Effects of different harvesting and processing methods on Nannochloropsis oculata concentrates and their application on rotifer Brachionus sp. cultures

Sales, Rafael; Dérner, Roberto Bianchini; Tsuzuki, Mônica Yumi

doi:10.1007/s10811-019-01877-8

Cited by 15 publications

(9 citation statements)

References 37 publications

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“…In addition, Boeing (1997) reported that it was more difficult to keep the dried microalgae biomass in suspension in a traditional upwelling system for bivalve nurseries in comparison to fresh microalgae culture. Likewise, Sales et al (2019) observed that oven‐dried biomass, presented large particles and high sedimentation rates, resulting in poor performance when offered as feed for rotifers. On the other hand, when freeze‐dried, the biomass did not present this behaviour, was efficiently resuspended, and the sedimentation rates were equivalent to those of fresh microalgae culture.…”

Section: Effect Of Storage Methods On the Maintenance Of Biomass Qualitymentioning

confidence: 99%

“…After assessing both sedimentation rate and biomass consumption, strategies can be adopted to reduce feed waste. Sales et al (2019) adapted a methodology for estimating the sedimentation and feed ingestion rates, based on the study of Yúfera and Pascual (1985) and confirmed that the preservation method (chilled, frozen, freeze‐dried or oven‐dried) can interfere with feed ingestion.…”

Section: Replacing Fresh Microalgae Culture With Concentratesmentioning

confidence: 99%

“…To reach 15%–25% TSS for commercialization, a second processing, such as centrifugation, is required to remove the residual water (Uduman et al, 2010). In this sense, Sales et al (2019) applied a two‐step harvesting method. Here, flocculation, followed by centrifugation, was tested to produce a concentrate of N. oculata with 18% of TSS.…”

Section: Effects Of Culture Harvesting On the Production Of Microalga...mentioning

confidence: 99%

“…Nevertheless, in commercial hatcheries, microalgae culture is normally offered only once a day, which can lead to an overfill of the digestive tract of phytoplanktivores and a misuse of the feed, followed by periods of starvation. Sales et al (2019) estimated the sedimentation rate of microalgae and observed that higher amounts of biomass in the water correlates with higher sedimentation rates. Therefore, by offering microalgae once a day, the biomass sediments faster than if it was fractionated.…”

Section: Feed Dosag E a S A S Tr Ategy For B E T Ter Microalg Ae Cons...mentioning

confidence: 99%

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Concentrated microalgal biomass as a substitute for fresh microalgae produced on site at hatcheries

Sales

Lopes

Dérner

et al. 2022

Aquaculture Research

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Microalgae are essential for most aquaculture hatcheries as first‐feed for larvae. Even so, high labour costs and risk of production crashes have encouraged the search for fresh culture substitutes, such as microalgae concentrates. Despite their importance as a commodity for the aquaculture sector, the concentrates are not available worldwide, and consolidated knowledge is scarce. Therefore, this bibliographic study aimed review microalgae products available for hatcheries, identifying research gaps and suggesting opportunities for development. In most studies, microalgae cultures were harvested by centrifugation, and biomass was stored chilled, frozen or dried (heat‐, spray‐ or freeze‐dried). The shelf life of microalgae products was dependent on the method of storage and microalgae species since robust species maintained their nutritional value for a longer period compared to more fragile ones, which would be sensitive to harvesting and storage. Thus, the use of concentrates in some feeding trials resulted in poor zootechnical performance. These results have four possible explanations: cell ingestion difficulty, low feed digestibility by phytoplanktivores animals, biomass degradation or inadequate choice of microalgae species. However, these limitations can be overcome by fractionating feed portions and adapting the culture tanks and aeration systems, but mainly by determining the ideal method for storing biomass and shelf life for each microalgae species. Taken together, our findings show that the application of microalgae concentrates can enhance the efficiency and profitability of aquaculture hatcheries.

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Section: Effect Of Storage Methods On the Maintenance Of Biomass Qualitymentioning

confidence: 99%

Section: Replacing Fresh Microalgae Culture With Concentratesmentioning

confidence: 99%

Section: Effects Of Culture Harvesting On the Production Of Microalga...mentioning

confidence: 99%

Section: Feed Dosag E a S A S Tr Ategy For B E T Ter Microalg Ae Cons...mentioning

confidence: 99%

See 2 more Smart Citations

Concentrated microalgal biomass as a substitute for fresh microalgae produced on site at hatcheries

Sales

Lopes

Dérner

et al. 2022

Aquaculture Research

Self Cite

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“…Furthermore, dried foods and preservable microalgae are considered preferable for achieving a facile culture and for the nutritional enrichment of Artemia because of their contributions to the reduction in microalgae cultures. The microalgae genera Chlorella and Nannochloropsis have thick cell walls, and therefore, their living cells can be concentrated at high densities of over 10 10 cells ml −1 and are capable of preservation in a refrigerator for months (Camacho‐Rodríguez et al, 2016; Maruyama et al, 2007; Sales et al, 2019). Moreover, their shelf life can be further prolonged using sterilization treatment (Dan, Ashidate, et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Capability of Artemia to digest Chlorella vulgaris and Nannochloropsis oculata under stagnant culture conditions

Dan

Yamashita

Matsunari

et al. 2022

Aquaculture Research

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Artemia is an important live food for rearing aquatic zooplanktivorous animals (Dhont et al., 2013;Dhont & van Stappen, 2003;Sorgeloos et al., 2001). The size of Artemia franciscana from Great Salt Lake, Utah, USA, which is the most widely adopted strain in hatcheries and laboratories, ranges from 0.4 mm to 12 mm in total length (TL) depending on life stage. This size range is suitable for consumption by larvae and juveniles of various commercially important fish, crustacean and cephalopod species, most of which exhibit aggressive feeding behaviour on Artemia (Dhont et al., 2013;Sorgeloos et al., 2001). Furthermore, a sufficient supply of Artemia can be obtained from commercially available cysts, which can be stored for years at low temperatures. For these reasons, the use of Artemia is essential for the production of juveniles of many species for aquaculture, stock enhancement programmes and the farming of aquatic ornamental species.A number of reports have discussed hatching technologies, culture methods, ontogenetic changes in nutritional status and nutritional enrichment methods of Artemia in terms of improving dietary values for cultured animals (

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Enriching Rotifers with “Premium” Microalgae: Rhodomonas lens

2019

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Effects of different harvesting and processing methods on Nannochloropsis oculata concentrates and their application on rotifer Brachionus sp. cultures

Cited by 15 publications

References 37 publications

Concentrated microalgal biomass as a substitute for fresh microalgae produced on site at hatcheries

Concentrated microalgal biomass as a substitute for fresh microalgae produced on site at hatcheries

Capability of Artemia to digest Chlorella vulgaris and Nannochloropsis oculata under stagnant culture conditions

Enriching Rotifers with “Premium” Microalgae: Rhodomonas lens

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