Journal of Environmental Biology

Enrichment of freshwater zooplankton Moina micrura with probiotics isolated from microalgae 

N.A. Samat³, F.Md. Yusoff^1,2, C.M. Chong^1,3 and M. Karim^1,2* ^?

¹Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia

²Laboratory of Sustainable Aquaculture, International Institute of Aquaculture and Aquatic Studies, Universiti Putra Malaysia, 70150 Port Dickson, Negeri Sembilan, Malaysia

³Laboratory of Marine Biotechnology, Institute of Biosciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia

*Corresponding Author Email : murnimarlina@upm.edu.my

Paper received: 18.09.2019 ?????? ???????????????????????????????????????Revised received: 25.10.2019 ???????????? ?????????????????????????Accepted: 14.08.2020

Abstract

Aim: The present study investigated the ability of probionts to enrich freshwater zooplankton, Moina micrura based on population density, population growth rate and mean body size increment.

Methodology: Different concentrations of probionts were introduced to one-day-old female Moina in filter-sterilized freshwater pond water. Addition to probiont, Chlorella sp. was added in culture media as a food source.

Results: Population density, population growth rates and increase in mean body size of Moina were observed and recorded to evaluate the ability of probiont to enrich Moina. All four probionts were able to enrich Moina in treatment PC 1 (10⁴ CFU ml^-1) and PC 2 (10⁶ CFU ml^-1) at a better rate compared to the control group (no probiont). Also, the specific population growth rate (?) and mean body size of Moina in treatment PC 1 and PC 2 were significantly higher than in treatment PC 3 (10⁸ CFU ml^-1) and control for all probionts.

Interpretation: All probionts were able to enrich Moina and increased their growth at lower concentrations (PC 1 and PC 2). Supplementation of probiont at high concent-ration was unnecessary.?

Key words : Moina micrura, Pathogens, Probiont,? zooplankton ??

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