Developments in recirculating systems for Arctic char culture in North America

Summerfelt, Steven T.; Wilton, Gary; Roberts, David; Rimmer, Tina; Fonkalsrud, Kari

doi:10.1016/j.aquaeng.2003.09.001

Cited by 74 publications

(37 citation statements)

References 15 publications

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“…All types of biofilters described in literature (Losordo et al, 1999) go through a process of maturation to form a colony of nitrifying bacteria that remove and transform ammonia in nitrites and then in nitrates. The biofilter used in the RAS described in the present study went through a maturation period of weeks, working efficiently afterwards and keeping the levels of ammonia in 0.004 mg L -1 on average, similarly to the levels obtained by Timmoms et al (2002), Ingle de la Mora et al (2003) and Summerfelt et al (2004) and recommended for similar species such as Scophthalmus maximus L. (Poxton et al, 1982), Solea senegalensis (Dinis et al, 1999), Paralichthys lethostigma (Smith et al, 1999), P. dentatus (Katersky et al, 2006). Sexual dimorphism between females and males is very clear for some fish species with differences in body shape, coloration, caudal fin shape, number of genital openings, etc.…”

Section: Discussionsupporting

confidence: 61%

Broodstock management of the fine flounder Paralichthys adspersus (Steindachner, 1867) using recirculating aquaculture systems

Carrera

Cota

Montes

et al. 2013

lajar

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ABSTRACT. The present study describes the methodology used at IMARPE for the capture, acclimation and management of P. adspersus broodstock using recirculating aquaculture systems (RAS). RAS improved the water quality and maintained the environmental parameters during the acclimation period, temperature (17.2±1ºC), oxygen (8.1±0.7 mg L -1 ), pH (7.3±0.2), ammonia (0.004±0.003 mg L -1 ), nitrite (0.52±0.2 mg L -1 ) and nitrate (3.45±2.6 mg L -1 ). Fish began to be fed normally from day 15 post-capture, once or twice a day using live fish (Odonthestes regia regia, Mugil cephalus), crustacean (Emerita analoga), fresh food (Engraulis ringens and Dosidicus gigas) and artificial feed. A significant loss in the weight of the fish was registered during the first days of captivity, followed by a continuous increase in both sexes. The specific growth rate was positive from the third month of captivity, being the relative growth rate 24.5% and 16.2% in August 2010 in males and females, respectively. Different internal and external parasites were detected in the fish, being Entobdella sp. and Philometra sp. the prevailing parasites observed during samplings. Keywords: Paralichthys adspersus, reproduction, recirculating aquaculture system, broodstock management, culture, Peru. Manejo de reproductores del lenguado Paralichthys adspersus (Steindachner, 1867)usando sistemas de recirculación en acuicultura RESUMEN. El presente trabajo, describe la metodología desarrollada en IMARPE para la captura, aclimatación y acondicionamiento de ejemplares adultos de P. adspersus en sistemas de recirculación (SRA), con la finalidad de formar un stock de reproductores. El SRA permitió manejar parámetros medioambientales estables durante el periodo de acondicionamiento, como: temperatura del agua (17,2±1ºC), oxígeno disuelto (8,1±0,7 mg L -1 ), pH (7,3±0,2), amonio (0,004±0,003 mg L -1 ), nitrito (0,52±0,2 mg L -1 ) y nitrato (3,45±2,6 mg L -1 ). Se dio inicio a la alimentación el día 15 post-captura, utilizando alimento vivo (Odonthestes regia regia, Mugil cephalus), crustáceos (Emerita analoga), alimento fresco (Engraulis ringens y Dosidicus gigas) y artificial semihúmedo. Durante los primeros días de acondicionamiento los peces mostraron una disminución en el peso, hasta su adaptación a las condiciones de cultivo, luego de lo cual se produjo un incremento continuo en ambos sexos. La tasa específica de crecimiento fue positiva a partir del tercer mes y la tasa de crecimiento relativo mostró que en agosto 2010, el peso promedio se incrementó 24,5% en machos y 16,2% en hembras. Se realizó un análisis patológico a los ejemplares capturados y se observó la presencia de diferentes parásitos internos y externos, entre ellos predominaron Entobdella sp. y Philometra sp. Latin American Journal of Aquatic ResearchPalabras clave: Paralichthys adspersus, reproducción, sistema de recirculación en acuicultura, manejo de reproductores, cultivo, Perú.

