Hydrodynamics of Atlantic salmon culture tank: Effect of inlet nozzle angle on the velocity field

Gorle, J.M.R.; Terjesen, Bendik Fyhn; Summerfelt, Steven T.

doi:10.1016/j.compag.2019.01.046

Cited by 33 publications

(14 citation statements)

References 56 publications

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“…Water velocity is a critical factor in RAS, given that the optimum velocity for the fish is a compromise between muscle growth and fish welfare, so as to maximize benefits to humans. Therefore, as an advanced recirculating aquaculture system, it is still being enhanced with tank dynamics in controlling water velocity (Gorle et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Swimming exercise as potential measure to improve flesh quality of cultivable fish: A review

2021

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Swimming performance is viewed as a vital characteristic determining survival in many fish in the natural environment. However, a growing number of studies show that swimming exercise of cultivable fish has been associated with improved flesh quality, to which consumers are paying increasing attention. It includes a variety of aspects with both biological and edible layers. In the current situation, aquaculture in flowing water as an effective and feasible alternative for flesh quality improvement has a promising prospect. The goal of this review is to highlight key studies that have contributed to the influence of swimming exercise on fish growth performance, fibretype composition, nutritional value and muscular sensory properties, and tries to reveal the underlying mechanisms of flesh quality improvements. In addition, the issues that need to be highly valued in the application of flowing water to aquatic production practices are pointed out.

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Section: Introductionmentioning

confidence: 99%

Swimming exercise as potential measure to improve flesh quality of cultivable fish: A review

2021

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“…In general, fluctuation in environment affects the growth of rearing objects (Chai et al, 2006), and water flow velocity is an important environmental factor. In aquaculture, the water flow velocity plays a vital role in removing excrement, circulating dissolved oxygen and maintaining water quality (Gorle et al, 2018(Gorle et al, , 2019(Gorle et al, , 2020Labatut & Olivares, 2004;Oca & Masalo, 2013). The rearing objects also would adjust their spatial distribution and swimming posture facing a complex environment in flow velocity, considering their own requirements (Hockley et al, 2013;Stelle et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Effects of flow velocity on growth and physiology of juvenile largemouth bass ( Micropterus salmoides ) in recirculating aquaculture systems

Chen

et al. 2021

Aquaculture Research

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The cultivation of largemouth bass (Micropterus salmoides) in recirculating aquaculture systems (RAS) has become a growing trend. To ensure the welfare of juvenile largemouth bass in RAS, the effects of different flow velocities on their growth and physiology were explored, considering the flow velocity in real production. Following the stable water quality, juvenile largemouth bass with a body mass of 1.92 ± 0.38 g and body length of 4.50 ± 0.36 cm were reared at three different flow velocities of high flow (HF, 18 cm/s, 4.00 bl/s), middle flow (11 cm/s, 2.45 bl/s, actual average flow velocity of aquaculture) and low flow (4 cm/s, 0.90 bl/s) respectively. The whole experiment lasted 66 days. Results showed that different flow velocities had significant effects on the growth, digestive enzyme activities, antioxidant capabilities and immune capabilities of juvenile largemouth bass. HF can significantly increase the cumulative food intake, hepatosomatic index, weight gain rate, specific growth rate and condition factor of largemouth bass juveniles (p < 0.05). Flow velocity had no significant effect on feed conversion rate (p > 0.05), but the mean of feed conversion rate in HF group was the lowest. Under the HF condition, the activities of trypsin and amylase increased significantly (p < 0.05). For lipase activity, although no significant differences were observed between groups (p > 0.05), the mean of lipase activity increased as the flow velocity increased. With regard to the antioxidant and immune capacity, the malondialdehyde content in HF group significantly decreased (p < 0.05), and the immunoglobulin M content significantly increased (p < 0.05). From the above, following the HF velocity condition, fish growth, oxidative defence, immune capacity and digestive capacity could be improved to a large extent. To achieve higher growth, it is recommended circulating flow velocity of no less than 18 cm/s in largemouth bass at the juvenile stage (approximately 1.9-37.5 g and 4.5-14.5 cm long).

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“…Outros estudos também relatam os efeitos da geometria do tanque, fluxo, entrada e saída de água na hidrodinâmica em sistemas de recirculação (OCA & MASALÓ 2007, OCA & MASALÓ 2013, GORLE et al 2018a, GORLE et al 2019. No entanto, eles verificam a condição da água em função da engenharia do projeto, sem avaliar o efeito direto nos animais.…”

Section: Introductionunclassified

Produção de pós-larvas de tilápia do Nilo em sistema de recirculação de água com tanques retangulares e diferentes designs de entrada de água

Souza¹,

Silva²,

Leal³

et al. 2021

Rev. Ciênc. Agrovet.

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O objetivo do presente estudo foi avaliar o efeito de diferentes formas de entrada de água em tanques retangulares na produção de pós-larvas de tilápia do Nilo em sistema de recirculação. 720 animais com peso de 0,02 g e comprimento de 12.52 mm foram distribuídos em 12 tanques retangulares, com relação de comprimento/largura de 1,20 e vazão de entrada de água de 3,2 vezes o volume útil dos tanques. Os tratamentos consistiram em três designs de entrada de água: superior, única vertical submersa e dupla vertical submersa, com quatro repetições cada. Foram avaliados o desempenho produtivo (peso e comprimento final, taxa de crescimento específico, fator de condição e sobrevivência) e a qualidade de água (pH, oxigênio dissolvido, temperatura, sólidos dissolvidos e condutividade elétrica). O oxigênio dissolvido foi avaliado nas quatro extremidades e ao centro de cada tanque para verificar a existência de zonas mortas. Além disso, foi verificado a concentração de sólidos suspensos, 30 minutos após o arraçoamento aos 21 dias de estudo. O design de entrada de água não influenciou no desempenho produtivo e nos parâmetros gerais de qualidade de água (p>0,05). Não houve diferença na concentração de oxigênio dissolvido dentro do tanque do mesmo tratamento, indicando que não houve formação de zonas mortas (p>0,05). Houve diferença na concentração de oxigênio dissolvido nas extremidades e no centro dos tanques, devido aos tratamentos, onde os menores valores foram verificados para os tanques com entrada de água única vertical submersa (p<0,05). Os tanques com dupla entrada vertical submersa apresentaram menor concentração de sólidos suspensos, em comparação aos demais tratamentos (p<0,05). Dessa forma, não é indicado a utilização de entrada única vertical submersa e como não houve influência negativa no desempenho produtivo e qualidade de água, é possível produzir pós-larvas de tilápia do Nilo com entrada de água superior.

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Hydrodynamics of Atlantic salmon culture tank: Effect of inlet nozzle angle on the velocity field

Cited by 33 publications

References 56 publications

Swimming exercise as potential measure to improve flesh quality of cultivable fish: A review

Swimming exercise as potential measure to improve flesh quality of cultivable fish: A review

Effects of flow velocity on growth and physiology of juvenile largemouth bass ( Micropterus salmoides ) in recirculating aquaculture systems

Produção de pós-larvas de tilápia do Nilo em sistema de recirculação de água com tanques retangulares e diferentes designs de entrada de água

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