Influence of 17-alpha methyl testosterone on the production parameters of common carp (Cyprinus carpio L.) fry

During our research we aimed at finding an answer as to what extent the different concentrations of 17-alpha methyl testosterone incorporated in the diet of common carp fries can influence the production parameters of the species, as well as how efficient their sexreversal can be with the use of this method. To this end, an aquarium experiment was conducted in the course of which four different hormone treatments were set and monitored. The fish feed was enriched with 17-alpha methyl testosterone in 50 ppm, 75 ppm, 100 ppm, 500 ppm dosages. The obtained figures revealed that the hormone treatments had no influence on the production parameters and conservation of the common carp fries. Further on, our team is to determine the sex of the fish through the examination of gonads during autopsy when they reach the 500 g average weight. Furthermore, a male specific test method which was supposed to be of great help in our attempt to select the sex-reversed specimens in the subsequent processes was also put to the trial. During the experiment the DNA-isolation of different sample types (muscle tissue, fin, mucus) of common carp with identified sex was successfully carried out. The extracted PCR product was examined with agarose gel. Our results indicated that the ccmf2 marker was applicable, however, the obtained figures were not reliable.

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Study of the Interaction Between Common Carp (Cyprinus carpio) and Silver Crucian Carp (Carassius auratus gibelio Bloch)

Acta Agraria Debreceniensis ◽

10.34101/actaagrar/16/3281 ◽

2005 ◽

pp. 9-12

Author(s):

Péter Bársony ◽

László Pócsi ◽

András Szabó

Keyword(s):

Common Carp ◽

Growth Rates ◽

Crucian Carp ◽

Fish Farming ◽

Average Weight ◽

Silver Crucian Carp ◽

Lower Growth ◽

Common Carp Cyprinus Carpio ◽

The Common ◽

Stocking Rates

Some of the main questions in the fish farming are the good manuring and the success of the feeding. For the best result is very important that only those fishes take place in the fishponds what we want. It seems to be easy but difficult to do. One of the main challenges of the successful fish production in fishponds, is to rid ponds of the silver crucian carp. In the course of the experiment, carp fry were stocked in 5 nursing ponds at the same stocking rate, with different (0-, 50-, 100-, 150-, 200%) stocking rates of silver crucian carp fry, respectively. During the rearing season, weekly test fishings were made to control the growth of the fishes. At the end of the experiment, the yield/hectar and the growth rates were calculated. The experiment proved that the presence of the silver crucian carp in the fishponds causes lower growth rates and productivity in common carp. In the control pond (without silver crucian carp), the average weight of the common carp was 25 g and the yield/hectar was over 900 kg, while in the pond with the most silver crucian carp, the average weight of the common carp was 9 g and the yield/hectar was only 158 kg.

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Study of the Interaction Between Common Carp (Cyprinus carpio L.) and Silver Crucian Carp (Carassius auratus gibelio B.)

Acta Agraria Debreceniensis ◽

10.34101/actaagrar/13/3374 ◽

2004 ◽

pp. 16-19

Author(s):

Péter Bársony ◽

László Pócsi ◽

András Szabó

Keyword(s):

Common Carp ◽

Growth Rates ◽

Carassius Auratus ◽

Crucian Carp ◽

Average Weight ◽

Silver Crucian Carp ◽

Common Carp Cyprinus Carpio ◽

Lower Productivity ◽

The Common ◽

Stocking Rates

During the last few years, the spread of the silver crucian carp caused significant problems in pond fish culture. One of the main challenges of the successful fish production in fishponds, is to rid ponds of the silver crucian carp. In the course of the experiment, carp fry were stocked in 5 nursing ponds at the same stocking rate, with different (0-, 50-, 100-, 150-, 200%) stocking rates of silver crucian carp fry, respectively. During the breeding season, weekly test fishings were made to examine the growth of the fishes. At the end of the experiment, the yield/hectar and the growth rates were calculated. The experiment proved that the presence of the silver crucian carp in the fishponds causes lower productivity and growth rates in common carp. In the control pond (with no silver crucian carp), the average weight of the common carp was over 20 g and the yield/hectar was over 700 kg, while in the pond with the most silver crucian carp, the average weight of the common carp was 4.5 g and the yield/hectar was only 123 kg.

