Effect of Phytase on Growth and Phosphorus Utilization in Japanese Flounder (Paralichthys olivaceus)

Sarker, Pallab K.; Hosokawa, Hidetsuyo

doi:10.21061/ijra.v10i1.1334

Cited by 4 publications

(3 citation statements)

References 20 publications

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“…Plant-derived proteins contain high levels of phytate-bound P (Mainstone & Parr 2002, Sarker et al 2006, which is largely (70%) indigestible to monogastric animals like fish, who lack endogenous phytase activity to liberate phytate P (NRC 1993). Thus, P ends up in fish culture effluents, which contribute to eutrophication (Mainstone & Parr 2002, Sarker et al 2009).…”

Section: Discussionmentioning

confidence: 99%

Reducing geosmin off-flavor compounds and waste outputs through dietary phosphorus management in rainbow trout aquaculture

Sarker¹,

Pilote²,

Auffret³

et al. 2014

Aquacult. Environ. Interact.

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The aquaculture industry has long recognized the need to reduce phosphorus (P) waste outputs associated with environmental impact, and reduce off-flavor producing compounds, which can impact the quality of the fish product. This study was undertaken to investigate the effects of dietary high P (HP) and low P (LP) on growth, nutrient digestibility, P retention, and P loading as well as their correlation to the synthesis of geosmin-associated off-flavor in a recirculating aquaculture system of rainbow trout Oncorhynchus mykiss. The above diets were fed to quadruplicate tanks of rainbow trout (average mass ± SD: 127.4 ± 3.1 g) for 84 d. Results showed that the effects of the HP and LP diets on growth and P retention were not significantly different. While the apparent digestibility of P and other nutrients were higher in fish fed the LP diet, P waste outputs and geosmin levels in the fillets of fish were higher in fish fed the HP diet. Magnesium (Mg 2+ ), potassium (K + ) and zinc (Zn 2+ ) concentrations in tank water were significantly lower in fish fed the HP diet than the LP diet in most of the sampling events. Furthermore, the tank water geosmin concentration was not strongly proportionally correlated with tank water-soluble P concentration for both the LP and HP diets. There was a strong proportional linear relationship between the geosmin concentration in tank water and in trout fillet for both the LP and HP diets. Results suggest that off-flavor contents in fish fillets and water were related to the dietary P level and metabolic P waste outputs into the system, findings that have implications for the formulation of sustainable diets for rainbow trout.

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Section: Discussionmentioning

confidence: 99%

Reducing geosmin off-flavor compounds and waste outputs through dietary phosphorus management in rainbow trout aquaculture

Sarker¹,

Pilote²,

Auffret³

et al. 2014

Aquacult. Environ. Interact.

View full text Add to dashboard Cite

show abstract

“…Replacing FM protein with terrestrial crop protein remains a significant challenge for the industry and has stimulated compensatory research such as adding single amino acids to provide missing essential amino acids. Single amino acids, compared to amino acids bound in intact protein, have the following drawbacks in aquafeed: fish cannot efficiently utilize the synthetic amino acids and excrete more N metabolic waste to the environment, and the costs and life cycle environmental impacts increase [ 51 , 52 , 53 , 54 ]. Other common antinutritional factors include trypsin inhibitors, haemagglutinins, phytic acid, gossypol, phytoestrogens, glucosinolates, erucic acid, alkaloids, and thiaminase [ 55 ].…”

Section: Significance Of Aquaculture and Aquafeedmentioning

confidence: 99%

Microorganisms in Fish Feeds, Technological Innovations, and Key Strategies for Sustainable Aquaculture

Sarker

2023

Microorganisms

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Aquaculture, the world’s fastest growing food sector, produces over half of all fish for human consumption. Aquaculture feeds include fishmeal and fish oil, extracted from wild-caught fish such as sardines, and poses ecological, food security, and economic drawbacks. Microalgae, yeasts, fungi, bacteria, and other alternative ingredients show promise as potential ingredients in aquafeeds that provide protein/amino acids, lipids, or omega-3 sources and sources of bioactive molecules. This review article discusses the issues that the literature often lacks data on, such as the recent development of using microorganisms, technological innovation, challenges, and opportunities to develop a low environmental footprint of aquaculture diet. The ingredients often require novel processing technology to improve digestibility and fish growth and reduce antinutritional factors. This is an important gap to fill because microalgae are the most frequently used organism in fish feed, particularly as a dietary supplement or mixed with other ingredients. The production, processing, and formulating steps can affect the nutritional qualities. Stepwise strategies are required to evaluate these ingredients for feed application, and in this article, I articulated the stepwise key approaches of evaluating nutritional and environmental response metrics to develop highly sustainable aquaculture feed using these microorganisms, which would guide a more judicious inclusion of these novel ingredients.

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“…First, the total P (TP) content of fish meal always exceeds the minimal requirements of fish to obtain optimum growth 66 . Second, fish meal contains a content of high bone, and the TP is mainly composed of tricalcium phosphate (Ca 3 (PO 4 ) 2 ) and hydroxyapatite Ca 10 (PO 4 ) 6 (OH) 2 , 67 which are both mostly inaccessible for farmed aquatic animals 63,68 . Third, the limited availability of fishmeal has raised its cost, which is another factor that hinder sustainable aquaculture 69…”

Section: Uptake Efficiency Of Dietary Phosphorusmentioning

confidence: 99%

Review of waste phosphorus from aquaculture: Source, removal and recovery

Luo

2022

Reviews in Aquaculture

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The contribution of phosphorus to water body eutrophication is a global environmental problem, and rapid increases in aquaculture are considered a significant source of phosphorus discharged into the environment. The current review focuses on the source of aquaculture waste phosphorus and measures to decrease phosphorus release into the environment. Because diets are a significant source of phosphorus in fed aquaculture systems, improving the utilization efficiency of dietary phosphorus can reduce the amount of waste phosphorus at the source. A wide range of removal and recovery technologies has been identified, including adsorption, crystallization, enhanced biological phosphorus removal (EBPR), denitrifying phosphorus removal, heterotrophic nitrification aerobic denitrification (HAND) and photosynthetic organism removal. Recovery technologies were also reviewed, particularly sludge phosphorus from recirculating aquaculture systems. A new method using bacteria to immobilize waste nitrogen and phosphorus into bioflocs has been proposed as a better solution. However, most of these technologies have only been implemented at the lab scale to pilot scale. Further studies are necessary to determine the working conditions and removal capacities of related technologies on a commercial scale.Moreover, phosphorus removal methods must be selected based on a consideration of recyclability.

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Effect of Phytase on Growth and Phosphorus Utilization in Japanese Flounder (Paralichthys olivaceus)

Cited by 4 publications

References 20 publications

Reducing geosmin off-flavor compounds and waste outputs through dietary phosphorus management in rainbow trout aquaculture

Reducing geosmin off-flavor compounds and waste outputs through dietary phosphorus management in rainbow trout aquaculture

Microorganisms in Fish Feeds, Technological Innovations, and Key Strategies for Sustainable Aquaculture

Review of waste phosphorus from aquaculture: Source, removal and recovery

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