Reproductive performance of partial gonadectomized male African catfish, Clarias gariepinus broodstocks

Adebayo, Olabode Thomas; Fasakin, E. A.; Adewumi, J.A.

doi:10.1016/j.theriogenology.2011.09.027

Cited by 14 publications

(22 citation statements)

References 9 publications

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“…For calculating percent fertilisation, a sample from each replicate of each treatment were carefully collected on a petri dish containing water and the number of fertilised and unfertilised eggs were counted under a binocular microscope (x 10) (Adebayo, 2006). The fertilisation rate was then calculated by the following equation according to Adebayo (2006).…”

Section: Reproductive Performance Parametersmentioning

confidence: 99%

“…After hatching, the numbers of hatchlings within each batch were carefully counted and the hatching rate was calculated using the following equation according Adebayo (2006).…”

Section: Reproductive Performance Parametersmentioning

confidence: 99%

“…Survival rate was also determined as follows (Adebayo, 2006): Survival Rate = (Number of hatchlings alive to larva stage / Total number of hatchings) x 100…”

Section: Reproductive Performance Parametersmentioning

confidence: 99%

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Ndimele¹,

Owodeinde²

2012

Turk. J. Fish. Aquat. Sci.

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A study was conducted to determine the comparative reproductive, growth performances and nutrient utilization of Clarias gariepinus and its hybrid "heteroclarias" using ovaprim and pituitary extract of male and female C. gariepinus. The experimental broodstocks consisted of 6 female C. gariepinus (2 each were induced separately with ovaprim, male pituitary of C. gariepinus and female pituitary of C. gariepinus), 3 male C. gariepinus and 3 male Heterobranchus bidorsalis. 2 female C. gariepinus induced with synthetic hormone were crossed separately with male C. gariepinus and male H. bidorsalis. A similar crossing was done for the other two sets of female C. gariepinus induced with male and female pituitary glands. The result shows that there was significant difference (P<0.05) among the treatments in all the reproductive performance, growth and nutrient utilization parameters. The highest percentage fertilization (88.44±5.74%), feed intake (27.48±7.08g), protein intake (15.39±3.96g), feed conversion ratio (1.21±0.12) and protein efficiency ratio (1.68±0.19) were recorded in pure line C. gariepinus induced with ovaprim. Pure breed C. gariepinus also had the highest values in all the reproductive performance and growth parameters. This study has shown that C. gariepinus induced with synthetic hormone (ovaprim) produce offspring with better qualities than those induced with pituitary.

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Section: Reproductive Performance Parametersmentioning

confidence: 99%

“…After hatching, the numbers of hatchlings within each batch were carefully counted and the hatching rate was calculated using the following equation according Adebayo (2006).…”

Section: Reproductive Performance Parametersmentioning

confidence: 99%

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Ndimele¹,

Owodeinde²

2012

Turk. J. Fish. Aquat. Sci.

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“…(, ); Olaniyi and Omitogun (, , ), and Kiriyakit, Gallardo and Bart (). While, Adebayo (); Owodeinde and Ndimele () and Akinwande, Fagbenro and Adebayo () estimated fertilization rate about 20 m when the egg development was at the 4 and 8 cell stage. However, a number of studies are silence about the time of fertilization determined (Adebayo & Fagbenro, ; Sahoo, Giri, Sahu & Ayyappan, ), while other studies did not report detail or give citations of the protocol used for fertilization determination (e.g.…”

Section: Photographic Changes and Description Of Fertilized And Hydramentioning

confidence: 98%

A simple technique for accurate estimation of fertilization rate with specific application toClarias gariepinus(Burchell, 1822)

