Article

Economic Analysis of Nile Tilapia (Oreochromis niloticus) Production in Tanzania

Aquaculture and Fisheries, University of Arkansas at Pine Bluff, PBF, Arkansas, United States
Journal of the World Aquaculture Society (Impact Factor: 0.73). 12/2006; 37(4):464-473. DOI: 10.1111/j.1749-7345.2006.00059.x

ABSTRACT

Abstract In Tanzania, Nile tilapia culture is a promising aquaculture enterprise. Information on production costs could assist fish farmers in economic and financial planning. Economic profitability of small-scale Nile tilapia production in Tanzania is analyzed using a model that simulates individual fish growth and takes into account fish population dynamics in the pond. The results suggest that the current practiced mixed-sex tilapia culture without predation is not economically sustainable. Extension efforts should be geared toward developing a Nile tilapia production system that is based on a hand-sexed all-male tilapia. Meanwhile catfish can be introduced in ponds to control overcrowding in mixed-sex tilapia culture without predation. Studies to determine optimal pond sizes, availability of feed, and a quality fingerling supply chain are also fundamental for developing a sustainable Nile tilapia production system in Tanzania. Under improved Nile tilapia production systems, returns are high enough to justify investment through borrowed capital from formal institutions.

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    • "Feeding O. niloticus in semi-intensive ponds varies greatly in different countries depending on socio-economic status and knowledge of farmers (Yakubu et al. 2012). O. niloticus farmers in Tanzania commonly use simple mixture or single ingredient for feeding their fish (Kaliba et al. 2006) without any proven scientific guide. Thus, there is a need to provide viable and low-cost scientific based feeding information to O. niloticus farmers for improved production using resources available in their local settings. "
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    ABSTRACT: Unaffordability of commercial feeds to semi-intensive Nile tilapia, Oreochromis niloticus farmers has led to reliance on supplemental feeding and fertilization for nutrition of their fish without a scientific basis. This study compared the growth, survival, condition factor and yield performance of O. niloticus fed on mixed ingredients (MI) and rice bran alone (RB) diets reared in fertilized earthen ponds in small scale farmers’ ponds. The study also determined phytoplankton composition, biomass and abundance in the experimental ponds. Quadruplicate ponds were stocked with O. niloticus and African sharptooth catfish, Clarias gariepinus at a stocking ratio of 1:3. The initial mean weights of O. niloticus and C. gariepinus were 14.62 ± 0.61 and 20.34 ± 1.44 g respectively. The fish were fed on MI and RB diets with protein content of 184.74 and 126.06 g kg−1 respectively for 270 days. The results showed that growth performance, survival rate and condition factor of O. niloticus were not affected by either feeding with MI or RB diet (p > 0.05). Moreover, there were no significant differences obtained in phytoplankton biomass and abundance in O. niloticus ponds fed on the two diets (p > 0.05). Furthermore, feeding O. niloticus either on MI or RB diet did not affect the net and gross fish yields (p > 0.05). The study revealed that the use of either MI or RB diet does not significantly affect the performance of O. niloticus cultured in semi-intensive earthen ponds where natural food organisms are an integral part of the culture system. Rice bran could be used for semi-intensive culture of O. niloticus in fertilized ponds to boost the production based on its availability and low cost.
    Full-text · Article · Jan 2016 · SpringerPlus
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    • "Its production in developing countries occurs primarily in semi-intensive ponds with fertilization and/or supplementary feeding. In Tanzania, more than 95 % of fish farmers culture Nile tilapia in earthen ponds under mixed-sex culture (Kaliba et al. 2006). One of the main problems facing the culture of mixed-sex Nile tilapia in earthen ponds is early maturation leading to prolific breeding and production of high percentage of recruits (Offem et al. 2009; Chakraborty et al. 2011; Yakubu et al. 2012; Dagne et al. 2013). "
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    ABSTRACT: Prolific breeding and production of high percentage of recruits are main problems in mixed-sex Nile tilapia (Oreochromis niloticus) culture in earthen ponds. The current study assessed the efficiency of different sizes of African sharptooth catfish (Clarias gariepinus) in controlling recruitment in mixed-sex Nile tilapia cultured in tanks and its effect on growth performance, percentage survival and yield. Three treatments consisting of triplicate ponds stocked with mixed-sex Nile tilapia in monoculture and in polyculture with large (62.50 ± 3.26 g) and small (40.00 ± 2.68 g) African sharptooth catfish were fed on a 297.50 g kg-1 crude protein diet for 126 days. Results showed that, the number of recruits was significantly lower in larger African sharptooth catfish predator than smaller ones and monoculture of Nile tilapia. Polyculture with larger African sharptooth catfish resulted in significantly higher growth performance of Nile tilapia. Large African sharptooth catfish in polyculture reduced the amount of small, low-value recruits, while the yield of large and high value Nile tilapia was increased. This study revealed that fish farmers can reduce prolific breeding, obtain higher growth performance and produce larger size of marketable Nile tilapia by predominantly stocking ponds with large African sharptooth catfish predator of at least 60 g.
    Full-text · Article · Jan 2015 · International Aquatic Research
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    • "This paper aims at enhancing the utilization of aquaculture productivity, through value addition and market innovations of products for tilapia (Oreochromis niloticus) and African catfish (Clarias gariepinus). The species were chosen because of their inherited characteristics of environmental tolerance, and superior growth (Bardach et al., 1972; Kaliba et al., 2006). In Lake Victoria region, tilapia is the most preferred fish species by most fish consumers (Abila, 2003; SEDAWOG, 1999). "
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    ABSTRACT: This paper articulates the empirical evidence on consumer taste preference and purchase intent of value added products of farmed tilapia (Oreochromis niloticus) and African catfish (Clarias gariepinus). To meet the study objective, 150 fish consumers in Nyamagana district, Mwanza tasted various fish products including fishballs, samosa, pie and hot-smoked fish. A 3- point Likert scale was used to rank the taste and purchase intent for each product. Percentages and frequency distribution were calculated for descriptive analysis. Kruskal–Wallis test was performed for statistical analysis to find out the significant differences between consumer preference to the taste and willingness to purchase the fish products. Subsequently, Mann-Whitney U test was performed for post hoc tests. Results indicate that, the consumers’ taste preference between African catfish products were significantly different (H (3) = 11.40, p < 0.05) but there was no significant difference on the tilapia products (H (3) = 7.04, p > 0.05). Furthermore, no significant difference was observed on the purchase intent of all products for the two species (H (3) = 4.090, p > 0.05 for tilapia products, and H (3) = 2.953, p > 0.05 for African catfish products). Generally, the consumers accepted the taste of all products, despite the differences exhibited for the African catfish products. Training and promotion of value addition for farmed fish is therefore recommended to improve fish consumption as well as enhancing market performance for the aquaculture industry. Key words: Value addition; farmed fish; taste; purchase intent; Lake Victoria region
    Full-text · Article · Jan 2015
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