Preliminary report on the age-related variations in the serum and seminal plasma testosterone, seminal plasma biochemistry and seminal vesicle histochemistry of male broodstock African catfish (Clarias gariepinus)

2017 ◽  
Vol 26 (5) ◽  
pp. 1041-1047
Author(s):  
Chidozie Nwabuisi Okoye ◽  
Susan Omuboba Dan-Jumbo ◽  
Anietie Francis Udoumoh ◽  
Ukamaka Uchenna Eze ◽  
Anthony Chukwuemeka Ozokoye ◽  
...  
2019 ◽  
Vol 29 (1) ◽  
pp. 69-73 ◽  
Author(s):  
Ibrahim Adeshina ◽  
Benjamin O. Emikpe ◽  
Adetola Jenyo-Oni ◽  
Emmanuel K. Ajani ◽  
Musa I. Abubakar

Aquaculture ◽  
1989 ◽  
Vol 83 (1-2) ◽  
pp. 137-151 ◽  
Author(s):  
J.W. Resink ◽  
W.G.E.J. Schoonen ◽  
P.C.H. Albers ◽  
D.M. Filé ◽  
C.D. Notenboom ◽  
...  

1987 ◽  
Vol 247 (3) ◽  
pp. 573-582 ◽  
Author(s):  
R. van den Hurk ◽  
J. W. Resink ◽  
J. Peute

Aquaculture ◽  
1987 ◽  
Vol 63 (1-4) ◽  
pp. 115-127 ◽  
Author(s):  
J.W. Resink ◽  
R. Van Den Hurk ◽  
R.F.O. Groeninx Van Zoelen ◽  
E.A. Huisman

Reproduction ◽  
2001 ◽  
pp. 817-827 ◽  
Author(s):  
AT Viveiros ◽  
EH Eding ◽  
J Komen

The effects of 17alpha-methyltestosterone on seminal vesicle development in the African catfish, Clarias gariepinus, were investigated in an attempt to improve semen collection from this species. Treatment of larvae with dietary 17alpha-methyltestosterone at 50 mg kg(-1) for days 12-33 or days 12-40 after hatching, or at 20 mg kg(-1) for days 12-26, 12-33, 12-40 or 12-47 after hatching inhibited the development of the seminal vesicle finger-like extensions in male catfish, but did not affect the sex ratio. The minimum effective dose and period of treatment to inhibit seminal vesicle development in all male catfish treated with 17alpha-methyltestosterone was 20 mg kg(-1) for days 12-40 after hatching. Male catfish from this treatment group developed normal testes that, in some cases, contained a few oocytes, which tended to disappear before sexual maturation. After sexual maturation, the semen release response was evaluated in males with incomplete seminal vesicles. Fluid with viable spermatozoa was obtained after two consecutive injections of carp pituitary suspension, from 10 of 19 males that had been fed 20 mg 17alpha-methyltestosterone kg(-1) for days 12-40 or days 12-47 after hatching, but from only 4 of 15 males that did not receive any dietary steroid. Intratesticular semen quality was not affected by 17alpha-methyltestosterone treatment. The results of this study demonstrate that the absence of seminal vesicle extensions induced by treatment with 17alpha-methyltestosterone facilitated the collection of semen by stripping from this species of fish.


Aquaculture ◽  
1989 ◽  
Vol 83 (1-2) ◽  
pp. 153-166 ◽  
Author(s):  
J.W. Resink ◽  
P.K. Voorthuis ◽  
R. Van Den Hurk ◽  
R.C. Peters ◽  
P.G.W.J. Van Oordt

Author(s):  
Dyah Anggraeni ◽  
Nurlela Nurlela

Background: Natural preservatives are compounds produced by natural ingredients that can suppress bacterial growth and development. Natural preservatives are carried out because most of the preservatives circulating are chemicals and unsafe for the body. One of the natural preservatives is by using garlic extract (Allium sativum L).  Objective: This study is aimed to determine the effectiveness of the antibacterial garlic (Allium sativum L) as a natural preservative in fresh African catfish (Clarias gariepinus).  Method: This research used the Pour Plate iroculation method. African catfish (Clarias gariepinus) which is soaked with garlic (Allium sativum L) with a concentration of 7%, 14% and 21% for 30 minutes, then the fish will be kept at room temperature with a storage period of 24 hours and 48 hours and calculated growth in bacterial numbers with the Colony counter.  Result: Based on the research result, it was found that garlic extract (Allium sativum L) can obstruct the effectiveness of antibacterial in African catfish (Clarias gariepinus) at a concentration of 14%.


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