scholarly journals ASSOCIATION OF MICROSATELLITE GENETIC DIVERSITY WITH GROWTH RELATED TRAITS IN THE BASE POPULATION OF AFRICAN CATFISH, Clarias gariepinus, BREEDING PROGRAM

2015 ◽  
Vol 10 (1) ◽  
pp. 1
Author(s):  
Imron Imron ◽  
Bambang Iswanto ◽  
Narita Syawalia Ridzwan ◽  
Rommy Suprapto ◽  
Huria Marnis
Keyword(s):  
Genetic Diversity ◽  
Standard Length ◽  
Pearson Correlation ◽  
Clarias Gariepinus ◽  
Local Effect ◽  
African Catfish ◽  
General Effect ◽  
Group Level ◽  
Individual Level ◽  
Total Length

Genetic diversity at molecular level has been assumed to correlate with fitness related traits. However, accumulating evidences showed that the nature of that correlation has been variable. This study was aimed to explore the nature and possible mechanisms underlying that correlation by focusing on growth related traits in African catfish, Clarias gariepinus using microsatellite molecular markers. Fifty individual African catfish of 110 days-old were sampled and subjected to both morphological and molecular analyses. The standard length, total length and body weight as well as allelic scores of six microsatellite loci were measured on each individual. Indices of microsatellite diversity, namely individual multilocus heterozygosity (MLH) and mean microsatellite allelic distance (mean d2) for individual level, and mean observed heterozygosity (Ho) and single-locus heterozygosity (ho) for group level, were correlated to those traits using Pearson correlation coefficient (r). The Hardy Weinberg and linkage disequilibrium were carried out to explore the possible mechanisms underlying correlation. The results showed that at individual level the MLH and mean d2 were weakly correlated with standard length, (r=0.25, p<0.05) and (r=0.24, p<0.05), respectively. At group level, Ho was correlated with both standard and total length (r=0.99, p<0.05) while ho identified two loci, Cga03 and Cga06 significantly contributed to the correlation. Combining all relevant information, present study identified associative overdominance, both local effect and general effect hypotheses might responsible for the observed correlations.

scholarly journals Influence of feeding regimen on growth parameters of African Catfish (Clarias gariepinus, Burchell 1822)

2019 ◽  
Vol 46 (3) ◽  
pp. 192-204
Author(s):  
O. T. F. Abanikannda ◽  
A. A. Jimoh ◽  
K. O. Bakare ◽  
S. A. Shitta ◽  
Z. F. Shopeyin
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Standard Length ◽  
Condition Factor ◽  
Average Daily Gain ◽  
Clarias Gariepinus ◽  
African Catfish ◽  
Total Length ◽  
Final Weight ◽  
Feeding Regimen

An experiment was conducted using 270 African catfish fingerlings to evaluate the effects ofdifferent feeding regimen on growth performance of the fish. The fish were hatched andreared to 12 weeks under similar condition before the commencement of the experiment thatlasted for 40 days. Feeding regimens included equally shared feed based on recommended of5% body weight, and equally spaced feed allocation at 6, 8 and 12 hourly intervals. Each ofthe three treatment groups comprised of six replicates of 15 fish per plastic tank. Body weight,and two linear measurements (total and standard length) were taken twice weekly on each ofthe fish in all the tanks and the respective length-weight relationship and condition factor (K)were computed. Weekly gain, final weight, average daily gain, absolute, relative, specific andmean growth rates for the three groups were evaluated and compared. Results showed that allparameters studied except final total length were significantly (P<.05) affected by feedingregimen. The coefficient of determination for all ANOVA had variable values for all growthparameter; Final Weight (83.11%), Absolute Growth Rate (79.19%), Final Total Length(61.30%), Final Standard Length (60.87%), Relative Growth Rate (38.68%), SpecificGrowth Rate (35.57%), Mean Growth Rate (32.23%) and Condition Factor (12.83%). The 6-hourly treatment group mostly had the highest values across all the parameters studied butwas not statistically different (P>.05) from the values obtained in the 8-hourly group.

scholarly journals Genetic diversity and population structure of the African catfish, Clarias gariepinus (Burchell, 1822) in Kenya: implication for conservation and aquaculture – Corrigendum

