Practical feeds for juvenile Nile tilapia (Oreochromis niloticus) prepared by replacingRastrineobola argenteafishmeal with freshwater shrimp (Caridina nilotica) and mung bean (Vigna radiata) meals

Kubiriza, Godfrey Kawooya; Akol, Anne M.; Árnason, Jón; Sigurgeirsson, Ólafur; Snorrason, Sigurður S.; Tómasson, Tumi; Thorarensen, Helgi

doi:10.1111/anu.12537

Cited by 6 publications

(6 citation statements)

References 32 publications

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“…Agricultural by-products (i.e., soybean and full-fat soybean), plant leaves and weeds (i.e., taro leaves, cassava leaves, sweet potato leaves, and gallant soldier weed), aquatic plants (i.e., azolla and lettuce vegetable), and spent brewer's yeast were intermediate in lysine and methionine plus cysteine, but high in tryptophan (0.2-1.5%). This is consistent with findings reported from previous studies (Barroso et al 2014;Kubiriza et al 2018). According to El-Sayed (2004), the essential amino acid (EAA) requirement for tilapia species is in the range 1.43-1.62% for lysine, 0.17-0.6% for tryptophan, 0.53-1.13% for methionine and 0.53-2.1% for cysteine.…”

Section: Discussionsupporting

confidence: 92%

Fish farming in Tanzania: the availability and nutritive value of local feed ingredients

Mmanda

Mulokozi

Lindberg

et al. 2020

Journal of Applied Aquaculture

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An investigative field survey was performed to gather baseline data on locally available feed ingredients and fish farming practices in different regions of Tanzania. More than 80% of respondents relied on locally available feed ingredients as a major feed supplement for their cultured fish, with maize bran being the most commonly used feed ingredient in all regions. Crude protein content in most analyzed local feed ingredients was medium-high, while crude fat content was high in some animal and agricultural by-products, and medium-low in other ingredients. Most respondents were males and the majority of fish farms were owned by individuals. Earthen pond was the most common fish farming system in all regions except Dar es Salaam. Semi-intensively mixed-sex tilapia monoculture was the dominating fish farming practice. The results of the survey presented provide a good platform for future development of culture systems and feeding strategies for tilapia in Tanzania.

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Section: Discussionsupporting

confidence: 92%

Fish farming in Tanzania: the availability and nutritive value of local feed ingredients

Mmanda

Mulokozi

Lindberg

et al. 2020

Journal of Applied Aquaculture

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“…The AFCR of fish fed EF was 43% lower than that of fish fed PF. The FCR in both groups (1.6 and 2.8) was within the range of those observed in other studies on Nile tilapia in pond culture (1.4-4.4) (Elsayed 1998;Al-Hafedh 1999;Liti et al 2005Liti et al , 2006Kubiriza et al, 2017) and in tanks (1.2-2.03) (Liti et al 2006) and (1.19-2.03) (Mugo-Bundi et al 2015). Several factors could have contributed to this difference in AFCR including differences in the physical qualities of the feeds.…”

Section: Growth and Feed Intakesupporting

confidence: 88%

“…2015; Kubiriza et al 2017). The local artisanal feed manufactures do not have the facilities to monitor the composition of the raw materials and do not adjust for variation in quality.…”

Section: Growth and Feed Intakementioning

confidence: 99%

A comparative study of the effects of pelleted and extruded feed on growth, financial revenue and nutrient loading of Nile tilapia (Oreochromis niloticus L.) cage culture in a lacustrine environment

