https://www.webpages.uidaho.edu/fish510/PDF/fishmeal.pdf

Global overview on the use of fish meal and fish oil in industrially compounded aquafeeds: Trends and future prospects

Nutrient requirements of dairy cattle , Nutrient requirements of dairy cattle , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی

Nutrient requirements of dairy cattle

What is ecological speciation

Global demand for macroalgal and microalgal foods is growing, and algae are increasingly being consumed for functional benefits beyond the traditional considerations of nutrition and health. There is substantial evidence for the health benefits of algal-derived food products, but there remain considerable challenges in quantifying these benefits, as well as possible adverse effects. First, there is a limited understanding of nutritional composition across algal species, geographical regions, and seasons, all of which can substantially affect their dietary value. The second issue is quantifying which fractions of algal foods are bioavailable to humans, and which factors influence how food constituents are released, ranging from food preparation through genetic differentiation in the gut microbiome. Third is understanding how algal nutritional and functional constituents interact in human metabolism. Superimposed considerations are the effects of harvesting, storage, and food processing techniques that can dramatically influence the potential nutritive value of algal-derived foods. We highlight this rapidly advancing area of algal science with a particular focus on the key research required to assess better the health benefits of an alga or algal product. There are rich opportunities for phycologists in this emerging field, requiring exciting new experimental and collaborative approaches.

https://link.springer.com/content/pdf/10.1007%2Fs10811-016-0974-5.pdf

Algae as nutritional and functional food sources: revisiting our understanding

Integrated aquaculture: rationale, evolution and state of the art emphasizing seaweed biofiltration in modern mariculture

Physiological effects of micro-plastics on the red algae, Grateloupia turuturu and Chondrus sp.

Carrageenan is a type of polysaccharides found in some seaweed species called carrageenophytes and is an essential compound in various pharmaceutical, food and cosmeceutical products. Alkali treatment is an industrial extraction method of carrageenan to improve gel quality. This method, however, has disadvantages, including producing effluents and decreasing gel yield. This study is to optimize the dark treatment duration of Chondrus crispus which is known to be an eco-friendly alternative to the alkali treatment for gel quality and yield improvements of hybrid carrageenans. In the 20-day dark treatment, yield and gel strength of carrageenan were significantly higher than control. The gel strength at the 20-day dark treatment was similar to that of alkali treatment. Sulfate content decreased as the gel strength increased. These results suggest that a dark treatment can be an alternative extraction method for carrageenan in C. crispus replacing the alkali treatment. • Twenty-day dark treatment enhances yield and gel strength of κ/ι-hybrid carrageenan. • The dark treatment can be an alternative, green method for carrageenan extraction. • Sulfate content decreased as the gel strength increased. 

Dark treatment effect on the carrageenan characterization in a red alga, Chondrus crispus

Fluorescent lamps and semiconductor light-emitting diodes (LEDs) lamps are commonly used as artificial light sources in the indoor algae cultivation system. In this study, we tested the effect of two types of fluorescent lamps (T8 and T5) and white LED lamp on the growth, photosynthesis, and nutrient uptake rates of Neopyropia yezoensis and Ulva prolifera under three photosynthetically active radiation (PAR) conditions (80, 150 and 300 μmol photon m2 s−1). White LED and T8 fluorescent light induced the highest and the lowest growth rates, respectively, in both species under each PAR. The effect of T5 fluorescent light on growth rate depends on the species and PAR. Interestingly, the T8 fluorescent light significantly increased the uptake rate of phosphorus under all PARs and nitrogen uptake rate was enhanced under 150 μmol photon m2 s−1 in U. prolifera, which was not observed in N. yezoensis. Our results suggest that white LED lamp is a more economical and efficient artificial light source than fluorescent lamps because of their highest enhancement of growth. The optimal PAR of T5 fluorescent light for growth is lower than T8 fluorescent light in the cultivation of U. prolifera. T8 fluorescent increases phosphorous uptake rate in U. prolifera. 

Effects of different artificial photosynthetically active radiation (PAR) sources and intensity on the growth and nutrient uptake in Ulva prolifera and Neopyropia yezoensis

Introduction Heat stress is one of the main threats for the seaweed aquaculture, leading to the decay of the blades and causing serious economic losses. A newly developed biostimulant, Sargassum horneri extract (SHE), can enhance the heat-tolerance in Neopyropia yezoensis, which can be applied in the seaweed aquaculture. However, the molecular mechanism underlying this acquired heat-tolerance is still unclear. Method In this study, we examined the transcriptional regulation of N. yezoensis under heat stress after the SHE pre-treatment by performing the RNA-Seq on illumina Novaseq platform and differentially expressed gene analysis. Result and discussion Our results show that, under heat stress, the SHE pre-treatment can alleviate the suppression of genes involved in normal cell activities, such as ribosome biogenesis, photosynthesis, respiration and cell cycle. On the other hand, SHE pre-treatment can also induce some key genes involved in the heat-tolerance. We also found that the combination of SHE pre-treatment and heat stress can induce some genes related to epigenetic modification, suggesting that SHE may facilitate the formation of heat stress memory in N. yezoensis. Our study provides information for understanding the molecular mechanism of heat-tolerance in N. yezoensis and for promoting the application of seaweed-derived biostimulants in the seaweed aquaculture.

/pdf/comparative-transcriptome-analysis-reveals-the-molecular-2p7tr151.pdf

Charles Yarish

Papers

Physiological effects of micro-plastics on the red algae, Grateloupia turuturu and Chondrus sp.

Dark treatment effect on the carrageenan characterization in a red alga, Chondrus crispus

Effects of different artificial photosynthetically active radiation (PAR) sources and intensity on the growth and nutrient uptake in Ulva prolifera and Neopyropia yezoensis

Comparative transcriptome analysis reveals the molecular mechanism of heat-tolerance in Neopyropia yezoensis induced by Sargassum horneri extract

Seaweed blue carbon: Ready? Or Not?