Influence of feeding level on growth rate of Tilapia aureus (Steindachner) reared in a closed circulated system

Papoutsoglou, Sofronios E.; Voutsinos, G. A.

doi:10.1111/j.1365-2109.1988.tb00432.x

Cited by 13 publications

(20 citation statements)

References 14 publications

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“…The optimal daily feeding rates of 2% or 3% for larger silver perch (50^500 g) at temperatures over 20 1C are similar to those reported for many other cultured species (De Silva et al1986;Merola & de Souza 1988;Papoutsoglou & Voutsinos 1988;Hung et al 1989;Lovell 1989a, b;Jodun 2004). Feeding rates are temperature dependent, and optimal rates for silver perch below 20 1C were 0.5% and 1% (Table 4).…”

Section: Feeding Rates and Frequenciessupporting

confidence: 81%

“…An asymptotic relationship between ration size and growth has been reported in many other species (Brett, Shelbourne & Shoop 1969;Papoutsoglou & Voutsinos 1988;Hung, Lutes, Conte & Storebakken 1989;Qin & Fast 1996;Adebayo, Balogun & Fagbenro 2000). An asymptotic relationship between ration size and growth has been reported in many other species (Brett, Shelbourne & Shoop 1969;Papoutsoglou & Voutsinos 1988;Hung, Lutes, Conte & Storebakken 1989;Qin & Fast 1996;Adebayo, Balogun & Fagbenro 2000).…”

Section: Feeding Rates and Frequenciesmentioning

confidence: 67%

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Development of a feeding strategy for silver perch, Bidyanus bidyanus (Mitchell), based on restricted rations

et al. 2005

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To develop a feeding strategy for the Australian freshwater ¢sh silver perch (Bidyanus bidyanus Mitchell), a series of eight experiments was done in 1m 3 cages in an aerated, earthen pond to determine the e¡ects of feeding rate (% body weight) and feeding frequency (no. of feeds day À1 ) on the growth and feed conversion ratio (FCR) of ¢ngerlings and larger ¢sh under ambient water temperatures over the range 13.83 0.6 1C. Fish were fed extruded pellets of a silver perch diet containing 34% digestible protein and 14 MJ kg À1 digestible energy. Commercial silver perch farmers were consulted about feeding practices for large ¢sh (4500 g) and at water temperatures below 12 1C, and winter feeding practices for other warmwater species were used to complete the strategy. In the feeding experiments, growth and FCR increased with increasing feeding rates to a level above which only FCR increased. Optimal feeding rates and frequencies were those which resulted in maximal growth, while minimizing e¡ort (feeding frequency) and FCR. The highest feeding frequency required for maximal growth, including that of small ¢ngerlings was twice (2 Â ) daily, and the optimal feeding rates varied with water temperature and size of ¢sh. The optimal daily regimes were: small ¢ngerlings (initial mean weight, 2.0 g) 7.5% 2 Â at a mean temperature of 23.3 1C; ¢ngerlings (14.9^27.7 g) 7.5% 2 Â at 27.1 1C, 5.0% 2 Â at 23.7 1C and 2.0% 1 Â at 16.8 1C; and large silver perch (162.5^510.6 g) 0.5% 1 Â daily or 1.0% on alternate days at 15.6 1C, 1.0% 1 Â at 17.3 1C, 3.0% 2 Â at 24.1 1C and 2.0% 2 Â at 27.9 1C. It is suggested that regimes of 0.5% 1 Â daily for ¢ngerlings (o50 g) and 0.5% 1 Â on alternate days for larger ¢sh are used at temperatures of 9^12 1C, and 0.5% 3 days week À1 and 0.5% 1 dayweek À1 for ¢ngerlings and larger ¢sh, respectively, at 6^9 1C. Feed inputs should not exceed 150 kg ha À1 day À1 in ponds less than 0.3 ha and 100 kg ha À1 day À1 in larger ponds. Our research has established a feeding strategy for silver perch based on restricted rations. Ã Overall mean; there were no signi¢cant di¡erences between means at stocking within each experiment.wRange of mean weights across all treatments and replicates. Aquaculture Research, 2005, 36, 1429^1441 Silver perch feeding strategy S J Rowland et al.

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Section: Feeding Rates and Frequenciessupporting

confidence: 81%

Section: Feeding Rates and Frequenciesmentioning

confidence: 67%

Development of a feeding strategy for silver perch, Bidyanus bidyanus (Mitchell), based on restricted rations

et al. 2005

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“…) in blood and liver, indicating a reduction 512 in feed utilization (Papoutsoglou & Voutsinos, 1988;Shimeno et al, 1997). Thus, the blood chemistry and tissues biochemical composition could be used as indexes to explain possible differences in overall results culturing aquatic species together at different densities.…”

Section: Introductionmentioning

confidence: 99%

Effects of stocking densities in blood chemistry and biochemical body composition of Nile tilapia Oreochromis niloticus and the prawn Macrobrachium americanum in polyculture