Musa

Aura

Tómasson

et al. 2021

Journal of Applied Aquaculture

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We compared the benefits of using extruded feed (EF), against pelleted feed (PF) to guide cage culture investments in Great Lakes. Three out of six cages in the same farm had fish that were fed EF and the other half, belonging to a different farm had fish that were fed PF. The diets were similar in crude protein, lipid and energy content. However, the fiber content in PF was 4 times higher than that of EF. The fish fed on EF grew better (438.0 ± 7.4 g) than the fish fed on PF (220.8 ± 2.9 g). The cost of production for EF was about 26% lower than for PF, primarily because of better feed utilization. The load of P and N for PF diet was 59% and 29% higher, respectively, than when EF was used.Therefore, EF feed delivered better economic gains with lower environmental impact than PF feed. KEYWORDS:Cage culture; Nile tilapia (Oreochromis niloticus); cost of production; market channels; pellet stability; nutrient load. have only one production cycle per year, since turnover in the lake, occurring between August and October, may cause heavy mortalities (KMFRI 2016). The preferred market size of Nile tilapia around the L. Victoria basin is >400 g, with sales prices per kilogram of fish varying between market sections (KMAP 2016).As is common practice in Africa, most of the cage fish production is bought by agents who transport the fish, chilled, to retailers in major cities (KMAP 2016; Awuor et al. 2019). Many farmers prefer this route to market because the agents pay cash immediately. A second sales channel is through wholesalers who resell the fish to retailers and/or directly to consumers at the local markets. Here, the wholesaler pays for the fish up to a week later. Finally, a small fraction of the production is bought directly by consumers at the landing site. The farmgate price for tilapia in sub-Saharan Africa is relatively low, due to the limited purchasing power of the local buyers and because of competition with cheaper frozen tilapia imported from China (Awuor et al. 2019). Since there is little direct contact between farmers and consumers the price is determined primarily by the intermediaries. As a result, profit margins of fish farms are narrow. Globally, aquaculture practices and studies have shown feed costs to represent half or more of production costs and are, therefore, an important factor in determining the economic outcome for fish farms (Watanabe 2002;

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“…Caridina nilotica is a bycatch of the silver cyprinid fishery in Lake Victoria. It is underutilized in Kenya where it is mainly incorporated in animal feed due to its high protein content ( Mugo-Bundi et al, 2015 ; Kubiriza et al, 2018 ). Moringa oleifera is highly nutritious and rich in vitamins, minerals, and essential amino acids; it has higher digestibility and improves feed efficiency in animals ( Moyo et al, 2016 ; Abbas et al, 2018 ; El-hack et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Innovative feedstocks for optimal mass production of the edible long-horned grasshopper, Ruspolia differens

Kababu

Collins²,

Subramanian³

et al. 2022

Front. Physiol.

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The edible long-horned grasshopper Ruspolia differens Serville (Orthoptera:Tettigoniidae) is a highly nutritious food source consumed in over 20 African countries. Its occurrence is highly seasonal, and wild harvesting is carried out using locally designed and inefficient light traps, thus limiting sustainable utilization as an important food source. To ensure year-round production and availability of R. differens, we evaluated the effects of low-cost and affordable diets based on agricultural by-products on their growth performance, survival, fecundity, and longevity. A total of four diets with varying ratios of agricultural by-products were evaluated: Diet 1 [33.3% maize bran (MB) + 33.3% wheat bran (WB) + 33.3% Moringa oleifera leaf powder (MOLP)], Diet 2 [25% MB + 25% WB + 25% MOLP + 25% shrimp powder (SP)], Diet 3 [20% MB + 20% WB + 20% MOLP + 20% SP + 20% soya bean meal], and Diet 4 (“control”—routinely used diet). The grasshoppers were subjected to the diets from the 1st nymphal instar (24-h-old stages) through adult stages until death. Diet 3 had the highest crude protein content (28%) and digestibility (74.7%). R. differens fed Diet 3 had the shortest development time (57 days) [p < 0.001], highest survival (87%) [p < 0.001], and maximum longevity (89 days) [p = 0.015] and fecundity (247 eggs/female) [p = 0.549] across the various diets. Female survival rate (59%) on Diet 3 was significantly higher compared to the males (41%). The adult female weight gain was significantly higher compared to males fed on different diets. Percentage hatchability of eggs was not significantly different when females were fed Diet 3 and Diet 2. There was a significantly positive correlation between longevity and fecundity of R. differens reared on Diet 2 and 3. These diets could be further optimized and fine-tuned for improved cost-effective mass production of R. differens continent-wide to reduce dependence on erratic and poor seasonal harvest during swarms.

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Practical feeds for juvenile Nile tilapia (Oreochromis niloticus) prepared by replacingRastrineobola argenteafishmeal with freshwater shrimp (Caridina nilotica) and mung bean (Vigna radiata) meals

Cited by 6 publications

References 32 publications

Fish farming in Tanzania: the availability and nutritive value of local feed ingredients

Fish farming in Tanzania: the availability and nutritive value of local feed ingredients

A comparative study of the effects of pelleted and extruded feed on growth, financial revenue and nutrient loading of Nile tilapia (Oreochromis niloticus L.) cage culture in a lacustrine environment

Innovative feedstocks for optimal mass production of the edible long-horned grasshopper, Ruspolia differens

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