Week 5

The aquarium had less activity during the fifth observance. Though many organisms were still present and multiplying, everything seemed to be moving at a moderate pace. With the naked eye, I could observe seed shrimp and annelids or planarians. My moss had grown and more algae were present.

OBSERVATIONS::

Seed Shrimp: I did not observe many generations of seed shrimp; most were mature. Most were concentrated at the bottom of the aquarium eating, but they could be found throughout the waters. I believe some of the seed shrimp were eating not only the alga but also the vorticella. The seed shrimp still moved quickly, but not as quick as in the past weeks.

Rotifer: Absent.

Unknown 1: Not observed.

Annelida: There was a lower concentration of Annelida this week, and most of the Annelida observed were adult. They were primarily present in the bottom or on the sides of the aquarium eating.

Paramecium: Absent.

Cyclops: Absent

Unknown 4: Not observed.

Planarian: I saw many Planarians throughout the aquarium. Some were eating around the alga, moss, and possibly the vorticella. Most were moving throughout the aquarium though I did observe one which was stationary in the middle of the waters. I thought it was dead, but upon closer observation I could see its cilia and inside structures moving.

Diatom: Numerous diatoms are located throughout the aquarium. They are stationary.

Vorticella: I saw many vorticellas along the walls of the aquarium.

Unknown 5: Again I observed this organism, and it appeared to have grown since I last saw it. Unknown 5 was moving a bit slower and was eating on the moss.

CONCLUSION::

I believe that some of the population decreased since the last observation. Most of the organisms I observed were mature; I only found a few juvenile seed shrimp. But some populations like that of the diatoms and Vorticella have increased, or at least I noticed them in greater quantity during this week 5.