Development of Brood-stock Diets for Nile tilapia Under Hapa-in-Pond Hatchery System; Optimal Dietary Vitamin C Level for the Optimum Reproductive Performance and Fry Survival

Suloma, Ashraf; Tahoun, Al Azab M; Mabrok, Rania S

doi:10.4172/2155-9546.s2-010

Cited by 7 publications

(3 citation statements)

References 13 publications

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“…The weight of the broodstock recorded at each larval harvest in each system allowed us to calculate the average daily gain (ADG) of males and females according to the formula ADG (g·day −1 ) = (final average weight − initial average weight)/duration (days). The absolute productivity (AP) and relative productivity (RP) were calculated according to Dhraïef et al (2010) and Suloma et al (2017), respectively, using the formulas AP = number of larvae harvested/number of females and RP = number of larvae harvested/(average weight of females × number of females). The productivity of each breeding system was determined using the formula Ps = number of larvae harvested/(breeding duration × system area exploited) according to Abou‐Zied and Ali (2012).…”

Section: Methodsmentioning

confidence: 99%

Comparative study of larvae production by the Nile tilapia ( Oreochromis niloticus , Linné, 1758) Bouaké strain between earthen ponds and hapas

Akian

Quenum

Koua

et al. 2022

Aquaculture Research

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The aim of this study was to contribute to the development of tilapia aquaculture in Côte d’Ivoire by increasing the productivity of Oreochromis niloticus fry in fish hatcheries. Thus, the production of Oreochromis niloticus larvae was compared between two tilapia breeding systems, earthen ponds and hapas in ponds. Over 98 days, 900 broodstock fish were allowed to reproduce in two ponds of 500 m2 and 900 others in 20 hapas of 50 m2, each installed in two ponds of 1200 m2. The sex ratio was one male for two females at a density of 0.9 breeders/m2 at a density of 450 breeders per pond and 45 breeders per hapa. After breeding broodstock in both systems, larvae were harvested and counted every 14 days. The survival rate and growth of the broodstock, as well as the reproductive performance of the females, were evaluated. There was no significant difference between the survival rates of the broodstock in the two breeding systems (98.1 ± 0.4% in ponds and 97.4 ± 0.5% in hapas). Broodstock, however, showed significantly higher growth in ponds than in hapas. The quantity of larvae produced by females in ponds was significantly higher than that of females bred in hapas (p < 0.05). Hence, the best reproductive performance was recorded in broodstock stocked in ponds (absolute productivity: 93.1 larvae per female, relative productivity: 0.3 larvae per g of female, system productivity: 3.9 ± 0.2 larvae·m−2·day−1).

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Section: Methodsmentioning

confidence: 99%

Comparative study of larvae production by the Nile tilapia ( Oreochromis niloticus , Linné, 1758) Bouaké strain between earthen ponds and hapas

Akian

Quenum

Koua

et al. 2022

Aquaculture Research

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show abstract

“…Suitability to various culture techniques and its tolerance to numerous environmental and physico-chemical water quality parameters such as frequent fluctuation in pH and salinity, low dissolved oxygen, high concentrations of chemical nutrients, ability to reproduce in captivity and potential to accept natural and formulated feeds make the species most preferred and best cultured fish around the globe (Assefa & Getahun, 2015;Engdaw et al, 2013;Gule & Geremew, 2022;Suloma et al, 2017;Tesfahun & Temesgen, 2018;Tesfaye et al, 2020;Wagaw et al, 2022). Subsequently, commercial and ecological importance of Nile tilapia is undeniable especially in many top tilapia farming Asian and African countries where the demand for inexpensive protein diet is alarming exponentially (Ribeiro et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Morphometric relations and diet compositions of Nile tilapia Oreochromis niloticus (Linn. 1758) in Lake Tana Gorgora gulf, Ethiopia

Engdaw¹

2023

Fish Aquat Sci

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Oreochromis niloticus is the most ecologically and economically important fish in tropical and sub-tropical aquatic systems. Recently, due to sever anthropogenic stressors, hydrological variations and infestations of invasive alien species in Ethiopian water bodies, fish community structure and ecosystem of Lake Tana is changing alarmingly. So far, there is paucity of information on the morphometric relations and diet composition of O. niloticus in Lake Tana, gulf of Gorgora. A total of 309 fish samples were collected and their total length (TL), standard length (SL) and total weight (TW) were measured to determine morphometric relations; and gut contents were examined to identify most important food item in the diet of the fish. Results indicated that, the relation between TL and SL was significant (p < 0.001) and linear (SL = 0.942TL-2.41) while the relation between TL and TW was curvilinear (TW = 0.014 TL 2.8 ) indicating allometric growth. Among the total guts scrutinized, 53 (17.3%) of them were empty and the remaining 256 (82.7%) were non-empty. Phytoplankton constituted the largest bulk and occurred in 77% of the guts examined and volumetrically accounted 44.3%. Detritus and zooplankton had an intermediate importance by occurring 60.2% and 63.3% of all guts scrutinized and constituted about 25.6% and 15.5% of the total volume respectively. Contributions of macrophytes, insects, nematodes and unidentified food items were relatively low in their importance. Ontogenetic dietary shift was observed in the diet indicating an omnivorous feeding habit of the adult fish.

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“…Determination of brood density and appropriate size or weight was considered a positive tool for the management of Nile tilapia hatcheries because it may have consequences for reproductive efficiency (Salama and Essa, 1995;Ridha and Cruz,1999;Mashaii et al, 2016). Also, increased knowledge of the factors that regulate brood productivity are of great importance for the further development of tilapia culture especially the overall environmental approach, age or weight, storage density, sex ratio and nutrition (Tahoun et al,2008;Orlando et al,2017;Suloma et al,2017;Helal et.al 2017 ;Mashaii et.al.2019). These researchers have recommended further research to determine whether the weight, number or age of the brood should be the basis for maternal storage.…”

Section: Introductionmentioning

confidence: 99%

Improved technological innovation and management aspects in the Nile tilapia, Oreochromis niloticus, seed production

Helal¹,

Abdelaty²,

Elokaby³

et al. 2020

Egypt. J. of Aquatic Biolo. and Fish.

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Development of Brood-stock Diets for Nile tilapia Under Hapa-in-Pond Hatchery System; Optimal Dietary Vitamin C Level for the Optimum Reproductive Performance and Fry Survival

Cited by 7 publications

References 13 publications

Comparative study of larvae production by the Nile tilapia ( Oreochromis niloticus , Linné, 1758) Bouaké strain between earthen ponds and hapas

Comparative study of larvae production by the Nile tilapia ( Oreochromis niloticus , Linné, 1758) Bouaké strain between earthen ponds and hapas

Morphometric relations and diet compositions of Nile tilapia Oreochromis niloticus (Linn. 1758) in Lake Tana Gorgora gulf, Ethiopia

Improved technological innovation and management aspects in the Nile tilapia, Oreochromis niloticus, seed production

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