**10. Acknowledgment**

The authors express their gratitude to the professor Martha Olivera for her constant support on the consecution of the equipment needed to develop this project, as well as to the zootechnician Luis Fernando Zuluaga that assisted with the translation of the document.

#### **11. References**


dynamic population of *Daphnia magna* together with the reproduction net rate and generation time, proper parameters of biological harvests with continue growth like

Although the collection of common productive variables cited in books was made, it is sufficient to evaluate some of them, for example: maximum density, growth rate and duplication time. Regarding the reproductive variables, the number of eggs per female and the age on the first offspring, reflected this performance. Also the productivity index P/B is important to calculate, because this index reflects the turnover rate of the harvest, and allow

The maintenance of each individual isolated avoid intra-specific and inter-specific competency for food, guaranteeing the wellness of the organisms, the best use of metabolic

From the previous work we can say that yeast is a key nutrient in 30 ppm concentrations over the maximum density and the final weight, not considering the addition of enriched media, this last one did not present a significant relation (p<0.05). Additionally, the parameters growth rate, duplication time and performance, are highly affected by the enrichment nutrient. This let us make sure that one of this ingredients yeast or potato was

It is important to design a diet with the enrichment media used on this research (soy oatmeal), keep in mind not selecting nutrients such as potato and yeast at the same time,

Finally *Daphnia magna* can be considered a specie with reproductive potential, because of it easy management and resistant to manipulation, even under stress conditions, this can be

A study of pathogenicity should be made on species that uses probiotics, as well as life food.

The authors express their gratitude to the professor Martha Olivera for her constant support on the consecution of the equipment needed to develop this project, as well as to the zootechnician Luis Fernando Zuluaga that assisted with the translation of the

Abdel-Tawwab Mohsen, Ahmad Mohammad, Khattab Yassir, Shalaby Adel. (2010). Effect of

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dietary protein level, initial body weight, and their interaction on the growth, feed utilization, and physiological alterations of Nile tilapia, Oreochromis niloticus (L).

and Water Environment Federation (WEF). (2002). *Standard Methods for the* 

because they present the same effect in the valuation on the adult population.

Daphnia magna.

added unnecessary.

**10. Acknowledgment** 

document.

**11. References** 

it to predict the productivity during a period of time.

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