Phytoplankton evolution during the creation of a biofloc system for shrimp culture

Llario, Ferran; Rodilla, M.; Escrivá, J.; Falco, S.; Sebastiá-Frasquet, María-Teresa

doi:10.1007/s13762-018-1655-5

Cited by 19 publications

(16 citation statements)

References 60 publications

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“…Also, a higher concentration of total chlorophyll was observed in the recirculating systems, which may have been related to the increase in nitrogen compounds and phosphates, these being common detonators of microalgae in culture, the evidence also suggests an increase in flocs in the BFT systems (Llario, Rodilla, Escrivá, Falco, & Sebastiá-Frasquet, 2019). In our experiment, the number of microalgal cells was not quantified; however, they are known to form flocs and to be a dietary source consumed continuously by shrimp (Da Silva, Wasielesky, & Abreu, 2013).…”

Section: First Experimental Stagementioning

confidence: 65%

“…In this sense, the decrease in nitrogenated compounds is attributed to the increase in abundance of nitrifying bacteria and microalgae (Cohen, Samocha, Fox, & Lawrence, 2005) due to their demand for these compounds, as well as the decrease in alkalinity (CaCO 3 ) and calcium (

{Ca}_{2}^{+}

), and the lower demand for magnesium, as observed in our results. Also, a higher concentration of total chlorophyll was observed in the recirculating systems, which may have been related to the increase in nitrogen compounds and phosphates, these being common detonators of microalgae in culture, the evidence also suggests an increase in flocs in the BFT systems (Llario, Rodilla, Escrivá, Falco, & Sebastiá‐Frasquet, 2019). In our experiment, the number of microalgal cells was not quantified; however, they are known to form flocs and to be a dietary source consumed continuously by shrimp (Da Silva, Wasielesky, & Abreu, 2013).…”

Section: Discussionmentioning

confidence: 96%

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Polyculture of White shrimp (Penaeus vannamei) and sea cucumber (Holothuria inornata) in a biofloc system

et al. 2020

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In order to improve the cost-benefit relationship in aquaculture production systems, several technological advances have been formulated. The biofloc technology system (BFT) offers the advantage of functioning as a water treatment method, allowing the conversion of ammonium to nitrites and nitrates by using the properties of chemo-autotrophic bacteria. Biofloc technology system is considered a relevant cost-effective and ecological method, with potential use in aquaculture (Crab, Defoirdt, Bossier, & Verstraete, 2012). In addition, BFT promotes biosecurity by preventing the proliferation of pathogenic organisms, as well as the generation of bacterial protein flocs that are constantly renewed in the system, favouring the continuous in situ production of a microbial protein source (Avnimelech, 2012). The biofloc is constituted by a suspended heterogeneous mixture of microorganisms containing fungi, algae, microalgae, bacteria (autotrophic, chemo-autotrophic, photo-autotrophic, filamentous, heterotrophic), and flagellates and ciliates among other protozoa. The biofloc system also comprises organic matter in the form of colloids, organic polymers, alkaline earth metals, undigested food, organic waste, dead

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Section: First Experimental Stagementioning

confidence: 65%

{Ca}_{2}^{+}

Section: Discussionmentioning

confidence: 96%

Polyculture of White shrimp (Penaeus vannamei) and sea cucumber (Holothuria inornata) in a biofloc system

et al. 2020

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“…Maximum Chla concentration(703.58 µg/L) was higher than that found by Gaona et al [52] and Emerenciano et al [64] (500 µg/L), although it was below that observed by Schrader et al [65]. Chla concentration in BFT is highly variable, and depends on environmental conditions and changes that occur in the BFT itself [65,66]. In this experiment, two Chla peaks were observed at the beginning and at the end of the experiment due to shade cloths management.…”

Section: Effects On the Biofloc Systemmentioning

confidence: 67%

The Role of Bacillus amyloliquefaciens on Litopenaeus vannamei During the Maturation of a Biofloc System

