Artemia Franciscana and Preference Regarding the Effects of Light, Temperature, and pH.

1236 Words Jul 14th, 2018 5 Pages
Introduction

The Artemia franciscana can survive in extreme conditions of salinity, water depth, and temperature (Biology 108 laboratory manual, 2010), but do A. franciscana prefer these conditions or do they simply cope with their surroundings? This experiment explored the extent of the A. franciscanas preference towards three major stimuli: light, temperature, and acidity. A. franciscana are able to endure extreme temperature ranges from 6 ̊ C to 40 ̊ C, however since their optimal temperature for breeding is about room temperature it can be inferred that the A. franciscana will prefer this over other temperatures (Al Dhaheri and Drew, 2003). This is much the same in regards to acidity as Artemia franciscana, in general thrive in
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Discussion
Referring to the experiment`s hypotheses that the A. franciscana prefers light, temperatures between 20-24 ̊ C, and a basic (pH 8) environment; the results regarding the first treatment, light, were initially vague. According to the experiment results, the A. franciscana did not show a clear preference towards light or dark because both sections contained high concentrations of them; the A. franciscana also strayed from the uncovered section. Several factors may shed light on the results such as the A. franciscanas physical appearance; they possess three light-sensitive eyes that can adjust to both low and high light intensities (Fox, 2001). This means that although they may prefer light they can survive in darker habitats as well; relating back to the experiment the A. franciscana may have been content with wherever they were, resulting in limited movement.
For the temperature treatment, it was decisive in that the A. franciscana showed a steady increase in concentration from section 1 to 4. This expands on the hypothesis that suggests A. franciscana prefers an optimum temperature between 20-24 ̊ C because from the results of the experiment A. franciscana seemed to prefer even higher temperatures. Al Dhaheri and Drew (2003) state that A. franciscana stop reproducing at temperature above 30 ̊ C and compared to the experiments results. It can be concluded that A. franciscana prefer warmer temperatures, but reproduce at lower
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