Santamaría‐Miranda¹,

Rojo-Cebreros²,

Sainz‐Hernández³

et al. 2018

LAJAR

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ABSTRACT. An assay on tilapia Oreochromis niloticus and freshwater prawn Macrobrachium americanum in polyculture was conducted during 112 days to study the effect on their blood chemistry and biochemical body composition to determine the feasibility of this polyculture in high density. Six densities were evaluated [T4/5, T9/5, T14/5, T0/5, T9/0, and T14/0; Ttilapia/prawn (ind m -2 )]. In tilapia were evaluated hemoglobin, red cells albumin, globulin, cholesterol, glucose, and triglycerides composition in blood. In M. americanum were evaluated hemocyanin, cholesterol, triglycerides, glucose and total protein in hemolymph. The total content of proteins, lipids, and carbohydrates in muscle and liver of tilapia, and muscle and hepatopancreas on prawns were also studied. Both animals presented significant differences (P < 0.05) in the glucose concentration, tilapia at T9/5 density presented significantly lower concentration (26.25 ± 6.3 mg dL -1 ) in blood, and prawn at T4/5 presented significant higher concentration (12.2 ± 1.9 mg dL -1 ). Tilapia monocultures T14/0 displayed significant higher (P < 0.05) carbohydrate concentration in muscle. No significant differences (P > 0.05) appeared in the concentration of lipids and proteins in any tilapia group and proximal composition of muscle and hepatopancreas in prawn. The present study indicates that polyculture in a density T14/5 is similar than monoculture with no effect in blood or hemolymph chemistry and proximal composition of tilapia and prawn. The blood glucose concentration can be considered an indicator of physiological changes for tilapia and prawn when cultured together.

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“…Ellis et al (2002) reviewed more than 40 studies concerning density effects on fish health in rainbow trout, most of them associated fish performance degradation at high density due to fish stress, aggressive interactions and the development of feeding hierarchies (Wallace et al 1988;Baker and Aylers 1990;Pickering 1992;Alanärä and Brännäs 1996). Conversely, other studies reported that very low densities could impact feed intake because of the establishment of hierarchical feeding behaviour (Papoutsoglou et al 1987(Papoutsoglou et al , 1990Pickering et al 1989;Zoccarato et al 1994). Most studies on the density effects on fish welfare do not generally distinguish between specific effects related to biomass increase per se and those caused by the degradation of water quality (Person-Le-Ruyet et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Effects of rearing density on sea bass (Dicentrarchus labrax) biological performance, blood parameters and disease resistance in a flow through system

D’Orbcastel

Lemarié

Breuil

et al. 2009

Aquat. Living Resour.

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-During 84 days, the effects of density on juvenile sea bass (Dicentrarchus labrax) (76 ± 16 g) were studied in an experimental tank-based flow through system. Performance, stress response and resistance to virus infection were analysed under five stabilized rearing densities: 10, 20, 40, 70 and 100 kg m −3 . Water quality parameters (CO 2 , total ammonia nitrogen and O 2 ) were measured and maintained close to the recommended values for farmed sea bass by adjusting water renewal exchange. No significant differences were observed between density treatments, neither on stress response (cortisol) nor susceptibility to nodavirus. With regards to biological performances, the daily feed intake and specific growth rate were significantly lower in fish reared at the 100 kg m −3 density. Results on the effects of density in sea bass reared in flow through (present study) and in recirculating aquaculture systems (RAS) (Sammouth et al. 2009) were compared as a contribution to the identification of density not affecting health and welfare in farmed sea bass. Key words:Rearing density / Flow through system / Stress / Water quality / Sea bass Résumé -Les effets de la densité en élevage sur les performances et le bien-être de bars (Dicentrarchus labrax) (76 ± 16 g) sont étudiés dans un système expérimental en circuit ouvert durant 84 jours. Les performances biologiques, la réponse au stress et la résistance à une infection virale sont étudiées sur des lots de poissons élevés à 5 densités différentes d'élevage stabilisées : 10, 20, 40, 70 et 100 kg m −3 . La qualité de l'eau est maintenue équivalente dans tous les bassins et au long de l'expérimentation en ajustant les taux de renouvellement en eau neuve. En particulier, les concentrations en O 2 , CO 2 , et azote ammoniacal total sont stabilisées autour des niveaux recommandés pour le bar d'élevage. Aucune différence significative n'est observée entre les différents traitements, sur la réponse au stress (cortisol) et sur la sensibilité au nodavirus (tests infectieux). La prise alimentaire quotidienne et le taux de croissance spécifique sont significativement inférieurs dans les lots maintenus à 100 kg m −3 . Ces résultats sont comparés à ceux obtenus au cours d'expériences similaires en circuit fermé (Sammouth et al. 2009). Il ressort que, dans la gamme testée, la densité n'apparaît pas comme un facteur limitant pour la santé (résistance à des infections virales) et bien-être (niveau de cortisol) du bar, pourvu que des conditions de bonne qualité de l'eau soient maintenues.

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Influence of feeding level on growth rate of Tilapia aureus (Steindachner) reared in a closed circulated system

Cited by 13 publications

References 14 publications

Development of a feeding strategy for silver perch, Bidyanus bidyanus (Mitchell), based on restricted rations

Development of a feeding strategy for silver perch, Bidyanus bidyanus (Mitchell), based on restricted rations

Effects of stocking densities in blood chemistry and biochemical body composition of Nile tilapia Oreochromis niloticus and the prawn Macrobrachium americanum in polyculture

Effects of rearing density on sea bass (Dicentrarchus labrax) biological performance, blood parameters and disease resistance in a flow through system

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