Biofloc improves water, effluent quality and growth parameters of Penaeus vannamei in an intensive culture system

The present work aimed at determining the effects of the association between the periphyton-based system with the bioflocs-based system in the intensive culture of juvenile Nile tilapia (1.56 ± 0.07 g; 72 fish m-3), on variables of water quality, growth performance and effluent quality after 10 weeks. The experiment was arranged in a 2 x 2 factorial randomized block design with four treatments and five repetitions each. The factors tested were the following: ‘underwater structure’ (absence and presence) and ‘adjustment of the C: N ratio of water’ (no and yes). The final fish body weight, specific growth rate and yield were higher (p < 0.05) in the C: N-adjusted tanks. The presence of submerged structures in the tanks had no significant influence on those same variables. It was concluded that the periphyton-based system is not indicated for intensive farming of Nile tilapia, in which there is a high allowance of artificial feed to fish.

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An improved method of cell culture system from eye stalk, hepatopancreas, muscle, ovary, and hemocytes of Penaeus vannamei

In Vitro Cellular & Developmental Biology - Animal ◽

10.1007/s11626-010-9343-x ◽

2010 ◽

Vol 46 (9) ◽

pp. 801-810 ◽

Cited By ~ 29

Author(s):

Sunil K. George ◽

Arun K. Dhar

Keyword(s):

Cell Culture ◽

Culture System ◽

Penaeus Vannamei ◽

Cell Culture System ◽

Improved Method

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Determining Water Use and Crop Coefficients of Five Woody Landscape Plants

Journal of Environmental Horticulture ◽

10.24266/0738-2898-24.3.160 ◽

2006 ◽

Vol 24 (3) ◽

pp. 160-165 ◽

Cited By ~ 1

Author(s):

G. Niu ◽

D.S. Rodriguez ◽

R. Cabrera ◽

C. McKenney ◽

W. Mackay

Keyword(s):

Leaf Area ◽

Water Use ◽

Culture System ◽

Growth Parameters ◽

Growth Index ◽

Crop Coefficient ◽

Nerium Oleander ◽

Culture Systems ◽

Unit Leaf ◽

Crop Coefficients

Abstract The water use and crop coefficient of five woody landscape species were determined by growing the shrubs both in 56-liter (15 gal) drainage lysimeters and in above-ground 10-liter containers (#3). Water use per plant, crop coefficient and overall growth parameters differed by species and culture system. Of the five species tested, Buddleia davidii ‘Burgundy’ and Nerium oleander ‘Hardy Pink’ had higher water use per plant in the lysimeters than in the containers. Water use per plant for Abelia grandiflora ‘Edward Goucher’, Euonymus japonica and Ilex vomitoria ‘Pride of Houston’ was the same for the two culture systems. Crop coefficient and growth index of A. grandiflora, E. japonica, and I. vomitoria was similar between the two systems. The growth index of B. davidii and N. oleander was much higher in the lysimeters than in the containers. Abelia grandiflora and E. japonica had more growth in the containers than in the lysimeters while I. vomitoria had slightly larger leaf area in the lysimeters than in the containers. The culture system did not affect the water use per unit leaf area of all species. Therefore, our results indicated that by quantifying the leaf area, the plant water use in the two culture systems is exchangeable.

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Enhancing Ecoefficiency in Shrimp Farming through Interconnected Ponds

BioMed Research International ◽

10.1155/2015/873748 ◽

2015 ◽

Vol 2015 ◽

pp. 1-10 ◽

Cited By ~ 1

Author(s):

Ramón Héctor Barraza-Guardado ◽

José Alfredo Arreola-Lizárraga ◽

Anselmo Miranda-Baeza ◽

Manuel Juárez-García ◽

Antonio Juvera-Hoyos ◽

...

Keyword(s):

Culture System ◽

Water Exchange ◽

Nutrient Recycling ◽

Traditional Culture ◽

Shrimp Farming ◽

Nitrogen Compounds ◽

Intensive Culture ◽

Production Parameters ◽

Daily Water ◽

Interconnected Ponds

The future development of shrimp farming needs to improve its ecoefficiency. The purpose of this study was to evaluate water quality, flows, and nitrogen balance and production parameters on a farm with interconnected pond design to improve the efficiency of the semi-intensive culture ofLitopenaeus vannameiponds. The study was conducted in 21 commercial culture ponds during 180 days at densities of 30–35 ind m−2and daily water exchange <2%. Our study provides evidence that by interconnecting ponds nutrient recycling is favored by promoting the growth of primary producers of the pond as chlorophylla. Based on the mass balance and flow of nutrients this culture system reduces the flow of solid, particulate organic matter, and nitrogen compounds to the environment and significantly increases the efficiency of water (5 to 6.5 m3 kg−1cycle−1), when compared with traditional culture systems. With this culture system it is possible to recover up to 34% of the total nitrogen entering the system, with production in excess of 4,000 kg ha−1shrimp. We believe that the production system with interconnected ponds is a technically feasible model to improve ecoefficiency production of shrimp farming.

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