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All Journal Acta Aquatica: Aquatic Sciences Journal Indonesian Journal of Agricultural Research
Kiamfu, Victor Pwema
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Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance Environmental Science Materials Science & Nanotechnology Social Sciences Veterinary Other

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Grow-out of Oreochromis niloticus (Linnaeus, 1758) fish (Perciformes, Cichlidae) on Local Feed in an Above-ground Tank Culture System in Kinshasa, Democratic Republic of Congo Kiamfu, Victor Pwema; Luila, Josette Mbaki; Kumutima, Berthe Kazaba; Matondo, Alex Mayoni; Nzege, Christian Yaga; Lusasi Swana, Willy
Indonesian Journal of Agricultural Research Vol. 6 No. 1 (2023): InJAR, Vol. 6, No. 1, March 2023
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/injar.v6i2.9495

Abstract

 Acquiring land that meets the required standards for lowland ponds is becoming an increasing problem in the city of Kinshasa in the Democratic Republic of Congo, and fish farming in above-ground concrete tanks is emerging as an alternative. The objective of this study was to follow the evolution of pre-growth of Oreochromis niloticus Linnaeus, 1758 in an above-ground concrete tank culture system using feed based on local agricultural by-products available in Kinshasa. A total of 198 fries were distributed in 3 tanks and fed three times a day. The experiments were conducted for 60 days between August and November 2021. The results obtained indicate a better survival rate (T1 = 75.75±4.32%; T2 = 60.6±9.76% and T3 = 83.33±4.96%). Feed T1 (mean weight = 33.15±2.78 g) and T2 (28.44±3.76 g) had a positive impact on fish weight growth. The cost of producing one kilogram of a feed ration varied depending on the ingredients used. It cost 2,843 FC to develop the T1 feed, 951 FC to produce the T2 feed and 5.000 FC to afford the T3 commercial feed sold in Kinshasa. Ration T2 is the one that gave a better compromise of price and quality by promoting good fish growth at a lower cost (1,692 Congolese Francs) than the other two feeds. These observations sufficiently show that during the experiment, the experimental structure (concrete tank) did not have negative effects on the zootechnical performance of the fry of the fish species studied. The economic aspect of the use of feed rations by fry showed the merits of rearing fish using local agricultural by-products rather than commercial feed. This study showed the merits of setting up an above-ground concrete tank fish farm to overcome the difficulty of acquiring land to meet fish farming requirements.
Fishing techniques used for the exploitation of fish in the flooded swamp forest of the Lake Tumba micro-basin on the Mbandaka-Center for Research in Ecology and Forestry (CREF Mabali) road axis in Bikoro in the Equateur Province (R.D Congo) Mondzoi Ndinga, Adrien Boika; Swana, Willy Lusasi; Kilingwa, Clément Munganga; Mutanda, Santos Kavumbu; Kiamfu, Victor Pwema; EyulAnki, Dieudonné Musibono
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Jurnal Ilmu Perairan, Vol. 10: No. 1 (April, 2023)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v1i2.8758

Abstract

The objective of this study was to inventory the different fishing techniques used for the exploitation of fish in the flooded swamp forest of the Lake Tumba micro-basin on the Mbandaka-Center for Research in Ecology and Forestry (CREF Mabali) road axis in Bikoro in the Equateur Province of the Democratic Republic of Congo. The exchange-based surveys were carried out using a pre-established survey form to exchange with the fishermen working in the different study sites in order to obtain the expected data. The harvesting of fish was done in a traditional manner using the different fishing gears and techniques used by the fishermen in the study area. The results obtained show that the majority of the fishing practices implemented in this area are not sustainable. In total, ten (10) fishing techniques were identified, among which five (5) easily provide fish, namely, creel fishing, scooping, fishing with ichthyotoxic plants, longline fishing and line fishing, which are the most used by the fishermen. Four fishing techniques (fishing with traditional traps, scooping, fishing with ichthyotoxic plants and fishing by weeding the areas) were considered non-selective and capable of creating an imbalance in the different aquatic ecosystems surveyed. This study contributes to the improvement of the knowledge on the exploitation of the animal biodiversity of the Democratic Republic of Congo, on the one hand, and on the other hand, the perpetuation of the knowledge of the local population whose obsolete character is not in doubt.Keywords: Fishing techniques, Fishing gear, Ichthyological fauna, Bikoro, D.R. Congo
Co-Authors EyulAnki, Dieudonné Musibono Kilingwa, Clément Munganga Kumutima, Berthe Kazaba Luila, Josette Mbaki Lusasi Swana, Willy Matondo, Alex Mayoni Mondzoi Ndinga, Adrien Boika Mutanda, Santos Kavumbu Nzege, Christian Yaga Swana, Willy Lusasi