Sunflower Seed Cake and Larvae MassRheological Properties Analysis During Pressing WithVarying Temperature, Pressure and Oil Content

For the successful implementation of alternative protein sourcesforbiorefinery, optimization of the process parameters is crucial. Knowledge of the rheological propertiesis necessary for the design and development of appropriate equipment and process calculations.The objective of this research was to evaluate the effect of the following pre-treatments: temperature, pressure andeffect of initial oil content on the rheological properties of sunflower seedcake and larvae tissue. The rheological behavior of two protein sourceswas determined by using a rotational viscometer with a hydraulic system and thermostatic bath attached to the equipment. Using the mathematical apparatus and experimental data it was observed that the plastic viscosity of the sunflower seed cake corresponded to the viscosity of the vegetable oil, which confirmed the Bingham rheology assumption put forward in this work. For the larvae mass, a Hershey Buckley fluid model was proposed.A positive linear relationship was found for pressure and a negativelinear relationship was found for the oil content of the sunflower seed cake and larvae tissue on shear stress. Keywords: rheological property, sunflower seed cake, larvae, pulsed electricaldischarge, viscoplasticity flow, Bingham model, modelling

Torula yeast in the diet of Atlantic salmon Salmo salar and the impact on growth performance and gut microbiome

Atlantic salmon aquaculture is expanding, and with it, the need to find suitable replacements for conventional protein sources used in formulated feeds. Torula yeast (Cyberlindnera jadinii), has been identified as a promising alternative protein for feed and can be sustainably cultivated on lignocellulosic biomasses. The present study investigated the impact of torula yeast on the growth performance and gut microbiome of freshwater Atlantic salmon. A marine protein base diet and a mixed marine and plant protein base diet were tested, where conventional proteins were replaced with increasing inclusion levels of torula yeast, (0%, 10%, 20%). This study demonstrated that 20% torula yeast can replace fish meal without alteration to growth performance while leading to potential benefits for the gut microbiome by increasing the presence of bacteria positively associated with the host. However, when torula yeast replaced plant meal in a mixed protein diet, results suggested that 10% inclusion of yeast produced the best growth performance results but at the 20% inclusion level of yeast, potentially negative changes were observed in the gut microbial community, such as a decrease in lactic acid bacteria. This study supports the continued investigation of torula yeast for Atlantic salmon as a partial replacement for conventional proteins.

Mulberry leaves as a feed source for livestock in Kenya: A Review

In Kenya, Mulberry is grown in less than a piece of an acre by most of the farmers. Current acreage of mulberry stands at 250, spread over Western, Nyanza, and Rift Valley and Coastal regions. Mulberry leaves are highly palatable and digestible (70-90%) to ruminants and can be fed to non-ruminants as part of feed ingredient. Protein content and essential amino acid profile in the leaves and young stems varies from 15 to 35% depending on the variety. The Mulberry leaves are highly applicable as supplements replacing concentrates for dairy cattle, as the main feed for goats and sheep, and as an ingredient in rabbits and pigs’ diets. Farmers growing mulberry fodder offer higher protein content to livestock than those relying on different varieties of Napier grass, which have failed to boost milk production despite the amounts fed. In non-ruminant production, fishmeal and soybean meals are the main source of protein. In ruminant production, cottonseed meal and canola meal are the main source of protein. These meals are expensive, inadequate in supply and of variable quality. This often leads to low egg production and poor-quality eggs, hence low income and poverty among farmers. Therefore, efforts have been made to identify locally available protein feed resources that can be used as a protein supplement for livestock. Mulberry leaf meal (MLM) has been identified as a locally available alternative protein and mineral source that are beneficial to livestock and have been proven to improve production. Int. J. Agril. Res. Innov. Tech. 11(2): 1-9, Dec 2021

Antioxidant activity of Gryllus assimilis meal hydrolysed by Aspergillus oryzae proteases

The consumption of insects is an alternative protein source of a high nutritional value, in comparison to other traditional animal and vegetable proteins, and is suitable for food and as animal feed. This work aimed to study the antioxidant activity of cricket meal (Gryllus assimilis) partially hydrolysed by proteases from a Aspergillus oryzae, which was cultivated in the cricket meal. The cricket meal showed great potential for obtaining protease from A. oryzae, with an average enzymatic activity of 112±8 U/g of dry substrate after 96 h of fermentation. The enzymatic extract applied to the cricket meal increased its antioxidant properties, increasing the reduction of the 2,2-diphenyl-1-picrylhydrazyl radical by 2 times, compared to non-hydrolysed cricket meal. These initial results are promising, demonstrating the benefits of the partial hydrolysis of cricket meal.

