Three experimental diets were formulated to contain 33 g kg−1 seaweed meals, made of wild brown algae (kelps) Macrocystis pyrifera (MAC) and Ascophyllum nodosum (ASC) or a cultivated green alga Ulva clathrata (ULVA). The fed juvenile white shrimp Litopenaeus vannamei (1.6 g) for 28 days. Loss dry matter (LDM) loss protein (LP) after 1 hour immersion in seawater, distilled water absorption (WA) analyzed the pelleted diets, as well weight gain, feed intake, conversion ratio (FCR), survival,...

Emerging contaminants (ECs) are not monitored nor regulated consistently, but may have negative effects on human health and ecosystem balance. Although pharmaceuticals personal care products among the main ECs found in surface wastewater, their toxicity fate currently sufficiently studied. In this study, we analyzed for first time a group of 46 secondary effluent wastewater treatment plants (WWTP) Prague. Thirty-seven compounds were identified discharge to water. Three had no toxicology...

Emerging contaminants such as sunscreens, hair dyes and flame retardants have been found at important concentrations in surface water (river, lake, ocean), but their negative impact on different aquatic species is not fully known. This study evaluated the effect of benzophenone (BZ), 2,5-diaminotoluene sulfate (PTD), p-phenylenediamine (PPD) tetrabromobisphenol A (TBPA) survival (LC50) sublethal (LC25) activity enzymes linked to stress oxidative process brine shrimp under two temperature...

Numerous methods to analyze biogenic amines in biological materials have been described. A versatile and rapid methodology these compounds feedstuffs, complete feeds, animal tissues, however, has not reported. The current method was developed address this need. Biogenic tissues were extracted with 10% trichloroacetic acid, reacted O-phthaladehyde using high-performance liquid chromatographic employing a cation exchange column. Detection limits 50 pmol/mL for tyramine, histamine, putrescine,...

This study examines acute hepatopancreatic necrosis disease (AHPND) in shrimp farming, caused by specific strains of Vibrio (Vp AHPND+), and evaluates the potential silver chloride nanoparticles (Ag/AgCl NP) synthesised from marine resources as an antibacterial additive feed. Penaeus vannamei juveniles were fed diets supplemented with 0, 10, 100, 1000 mg Ag/AgCl per kg for 20 d. The highest weight gain (%WG) was observed individuals consuming 100 Ag kg-1 diet, a 104.27 ± 4.11% increase....

Two feeding trials were carried out to evaluate the effect of diets containing corn or peanut grains naturally contaminated with aflatoxins on growth, feed intake, survival, and histological response white shrimp Litopenaeus vannamei. In trial 1, four experimental formulated contain 0, 500, 1000, 2000 µg kg–1 total (TA) fed L. vannamei juveniles for 28 days. 2, six 10, 20, 40, 60, 120 TA 64 Feed intake weight gain significantly affected by presence from grains. conversion rate increased a...

In search of pharmaceutically active products to control type 2 diabetes, five brown seaweeds (Silvetia compressa, Cystoseira osmundacea, Ecklonia arborea, Pterygophora californica, and Egregia menziesii) from the Northwest Mexican Pacific coast were investigated. Proximate composition total polyphenol content (TPC) as phloroglucinol equivalents (PGE) determined for seaweed powders their respective hydroethanolic (1 : 1) extracts. Extracts screened radical scavenging activity (DPPH ORAC)...

In order to become a more profitable and sustainable industry, the aquaculture sector is constantly exploring alternative nutrient sources. present study, natural stable isotope signatures of different animal-, plant- microbial-derived ingredients were determined evaluate assimilation dietary nitrogen in Pacific white shrimp. Experimental diets manufactured replace fish meal squid with microbial- derived (48 66 % inclusion) also used as additives (4%). Ingredients study their effects on...

The safety and effectiveness of four aluminosilicate-based products (Novasil Plus, Zeolex Extra, Mycofix Select, Fixat) were tested for 42 days on juvenile Pacific white shrimp, Litopenaeus vannamei, fed diets containing corn grains that had been previously inoculated with Aspergillus parasiticus then sterilized. Two control diets, one uncontaminated another contaminated the grain, elaborated to contain a final concentration 0 75 μg kg–1 total aflatoxins. Both formulated 38% crude protein 8%...

Tetrabromobisphenol (TBBPA), a flame retardant compound, is considered ubiquitous pollutant, with potential impact on the environment and human health. Several technologies have been applied to accelerate its degradation minimize environmental impacts. Due aromaticity character, peroxidase enzymes may be employed carry out transformation in mild conditions. Therefore, purpose of this work was determine capacity enzyme chloroperoxidase (CPO) oxidize TBBPA several water samples.The oxidation...

Apparent digestibility coefficients (ADC) of dry matter, crude protein (CP), and amino acids (AA) were evaluated in diets with six rendered by-products used to feed juvenile Pacific white shrimp: two poultry meals (poultry meal 1, 69% CP; 2, 72% CP), feather (89% one blood (96% pork (57% CP). Experimental formulated 30% the test ingredient 70% a commercial diet supplemented 1% chromium oxide as inert marker. AA contents ingredients, diets, leached feces determined by high performance liquid...

Aflatoxicosis is a growing problem in aquaculture. A 42-day study was designed to evaluate the efficacy of conjugated linoleic acid (CLA) and curcumin (CUR) protect juvenile Pacific white shrimp (Litopenaeus vannamei) from aflatoxins. Growth parameters along with alkaline phosphatase (ALP) glutathione S-transferase (GST) activities were measured. Shrimps (36) an average weight 76 ± 0.9 mg randomly allocated eight experimental groups. Non-contaminated diet (NCD) aflatoxin-contaminated (ACD)...

Rainbow trout has a limited ability to utilize digestible carbohydrates efficiently. Trout feeds generally contain high levels of DHA, fatty acid known inhibit number glycolytic and lipogenic enzymes in animals. A study was conducted determine whether carbohydrate utilization by rainbow might be affected dietary DHA level. Two low-carbohydrate (<4 % carbohydrate) basal diets were formulated 1 (adequate) or 4 (excess) g/100 g diet respectively. The two diluted with increasing starch (0 %, 10...