Shrimp are economically important candidates for aquaculture in Tanzania; however, their farming is constrained by reliance on costly feeds, attributed to the use of fishmeal as main ingredient. This study determined efficacy green algae Chaetomorpha sp. survival, feed utilization, biochemical composition, and fatty acids profile cultured Penaeus monodon a potential candidate replacing fishmeal...

Feed-food competition is the allocation of resources that can be used to feed humans animal instead, a current but unsustainable practise not well documented for aquaculture. Here, we analysed feed-food in aquaculture using two measures; natural trophic levels (TLs) and species-specific human-edible protein conversion ratios (HePCRs). The HePCR equals ratio human edible (input) produce (output)...

Microalgae are recognized as a high-nutritional quality non-conventional feed resource which can contribute to address the increasing food demand. This study focuses on breakthrough microalgal production system, based rotating biofilm, with objective of assessing and reducing its environmental impact for two microalgae-based products: algal biomass protein concentrate (algae meal). The methodol...

Insect proteins are considered as suitable low environmental impact alternatives to fishmeal for sustainable aquafeeds. Among the different insect species, Hermetia illucens has attracted research and industrial interest due its ability grow well on organic side streams, high protein content favorable amino acid profiles. Its lipid although is characterized by a lack of EPA DHA that essential f...

The aim of the present study was to test whether the dietary non-essential/conditionally essential amino acid composition has an effect on growth and protein utilisation and on δ13C of individual amino acids in rainbow trout (Oncorhynchus mykiss). Trout were reared on six purified diets containing only synthetic amino acids in place of protein. Diet 1 mimicked the amino acid composition of fish...

The amino (AA) profile of eight feedstuffs (two samples of fishmeal, soybean meal [SBM], formaldehyde-treated SBM, sopralin, cotton-seed meal [CSM], rapeseed meal [RSM], corn distillers grains [CDG], and corn gluten feed [CGF]) was determined before and after ruminal incubation for 8 and 12 h in three lactating Friesian cows using nylon bags. The profile of AA disappearing during intestinal pas...

Amidst overexploited fisheries and further climate related declines projected in tropical fisheries, marine dependent small-scale fishers in Southeast Asia face an uncertain future. Yet, small-scale fishers are seldom explicitly considered in regional fisheries management and their contribution to national fish supply tends to be greatly under-estimated compared to industrial fisheries. Lack of...

Most studies on dietary vegetable oil in rainbow trout (Oncorhynchus mykiss) have been conducted on a background of dietary EPA (20 : 5n-3) and DHA (22 : 6n-3) contained in the fishmeal used as a protein source in aquaculture feed. If dietary EPA and DHA repress their endogenous synthesis from α-linolenic acid (ALA, 18 : 3n-3), then the potential of ALA-containing vegetable oils to maintain tis...

Plant products in general and soybeans in particular can challenge the function and health of the intestinal tract. Salmonids develop an intestinal inflammation when fed diets containing soybean meal (SBM) and certain other legume ingredients. In the present study a 44K oligonucleotide salmonid microarray, qPCR and histology were used to investigate early response mechanisms in the distal intes...

A pilot-plant twin screw extrusion study was performed in two twice-replicated trials with the goal of producing vegetable-based protein feeds for juvenile yellow perch. Two isocaloric (3.06 kcal/g) experimental diets were balanced to contain 20% and 40% DDGS, and a constant amount (20 %) of fermented high protein soybean meal (PepSoyGen, PSG), as the fishmeal protein replacers, in combination ...