Estimation of flow in a rearing tank of marine fish larvae by simplified numerical computation—a case of two-dimensional flow

Shiotani, Shigeaki; Hagiwara, Atsushi; Sakakura, Yoshitaka; Chuda, Hisashi

doi:10.1016/j.aquaeng.2004.09.006

Cited by 24 publications

(19 citation statements)

References 3 publications

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“…For instance, larvae respond behaviourally to factors of visual environment (Naas & Mangor‐Jensen ; Puvanendran & Brown ; Nicolaisen & Bolla ) and water velocity (Davis ; Shiotani et al . ), which may affect distribution and ultimately bias sampling. In sum, sampling issues in fish larvae studies constitute a ‘black box’.…”

Section: Discussionmentioning

confidence: 99%

Issues of aquatic experimentation in research on marine finfish larval production in Europe and North America

Nicolaisen

2017

Reviews in Aquaculture

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The aim of this review was to examine practices in academic research focusing on production of larvae of European marine fish species. The literature spanned peer‐reviewed articles over the years 1977–2014 for the main commercially produced marine species: Atlantic cod, halibut, sea bream, sea bass and turbot. Search hits were categorized into the main themes basic biology, natural habitat studies and aquaculture, and the latter theme further subdivided into nutrition, health, reproduction and production factor studies. In total, 74 of the production factor studies were thoroughly examined in terms of overall research structure, study designs, methods, analyses and reporting practices. A picture of a fragmented whole with many isolated contributors and limited cooperation appeared, and despite the multivariate nature and high complexity of the area, isolated and low replicated studies focusing on one variable at the time dominated. Randomization and blinding procedures were rarely accounted for, and a need to standardize practical conduct of research in terms of physical infrastructure, biological material used, control of tank environment, sampling, tank tending and response measurements appeared. Issues of statistical analysis were also apparent, spanning the choice of main techniques and follow‐up contrast procedures and Pseudoreplication. Additionally, the reporting of designs, analyses and results was often incomplete. Consequences of the different issues are discussed, and possible remedies proposed. The findings are in accordance with conclusions from contemporary studies addressing scientific quality and methodological issues at other areas of research.

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Section: Discussionmentioning

confidence: 99%

Issues of aquatic experimentation in research on marine finfish larval production in Europe and North America

Nicolaisen

2017

Reviews in Aquaculture

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“…Further, it was inferred that the rotation velocity of the agitator blade affected the survival rate of the snow crab larvae because it was higher in tank B (0.5 times/min) than in tank C (once/min). It was reported that the intensity of water flow, which is controlled by the amount of aeration in the rearing water, affected the survival and growth of some hatchery‐reared marine fish larvae 18–20 . Larvae of the seven‐band grouper Epinephelus septemfasciatus significantly decreased their prey consumption, growth and survival rates by the physical stress of intensive water flow 18,19 .…”

Section: Discussionmentioning

confidence: 99%

Improvement of larval rearing technique for mass seed production of snow crab Chionoecetes opilio

2007

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Larval rearing experiments were conducted to examine the potential for mass seed production of the snow crab Chionoecetes opilio using a total of eight 20-kL tanks. Tanks were equipped with agitators, which move the water using a rectangular blade to prevent the zoeas sinking to the bottom of the tank. Larval rearing water was treated with sodium nifurstyrenate once a week to reduce the chance of larval infection by pathogenic bacteria. Zoeas were fed with rotifers and Artemia nauplii. A total of 122 830 megalops and 16 660 first-stage crabs were produced. Thus, the potential for mass seed production of snow crab was determined. Survival rates up to the megalopal stage were high in tanks with a feeding regime that fed rotifers to larvae through an entire zoeal stage. This study also describes the fatty acid composition of snow crab larvae. It revealed that the first zoeas had a high DHA content and DHA/EPA ratio, but these values significantly decreased in the second stage zoeas and megalops. Improving the DHA content and/or DHA/EPA ratio of larvae should be important in studies on mass seed production technology of the snow crab.

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“…Velocity measurement in a rearing tank has been performed by Shitotani et al using an ultrasonic velocity meter [2]- [3]. However, since the sensor was inserted in the tank, the flow field in the tank may be disordered due to sensor itself.…”

Section: Velocity Measurement Methods Using Pivmentioning

confidence: 99%

“…To date, there has been no clarification of the flow field states in a typical rearing tank. On the other hand, an optimum aeration rate has been proposed to be suitable for rearing fish larvae [2]- [3]. Aeration may reduce early mortality if controlled such that a suitable flow field environment can be maintained in fish rearing tanks.…”

Section: Introductionmentioning

confidence: 99%

Relationship between Aspect Ratio and Flow Fields in a Rearing Tank

Sumida

Shiotani

Yamazaki³

2015

J. Abmech

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Abstract-Aeration rates and tank geometry result in different larvae survival rates [1]-[6]. This study reports new results about the flow field in a rearing tank. Specifically, the effects of the aspect ratio AR (the ratio of water depth to tank radius) on overall flow fields were clarified from flow visualization and PIV (Particle Image Velocimetry) experiments. Two different types of flow patterns, a single-pair vortex system and twopair vortex system, were confirmed as the value of tank aspect ratio changed from 1.0 to 2.0.

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Estimation of flow in a rearing tank of marine fish larvae by simplified numerical computation—a case of two-dimensional flow

Cited by 24 publications

References 3 publications

Issues of aquatic experimentation in research on marine finfish larval production in Europe and North America

Issues of aquatic experimentation in research on marine finfish larval production in Europe and North America

Improvement of larval rearing technique for mass seed production of snow crab Chionoecetes opilio

Relationship between Aspect Ratio and Flow Fields in a Rearing Tank

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