Nutrient uptake efficiency of Gracilaria chilensis and Ulva lactuca in an IMTA system with the red abalone Haliotis rufescens

Macchiavello, Juan; Bulboa, Cristian

doi:10.3856/vol42-issue3-fulltext-12

Cited by 39 publications

(24 citation statements)

References 40 publications

(46 reference statements)

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“…Our experiments were planned to be repeated twice to address the effect of seasonality on the seaweeds' performance. It should be noted that both U. rigida and G. conferta displayed higher SGRs in dependency to preferred environmental conditions such as light and temperature, similar to previous studies (Friedlander et al 1987;Macchiavello & Bulboa 2014). In the present study, the optimal temperatures and irradiance for Figure 7 Average total ammonia nitrogen uptake rates (g m À2 day À1 ) of the different seaweed pairings.…”

Section: Discussionsupporting

confidence: 86%

A novel two‐stage seaweed integrated multi‐trophic aquaculture

Ashkenazi

Israel

Abelson

2018

Reviews in Aquaculture

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Marine aquaculture is undeniably a key future direction for the production of food. However, traditional aquaculture involves some significant drawbacks, the major one of which is the surplus discharge of organic matter and dissolved nutrients. To mitigate the environmental impact, integrated multi‐trophic aquaculture (IMTA) systems, which advocate the integration of fed fish with inorganic and organic extractive species, may offer a sustainable solution. This study focuses on an innovative experimental setting, integrating three marine macroalgae species (Ulva rigida, Gracilaria conferta, Hypnea musciformis) serially connected via two‐stage seaweed culture tanks to a finfish culture (the gilthead sea bream; Sparus aurata). The aim was to compare and assess the biofiltration and growth performances of the seaweeds, while altering their order in the two‐stage system. The results indicated U. rigida as the fastest growing species. Ulva rigida also displayed the highest total ammonia nitrogen (TAN) uptake rates and removal efficiency. The design allowed the production of high tissue protein and carbohydrate levels for potential biorefinery uses. Ulva rigida protein content averaged 23%, while that of H. musciformis and G. conferta averaged 25% and 18%, respectively. Hypnea musciformis and G. conferta grown under low nutrient conditions presented a significantly higher total carbohydrate content of nearly 50%, compared to 34% exhibited by U. rigida. In summary, the seaweed pairing in a two‐stage system did not inhibit the performance of each individual species and improved overall production. Consequently, it offers significant advantages for future IMTA systems.

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Section: Discussionsupporting

confidence: 86%

A novel two‐stage seaweed integrated multi‐trophic aquaculture

Ashkenazi

Israel

Abelson

2018

Reviews in Aquaculture

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“…In the application of macroalgae for bioremediation, the optimum macroalgal density is a main factor that should be used by farmers to obtain effective results [20,23]. The nonlinear effect found of macroalgal density on NUE (except NH 3 ) by C. lentillifera in our study (Table 4) confirms a previous study by Macchiavello and Bulboa [28]. The linear effect on NH 3 might have been due to the passive diffusion of NH 3 [14].…”

Section: Discussionsupporting

confidence: 85%

“…Of these, macroalgal density, salinity, and aeration can be controlled at farm levels depending on objectives of the aquaculture management [16,20,23]. As a decline in nutrient uptake and macroalgal growth occurs when macroalgal density and salinity are too high or too low [16,[24][25][26][27][28], it indicates the non-linear effects of these factors on nutrient uptake. Therefore, it is critical to determine the optimum levels of macroalgal density and salinity for the effective applications of macroalgae for aquaculture effluent treatment [16,18,20,[24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Macroalgal Density and Salinity for Nutrient Removal by Caulerpa lentillifera from Aquaculture Effluent

et al. 2019

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Determining the optimum levels of macroalgal density and salinity for removing aquaculture effluent has gained increasing research interest in recent years because of the growing concerns over environmental sustainability. Here, we determined the effects of macroalgal density and salinity on the uptake of NO2−, NO3−, NH3, and PO43− by Caulerpa lentillifera from the effluent of Poecilia latipinna using spectrophotometry. Laboratory experiments were conducted to measure nutrient uptake at five different macroalgal density levels (10, 20, 30, 40, and 50 g/L) and three salinity levels (20, 30, and 40 ppt) with and without aeration. Quadratic regression analysis revealed significant nonlinear and linear effects of macroalgal density on the uptake of NO2−, NO3−, NH3, and PO43−, where the maximum uptake was predicted to occur at the macroalgal densities of 31.6, 33.3, 50.0, and 20.0 g/L, respectively. Likewise, the effects of salinity on the uptake of NO2−, NO3−, NH3, and PO43− were significant and nonlinear where the maximum uptake was predicted to occur at the salinity levels of 29.1, 30.7, 29.5, and 29.5 ppt, respectively. The result of the effects of aeration was mixed but somewhat indicated a positive effect on the nutrient uptake within the 24 h period. Our results could help aquaculturists to minimize the excessive nutrients by C. lentillifera from aquaculture effluent while achieving long-term sustainable aquaculture production.

