Monday, February 15, 2016

RESEARCH : SEAWEEDS AS ANIMAL FEED RESULTS IN EGGS AND BEEF OF BETTER QUALITY.

RESEARCH : SEAWEEDS AS ANIMAL FEED RESULTS IN EGGS AND BEEF OF BETTER QUALITY. Seaweeds can have a pre biotic effect in pig diets and improve egg quality in laying hens. However, high amounts of seaweed in the diet can have an opposite effect. The inclusion rate is therefore important. A report Published in Animal Feed Science and Technology termed : Seaweeds for livestock diets . The nutritive value of seaweeds for ruminants varies widely. It depends on the species, on the composition of the algae (protein, minerals, polysaccharides, phlorotannins) and also on the adaptation of the animal to this particular feed. RESEARCH : SEAWEEDS AS ANIMAL FEED RESULTS IN EGGS AND BEEF OF BETTER QUALITY. A study in the laboratory with rumen fluid from seaweed-fed sheep showed that organic matter digestibility of brown and red seaweeds was very high for brown algae L. digitata, S. latissima and Alaria esculenta species (94%, 97% and 81% respectively) and red algae P.palmata (81%), but was low for other brown seaweeds such as A. nodosum, Fucus serratus and Fucus vesiculosus (33%, 15% and 26% respectively. RESEARCH : SEAWEEDS AS ANIMAL FEED RESULTS IN EGGS AND BEEF OF BETTER QUALITY. In a comparison of brown algae M. pyrifera and Sargassum species, the in situ DM degradability of the former was found to be low (50%) but higher than that of the latter (29%). Crude protein of these seaweeds was found to be rumen-undegradable in situ, but the in vitro trypsic digestibility of their proteins was high, which could make brown algae a good source of protein for ruminants despite their low protein content. RESEARCH : SEAWEEDS AS ANIMAL FEED RESULTS IN EGGS AND BEEF OF BETTER QUALITY. The brown seaweed A. nodosum meal has been shown to increase growth performance in broilers. It didn't matter in which form it was included in the diet (boiled, raw or autoclaved). In another study with green seaweed Enteromorpha prolifera, it was shown that inclusion rate ranging from 2% to 4% provided the best nutrient availability and high apparent metabolisable energy in broilers. This may be attributed to a high level of amylase in the duodenum. It had a positive effect on feed intake, feed conversion ratio and average daily gain while reducing abdominal and subcutaneous fat thickness, thus improving breast meat. Brown seaweed Sargassum species from the Red Sea shore fed to laying hens during 20–30 weeks at 1–12% dietary level had no deleterious effect on body weight, egg weight, egg production, feed conversion ratio and egg quality. Sargassum dentifolium fed raw, boiled or autoclaved at levels of 3% or 6%, was beneficial to egg quality. Green seaweed E. prolifera included at 1–3% resulted in improved egg production and quality: it increased weight, shell thickness, and yolk colour and reduced cholesterol in yolk. It also resulted in a lower E. coli load in faeces, , suggesting better animal health.

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