Montmorillonite Clay Minerals With or Without Microalgae as a Feed Additive in Larval White Leg Shrimp (Litopenaeus vannamei)

Autor: Palm, Harry W.; Sörensen, H.; Knaus, U. 2015
In:

Annals of Aquaculture and Research

Bandangabe: 2
Auflage: 1
ISBN: 2379-0881
Seite: 1 - 11
Jahr: 2015

Einordung:
Institut: Professur Aquakultur und Sea-Ranching

Abstract:
Montmorillonite–illlite/muscovite mixed layer clay minerals with or without addition
of Chlorella vulgaris microalgae powder were applied as a feed additive in white leg
shrimp early stage PL 1 postlarvae (12 days post hatch), 2x Litopenaeus vannamei.
Three independent experiments were conducted in four identical recirculation systems,
each consisting of 4 aquaria with a water volume of 750 L and a flow through of
250% per hour. With a stocking density of 150 post larvae in each aquarium per 0.5
m2, representing super intensive conditions, the 2% application of the Friedland clay
mineral demonstrated a positive effect onto L. vannamei survival, final total weight gain
and partly reduced the feed conversion ratio (FCR) during three independent trials. In
contrast application of 1% clay mineral reduced the shrimp performance compared
with the control. Size distribution of shrimp was reduced for the 2% clay or the 2%
clay/2% algae treatment groups, resulting in a lower maximum weight difference
and lower standard deviation compared with the 1% clay treatment group and the
control. Taking into account the higher survival rates and the observation that weak
shrimps where directly consumed by the other animals in the aquaria, the clay mineral
feed additive might have suppressed cannibalism and resulting in a more even size
distribution and a healthier stock. The applied Chlorella vulgaris microalgae originated
from a bioreactor attached to a power station fed with CO2, making a direct use of the
microalgae products in combination with montmorillonite-illlite/muscovite mixed layer
clay minerals as a feed additive for healthy aquaculture feeds possible.

Ansprechpartner

Zur Publikation: Mitarbeiter, Projekte
Weitere Publikationen im Forschungsteilschwerpunkt