Results 151 to 160 of about 260,916 (195)

Mitochondrial genome of the Siberian sturgeonAcipenser baerii

Mitochondrial DNA, 2012
The complete mitochondrial genome of Siberian sturgeon Acipenser baerii had been determined. The total length of the mitogenome was 16,763 bp and had 13 protein-coding, 22 tRNA, and 2 rRNA genes. Except for the eight tRNA and Nd6 genes, all other mitochondrial genes are encoded on the heavy strand. The overall base composition of the heavy strand is 30.
Xiao Wu, Chen, Shan, Jiang, Zhi Yi, Shi, Qian, Li, Xing Rong, Xun, Da Qing, Guo   +5 more
openaire   +2 more sources

Identification of the molecular sex‐differentiation period in the siberian sturgeon

Molecular Reproduction and Development, 2015
SUMMARYSexual development prior to gonadal sex differentiation is regulated by various molecular mechanisms. In fish, a “molecular sex‐differentiation period” has been identified in species for which sex can be ascertained prior to gonadal sex differentiation.
Vizziano-Cantonnet, Denise, Di Landro, Santiago, Lasalle, André, Martínez, Anabel, Mazzoni, Talita Sarah, Quagio-Grassiotto, Irani   +5 more
openaire   +3 more sources

Sex Determination and Differentiation of the Siberian Sturgeon

2017
This is a synthesis of the published information on sex determination and differentiation in sturgeons with special emphasis in Siberian sturgeon Acipenser baerii. The sex-determination system has been poorly studied in sturgeons and paddlefishes. Among 27 species of Acipenseriformes, the WZ-female model has been proposed in five species and one hybrid
Denise Vizziano-Cantonnet, Santiago Di Landro, André Lasalle   +2 more
openaire   +1 more source

Circulatory and respiratory effects of an hypoxic stress in the Siberian sturgeon

Respiration Physiology, 1995
Changes in circulatory, ventilatory and acid-base variables were studied in Siberian sturgeon (Acipenser baeri) exposed to acute and severe hypoxia (PWO2 = 10 torr), followed by a rapid return to normoxia. This treatment caused a significant stress, revealed by the high levels of plasma catecholamines and cortisol.
Maxime, V., Nonnotte, G., Peyraud, C., Williot, Patrick, Truchot, J.P.   +4 more
openaire   +3 more sources

Siberian sturgeon Acipenser baerii in the River Pechora

Journal of Ichthyology, 2007
The paper reports the first reliable capture since the last 150 yr of two sturgeons in the basin of the River Pechora. Both specimens had the systematic traits of the Siberian sturgeon Acipenser baerii but differed significantly in external morphology. Data on biological traits and morphological parameters of the fish are presented.
A. B. Zakharov, M. D. Tumanov, S. N. Shalaev   +2 more
exaly   +2 more sources

Sperm and Spermatozoa Characteristics in the Siberian Sturgeon

2017
Sperm and spermatozoa in Siberian sturgeon are very interesting and specific from several points of view. Siberian sturgeon usually produces high volume of semen with relatively low sperm and protein concentration, which is partially explained by the atypical testicular morphology where spermatozoa are mixed with urine during passage through the ...
Martin Pšenička, Andrzej Ciereszko
openaire   +1 more source

Osmoregulation in juvenile Siberian sturgeon (Acipenser baerii)

Fish Physiology and Biochemistry, 2002
The osmoregulation capabilities of juvenile Siberian sturgeon exposed to three experimental osmolalities (22, 250 and 387 mOsmol kg−1) were studied over a 45-day period. Growth performance, haematological parameters, ion concentrations, gill and spiral valve Na+-K+-ATPase activities, as well as gill and spiral valve histology, were measured. At the end
A. Rodríguez, M.A. Gallardo, E. Gisbert, S. Santilari, A. Ibarz, J. Sánchez, F. Castelló-Orvay   +6 more
openaire   +1 more source

Food Characteristics and Feeding Management on Sturgeon with a Special Focus on the Siberian Sturgeon

2017
Information on nutrition and feeding is scarce for most sturgeon species. In natural waters, the Siberian sturgeon, Acipenser baerii Brandt, feeds predominantly on benthic organisms. Information on Siberian sturgeon nutrition and feeding is needed because of increased interest from hatcheries and farms producing fish for release, meat, and caviar ...
Ryszard Kolman, Andrzej Kapusta
openaire   +1 more source

Motility analysis and energetics of the Siberian sturgeon Acipenser baerii spermatozoa

Journal of Applied Ichthyology, 1999
90% des spermatozoïdes sont activés en quelques secondes après dilution puis réduiront régulièrement leur activité juqu'à 5-10% au bout de 2mn. Durant la même période, le battement des spermatozoïdes baissera de 50Hz à 25-40Hz après 40sec. Le mouvement des flagelles, d'abord distribué uniformémént sur toute la longueur, disparaîtra de l'extrémité chez ...
Billard, Roland, Cosson, J., Fierville, F., Brun, Rémy, Rouault, T., Williot, Patrick   +5 more
openaire   +2 more sources

Behaviour of Early Life Stages in the Siberian Sturgeon

2017
In this chapter, field data and laboratory studies on the behaviour and development of Siberian sturgeon at early-life intervals have been reviewed and the available information assessed under two different points of view, the biological/ecological approach and the aquaculture one.
Enric Gisbert, Mikhail Solovyev
openaire   +1 more source