this study was carried out to evaluate the effect of commercial live bakery’s’ yeast( saccharomyces cerevisiae ), (marketed as amax), on growth and survival of persian sturgeon( acipenser persicus) larvae (74.9 ± 9.7mg) during 30 days. sturgeon larvae were fed on daphnia magna enriched at three suspensions of yeast, amax, (0, 50, 100, and 150 mg yeast per litter). the feeding level was 30 perce...

Freshwater zooplankton is increasingly used to study effects of dispersal on community and metacommunity structure. Yet, it remains unclear how zooplankton disperses. Clearly, birds and wind play a significant role as zooplankton dispersal agents, but they may not always be the main vectors. This experimental study shows that a cosmopolitan aquatic insect, Notonecta, can be an important vector ...

One of the most important aims of aquatic hatcheries is availability to mass produce of Daphnia magna as a live food with high nutritional value in the shortest time. In the present study, D. magna fed with two freshwater green algae species, Chlorella sp. and Scenedesmus obliquus, enriched with different dosages of a mixture B group vitamins (0, 0.5, 1 and 2 ml.l) were compared at two stages (...

This research aimed to know the effect of quail manure on an abundance Daphnia magna. The method for D. magna was a Completely Randomized Design (CRD) with four settings, each repeated times, namely use P0 (Control without fertilizer), P1 (Quail fertilize 1 g/L), P2 3 P3 5 g/L). cultured 15 days in container volume liters. updated parameters were magna, mortality and water quality. results anal...

Activity of lactate dehydrogenase (LDH) was used as an effect criterion in toxicity tests with Daphnia magna. In the first part of the work, the conditions for the use of LDH activity in toxicity tests with juveniles and adults of D. magna, were optimized. The influence of parameters such as the number of animals per sample, nutritional status, age and the presence of eggs in the brood chamber ...

Adaptive evolution can occur over similar timescales as ecological processes such as community assembly, but its particular effects on community assembly and structure and their magnitude are poorly understood. In experimental evolution trials, Daphnia magna were exposed to varying environments (presence and absence of fish and artificial macrophytes) for 2 months. Then, in a common gardening e...

Alcoholic beverage is any fermented liquor such as wine, beer, or distilled spirit that contains ethyl alcohol or ethanol as intoxicating agent. Daphnia ( Daphnia magna) or water flea is a planktonic crustacean commonly found in canals and other waterways. It has been used as a standard organism for toxicity testing and toxicological reaction to environmental pollutants. The study is concerned ...

The use of in vitro (fish cell lines) is a cost-effective, very rapid, and informative tool for toxicological assessments. Using the neutral red (NR) assay, we compared acute toxicity (20hEC50) twenty-six chemical substances on rainbow trout gonad line (RTG-2) with their vivo to Barbados Millions Poecilia reticulata (48hLC50, OECD 203) crustacean Daphnia magna (48hEC50, 202). 20hEC50 values obt...