Yellowtail kingfish have a poor faecal integrity when fed with pelleted diets which may be due to the presence of dietary starch. Moreover, whether starch interacts plant protein ingredients, is not known. In this study, we investigated effect level, source and their interaction on waste production characteristics (visual appearance, removal efficiency particle size distribution (PSD)). Four were formulated according 2 × factorial design (starch level source). The was tested by either...

Hunger affected 278 million people in Africa 2021, and Kenya, the proportion of population unable to afford a healthy diet is 81%. To combat hunger increase resilience throughout food system, spirulina ( Arthrospira platensis ) has been shown have remarkable properties. The main aim this study investigate whether protein from suitable alternative sourced fish meal feed for juvenile Nile tilapia Oreochromis niloticus ). In trial investigating use biomass on tilapia, it proven that fingerlings...

Due to their intermediate position between the machine and workpiece, tools represent interface of manufacturing system process. Near net shape production, new materials techniques are challenges in metal forming especially tooling. A significant economical effect can be achieved through an increase life tool elements, as well proper management strategies. The greatest problem connected with preliminary estimation is large scatter service for a series identically designed tools. uncertainty...

The aim of this study was to investigate swimming performance and oxygen consumption as non-lethal indicator traits production parameters in Atlantic salmon Salmo salar L. Gilthead seabream Sparus aurata A total 34 individual fish each species were subjected a series experiments: (1) critical speed (Ucrit) test swim-gutter, followed by (2) two starvation-refeeding periods 42 days, (3) experiments coupled respirometry swim-tunnels. Ucrit assessed first it predictor trait. Starvation-refeeding...

Abstract The effect of high pressure on the colour fish species was investigated to evaluate range treatments that did not influence appearance fish. High during 5 minutes higher than 150-200MPa resulted in a cooked pollack (Pollachius virens), mackerel (Scomber scombrus), tuna (Thunnus thynnus), cod (Gadus morhua), salmon trout (Salmon trutta), carp (Cyprinus carpio), plaice (Pleuronectus platessa) and anglerfish (Lophius piscatorius). Only octopus (Octopus vulgaris) retained raw till...

The effect of carbohydrate source on nutrient digestibility, bile acid balance, faecal waste production and characteristics were investigated in yellowtail kingfish (Seriola lalandi). A starch diet two non-starch polysaccharides (NSP) diets with different NSP sources used this study. containing 12 % gelatinized wheat flour as the diet, distinct sources: soybean hulls (SH) sugar beet pulp (SBP) at an inclusion level 10 %, studied. Each was tested triplicate fish tanks. To determine if feeding...

Larval zebrafish was subjected to a methodological exploration of the gastrointestinal microbiota and transcriptome. Assessed impact two dietary inclusion levels novel protein meal (NPM) animal origin (ragworm Nereis virens) on tract (GIT). Microbial development assessed over first 21 days post egg fertilisation (dpf) through 16S rRNA gene-based microbial composition profiling by pyrosequencing. Differentially expressed genes in GIT were demonstrated at dpf whole transcriptome sequencing...

Seaweeds may represent immuno-stimulants that could be used as health-promoting fish feed components. This study was performed to gain insights into the immunomodulatory effects of dietary seaweeds in Atlantic salmon. Specifically tested were 10% inclusion levels Laminaria digitata (SW1) and a commercial blend (Oceanfeed®) (SW2) against fishmeal based control diet (FMC). Differences between groups assessed growth, conversion ratio blood parameters hematocrit hemoglobin. After LPS challenge...

Dietary starch negatively affects faecal removal efficiency by sedimentation in yellowtail kingfish (Seriola lalandi). In general, research on waste management recirculating aquaculture systems (RAS) is conducted solid sedimentation. However, most commercial farms operate with screen filtration. Compared to sedimentation, where the of removed faeces depends particle size and density, filtration based its stability. Accordingly, this study investigated effect dietary level loading different...

The natural food source of yellowtail kingfish is low in starch, while under commercial farming condition, starch included at levels >8% to produce extruded diets. In this study, the effect dietary level on digestion kinetics and energy utilization was investigated. To achieve this, fish were fed equal amounts crude protein fat, combination with either a amount (LS diet; 0% gelatinized wheat flour) or high (HS 20% flour). Each diet tested triplicate. Six tanks stocked 24 (mean initial weight...

In this study, the effect of dietary macronutrient composition on energy utilisation efficiency for growth using digestible (DE) approach was evaluated African catfish (Clarias gariepinus). Furthermore, efficiencies protein, fat and carbohydrates were estimated net (NE) approach. The experiment had a 4 × 2 factorial design. C. gariepinus (71.6 g) fed one four diets, each at two feeding levels (12 vs 22 g.kg−0.8.d−1), 30 days. Diets formulated with aim to create large contrasts in protein...

This study aimed to assess the effect of dietary macronutrient composition on relationship between RE and DE intake (i.e., maintenance energy requirements slope [kgDE]); quantify utilisation efficiencies digested protein, fat carbohydrates for whole body growth as well fillet in striped catfish (Pangasius hypoththalmus). To achieve these aims, a 63-day experiment was conducted (29.1 g). A total 4 diets were studied at 2 feeding levels, low vs. high (12 22 g.kg−0.8.d−1, respectively), which...

Fish-farming in Kenya is challenged by the availability and high cost of feed ingredients, especially protein sources. Using black soldier fly larvae ( Hermetia illucens ) (BSFL) directly or indirectly as a ingredient to fish interesting they efficiently convert organic wastes into high-quality proteins. In addition, freshwater shrimp Caridina nilotica (CN), an important by-catch silver cyprinid Rastrineobola argentea fisheries Lake Victoria, could be another alternative source. Therefore,...

Flatfish culture in re-use or recirculation aquaculture systems (RAS) is a relatively young production sector and hardly practiced on commercial scale (Blancheton, 2000; Labatut & Olivares, 2004...

Common sole fed with commercial pellets develop anaemia and are restricted in their growth performance. The can be the result of a difference feed intake, nutritional deficiency, an inflammatory response to infection or combinations these aspects. In this study, it was investigated whether feeding ragworm would alleviate stimulate growth. Sole were one three diets: feed, treated extract chopped ragworm. By comparing groups, hypotheses tested: (1) alleviates positively affectS sole's...

To explore the potential use of seaweed co-products for broiler diets, this study investigates whether an enzyme treatment improves performance, in vivo digestibility and health broilers. In total, 360 Ross 308 male broilers were fed one 5 experimental diets: a basal diet, or diet including U. laetevirens S. chordalis co-product, with without proteolytic seaweed, using 6 replicate pens 12 birds each. The starter (d 0-13) grower 14-21) contained 10% (w/w) product, respectively. A general...

This study compared three different fish species, striped catfish (Pangasius hypophthalmus), African (Clarias gariepinus) and snakehead (Channa striata), regarding the effect of dietary macronutrient composition on: 1. fillet yield chemical composition; 2. location fat deposition within body (fillet, liver, viscera or rest fraction). The selected species were studied for development net energy formulas, in studies. design these studies especially diet formulation similar. Diets formulated...