Feasibility of planctomycetes as a nutritional or supplementary food source for<i>Daphnia</i>spp

Antunes, Sara C.; Almeida, Rafaela; Carvalho, Thiago Augusto Cavalcante de; Lage, Olga Maria

doi:10.1051/limn/2016019

Cited by 10 publications

(3 citation statements)

References 61 publications

(69 reference statements)

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“…D. magna is a selective filter feeder organism that feeds on unicellular algae and various organic detritus. The organism becomes a food source for the next trophic level in the aquatic ecosystems because it is naturally essential for fish larvae (Antunes et al, 2016). However, this food chain also leads to the biomagnification of pesticides.…”

Section: Introductionmentioning

confidence: 99%

Individual and Combined Effects of Pesticides with Active Ingredients of Mancozeb and Methomyl on the DNA Damage of Daphnia magna (Straus, 1820; Cladocera, Daphniidae)

Izdihar,

Perdana,

Alwaini

et al. 2023

Environ. Nat. Resour. J.

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Mancozeb and methomyl are active ingredients commonly contained in pesticides applied in shallot farming. Surface runoff can carry pesticide residues that enter water bodies and affect non-target organisms, such as Daphnia magna. This study evaluated the genotoxicity effects of individual and combined mancozeb and methomyl on the DNA damage of D. magna. Organisms at 24 h old and 48 h old were exposed to individual and combined concentrations of mancozeb and methomyl for 24 h to obtain the LC50-24 h values. These values were used to evaluate DNA damage by calculating the tail intensity (TI) (%), tail moment (TM), and tail factor (TF). Results showed that based on the LC50-24 h values, methomyl has the highest toxicity level, followed by the mancozeb:methomyl combination, and then mancozeb. The combination index of mancozeb:methomyl for both D. magna ages (24 h and 48 h) indicated that the two pesticides antagonistically interact (CI>1). However, based on TI%, TM, and TF values, the level of damage was almost the same between the individual and combined pesticide concentrations, and the DNA damage was more massive with increased pesticide concentration. The DNA damage of 24 h old and 48 h old D. magna did not significantly differ. Increased DNA damage in D. magna indicated that this parameter was sensitive to the presence of pesticides. In application, DNA damage can be used as a biomarker for biomonitoring pesticide pollution in the aquatic ecosystem.

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Section: Introductionmentioning

confidence: 99%

Individual and Combined Effects of Pesticides with Active Ingredients of Mancozeb and Methomyl on the DNA Damage of Daphnia magna (Straus, 1820; Cladocera, Daphniidae)

Izdihar,

Perdana,

Alwaini

et al. 2023

Environ. Nat. Resour. J.

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“…since they are non-selective filters. Previous studies conducted by Antunes et al [33] and Marinho et al [34,35] already showed the potential of Planctomycetes, namely Rhodopirellula rubra, to be a good supplementary food source when used in association with the standard food source (the microalgae Raphidocelis subcapitata), and its capacity to improve Daphnia magna life history parameters and in providing pink coloration. The authors also observed that these effects of R. rubra were more relevant at the exponential growth phase than the stationary growth phase.…”

Section: Introductionmentioning

confidence: 99%

Does a Diet Rich in the Bacterium Rhodopirellula rubra Improve Daphnia magna Performance?

Marinho¹,

Jesus²,

Spencer³

et al. 2022

Front. Biosci. (Elite Ed)

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Background: In the wild various organisms contribute to daphnids diet. This study, intendeds to evaluate the potential of the concentration of Rhodopirellula rubra as a single or supplementary food source for Daphnia magna. Methods: Feeding assays were performed according to standard guidelines for chronic assays (21 days), and life-history parameters and several biomarkers (protein content, oxidative stress, energetic reserves and pigments) were measured. Five food regimens were conducted with 20 individual replicates (A -R. subcapitata; 0.2 -suspension of R. rubra at 0.2 arbitrary units (AU); 0.4 -suspension of R. rubra at 0.4 AU; 0.2+A -suspension of R. rubra at 0.2+alga; 0.2+A-suspension of R. rubra at 0.4 AU + alga). Additionally, the effects of three diets (A, 0.2, and 0.2+A) on the longevity of D. magna were assessed. Results: The five diets showed a different C, N, and carotenoids composition, with an increase in the mixed diets. The results confirmed that the mixed diets improved D. magna life-history parameters. A decrease in glycogen, and the increase of haemoglobin, protein, and gluthione-S-transferase (GST) were observed. Furthermore, D. magna fed with bacterial single diets, presented worsen life history parameters and a decrease in the protein content. An induction of oxidative stress response (increased catalase and GST), and a significant decrease in lipid peroxidation and an accumulation of glycogen and carotenoids were observed. Overall, an increase in the amount of R. rubra provided to D. magna, from 0.2 AU to 0.4 AU, negatively impacted daphnid performance. No significant effects on Daphnia longevity (a 110-day assay) were observed among the three diets tested. However, a significant survival percentage and fertility (cumulative offspring is more than twice) was observed when D. magna was fed with the mixed diet. Conclusions: Results demonstrated that different diets provided a nutritional diversified food to the daphnids that induced differences in D. magna performance. The mixed diets proved to be beneficial (with increase in offspring) on D. magna performance, independently of the bacterial concentration tested. When in single diet, bacterial concentration is not nutritionally sufficient to raise D. magna even when in increased concentration.

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“…2,3 This food regime is already discussed as nutritional scarce for a good performance of Daphnia spp. [1][2][3][4][5] In laboratory experiments is essential to guarantee that Daphnia (standard organism) are in excellent conditions in order to respond only to the stress which are in study. So increase the diversity of food sources and nutritional quality is a concern for researchers to assure that Daphnia are in the greatest food and reproductive conditions life-history.…”

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confidence: 99%

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2018

JAMB

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suspended particles such as algae, bacteria, ciliates, and flagellates as well as detritus and particulate organic matter. 1 However, when Daphnia spp. reared in laboratory, they are generally fed exclusively on microalgae, a single food and carbon source. 2,3 This food regime is already discussed as nutritional scarce for a good performance of Daphnia spp. [1][2][3][4][5] In laboratory experiments is essential to guarantee that Daphnia (standard organism) are in excellent conditions in order to respond only to the stress which are in study. So increase the diversity of food sources and nutritional quality is a concern for researchers to assure that Daphnia are in the greatest food and reproductive conditions life-history.

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Feasibility of planctomycetes as a nutritional or supplementary food source forDaphniaspp

Cited by 10 publications

References 61 publications

Individual and Combined Effects of Pesticides with Active Ingredients of Mancozeb and Methomyl on the DNA Damage of Daphnia magna (Straus, 1820; Cladocera, Daphniidae)

Individual and Combined Effects of Pesticides with Active Ingredients of Mancozeb and Methomyl on the DNA Damage of Daphnia magna (Straus, 1820; Cladocera, Daphniidae)

Does a Diet Rich in the Bacterium Rhodopirellula rubra Improve Daphnia magna Performance?

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