According to the invention, it was found that, surprisingly, a feedstuff having a very high abrasion resistance and very high water stability can be obtained when a PUFA-containing biomass having a high sulphate content is used for producing the feedstuff.

According to the invention, it has been found that a particulate biomass containing an oxidation-sensitive material of value can be converted into a particularly easy-to-handle product in a gentle manner if it is subjected to a granulation with the addition of an agglomeration auxiliary.

According to the invention, it was found that culturing of PUFA-producing cells in a content of sulphate makes it possible to obtain a biomass having high cell stability and thus PUFAs protected against oxidation in a sustained manner, which biomass can in addition be advantageously further processed into a feedstuff.

According to the invention, it was found that culturing of PUFA-producing cells in a content of sulphate makes it possible to obtain a biomass having high cell stability and thus PUFAs protected against oxidation in a sustained manner, which biomass can in addition be advantageously further processed into a feedstuff.

To provide a production technique for an edible egg that contains a sufficient amount of ergothioneine by using the biological accumulation of the ergothioneine in eggs, and that has antioxidative activity. This ergothioneine-containing egg is obtained from a hen raised by being fed a hen feed for a prescribed time period, the hen feed being manufactured by manufacturing the ergothioneine-containing extract solution from a waste medium used in the production of edible mushrooms and mixing a prescribed amount of the extract solution into a feed for the hen used generally.

To provide a production technique for an edible egg that contains a sufficient amount of ergothioneine by using the biological accumulation of the ergothioneine in eggs, and that has antioxidative activity. This ergothioneine-containing egg is obtained from a hen raised by being fed a hen feed for a prescribed time period, the hen feed being manufactured by manufacturing the ergothioneine-containing extract solution from a waste medium used in the production of edible mushrooms and mixing a prescribed amount of the extract solution into a feed for the hen used generally.

According to the invention, it was found that a feedstuff containing an Aurantiochytrium biomass brings about a significant increase in growth in fish.

According to the invention, it was found that a feedstuff containing an Aurantiochytrium biomass brings about a significant increase in growth in fish.

Granulated pineapple leaves and stalks dried to correspond to a predetermined fermentation condition are fermented in an anaerobic bacteria fermentative environment in a predetermined room temperature with 15% or more and less than 50% moisture content, or 20 to 40% moisture content maintained therein, to form a pineapple-based feed or pet food ingredient of dryness and low-fermentation condition.

Granulated pineapple leaves and stalks dried to correspond to a predetermined fermentation condition are fermented in an anaerobic bacteria fermentative environment in a predetermined room temperature with 15% or more and less than 50% moisture content, or 20 to 40% moisture content maintained therein, to form a pineapple-based feed or pet food ingredient of dryness and low-fermentation condition.