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

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

“…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).…”

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

“…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).…”

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

“…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).…”

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

“…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.…”

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

“…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).…”

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

“…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).…”

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

“…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.…”

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

“…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).…”

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

“…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).…”

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

“…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.…”