Effects of temperature on sperm motility of burbot Lota lota : spontaneous activation and calcium dependency

2019 ◽  
Vol 95 (4) ◽  
pp. 1137-1144
Author(s):  
Hadiseh Dadras ◽  
Sergey Boryshpolets ◽  
Amin Golpour ◽  
Tomas Policar ◽  
Miroslav Blecha ◽  
...  
Keyword(s):  
Sperm Motility ◽  
Lota Lota ◽  
Calcium Dependency ◽  
Effects Of Temperature ◽  
Spontaneous Activation

scholarly journals Effects of temperature on the intensive culture performance of larval and juvenile North American burbot (Lota lota maculosa)

Aquaculture ◽  
2012 ◽  
Vol 364-365 ◽  
pp. 67-73 ◽  
Author(s):  
James M. Barron ◽  
Nathan R. Jensen ◽  
Paul J. Anders ◽  
Joshua P. Egan ◽  
Susan C. Ireland ◽  
...  
Keyword(s):  
North American ◽  
Intensive Culture ◽  
Lota Lota ◽  
Culture Performance ◽  
Effects Of Temperature

Sperm motility and seminal fluid composition in the burbot, Lota lota

1997 ◽  
Vol 13 (3) ◽  
pp. 113-119 ◽  
Author(s):  
F. Lahnsteiner ◽  
B. Berger ◽  
T. Weismann ◽  
R. Patzner
Keyword(s):  
Sperm Motility ◽  
Seminal Fluid ◽  
Fluid Composition ◽  
Lota Lota

Arrangement of Mitochondria in Spermatozoa of the Mexican Axolotl, Ambystoma Mexicanum

1973 ◽  
Vol 31 ◽  
pp. 626-627
Author(s):  
Ezzatollah Keyhani ◽  
Larry F. Lemanski ◽  
Sharon L. Lemanski
Keyword(s):  
Plasma Membrane ◽  
Sperm Motility ◽  
Substrate Oxidation ◽  
Ambystoma Mexicanum ◽  
Axial Filament ◽  
Mexican Axolotl ◽  
Middle Piece

Energy for sperm motility is provided by both glycolytic and respiratory pathways. Mitochondria are involved in the latter pathway and conserve energy of substrate oxidation by coupling to phosphorylation. During spermatogenesis, the mitochondria undergo extensive transformation which in many species leads to the formation of a nebemkem. The nebemkem subsequently forms into a helix around the axial filament complex in the middle piece of spermatozoa.Immature spermatozoa of axolotls contain numerous small spherical mitochondria which are randomly distributed throughout the cytoplasm (Fig. 1). As maturation progresses, the mitochondria appear to migrate to the middle piece region where they become tightly packed to form a crystalline-like sheath. The cytoplasm in this region is no longer abundant (Fig. 2) and the plasma membrane is now closely apposed to the outside of the mitochondrial layer.

On the Behaviour of a Human Serum Proactivator Reacting with Streptokinase during Artificial Activation of the Fibrinolytic System

1961 ◽  
Vol 06 (03) ◽  
pp. 498-503 ◽  
Author(s):  
W Doleschel ◽  
W Auerswald
Keyword(s):  
Human Serum ◽  
Fibrinolytic System ◽  
Spontaneous Activation ◽  
Significant Change ◽  
Artificial Activation ◽  
Activator System

SummaryDuring “spontaneous” activation of a human euglobulin preparation in suitably spaced samples — while plasminogen became progressively converted into piasmin — the proactivator content was tested by addition of equal amounts of streptokinase and evaluation of the lytic activities on heated and normal bovine fibrin plates. Indepedently of the decreasing content of plasminogen the proactivator which could be activated by streptokinase showed no significant change of concentration. These observation indicate that plasminogen is not acting as proactivator and that there exists a separate proactivator-activator system of the fibrinolytic mechanism in human serum.

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