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Section: Discussionsupporting

confidence: 61%

Broodstock management of the fine flounder Paralichthys adspersus (Steindachner, 1867) using recirculating aquaculture systems

Carrera

Cota

Montes

et al. 2013

lajar

View full text Add to dashboard Cite

show abstract

“…A c c e p t e d M a n u s c r i p t 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 16 should be high enough to exchange the culture tank volume once every 30-45 min, thereby maintaining safe dissolved oxygen concentrations at high fish densities (Johannsson et al, 2010;Summerfelt et al, 2004). The low rearing temperature of Arctic char can be a challenge in RAS as the degree of recirculation increases, and may require installation of water chillers or increased use of make-up water to maintain the temperature within the optimal range .…”

Section: Existing Ras Setupsmentioning

confidence: 99%

Farming different species in RAS in Nordic countries: Current status and future perspectives

Dalsgaard

Lund

Thorarinsdottir³

et al. 2013

Aquacultural Engineering

302

131

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“…The most used tanks are circular [7,8]. Water is supplied in these tanks by means of diffusers at the walls.…”

Section: Introductionmentioning

confidence: 99%

A model for the settling velocity of flocs; application to an aquaculture recirculation tank

García-Aragón¹,

Salinas-Tapia²,

Moreno-Guevara³

et al. 2014

Int. J. CMEM

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A general model for fl ocs settling velocity is still an open fi eld of research in the scientifi c literature. In this work, a reduced model of an aquaculture recirculation tank was used to validate a model for fl oc settling velocity. Cohesive sediments from non-used food and fi sh excreta are a main concern in those tanks design. Excess concentrations of sediments can cause fi sh death or additional costs of energy for aeration. This research is aimed to understand the settling behavior of fl ocs when subjected to a liquid shear rate. A reduced scale model of an aquaculture recirculation tank was build in Plexiglas in order to use particle image velocimetry and particle tracking velocimetry techniques to measure fl uid velocities, solid settling velocities, fl ocs shape and size.Different fl ow rates and solid concentrations were used to develop varied confi gurations in the system; models for fl oc settling velocity based on fractal theory were calibrated. Cohesive sediments from fi sh food were observed in long-term experiments at constant fl uid shear rate in the recirculation tank. A group of 50 images were obtained for every 5 min. Image analysis provided us with fl oc settling velocity data and fl oc size. Using fl oc settling velocity data, fl oc density was obtained for different diameters at equilibrium conditions, after 1 h or larger experiments. Statistical analysis of fl oc velocities for different fl oc sizes allowed us to obtain an expression for the drag coeffi cient as a function of fl oc particle Reynolds number (R ep ). The results were compared with fl oc settling velocity results from different researchers. The model is able to defi ne the general behavior of fl oc settling velocity, which shows a reduction for larger fl ocs that is not taken into account in classical models. Only two parameters of the drag coeffi cient model for a permeable spherical particle are needed to be calibrated, for different types of sediments, in order to have more general applicability.

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Developments in recirculating systems for Arctic char culture in North America

Cited by 74 publications

References 15 publications

Broodstock management of the fine flounder Paralichthys adspersus (Steindachner, 1867) using recirculating aquaculture systems

Broodstock management of the fine flounder Paralichthys adspersus (Steindachner, 1867) using recirculating aquaculture systems

Farming different species in RAS in Nordic countries: Current status and future perspectives

A model for the settling velocity of flocs; application to an aquaculture recirculation tank

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