2017

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The production of fish in captivity necessitates the use of artificial means for its propagation. This process involves the collection and mixing of both male and female gametes to form a developing embryo (Ataguba, Okomoda & Onwuka, 2013). However, this is not 100% successful hence, the need to estimate the percentage of the egg fertilized during the process of artificial spawning. This is also one of the ways of measuring gamete quality of broodstocks and their progenies (Carrillo et al., 2000). The most widely used method to estimate fertilization rate in previous studies is that described by Ella (1987). This involves monitoring a small portion of the unfertilized egg from the time of stripping until the eggs become completely opaque (dead). Then, a subsample of the fertilized egg is taken through capillary action with the aid of a glass tube (300 mm length and 2.5 mm diameter), and the total numbers of the good (live) and bad (dead) eggs are counted. The percentage of the good eggs is then estimated as the fertilization rate. This method assumes that all good eggs at this point are fertilized while the white/opaque (bad) eggs are unfertilized (Ataguba, Annune & Ogbe, 2010). However, the above method is flawed due to several reasons; it takes several hours for the referenced standard of unfertilized eggs to become opaque hence, making the estimation of fertilization a time-consuming process. Values gotten from this method are also inaccurate due to the fact that some fertilized eggs die during the process of embryogenesis and add up to the percentage of bad eggs (dead egg) which is erroneously thought to be 100% unfertilized eggs. More so, the unfertilized eggs amidst the fertilized eggs are usually hydrated with water while the reference standard of unfertilized eggs is not. Hence, the biological response of the hydrated eggs and the time taken to become opaque differ significantly compared with the standards (which is non-hydrated and unfertilized). There is, therefore, a need to develop a more suitable method which could distinguish "hydrated" and "fertilized" eggs earlier in the embryogenesis process hence, the aim of this research. The working hypothesis for this study, therefore, is to discriminate "fertilized" and "hydrated" eggs using the shape of the animal pole during different stages of embryogenic development. The stages which gave the highest possibility for easy discrimination were identified and suggested as the best stages for accurate estimation of fertilization rate.For this study, we used the breeding of Clarias gariepinus (Burchell, 1822) as a specific example. Two pairs of sexually mature broodstocks (each for male and female) of C. gariepinus (Burchell, 1822),(1 year old and weigh between 1 and 1.3 kg) were obtained from the School of Fisheries and Aquaculture Sciences hatchery of the Universiti Malaysia Terengganu, in Malaysia. They were maintained in rectangular fibreglass tanks (fed 35% Crude Protein commercial diet) until the time of breeding. Female broodstocks were given intramuscu...

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“…Fortnight measurements were carried out for weight (to the nearest g) with an electric balance and total length (to the nearest mm) with a measuring scale for larvae, fry and fingerlings from each treatment (breed). Length gain, weight gain and specific growth rate (SGR) were determined by formula adopted from Adebayo (2006) Where W1is the initial fish weight (g) at time T1 (day) and W2 is the final fish weight at time T2 (day).…”

Section: Growth Performancementioning

confidence: 99%

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Tilahun¹,

Dube²,

Chtruvedi³

et al. 2016

Turk. J. Fish. Aquat. Sci.

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Hybridization was conducted to compare performance of hybrids to their parental line of the pure Clarias gariepinus and Clarias batrachus crosses as a control in triplicates for a period of 60 days, with fortnightly sampling. The hybrid crosses showed intermediate characters between the control crosses in mean weight gain (MWG), specific growth rate (SGR) mean final length (MFL) and survival of fingerlings (SF). However, the hybrids revealed lower characters compared to the progeny of control groups in fertilization rate, hatching and survival of larvae. On the other hand, fertilization and hatching rate among the hybrids and the control batrachus species were statistically insignificant (P>0.05). Similarly, no significant difference (P>0.05) was observed between the two inter-specific hybrids. Though the crosses of C. gariepinus displayed significantly higher value in MWG, SGR, SL and FML than other groups, fingerling survival was found to be lowest. The growth parameters like MWG, SGR and FML of the hybrids were found to be higher than C. batrachus crosses, while survival of hybrid fingerlings were higher than C. gariepinus. Therefore, this is considered as heterosis vigor for the hybrids for that they have achieved better traits either one of the control groups.

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Reproductive performance of partial gonadectomized male African catfish, Clarias gariepinus broodstocks

Cited by 14 publications

References 9 publications

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A simple technique for accurate estimation of fertilization rate with specific application toClarias gariepinus(Burchell, 1822)

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