Is growth retardation present in Nile tilapia Oreochromis niloticus cultured in low water exchange recirculating aquaculture systems?

Martins, Catarina I.M.; Ochola, Daniel; Ende, S.S.W.; Eding, E.H.; Verreth, J.A.J.

doi:10.1016/j.aquaculture.2009.09.030

Cited by 73 publications

(45 citation statements)

References 19 publications

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“…In contrast, water-borne chemicals decrease levels of aggression in pairs of Nile tilapia, possibly because they allow recognition of familiar individuals; fish held in pairs fight more when a continuous flow of water removes such cues, (Giaquinto & Volpato 1997), mainly due to increased aggressiveness in the subordinate fish (Gonçalves de Freitas et al 2008). So, recirculation might decreases the problem of aggression, but large Nile tilapia can show growth retardation in recirculation systems, which allow waterborne substances to accumulate (Martins et al 2009). …”

Section: Manipulating Stimuli Experienced By Cultured Fishmentioning

confidence: 99%

Fighting and Aggression

Damsgård¹,

Huntingford²

2012

Aquaculture and Behavior

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Aggression (behaviour that actually or potentially causes harm to another animal) is widespread among fishes, often taking the form of territoriality or dominance. The mechanisms that control aggression in fish are described, including the effects of stimuli from opponents, the importance of the context in which an aggressive encounter occurs and the effects of nutritional condition, endocrine status and brain biochemistry. The way aggression changes during development is then considered, evidence given for inherited differences in aggressiveness and an account presented of the environmental factors that influence the way aggression develops. The benefits that fish gain from winning fights, the costs that they incur from fighting and how they balance costs against benefits to promote their individual fitness are described. Data are then given on the incidence of aggression among cultured fish, on some resulting problems for production, welfare and environmental protection and on the effects of domestication and captive rearing of aggressiveness. Possible solutions to such problems are discussed, based on selecting appropriate fish for culture and the design of husbandry systems that minimise aggression. Finally, some systems for mitigating the effects of domestication and captive rearing on the aggressive behaviour of cultured fish are described.

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Section: Manipulating Stimuli Experienced By Cultured Fishmentioning

confidence: 99%

Fighting and Aggression

Damsgård¹,

Huntingford²

2012

Aquaculture and Behavior

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“…However this procedure increases the water consumption. Martins et al (2009), report that juveniles (up to 150 g) can be raised in RAS at 3.8 kg m -3 with water exchange rates of 30 L kg -1 feed day -1 , without a decrease in feeding motivation. On the contrary, large fish (288.7 ± 34.2 g) stocking at 7.2 kg m -3 exhibit growth retardation.…”

Section: Effect Of Density On Fish Growth and Survivalmentioning

confidence: 99%

Performance of Nile tilapia Oreochromis niloticus fingerlings in a hyper intensive recirculating aquaculture system with low water exchange

