Aller Aqua ups the energy level in fry feed
Danish feed producer Aller Aqua is to re-launch its Futura EX GR feed for early life-stage rainbow trout and other salmonids later this month after trials at its German research centre showed benefits of a higher-energy composition.
A series of trials at the Buesum facility showed significantly higher growth, lower feed conversion ratio and improved nutrient retention in fry of rainbow trout when fed a more energy-rich feed, said Aller Aqua Research product manager Robert Tillner.
Consequently, the company will re-launch Futura EX GR with a higher fat and energy content.
The re-launch is part of a wider launch of new fry feeds on August 27 at the AQUA 2018 event in Montpellier, France.
These include Thalassa EX GR, more suited to larvae and fry of marine species as well as species with lesser energy requirements.
The company will also be introducing a new premium starter diet for fish larvae and early fry, which includes high levels of krill meal, and particle sizes down to 0.1mm.
Tillner said: “The larvae of many fish species are not fully developed at the time they start feeding, some lack a fully developed stomach with the complete range in digestive enzymes, and the digestion of feed particles as well as the nutrient uptake is of highest importance to match the high potential for growth.”
He said that to aid the developing fish in their digestive processes and organ development, the new products were naturally enhanced to support organ development and health of the liver and the gallbladder, leading to an enhanced secretion of digestive enzymes and improved nutrient uptake as well as improved growth and health of larvae and fry.