Llario

Falco

Sebastiá-Frasquet

et al. 2019

JMSE

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Biofloc technology is a sustainable aquaculture production system which uses microorganisms to maintain water quality and to increase productivity. In this system, probiotics can enhance the positive effects of bioflocs on the cultured species. The objective of this research is to study the role of the probiotic bacterium Bacillus amyloliquefaciens during the formation of a biofloc system for the culture of Litopenaeus vannamei. Two doses of probiotic were assayed and applied directly to the water. The experiment was developed in nine tanks distributed as follows: Three control tanks with no probiotic, three tanks with a probiotic dose of 103 cfu/mL, and three tanks with a dose of 104 cfu/mL. Water quality, microbial activity, growth parameters and the immune system state of shrimps were monitored throughout the maturation process. The results indicate a positive effect upon the shrimp immune system throughout the study period, where specifically there was an increase in granular hemocytes in the shrimp hemolymph. During the immature biofloc phase, granular hemocytes were 5% higher in tanks supplemented with the probiotic. During the mature biofloc phase, granular hemocytes were 7% higher in those same tanks. During the maturation of the biofloc, environmental conditions are more unfavorable for shrimp growth, due to the accumulation of nitrites. So, the effect of the probiotic is especially important during this stage when the shrimp are stressed and are more vulnerable to diseases. However, the effects on microbial activity, water quality and Litopenaeus vannamei growth did not increase the benefits of the biofloc system.

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“…The dynamics of microalgae in aquaculture systems respond to a complex relationship between different environmental and biological variables (Alonso-Rodríguez and Páez-Osuna 2003;Pandey et al 2014;Llario et al 2018). Being able to understand these dynamics can help shrimp farmers to manipulate aquaculture systems for keeping the most desired microalgae composition.…”

Section: Introductionmentioning

confidence: 99%

“…Temperature, light and nutrients are environmental variables that have a key effect on microalgae abundance and composition (Yusoff et al 2002;Zhang et al2009). In general, low N:P ratios facilitate undesired species such as dinoflagellates and cyanobacteria blooms in aquaculture tanks (Alonso-Rodríguez and Páez-Osuna 2003), while high silica levels favors diatoms (Llario et al 2018). For periphyton, is also of paramount importance the effect of substrate.…”

Section: Introductionmentioning

confidence: 99%

Periphyton and phytoplankton assessment in a shrimp nursery: signature pigments analysis

Llario

Rodilla

Falco

et al. 2019

Int. J. Environ. Sci. Technol.

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Microalgae play a fundamental role in aquaculture systems, especially in nurseries. They can supplement the nutrition of cultured species, and also contribute to keep good water quality. Their value depends on the groups present in major abundance. Thus, being able to understand the factors that influence microalgae composition is key for an improved system management. In this study, the microalgae community structure in a Marsupenaeus japonicus nursery is studied. Instead of the classic microscopy approach, the composition and abundance of periphyton and phytoplankton were analyzed using signature pigments analysis by high pressure liquid chromatography coupled with the software CHEMTAX. The environmental parameters, which could affect periphyton and phytoplankton groups, were analyzed statistically. The results showed that diatoms were the dominant group both in phytoplankton and periphyton. The analysis of signature pigments, allowed to report the presence of previously undetected groups on periphyton, prasinophytes and prymnesiophytes, which are characterized by a high nutritional value. This is especially important in nurseries because of shrimp grazing on periphyton can increase post-larvae survival. Nutrients played a key role on phytoplankton development, but had a minor effect on periphyton, which was more affected by colonization processes and other environmental variables.

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Phytoplankton evolution during the creation of a biofloc system for shrimp culture

Cited by 19 publications

References 60 publications

Polyculture of White shrimp (Penaeus vannamei) and sea cucumber (Holothuria inornata) in a biofloc system

Polyculture of White shrimp (Penaeus vannamei) and sea cucumber (Holothuria inornata) in a biofloc system

The Role of Bacillus amyloliquefaciens on Litopenaeus vannamei During the Maturation of a Biofloc System

Periphyton and phytoplankton assessment in a shrimp nursery: signature pigments analysis

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