2017 ◽  
Vol 147 (2) ◽  
Author(s):  
James E. Barasa ◽  
Sinebongo Mdyogolo ◽  
Romulus Abila ◽  
Johannes Paul Grobler ◽  
Robert A. Skilton ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Clarias Gariepinus ◽  
African Catfish

This Corrigendum does not have an abstract.

scholarly journals THE DYNAMICS OF GENETIC VARIABILITY IN THREE GENERATIONS OF MASS SELECTION FOR FAST GROWTH IN AFRICAN CATFISH, Clarias gariepinus ASSESSED BY MICROSATELLITE MARKERS

2015 ◽  
Vol 10 (2) ◽  
pp. 113
Author(s):  
Imron Imron ◽  
Bambang Iswanto ◽  
Huria Marnis ◽  
Rommy Suprapto ◽  
Narita Syawalia Ridzwan
Keyword(s):  
Genetic Diversity ◽  
Genetic Variability ◽  
Genetic Differentiation ◽  
Clarias Gariepinus ◽  
Breeding Program ◽  
Fixation Index ◽  
Mass Selection ◽  
African Catfish ◽  
Three Generations ◽  
Selection For

Selective breeding aiming at improving the performance of economically important traits acts by exploiting population’s phenotypic variance. Due to the relationship between phenotype and genotype, selection on phenotype may also affect the profile of genotype. This study was aimed to monitor the impact of three generations of mass selection for fast growth in African catfish, Clarias gariepinus, on genetic variability, assessed by microsatellite. A total of 350 fish representing four populations, namely a composite base population (G-0), selected lines of the first generation (G-1) to the third generation (G-3), were sampled. The samples were screened for their genetic diversity using five microsatellite loci1 namely cga01, cga02, cga03, cga05, and cga09. Several genetic parameters including number of allele (A), allelic richness (AR), observed (Ho) and expected (He) heterozygosity, and fixation index (Fis) were evaluated. The results showed that there was a slight increase in the value of diversity indices in the G-1 relative to the G-0 and to the other two generations. Among these parameters, the number of allele seemed to be the most sensitive parameter in detecting genetic changes. All populations experienced heterozygote deficit and positive fixation index indicating the phenomena of inbreeding. Overall, selection for growth for three generations in African catfish breeding program resulted in significant genetic differentiation between populations. Further, the level of genetic differentiation seemed to accumulate along with the number of generaton in breeding program. However, selection did not result in a decline in genetic diversity within population. A relatively short period of the program, along with the use a high number of broodstock (mating pairs) to produce each generation seems to be able to maintain the stability of genetic diversity of the population.

Crossing of African catfish, Clarias gariepinus (Burchell, 1822), strains based on strain selection using genetic diversity data

Aquaculture ◽  
2009 ◽  
Vol 290 (1-2) ◽  
pp. 53-60 ◽  
Author(s):  
Anyalak Wachirachaikarn ◽  
Wikrom Rungsin ◽  
Prapansak Srisapoome ◽  
Uthairat Na-Nakorn
Keyword(s):  
Genetic Diversity ◽  
Clarias Gariepinus ◽  
Strain Selection ◽  
African Catfish

scholarly journals Distribution and Associated Factors of Gyrodactylus Malalai Infestation in North African Catfish, Clarias Gariepinus in Ilorin, Nigeria

2021 ◽  
Author(s):  
Adeshina Ibrahim ◽  
Seyramsarah Blossom Setufe ◽  
Kaosarat Omolara Abdulwaheed ◽  
Olarinke Victoria Adeniyi
Keyword(s):  
Body Weight ◽  
Associated Factors ◽  
Clarias Gariepinus ◽  
African Catfish ◽  
North African ◽  
Predisposing Factor ◽  
Total Length ◽  
Males And Females