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“…The higher levels of protein content observed in Ulva growing on co-culture systems with abalone, either in the cage culture or in the land-based recirculating aqua culture system (RAS), would be related to its production under high nitrogen culture condition than those collected from nature where seawater contain low nutrient concentrations. Ulva has a good capability for removing nutrients, particularly nitrogen and phosphate from animal effluents (Robertson-Andersson et al, 2008;Macchiavello and Bulboa, 2014). Previous studies reported that Ulva can assimilate as much as 100% for NH 4 + and at least 80%…”

Section: Protein Contentmentioning

confidence: 99%

“…for NO 3 generated by abalone aquaculture (Macchiavello and Bulboa, 2014;Robertson and Andersson et al, 2008) and these nitrogen compounds increase protein and pigment content of the algae (Viera et al, 2005;Figueroa et al, 2009). Also, Ulva under culture, either in cage or in recirculating aqua culture system, that receives effluent from cultured animals (fish, crustacean or molluscs), benefit not only from a rich source of ammonia but also from an important and free source of dissolved inorganic C coming from animals respiration that becomes available for algal photosynthesis (Figueroa et al, 2009).…”

Section: Protein Contentmentioning

confidence: 99%

Changes in Proximate Content of Macroalgae Ulva Sp during Co-culture with Abalone Haliotis squamata in Coastal Waters of West Timor-Indonesia

Gimin¹,

Tjendanawangi²,

Yahyah³

2016

J Applied Chem. Sci.

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Abalone is luxurious sea food that fetches a very high price. To fulfil increasing market demand, aquaculture is a necessity. Feed is prerequisite for developing aqua culture for this species. In the absence of artificial diets, abalone growers have to depend entirely on macro algae such as Ulva sp harvested from natural population. Abalone are known to consume large amount of algal diet, thus dependence on wild algae could lead to a heavy exploitation of algae population. One of strategies to maintain the supply of Ulva sp is by culturing together with H. squamata in the same area. However, there is no information whether the cultured algae would match the nutritional quality of algae collected from the wild. This research evaluated the proximate composition of Ulva sp growing in two culture systems i.e., cage culture in open sea and recirculating aqua culture system (RAS) in land. The proximate of the cultured Ulva were compared with those freshly collected from the wild. Results showed that protein content differed significantly among the two cultured Ulva and the wild ones (P<0.05). Ulva cultured in RAS contained the highest level of protein (16.89±0.87 % dw), followed by those cultured in cage (11.29±0.31% dw), and the lowest occurred in the wild Ulva. Cultured and wild Ulva had high carbohydrate content ranged from 46.56±5.03 to 49.29±3.5% dw, but ANOVA showed no significant differences among the source of algae (P>0.05). Lipid was a minor component in Ulva with levels ranged from 0.25±0.05 to 0.9±0.31 % dw. There were significant differences in the lipid content among source of algae (P<0.05) with the highest level observed on Ulva grown in RAS, followed in decreasing order by Ulva grown in the cage and the wild ones. This study recommends that abalone growers should culture Ulva because it improves the nutritional quality of the algae and reduces dependence on the wild Ulva that could threaten the natural algal population.

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Nutrient uptake efficiency of Gracilaria chilensis and Ulva lactuca in an IMTA system with the red abalone Haliotis rufescens

Cited by 39 publications

References 40 publications

A novel two‐stage seaweed integrated multi‐trophic aquaculture

A novel two‐stage seaweed integrated multi‐trophic aquaculture

Optimization of Macroalgal Density and Salinity for Nutrient Removal by Caulerpa lentillifera from Aquaculture Effluent

Changes in Proximate Content of Macroalgae Ulva Sp during Co-culture with Abalone Haliotis squamata in Coastal Waters of West Timor-Indonesia

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