Mealworm (Tenebrio molitor) potencial in fish nutrition: a review

The creation of aquatic organisms it is constantly growing and with this comes the need to meet this demand with the increased production of inputs such as feed for aquaculture. Fish nutrition is mainly characterized by the use of fish meal and oil for the manufacture of rations for their food. Soybean bran is the second most used ingredient as a source of protein in the production of feed for aquaculture. However, these ingredients compete with other feed segments, increasing cost or reducing market availability. Therefore, alternative sources of protein must be studied and developed to meet this demand. In this sense, insects present themselves as sources of high quality protein, in addition to fatty acids, vitamins and minerals. Although there is a problem with large-scale production to meet the demand of the feed market, the ease of breeding certain species of insects is capable of making this reality possible. Thus, insects can be a likely alternative protein source in fish feed, replacing conventional sources. This review aims to evaluate the inclusion of mealworm in the fish diet, in terms of performance and discuss the results obtained.

Valorization of Macroalgae through Fermentation for Aquafeed Production: A Review

The increased development of aquaculture has resulted in increased demand for high-protein aquafeed. An increased demand for high-protein aquafeed means an increase in exploitation of unsustainable protein sources such as fishmeal for aquafeed production. Thus, alternative protein sources such as fermented macroalgae is explored. Fermented macroalgae had been tested as aquaculture diets in some studies, but with limited coverage in relation to aquaculture. Therefore, this review provides a new perspective regarding their nutritional qualities as aquaculture diets, and their impacts on growth performances of aquaculture animals.

Nutritive Value Variation and In Vitro Digestibility of Hempseed Meal

Hempseed meal (HSM) is left after oil extraction of hemp and may act as a protein source in livestock. The first phase of this research evaluated variation in nutritive value and in vitro dry matter digestibility (IVDMD) of HSM from various sources in North America; the second phase utilized IVDMD to evaluate the efficacy of hempseed meal as an ingredient in ruminant feed. In phase one, the source had no contribution to variance for neutral detergent fiber (NDF), acid detergent fiber (ADF), acid detergent lignin (ADL), or crude protein (CP) (p ≥ 0.20). However, batch within source contributed to variation for NDF (50%), ADF (37%), ADL (13%), and CP (31%; p ≤ 0.01). Irrespective of differences in nutritive value, there was no contribution to variation (p = 0.23) of any measured response on in vitro true digestibility (53.0%). In phase two, two experiments evaluated HSM IVDMD as (1) a concentrate replacement or (2) a protein replacement in rations at varying rates. In the first experiment, IVDMD decreased (p < 0.05) with increasing levels of HSM. In the second experiment, IVDMD decreased (p < 0.01) as HSM inclusion increased. Although IVDMD decreased as HSM inclusion increased, values still met the digestibility threshold for ruminant rations, indicating that HSM has potential as an alternative protein ingredient.

Innovative development of the meat industry in BRICS for the environment improvement

Global trends in food provision indicate the consumption of meat is increasing. The world’s population will reach 9.8 billion people by 2050, this leads to the predominance and growth of livestock rates over crop production in developed countries, where livestock products account for up to 60% of the gross agricultural product, as a result, that will facilitate the environment and climate change. Developing an alternative protein becomes the only remedy, since traditional production is unable to meet the growing demand for meat as almost 70% of total agricultural land is already occupied by traditional farming. Accounted facts prove the necessity in innovative development of meat industry in BRICS countries. The analysis of meat consumption in BRICS countries in 1995-2020 was carried out. It is determined over the past twenty-five years, the average per capita consumption of meat has increased by 1.8 times, while 25% of the world’s population lives in the studied countries. The negative impact of livestock breeding on the environment was revealed, explained by the high consumption of water and land resources as well as methane emissions into the atmosphere. BRICS meat industry innovative development based on alternative protein is argued and proven.