Abstract This study examined the occurrence and associated factors of Gyrodactylus malalai infestation in 30 cultured North African catfish in Ilorin, Nigeria. Four organs (gills, eyes, fin and skin) were collected from each fish (resulted into 180 organs) and observed for the existence of G. malalai. Fifty percent (50%) of the fish examined were infested with G. malalai. Males (30%) fish were more affected than the females (20%). Density, intensity and index of infestation were significantly different between males and females (p < 0.05). Fish with total length of 40.0 to 49.9 cm were significantly infested than fish with total length of 20.0 to 29.9 cm (p < 0.05) but body weight did not significantly affect the occurrence of G. malalai infestation (p > 0.05). Gills is most targeted organ of G. malalai infestation with higher percentage of infestation (8.33%), density of infestation (0.22), intensity of infestation (2.60), and index of infestation (3.25) than the eye with 2.22, 0.06, 1.57, and 0.43, respectively (p < 0.05). In conclusion, Gyrodactylus malalai infestations are high in North African catfish and could multiply rapidly and could lead to mortality if not properly managed. Furthermore, total length is identified as the predisposing factor for G. malalai infestation in fish

scholarly journals EMBRYONIC AND LARVAL DEVELOPMENT OF A RED STRAIN OF THE EGYPTIAN AFRICAN CATFISH (Clarias gariepinus Burchell, 1822)

2015 ◽  
Vol 10 (1) ◽  
pp. 19
Author(s):  
Bambang Iswanto ◽  
Imron Imron ◽  
Rommy Suprapto ◽  
Huria Marnis
Keyword(s):  
Larval Development ◽  
Clarias Gariepinus ◽  
African Catfish ◽  
Body Colour ◽  
Total Length ◽  
Yellow Body ◽  
Embryonic And Larval Development

Egyptian African catfish is one of several African catfish (Clarias gariepinus) strains introduced to Indonesia. Several breeding activities using that strain in Sukamandi resulted in some individuals with redish-yellow body colour (a red strain). Biological informations related to aquacultural aspects of that red strain were still scarce. The present study aimed to elucidate the embryonic and larval developments of the red strain compared to those of the black (normal coloured) one, using the progenies obtained from artificial spawning of each red and black coloured brooders. Results of the present study revealed that embryonic developments of the red and black strains were similar. Their larval development were also quite similar, however, both larvae could be distinguished based on the pigmentation. The red strain larvae were golden-red-yellowish in colour, while the black strain larvae were greyish covered with dense melanophores. Total length of the red strain larvae tended to be lower than those of the black strain.

scholarly journals Supplemental enzyme in artificial diets for north african catfish larvae Clarias gariepinus Burchell, 1822

2020 ◽  
Vol 20 (2) ◽  
pp. 155
Author(s):  
Ucu Cahyadi ◽  
Dedi Jusadi ◽  
Ichsan Ahmad Fauzi ◽  
Ade Sunarma
Keyword(s):  
Growth Performance ◽  
Clarias Gariepinus ◽  
Fish Growth ◽  
Size Group ◽  
Medium Size ◽  
Control Group ◽  
African Catfish ◽  
Artificial Diets ◽  
Total Length ◽  
Group 2

Supplemental enzyme in artificial diets with difference doses for African catfish Clarias gariepinus (initial weight of 0.0048±0.0001 g and total length 0.7633±0.0392 cm) were examined for 12 days feeding trial. The aim of this study was to analyze the effectiveness supplemental enzymes in diets for growth performance of catfish larvae. Tubifex sp. (control) and a multi enzyme was included at the level of 0.00 (ME0), 1.00 (ME1) and 2.00 g kg-1 (ME2 diet as a test diets. Each of the four experimental diets was randomly assigned to four plicate groups. Larva was allocated into 150 L aquaria at a density of 1350 larvae per aquarium. Data was analyzed using SPSS 20, followed by Duncan’s test. The result showed that the survival rate and condition factors were no statistical difference between experimental diets and control group. The highest final length, final weight, total food consumption, villi length and enzymes activity  were recorded in the Control (P<0.05) and significantly different with other treatments. Feed efficiency’s control significantly different with other. Harvest size distribution, in the small size group (1-2 cm) did not show significantly different, in the medium size group (2-3 cm) and large size group (3-5 cm) the Tubifex sp. treatment were significantly different from the other treatments (P<0.05) whereas between ME0, ME1 and ME2 treatments were not significantly different. Among the supplemental enzyme in test diets, ME2 can improve weight and total length 6.25% and 13.4%, respectively than ME0 treatment. The results suggested that enzyme supplementation can improve intestinal structure and growth performance of catfish larvae. The supplemental enzyme in diets with doses up to 2 g kg-1 can increase intestinal villi’s length but have not been able to increase fish growth performance as use worm.

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