Last edited by Tagrel
Thursday, July 16, 2020 | History

2 edition of Regulation of gonadotropin secretion in the African catfish, Clarias gariepinus (Burchell) = found in the catalog.

Regulation of gonadotropin secretion in the African catfish, Clarias gariepinus (Burchell) =

Renato de Leeuw

Regulation of gonadotropin secretion in the African catfish, Clarias gariepinus (Burchell) =

Regulatie van de gonadotroop hormoon Afgifte in de Afrikaanse meerval, Clarias gariepinus (Burchell)

by Renato de Leeuw

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  • 21 Currently reading

Published by Drukkerij Elikwijk BV in Utrecht .
Written in English

    Subjects:
  • Clarias gariepinus -- Physiology.,
  • Gonadotropin.

  • Edition Notes

    Other titlesRegulatie van de Gonadotroop hormoon Afgifte in de Afrikaanse meerval, Clarias gariepinus (Burchell)
    Statementdoor Renato de Leeuw.
    Classifications
    LC ClassificationsQL638.C6 L44 1985
    The Physical Object
    Pagination192 p. :
    Number of Pages192
    ID Numbers
    Open LibraryOL2426215M
    LC Control Number87112731

    Clarias gariepinus. differs from other catfish in having an auxiliary breathing organs in this special pochet attached to the second and fourth gillarches and are responsible for the ability of. Clarias gariepinus to live out of much longer. than other catfish (Haylor, ). Earthworm. the African content. Counting was done by taking the average weight of three Research was conducted on the induced spawning of samples each with hundred eggs. For computation of the the African cat fish (Clarias gariepinus) with the total number of eggs the following formula has been used: intention of evaluating the effectiveness of two differentFile Size: KB.

    Induction of triploidy with caffeine treatment in the African catfish (Clarias gariepinus) Turan, F.*; Guragac, R. Received: February Accepted: December Abstract Induction of triploidy is one of the biotechnological methods in aquaculture used for genetic manipulation. INTRODUCTION. African catfish Clarias gariepinus is a suitable alternative to tilapia in subsistence fish farming in Africa using low grade feed composed of some local agricultural and agro-industrial by-products, the yields of catfish from ponds could be as much as times higher than those of tilapia (Verreth et al., ).In addition, this species is known with its high growth .

      On the other hand, the use of predator-control method such as African sharptooth catfish Clarias gariepinus (Burchell, ) through polyculture has been considered a safe biological method for controlling unwanted reproduced fingerlings in mixed-sex tilapia population in ponds without affecting the big size tilapia (Abdel-Tawwab ).Cited by: 7. Clarias gariepinus has been considered as an ideal species for the development of aquaculture in Africa [5,18,13]. The fish has great economic importance next to Nile tilapia in Ethiopia. In nature this fish does not spawn year round, the spawning season of African catfish in the countries to North and south of the equator last fromAuthor: Sileshi Gadissa, L. Prabha Devi.


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Regulation of gonadotropin secretion in the African catfish, Clarias gariepinus (Burchell) = by Renato de Leeuw Download PDF EPUB FB2

The regulation of gonadotropin release by neurohormones and gonadal steroids in the African catfish, Clarias gariepinus. Aqua culture, The secretion of gonadotropic hormone (GTH) from the pituitary of teleosts is considered to be regulated by neuropeptides and neuroamines of cerebral origin and steroid hormones from the by: De Leeuw, R., Goos, and Van Oordt, P.G.W.J., The regulation of gonadotropin release by neurohormones and gonadal steroids in the African catfish, Clarias gariepinus.

Aqua- culture, The secretion of gonadotropic hormone. The regulation of gonado- tropin release by neurohormones and gonadal ste- roids in the African catfish, Clarias gariepinus. Aquacult De Leeuw, R., Habibi, H, R., Nahorniak, C. S., and Peter R. (b). Dopaminergic regulation of gonadotropin-releasing hormone receptor activity in the goldfish by:   De Leeuw, R., Goos, and Van Oordt, P.G.W.J.

The dopaminergic inhibition of the gonadotropin-releasing hormone-induced gonadotropin release: An in vitro study with fragments and cell suspensions from pituitaries of the African catfish,Clarias gariepinus (Burchell).

Gen. Comp. Endocrinol. – Google ScholarCited by:   ketotestosterone (OT) is a typical androgen of male teleost fish, but information on the question if it is involved in the feedback regulation of pituitary gonadotropin II (GTH-II) secretion is controversial.

We have therefore studied the effects of OT on gonadotropin releasing-hormone (GnRH) stimulated GTH-II secretion in male African catfish Clarias gariepinus).Cited by: INTRODUCTION. The African catfish, Clarias gariepinus is an important species in the aquaculture industry throughout the world.

