ZM live paramecia
ZM live rotifer sample in beaker
Inve sparkle invert feed
a useful skill to know and may be applied to other specialist livefood cultures including copepods. The use of marine algae concentrates and prepared solutions have proved convenient and have aided the design of high-density rotifer rearing systems. The ability to coldstore concentrates and feed by peristaltic pump on a timer leads to regular feeding, a more stable culture and a major laboursaver. The development of formulated dry yeast invert feeds was the next progressive step and these can be mixed daily and fed in the same way as algae solutions. In their nature
53-micron nylon mesh strainers, smaller than the standard 120-micron used for newly hatched Artemia. For breeding projects requiring specifically small rotifers a 25-micron mesh strainer can be used to grade out the smallest individuals. When harvesting rotifers it is important to limit physical damage; for example, when using a strainer to harvest rotifers, aim to have the mesh submerged as long as possible. When siphoning a rotifer culture from one tank to another, limit the head difference so water velocity is reduced.
prepared algae solutions have a lower percent dry matter nutritional content, making it easier for the new dry diets to offer a higher contribution and cost savings. INVE Aquaculture’s latest S.parkle product is an evolution of the Culture Selco range based on deactivated yeast. As a separate development S.presso is the latest HUAF emulsion/suspension enrichment product to evolve from the Easy DHA Selco range and now has protocols for both Artemia and rotifers.
Rotifers are normally harvested with
Rotifers, like Artemia cysts, can get everywhere and cross contaminate cultures including microalgae cultures if you are not careful. Ideally rotifers and microalgae should be maintained in separate rooms and staff should thoroughly wash and dry their hands in between any maintenance work. If you wish to be ultra-careful start the day with water quality work on reservoir water stocks, follow with microalgae work, and then follow with live rotifer or copepod work with hand-washing in between each session. When working with both S-strain and L-strain rotifer cultures cross contamination may be reduced by running S-strain cultures at higher salinity and temperatures to L-strain cultures. www.zmsystems.co.uk
A powerful natural growth promoter • Antimicrobial activity • Trophic effect on intestinal epithelium
• Immunological properties: Anti-inflammatory Reinforce of the intestinal defence barrier
• Improves performance
Providing proficient tools to achieve cost-effective and sustainable aquaculture practices Head Office and Orders: Jesús Aprendiz, 19. 1º A-B 28007 Madrid · SPAIN T. +34 915 014 041 · email@example.com · www.norel.es
32 | INTERNATIONAL AQUAFEED | March-April 2015
Published on Mar 16, 2015