Grass Spider Observation Report

All five spiders, after being caffeinated, created a new web that was unlike the standard of their species and was not structurally strong. The spiders with the biggest changes were the second grass spider in table 1 and the common house spider in table 4. Both these spiders completely changed shape, for the grass spider it went from a funnel to only a few threads, and the webs were also changed in thickness, both having webs full of holes after being drugged. These patterns were still found in all the spiders. I did not see any clear differences that can be noted in regards to gender of the spiders. Between species there were some differences in agitation as the grass spiders in table 1 were actually less aggressive after consuming the caffeine while the orchard web weaver in table 3 and the common house spider in table 4 had an increase in movement and ran against the cotton swab. The yellow sac spider in table 2

All of the webs in table 5 followed the trend of decreasing when recreating their webs under the influence of caffeine. Figure 3 shows how drastic the changes are when the spiders are caffeinated, and spider #1 even had a decrease of its diameter by 36.32%. In table 6, the spiders were tested to rebuild its web without the interference of caffeine to show if their really was the relation between web size and caffeine. Table 6 shows how on average the web size still did decrease, but it is far less of decrease than when the spiders are drugged being only -3.52%. Spider #6 even had an increase of web size having its web diameter go from 18.6 to 19.2 centimeters resulting of a percent increase of 3.22%. In figure 4 it can be seen just how close the web sizes which could show how spiders normally do make webs of similar sizes and caffeine was the cause in the drastic web