The species has several advantages such as good taste, fast growth, resistance to low oxygen and considerable ease in farming (Pillay, ; Appelbaum and Mcgeer, ; Appelbaum and Kamler, ; Van de Nieuwegiessen et al. The present study set out to investigate the haematological effects of tobacco leaf dust on African catfish, Clarias gariepinus, fingerlings, with a mean weight of ± g using “static renewal bioassay system” during a hour bioassay exposure period.

Water quality parameters such as pH and dissolved oxygen significantly decreased while total alkalinity and conductivity Cited by: 1. The African catfish, Clarios gariepinus, a model for the study of reproductive endocrinology in teleosts.

Aquaculture, In their natural habitat African catfish, Clarias gariepinus, show a discontinuous reproductive cycle. This cycle follows changes in the gonadotropic activity of the pituitary.

Gonadotropin release. Glycoprotein gonadotropic hormone (GTH) was purified from pituitaries of male and female African catfish, Clarias gariepinus. The first step was chromatography on concanavalin A-Sepharose followed by filtration on Ultrogel chromatography on DEAE-cellulose, and filtration on Ultrogel by:   Abstract.

Male fish produce ketotestosterone as a potent androgen in addition to testosterone. Previous experiments with juvenile African catfish (Clarias gariepinus) showed that ketotestosterone, but not testosterone, stimulated spermatogenesis, whereas testosterone, but not ketotestosterone, accelerated pituitary gonadotroph development.

Cited by: Dopamine involvement in the regulation of gonadotropin secretion in coho salmon. Dopamine involvement in the regulation of Peter et al. ), African Catfish Clarias gariepinus.

Clarias gariepinus (African sharp tooth catfish), is a typical air-breathing scaleless catfish with an elongated body with long dorsal and anal fins.

It is the second most important freshwater fish, after tilapia, in Africa. According to 1, C. gariepinus, Cited by: 3. ii Abstract Catfish (Clarias gariepinus) is one of the best candidate aquaculture plays the major role on culturing fish, especially at early stages.

Various studies have found low survival rate and poor growth performance as a major. African sharptooth catfish Clarias gariepinus is a typical air-breathing catfish with a scaleless, bony elongated body with long dorsal and anal fins, and a helmet like head (Figure 1).

Colour varies dorsally from dark to light brown and is often mottled with shades of olive and grey while the underside is a pale cream to white (Skelton ). African mud catfish, Clarias gariepinus. is the most sought after farmed fish species in West Africa whose commercial breeding is done using expensive synthetic.

African catfish (Clarias gariepinus) is appreciated by consumers for the quality of its meat (Pruszyński, ) and is mostly smoked and used in soups. It is recognized by its long dorsal and anal fins, which give it a rather eel-like appearance.

The catfish has a. How to cite this article: Abdul R B, Edward K, Sogbesan O A. Comparative Studies on Clarias gariepinus Pituitary Extracts and Synthetic Hormone on Induced Spawning and Growth Performance of the African Catfish Clarias gariepinus Fry.

Dairy and Vet Sci J. ; 4(3): DOI: /File Size: KB. Abstract. The African catfish, Clarias gariepinus, from Lakes Kariba, Mcllwaine and Kyle, was investigated for sexual maturity and maturity is cyclical and seasonal, with a peak coinciding with the seasonal summer rains.

Development from non-ripe adult fish to those in the ripe stages is shown to take less than one by: The influence of administered pre spawning stressors on female African catfish, Clarias gariepinus was investigated throughout induced spawning.

It was found that no significant difference (P > ) in ovulation percentages among stressed s numbers produced by stressed females and control one. Abstract: Juveniles of Clarias gariepinus (mean weight ±SD and mean length cm±SD were exposed (three fish PC tank) to (control), and ppm cypermethrine solution in triplicates in rectangular glass aquaria for 10 days to determined the effect of.

and production of African catfish (C. gariepinus) in six cemented tanks (3m2 each) over a period of days. Three different feeds namely Feed A (Saudi-Bangla fish feed, % protein), Feed B (formulated feed, % protein) and Feed C (chicken raw intestine, % protein) were applied to treatments I, II and III respectively.

Each of the File Size: KB.The experiment was conducted to investigate the effects of different imported fish feeds on the performance of juvenile African Catfish (Clarias gariepinus).

A week feeding trial was conducted using juveniles which were randomly assigned to five treatment groups in 15 indoor plastic tanks at a stocking rate of 15 fish per tank and three (3) replicates per : Ajayi Olusina Tunde, Ojo Samson Oluwagbemiga, Adeleke Babatunde, Oluyisola Olufemi Oluseyi.Growth performance of two African catfishes Clarias gariepinus and Heterobranchus longifilis and their hybrids in plastic aquaria G A Ataguba, P A Annune and F G Ogbe Department of Fisheries and Aquaculture, University of Agriculture, P.M.B Makurdi, Benue State, Nigeria.