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  • 1
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    Response of Oreochromis niloticus to graded levels of crude proteins (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24086 | 19325 | 2018-05-12 14:22:57 | 24086 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Completely randomized design with triplicates was used to carry out twelve weeks nutrimental experiment to determine the exact crude protein (CP) requirement specifically for, optimal growth performance of Oreochromis niloticus fry that has adapted to the New Bussa environmental condition with the objective of producing all-male tilapia from the brood stock stage. Graded levels (25, 30, 35 or 40 %) of crude protein diets were fed to 20 fry per replicate in aquaria. There were significant differences in the feed consumed, specific growth rate and final weight (P〈0.05) although there was no significant difference in feed conversion ratio (p〉 0.05) of the different groups that fed on the four diets. There were also significant differences (P〈 0. 05) in the whole body proximate composition of fish groups with the significant maximum crude protein occurring in the group fed with 40 %CP and maximum lipid in 25% CP group (P〈 0. 05) indicating excessive accumulation of lipid when low protein diets are fed to O. niloticus. It was recommended that 40 % CP might be most ideal for O. niloticus fry that had adapted to Kainji environmental condition.
    Description: Includes; 3 tables;Also includes: 17 refs.
    Keywords: Aquaculture ; Oreochromis niloticus ; Nigeria ; Oreochromis niloticus ; fry ; Crude protein ; all-male tilapia ; freshwater environment ; Growth rate ; Fish ; Animal nutrition ; Fry ; Environmental conditions ; Primary production ; Nutritional requirements ; Proteins ; Aquaculture
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 123-127
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  • 2
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    Intraspecific hybridization studies in three strains of Clarias gariepinus (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23022 | 19325 | 2018-03-05 09:09:30 | 23022 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-12
    Description: Intraspecific hybridization studies were carried out in three strains of Clarias gariepinus obtained from three ecological zones in Nigeria: rainforest; (Onitsha strain), Guinea savanna, Kainji strain) and Montanne vegetation, (Jos strain) with the aim of improving the growth performance of the species. Nine genetic mating combinations were generated from the three strains and were successfully induced under controlled hatchery conditions. Indoor and outdoor growth parameters were monitored. The 19 days growth indoors showed significant difference (P〈O.05) in weight gain. Highest weight gain (2.76g) was obtained in Jos parental strain and cross involving female Jos and male Kainji, while the least was recorded in female Kainji and male Onitsha (0.062g). The 50 days outdoor growth performance also showed significant difference between the genetic mating combinations. Maximum weight gain (464.57g) was observed in female Kainji and male Onitsha, while female Jos and male Kainji gave 263.94g weight gain. There was no significant difference (P〉0.05) in length in both indoor and outdoor rearing. Based on this study, the cross-involving female Kainji and male Onitsha is recommended for fingerling production of Clarias gariepinus.
    Description: Includes:- 4 tables.;1 fig.;4 refs.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; freshwater environment ; Hybridization ; Breeding ; Genetics ; Hybrid culture
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 229 - 233
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  • 3
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    Hatchability and survival of H. longifilis fertilized at varying latencies (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23307 | 19325 | 2018-03-30 15:16:37 | 23307 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: In determining the optimum latency period of H. longifilis, of which the hatchability and higher Survival percentage were used as a determining factors to determine the optimum latency period of H. longifilis. The result from these varying latencies period shows that the best latency periods at the ambient temperature of 26degreesC, that support mass production and higher survival of H longifilis ranges between 15-19 hours. There was low or zero hatchability from the egg stripped early and the one stripped late.
    Description: Includes:- 1 table.;8 refs.
    Keywords: Aquaculture ; Heterobranchus longifilis ; Nigeria ; Hatching ; Survival ; Breeding ; Induced breeding
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 140-143
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  • 4
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    Growth improvement of F1 generation of Clarias gariepinus through selective breeding (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23309 | 19325 | 2018-03-30 15:18:56 | 23309 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Selective breeding studies were carried out in four genetic mating combinations of Clarias gariepinus with the aim of improving its growth performance. F2 intraspecific and backcross were produced using the best male and female of the best genetic mating combination in the F generation in crosses of three wild strains of Clara gariepinus. The highest percentage hatchability (75%) was recorded in female Kainji parental and male Kainji F1. and the least (53.67%) in female and Male Kainji Fl. The cross involving female Kainji F1. and Male Kainji Parental had the best survival (49%) indoor and also best (38.67%) outdoor, while the least (37.67%) was recorded in female Kainji parental and Male Kainji F1 and also gave the least (32.67%) outdoor. The female Kainji F1, and male Kainji parental gave the best growth performance (1.61 g) at 19 days indoor rearing, while female and male Kainji parental gave the least (1.50g). At the end of seven months rearing outdoor, the female Kainji parental and male Kainji F1. gave the best growth performance of(222.49g) and the least (180.66) was recorded in female Kainji F1 and male Kainji parental.
    Description: Includes:- 3 tables.;2 figs.;14 refs.
    Keywords: Aquaculture ; Fisheries ; Clarias gariepinus ; Nigeria ; Fish genetics ; fish breeding ; freshwater environment ; Genetics ; Breeding ; Fish culture ; Growth rate ; Hybrid culture ; Hybrids
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 147-152
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  • 5
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    An exposition on field identification of Clariid catfishes as an important tool in fish breeding and genetics (2021)
    In:  http://aquaticcommons.org/id/eprint/4024 | 424 | 2011-09-29 16:39:24 | 4024 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-06-28
    Description: This paper conducts an exposition on the field identification of Clariid catfishes Heterobranchus, Clarias and their hybrid as an important tool in fish breeding and genetics. The paper explained the classification and aquacultural importance of Clariid catfishes. Parameters necessary for fish identification were highlighted. The identification of Heterobranchus, Clarias, their hybrid and sexual differences were also identified. The paper is of the position that the identification of Heterobranchus, Clarias and their hybrid is important in their genetic conservation and in achieving success in breeding and genetic studies
    Keywords: Aquaculture ; Biology ; Nigeria ; breeding ; fish ; fish culture ; identification keys ; Clarias anguillaris ; Clarias gariepinus ; Clarias lazera ; Clarias mossambicus ; Heterobranchus bidorsalis ; Heterobranchus longifilis
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 185-192
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