterlet Acipenser ruthenus L. in a recirculating system.
Kozłowski Michał +4 more
doaj +1 more source
The current state of stocks and artificial reproduction of Sterlet in Russia
Based on the analysis of literary sources on the history of fishing in rivers and reservoirs of Russia for the XX and the beginning of the XXI century, the characteristics of the current state of sterlet stocks by subjects in individual fisheries basins are given.
A. D. Bykov, S. Y. Brazhnik
openaire +1 more source
The aquaculture of the sturgeons from the Danube River basin is a niche approached by more and more Romanian entrepreneurs. The sterlet (Acipenser ruthenus) is a fresh water sturgeon with some useful characteristics that recommend this species to become ...
Sandra Mihailov +3 more
doaj
Heavy metals Hg, Cd, and Pb in the body of sterlet (Acipenser ruthenus L.), the Lower Irtysh River
For assessing the possibility of using sterlet as a species-bioindicator of heavy metals' contamination in the bottom sediments, a study has been conducted on the distribution and accumulation of these pollutants in the fish body.
A. A. Chemagin +3 more
doaj +1 more source
Physical enrichment of structures has been used for the last decades in aquaculture to improve fish production and welfare. Until now, this enrichment has been practiced in fish monoculture but not in fish polyculture.
Marielle Thomas +4 more
doaj +1 more source
To the structure of the spinal cord in sterlets
In this session, we will allow ourselves to report the observations made in the laboratory and the highly respected teacher, prof. N.A.Mislavsky, on the structure of the spinal cord in sterlets.Our communication will be reduced, mainly, to the description of: 1) neuroglia cells, 2) ependyma cells and 3) nerve cells with the help of the substance.
openaire +2 more sources

