Effect of different feeds on reproduction performance, nutritional components and fatty acid composition of cladocer water flea ( Daphnia magna )

Abstract

This research evaluated the growth, survival, proximate and fatty acid composition of water flea (Daphnia magna) fed baker's yeast (BY) and three types of microalgae diets. In this study, two freshwater microalgae; Botrycoccus braunii (BB) and Chlorella vulgaris (CV), one marine spray‐dried microalgae, Nannochloropsis oculata (SDN), and baker's yeast were evaluated for herbivorous zooplankton Daphnia magna. Survival, reproduction and population density of Daphnia magna have been studied. Daphnia reproduction was enhanced by utilization of baker's yeast diet with increasing egg number, juvenile and adult female numbers among treatments during the experimental period. Daphnia fed SDN diet increased egg number only 7th day of experiment. Population density and survival was positively affected by utilization of baker's yeast at the end of the experiment. Protein levels enhanced by SDN diets while Daphnia fed Botrycoccus braunii diet showed the highest lipid and EPA content in Daphnia. Overall, each diet improved different part of nutrients in Daphnia biomass.

Effect of Polystyrene Microplastics in Different Diet Combinations on Survival, Growth and Reproduction Rates of the Water Flea (Daphnia magna)

“…Daphnia belong to the herbivorous zooplankton that feed through filtering a variety of particles suspended in the water column [35]. Therefore, this species is generally unable to distinguish MPs from natural food items when offered together [34].…”

Effect of microalgal based diets on growth, proximate, fatty acid and amino acid composition of water flea (Daphnia magna)

“…In daphnia nutrition, studies are mostly related to utilization of freshwater microalgae because of the their natural feeds, however, marine microalgae species are also promising for Daphnia species. For instance, spray-dried Nannochloropsis oculata enhanced protein levels and egg number of Daphnia individuals (Turcihan et al, 2022). Despite the fresh algae, commercial microalgal diets have not been evaluated for daphnia nutrition.…”

“…Daphnia is not able to convert 18C fatty acids to longer chain fatty acids (Taipale et al, 2011). Turcihan et al (2022) studied different algae diets which are Botrycoccus braunii, Chlorella vulgaris and spray-dried Nannochloropsis oculata comparing to Baker's yeast diet. In spite of Baker's yeast had good performance in reproduction, this diet did not support fatty acids in Daphnia.…”

“…Water ea (Daphnia magna) is one of the most diverse live prey in the freshwater ecosystem. It is highly important cladoceran for aquaculture (Turcihan et al, 2022), ecology (Stolleerk, 2010), physiology (Boyd et al, 2021), nanotechnology (Politowski et al, 2021), eco-toxicology (Jansen et al, 2011) and evolutionary biology studies (Campos et al, 2018). They are also used in wastewater treatments to convert organic waste into valuable live prey via cultured microalgae biomass (Kocbas and Oral, 2015;Shiny et al, 2005;Stevčić et al, 2020).…”

“…In order to obtain high biomass success and nutritional boost on daphnia, it is still being looking for alternative diets. Recently, Turcihan et al (2022) mentioned that importance of fatty acids on daphnia feeding and they refered to lack of knowledge about amino acid compositions of these live preys. In this study, two fresh microalgae (Euglena gracilis and Pavlova lutheri) and four microalgae products (Algome®, AlgomeGrow®, ProteinPlus® and Naturiga®) were evaluated for survival, growth, fatty acids and amino acids composition of water ea (Daphnia magna).…”