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First Record of Argulus japonicus (Crustacea: Branchiura) on Cyprinus carpio in Nepal, with Additional Notes on Morphology and Prevalence of A. Japonicus and Its Treatment

Nepalese Veterinary Journal ◽

10.3126/nvj.v34i0.22911 ◽

2017 ◽

Vol 34 ◽

pp. 119-127 ◽

Cited By ~ 1

Author(s):

A. Rayamajhi ◽

S. K.C. ◽

S. G.C. ◽

P. Kunwor

Keyword(s):

Common Carp ◽

Body Surface ◽

Cyprinus Carpio ◽

Prevalence Rate ◽

First Record ◽

The Body ◽

Biological Behavior ◽

Average Weight ◽

Fish Feed ◽

Poor Growth

The present study recorded the parasite Argulus japonicus (Crustacea: Branchiura) as the first discovery in Nepal. The description was based on using 11 males (4.12 mm average TL) and 5 females (4.18 mm average TL) of Argulus japonicus which were collected from Godawari fish farm, Lalitpur. Biological behavior of one summer old common carp (Cyprinus carpio) infected with Argulus japonicuswere sluggish movement, jumping and poor growth grown in earthen pond in winter at water temperature 15.5 ºC and pH 7.4. Heavily infected fishes showed brown-grey to reddish points throughout their body surface, especially on the caudal fins and on the body portion. Prevalence rate of this parasite was 80% in infected common carp fish with an average weight 261.80±85.12 g and length 22.9±4.9 cm. Argulus mean intensity count was averaged 10.2 per infected fish with relatively high infestation in body surface (2.8±3.9) followed by caudal fin (1.8±4.5) and dorsal fin (1.1±1.5). Prevalence rate of this parasite in treated common carp reduced by 95% and Argulids assembled in several regions of the fish was in average 0.1/treated fish by feeding Duroclean treated feed. Duroclean, an aquaculture drug was found effective to control this parasite. The effective dose of the drug was 0.3 g per kg fish feed and fed for 3 days consecutively with one day off and then again for 2 days.

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A novel male-specific DNA sequence in the common carp, Cyprinus carpio

Molecular and Cellular Probes ◽

10.1016/j.mcp.2009.04.004 ◽

2009 ◽

Vol 23 (5) ◽

pp. 235-239 ◽

Cited By ~ 21

Author(s):

Jianjun Chen ◽

Youli Wang ◽

Yuanyuan Yue ◽

Xiaohua Xia ◽

Qiyan Du ◽

...

Keyword(s):

Dna Sequence ◽

Common Carp ◽

Cyprinus Carpio ◽

Common Carp Cyprinus Carpio ◽

Carp Cyprinus Carpio ◽

The Common ◽

Male Specific

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EVALUATION OF PTYCHOBOTHRIDEAN CESTODES USING RANDOM AMPLIFIED POLYMORPHIC DNA (RAPD) MARKERS FROM FRESH WATER FISHES IN GODAVARI BASIN (M.S.) INDIA

FLORA AND FAUNA ◽

10.33451/florafauna.v23i2pp461-467 ◽

2017 ◽

Vol 23 (2) ◽

Cited By ~ 1

Author(s):

SUNITA BORDE ◽

ASAWARI FARTADE ◽

AMOL THOSAR ◽

RAHUL KHAWAL

Keyword(s):

Fresh Water ◽

Rapd Markers ◽

Random Amplified Polymorphic Dna ◽

Band Pattern ◽

Genomic Variation ◽

Polymorphic Band ◽

Rapd Profile ◽

Band Size ◽

Pcr Product ◽

The Common

Ptychobothridean genera like Senga and Circumoncobothrium are the common parasites of fresh water fishes. The genotypic study of these parasites was taken by RAPD. The RAPD profile of these two parasites were not similar to each other as depicted by the band pattern in picture. These results suggest the presence of inter-specific polymorphism among cestode parasites of two different genera for RAPD analysis. The present study demonstrated that genetic differentiation of cestode parasites could be accomplished on the basis of genomic variation with polymorphic band pattern using RAPD. All the detected bands (PCR product) were polymorphic and band size ranged from 500-5000 bp in length. The RAPD of profiles using GBO-31, GBO-32, GBO-33, GBO-34, GBO-35 and GBO-36. Primers were able to characterize inter-specific polymorphism among the two genus ( Senga and Circumoncobothrium ). Genetic analysis suggests that Senga and Circumoncobothrium show genetic diversity with respect to RAPD patterns using all the six primers used for the present study. The genetic distance between the analyzed genuses ranged from 0.14 to 0.80. The differentiation of the two parasites on the basis of genetic markers could greatly facilitate study on the biology of these parasites.

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