Analysis of production, early growth and survival ofClarias gariepinus (Burchell),Heterobranchus longifilis (Val.) (Pisces: Clariidae) and their F1 hybrids in ponds

Nwadukwe, F. O.

doi:10.1007/bf02336048

Cited by 8 publications

(5 citation statements)

References 12 publications

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“…For viable hatchlings, a maternal effect was found in hybrids because hybrids and their maternal species had been produced from the same female, and therefore the quality of eggs was identical. This phenomenon is not only limited to these hybrids because it was already observed for other species 15 and hybrids 16 . Laine and Rajasilta, 17 McCormick 18 and Steer et al 14 .…”

Section: Discussionsupporting

confidence: 51%

Hybridization success of three common European cyprinid species, Rutilus rutilus, Blicca bjoerkna and Abramis brama and larval resistance to stress tests

et al. 2007

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Hybridization success at early developmental stages and larval resistance to osmotic, thermal and fasting tests in roach Rutilus rutilus, silver bream Blicca bjoerkna, common bream Abramis brama and their F1 hybrids were investigated. Results revealed that hybrid survival rates were similar to parents. At the eyed embryo stage, however, a maternal effect was observed as a general trend during hatchling and larval stages. After these stages, hybrids displayed a higher survival rate than their parents. Under stress tests, no survival was observed after 40 min for osmotic and thermal shocks and after 24 days for the prolonged fasting test in these species and their F1 hybrids. The median survivals of hybrids were intermediate between the two parents. For total mortality, hybrids were also affected by a maternal effect but to the advantage of the hybrids.

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Section: Discussionsupporting

confidence: 51%

Hybridization success of three common European cyprinid species, Rutilus rutilus, Blicca bjoerkna and Abramis brama and larval resistance to stress tests

et al. 2007

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“…This hybrid is a product from the cross between Heterobranchus longifilis x Clarias gariepinus . Nwadukwe (1995) observed that this hybrid could be obtained in commercial quantity. It grows fast and has a high survival rate.…”

Section: Introductionmentioning

confidence: 91%

Growth and Feed utilization of Catfish Hybrid (Heterobranchus longifilis x Clarias gariepinus ) Fingerlings fed practical diets

Keremah¹,

Deekae²,

Akalokwu³

2013

GJAS

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The effects of four practical diets (3 commercial and one locally prepared) on growth, feed utilization and survival of catfish hybrid (Heterobranchus longifilis x Clarias gariepinus ) fingerlings were compared in plastic aquaria in triplicates for 56days. Diets differed in crude protein (CP) and digestible energy as follows: Commercial Diet 1 (39.73% CP, 3911.8Kcal/kg), Diet 2 (34.50% CP, 3926.8Kcal/kg), Diet 3 (45.37%, 3883.6Kcal/kg) and local Diet 4 (40.34% CP, 3861.8Kcal/kg). Observations made indicated higher performance in weight and percent weight gain (2.299g, 411%), specific growth rate (0.78% day -1 ), condition factor (0.96), feed conversion ratio (2.67) and protein efficiency ratio (10.73) for fingerlings fed Diet 3 than other diets. Commercial Diet 2 appeared to perform least among the test diets. Fish survival was high and varied between 76.7% (Diet 4) and 96.7% (Diet 1). These results demonstrated that catfish hybrid fingerlings can be successfully reared in aquaria with good feed conversion, growth and high survival on commercially or locally prepared diets with 45.37% CP and adequate energy.

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“…Hybridization is one of the genetic improvements in aquaculture industry which has been recognized as a tool for stock improvement and management purposes. Several studies have demonstrated that Clarias gariepinus × Heterobranchus bidorsalis hybrid exhibit superior growth, improved survival and general hardiness than true breed of either Clarias gariepinus or Heterobranchus bidorsalis [6][7][8][9]. These hybrids have been reported to show heterosis which ABSTRACT makes it a very good aquacultural candidate [10][11].…”

Section: Introductionmentioning

confidence: 99%

Comparative Effect of Different Stocking Densities of Heteroclarias on Plankton Abundance in Tarpaulin Tanks

Edet Afia,

Samuel David,

Bassey Effiong

2018

J Aquat Sci Mar Biol

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The effect of different stocking densities of hybrid catfish (Heteroclarias) on plankton abundance in tarpaulin tanks was studied for a period of six ( 6) months (January -June 2016). The study employed Complete Randomized Design (CRD) experimental design. Five different stocking densities (treatments) were employed (T 1 = 100fish/m 2 , T 2 = 75fish/m 2 , T 3 = 38fish/m 2 , T 4 = 18fish/m 2 and T 5 = 9fish/m 2) . These were replicated three times. Filtration technique was employed. Mesh size plankton net (25µm) was used to filter 10L depth integrated water samples. The water samples (net content) were emptied into a wide mouth plastic container and preserved in 5% formalin solution after proper labeling. The samples were then taken to the laboratory and were allowed to stand for at least 24hrs in the laboratory for the plankton to settle. The samples were pipetted (1ml sample) with sample pipette. The content was placed in a Sedgewick-Rafter plankton-counting chamber and examined under a magnification of 500× and 1000×. The plankton were identified, enumerated and total number of species were also recorded using keys and check lists. For phytoplankton, a total of eighty-three ( 83) species belonging to six (6) taxonomic groups were observed in the experimental tanks. Bacillariophyceae occurred highest and was represented by thirty-six (36) species. Chrysophyceae and xanthophyceae occurred least with one (1) species respectively. For zooplankton, a total of twenty (20) species belonging to four (4) taxa were identified during the study. Cladocera occurred highest with nine (9) species, while protozoa occurred least with two (2) species. T 5 (9fish/m 2 ) had the highest abundance of phytoplankton and zooplankton. T 1 (100fish/m 2) had the least abundance of phytoplankton and T 2 (75fish/m 2 ) had the lowest abundance of zooplankton. Therefore, a stocking density of 9fish/m 2 of heteroclarias is optimal and is recommended in order to maintain better plankton presence and good environmental condition.

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Analysis of production, early growth and survival ofClarias gariepinus (Burchell),Heterobranchus longifilis (Val.) (Pisces: Clariidae) and their F1 hybrids in ponds

Cited by 8 publications

References 12 publications

Hybridization success of three common European cyprinid species, Rutilus rutilus, Blicca bjoerkna and Abramis brama and larval resistance to stress tests

Hybridization success of three common European cyprinid species, Rutilus rutilus, Blicca bjoerkna and Abramis brama and larval resistance to stress tests

Growth and Feed utilization of Catfish Hybrid (Heterobranchus longifilis x Clarias gariepinus ) Fingerlings fed practical diets

Comparative Effect of Different Stocking Densities of Heteroclarias on Plankton Abundance in Tarpaulin Tanks

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