Black background improves the population growth of euryhaline rotifer, brachionus rotundiformis reared in two photoperiod regimes
Abstract
© 2019, BIOFLUX SRL. All rights reserved. This study evaluated the population growth of rotifer, Brachionus rotundiformis (Tschugunoff, 1921) cultured in different colour backgrounds at two photoperiods under non-axenic condition. Polyethylene tetrachloride bottles of different colours were used as experimental culture units with initial stocking density of 5 rotifers mL-1. The cultures were fed daily with Chlorella sorokiniana Shihira and Krauss, 1965 at 1.0 x 106 cells mL-1 under ambient condition (28.2±0.6°C). Five colour backgrounds (red, black, white, blue, and yellow), and two photoperiod regimes (24-h illumination, and 1:1 light-dark photoperiod) were assigned as treatments; each replicated thrice and set in completely randomized design. Significant variation among colour treatments were observed (F = 7.97, df = 4, p < 0.01), with black background having the highest total mean population growth (4.32 x 105 ± 9.97 x 104) in 24-h illumination, and in 1:1 light-dark photoperiod (2.80 x 105 ± 5.30 x 104). Pooled rotifer densities of treatments cultured in 24-h illumination was higher compared to 1:1 light-dark photoperiod but not statistically significant (t = 1.26, p > 0.05). Specific growth rates were observed to be highly significantly different among treatments, with black having better specific growth rates (89-90% per day) in both photoperiods. This study demonstrated that B. rotundiformis reared in black background had better population growth performance compared to other environmental colorations, with no profound photoperiod effect.
Source or Periodical Title
AACL Bioflux
ISSN
18448143
Page
1762-1770
Document Type
Article
Subject
Bataan, Natural food, Rotifer density, Zooplankton
Recommended Citation
Manliclic, Adrian Deil C.; Consigna, Mark June S.; Rabadon, Marz Linnaeous L.; and Corpuz, Mark Nell C., "Black background improves the population growth of euryhaline rotifer, brachionus rotundiformis reared in two photoperiod regimes" (2021). Journal Article. 857.
https://www.ukdr.uplb.edu.ph/journal-articles/857
