Production and use of a flocculated paste of Nannochloropsis oculata for rearing newborn seahorse Hippocampus reidi

Sales, Rafael; Mélo, Roberta Cecília Silfrônio; Moraes, Ramon Maciel de; Silva, Rayane Cristine Santos da; Cavalli, Ronaldo Olivera; Navarro, Daniela Maria do Amaral Ferraz; Souza-Santos, Lília P.

doi:10.1016/j.algal.2016.04.024

Cited by 12 publications

(7 citation statements)

References 53 publications

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“…In order to meet global demand and ensure the sustainability of natural populations, H. reidi cultivation techniques have been improved throughout the years (Carvalho et al, ; Hora & Joyeux, ; Hora et al, ; Hora, Joyeux, & Tsuzuki, ; Mélo et al, ; Randazzo et al, ). Still, the main obstacles for the intensive production of H. reidi , as well as for other seahorses species, are the nutritional and feeding aspects, especially during the initial stages of cultivation (Blanco, Planas, & Moyano, ; Novelli et al, , ; Ofelio, Díaz, Radaelli, & Planas, ; Olivotto et al, ; Palma, Bureau, & Andrade, ; Randazzo et al, ; Sales et al, ; Souza‐Santos, Regis, Mélo, & Cavalli, ; Willadino et al, ).…”

Section: Introductionmentioning

confidence: 99%

Use of Artemia supplemented with exogenous digestive enzymes as sole live food increased survival and growth during the larviculture of the longsnout seahorse Hippocampus reidi

et al. 2020

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This study evaluated the effect of exogenous digestive enzymes on the survival, growth performance and morphology of the digestive tract of juveniles of the longsnout seahorse Hippocampus reidi fed exclusively with Artemia and supplemented with five different concentrations of porcine pancreatin (PP) (0, 5, 25, 50 and 75 mg/L from birth until 30 days after release). The results found in the present study clearly show that there was a significant increase in survival and growth as well as substantial changes in the morphology of intestinal villi in seahorses fed exclusively with Artemia supplemented with 75 mg/L PP. Therefore, the use of digestive enzyme supplementation constitutes an important advance for the establishment of a more efficient and practical feeding protocol (exclusive use of Artemia) for juveniles of the longsnout seahorse.

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Section: Introductionmentioning

confidence: 99%

Use of Artemia supplemented with exogenous digestive enzymes as sole live food increased survival and growth during the larviculture of the longsnout seahorse Hippocampus reidi

et al. 2020

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“…oculata still presented 20%-40% of aggregates after resuspension in culture media (Sales et al, 2016).…”

Section: Microalgae Used In Feeding Experiments (%)mentioning

confidence: 94%

“…The resuspension rate varies among microalgae species; for instance, the flocculated concentrate of Chaetoceros calcitrans was easily resuspended after adjusting the pH (Brown & Robert, 2002). In contrast, the concentrate of the microalgae N. oculata still presented 20%–40% of aggregates after resuspension in culture media (Sales et al, 2016).…”

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

confidence: 99%

“…Similarly, flocculation of a Scenedesmus obliquus culture using FLOPAM® did not alter the fatty acid profile of the biomass in comparison to centrifugation (de Oliveira et al, 2020). On the other hand, the flocculation of N. oculata cultures with only NaOH significantly reduced the lipid extraction yields and the percentage of PUFAs (Borges et al, 2016), while, for the same species, flocculation combining NaOH and FLOPAM® did not affect the fatty acid profile (Sales et al, 2016). For that reason, different flocculants and their dosages must be evaluated for each microalgae species to determine an efficient harvesting method, especially one that does not reduce nutritional value of the biomass.…”

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

confidence: 99%

“…In addition, larger particle size, is correlated to rapid sinking, thus preventing ingestion. In order to resuspend the flocculated cells using NaOH and polyelectrolyte, some authors added hydrochloric acid (HCl) to the biomass after separation in order to readjust the pH to the initial value (8 to 8.5) (Knuckey et al, 2006; Ponis, Robert, & Parisi, 2003; Sales et al, 2016; Tanyaros et al, 2016). Alternatively, the pH of the concentrate was neutralized by adding CO 2 (Rojo Cebreros et al, 2016).…”

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

confidence: 99%

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

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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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Nutritional value and production performance of the rotifer Brachionus plicatilis Müller, 1786 cultured with different feeds at commercial scale

Eryalçın

2019

Aquacult Int

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Production and use of a flocculated paste of Nannochloropsis oculata for rearing newborn seahorse Hippocampus reidi

Cited by 12 publications

References 53 publications

Use of Artemia supplemented with exogenous digestive enzymes as sole live food increased survival and growth during the larviculture of the longsnout seahorse Hippocampus reidi

Use of Artemia supplemented with exogenous digestive enzymes as sole live food increased survival and growth during the larviculture of the longsnout seahorse Hippocampus reidi

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

Nutritional value and production performance of the rotifer Brachionus plicatilis Müller, 1786 cultured with different feeds at commercial scale

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