Klanian¹,

Arámburu-Adame²

2013

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ABSTRACT. The aim of this paper was evaluate the performance of Nile tilapia fingerlings (Oreochromis niloticus) raised at hyper intensive stocking density in a recirculating aquaculture system (RAS) with minimum water replacing. The experimental system was performed in a single-batch nursery system to obtain 50 g fish size in 60 days. Fish (2.07 ± 0.04 g) were stocked in triplicate at 400 (T1), 500 (T2) and 600 (T3) ) was significantly higher than T3 (0.83 g day -1 ; 4.80% day -1 ). The specific growth rate (SGR) of T1 was 41% influenced by temperature. For T2 and T3 the SGR were influenced by the variation of dissolved oxygen (DO) that explained 47 and 44% of the fish weight variation, respectively. The SGR from T3 was also affected by the concentration of ammonia nitrogen (31%). The high stocking density affected the overall size of fish and the size homogeneity, but had no negative effect on the length-weight relationship (L-W). Data support the conclusion that fingerling stocked at 400 and 500 fish m -3 shows high performance during 9-weeks when the biomass not exceed 37 kg m -3 . At this time fish have reached the desired final nursery weight (50 g) for transfer to grow-out facilities. Keywords: Nile tilapia, recirculating aquaculture system, low water exchange, intensification. Rendimiento de juveniles de tilapia del NiloOreochromis niloticus en un sistema híperintensivo de recirculación acuícola con mínimo recambio de agua RESUMEN. El objetivo de este trabajo fue evaluar el rendimiento de juveniles de tilapia del Nilo Oreochromis niloticus sembrados en densidades hiperintensivas en un sistema de recirculación acuícola (SRA) con mínimo remplazo de agua. El sistema experimental consistió en un sistema de precría de cosecha única para obtener peces de 50 g en 60 días. Los peces (2,07 ± 0,14 g) se sembraron por triplicado a densidades de 400 (T1), 500 (T2) y 600 (T3) peces m -3 (0,84; 1,05; 1,22 kg m -3 ). El SRA funcionó con 12.000 L de agua recirculante y un remplazo diario de 252 L (2,1% por día). La densidad de siembra no afectó significativamente la supervivencia (89,5-93,6%). El biofiltro removió el amonio nitrogenado total con una eficiencia del 46,9 ± 7,0%. La tasa de crecimiento de T1 (0,96 g día -1 ; 5,01% día ; 4,80% día -1 ). La temperatura influyó 41% en la tasa de crecimiento específico (TCE) de T1. La concentración de oxígeno disuelto (DO) influyó en la variación de peso en T2 (47%) y T3 (44%). La TCE de T3 también se vio afectada por la concentración de nitrógeno amoniacal (31%). El aumento de la densidad de siembra afectó el tamaño y la homogeneidad de tallas de los peces, pero no afectó la relación longitud-peso (L-P). Los datos respaldan la conclusión que los juveniles sembrados a densidades de 400 y 500 peces m -3 tienen alto rendimiento durante nueve semanas consecutivas, siempre y cuando la biomasa no se exceda de 37 kg m -3 . En este tiempo los peces alcanzan el peso final esperado de precría (50 g) y pueden ser transferidos hacia las instalaciones de engorde. Palabras clave: tilapia ...

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“…The speed with which fish resume feeding after a stressor has been used as a foraging-related welfare indicator, for example in rainbow trout (Øverli et al 2006a). Feeding motivation, measured as the latency to start feeding, has also been used as an indicator of welfare in Nile tilapia Oreochromis niloticus, cultured in recirculating aquaculture systems (Martins et al 2009). More recently, Rubio et al (2010) used self-feeders in sea bass, Dicentrarchus labrax, to understand the effects on refeeding dynamics after fish are exposed to fasting periods (which may occur before harvest).…”

Section: Foraging Behaviourmentioning

confidence: 99%

Behavioural indicators of welfare in farmed fish

Martins¹,

Galhardo²,

Noble³

et al. 2011

Current Views on Fish Welfare

120

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Behaviour represents a reaction to the environment as fish perceive it and is therefore a key element of fish welfare. This review summarises the main findings on how behavioural changes have been used to assess welfare in farmed fish, using both functional and feeling-based approaches. Changes in foraging behaviour, ventilatory activity, aggression, individual and group swimming behaviour, stereotypic and abnormal behaviour have been linked with acute and chronic stressors in aquaculture and can therefore be regarded as likely indicators of poor welfare. On the contrary, measurements of exploratory behaviour, feed anticipatory activity and rewardrelated operant behaviour are beginning to be considered as indicators of positive emotions and welfare in

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Is growth retardation present in Nile tilapia Oreochromis niloticus cultured in low water exchange recirculating aquaculture systems?

Cited by 73 publications

References 19 publications

Fighting and Aggression

Fighting and Aggression

Performance of Nile tilapia Oreochromis niloticus fingerlings in a hyper intensive recirculating aquaculture system with low water exchange

Behavioural indicators of welfare in farmed fish

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