For lab in February, our class went to Diamond Head beach to determine the spatial patterns for Nerita picea and Littoraria pintado. We wanted to determine if the spatial patterns for these snails are clumped, uniform, or random. We started by laying a transect along the beach. Pairs of students were given a 10m section of transects. They took surveys every 0.5m on how many Nerita picea and Littoraria pintado were located in the 25cmx25cm quadrats. The data found that both Nerita picea and Littoraria pintado both had clumped spatial pattern. Nerita picea was found closer to the shoreline and the water than Littoraria pintado was. Littoraria pintado was found higher on the beach.
Next, students took temperature readings of Nerita picea located on light substrate, on dark substrate, alone, and within groups. This was done to see if body temperature varied between light and dark substrate and if being alone or in groups had an affect as well. Five individuals from dark aggregated, dark solitary, light aggregated, and light solitary were surveyed. The data was analyzed with a two-way ANOVA. The ANOVA results showed grouping did not have a statically significant impact on body temperature of Nerita picea.
This was one of the better labs that I attended because we got to go out in the field and get our hands dirty!