Results

The first graph shows the distribution of three size groups in September, in November and then both months. The results were categorized into three size based groups (4-11 mm , 11-18 mm, and 18-26 mm) and are plotted to show their proportional frequency. The different colors indicate the different zones for the two days.	Figure 1.1
Figure 1.2	Figure 1.3

Mean Size

Zone	Day	Mean Size (mm)
Low	1	11.49424242
Middle	1	11.8643956
High	1	15.71
Low	2	12.413
Middle	2	13.87310345
High	2	11.92771429

    Table 1.1 This table compares the mean size of all L. littorea found in each zone for each day
    from the two months..

		One tailed distribution t-tests 2 sample with unequal variance
day 1 vs day 2*	low 1 mid 1	low 1 vs high 1*	mid 1 vs high 1*	low 2 vs mid 2	low 2 vs high 2	mid 2 vs high 2*
0.044642842	0.243877954	0.016906763	0.022696297	0.060931492	0.301136702	0.04123867

Table 1.2 This is a t-test comparing the outcomes for all zones from day 1 (September) and day 2 (November). Each day is a separate sample.
These are p-value results of one tailed distribution t-tests 2 sample with unequal variance. These tests compare the means from both days for the low, middle, and high zones. Each test compares two zones, and zones are separate samples with respect to the day of sampling. Asterisks (*) mark differences that are significant (p < .05).

Anova: Single Factor

SUMMARY
Groups	Count	Sum	Average	Variance
low 1	3	66	22	273
mid 1	3	93	31	433
high 1	3	5	1.666667	4.333333
low 2	3	60	20	208
mid 2	3	30	10	31
high 2	3	35	11.66667	46.33333


ANOVA
Source of Variation	SS	df	MS	F	P-value	F crit
Between Groups	1611.611	5	322.3222	1.94235	0.160554	3.105875
Within Groups	1991.333	12	165.9444

Total	3602.944	17

Table 1.3. These are the results of a single factor ANOVA that compares the means from the three size distribution categories. This
compares all three zones from the September and November samples. To see the samples separately click here for September and
here for November.

Anova: Single Factor

SUMMARY
Groups	Count	Sum	Average	Variance
low 1	22	66	3	12.47619
mid 1	22	93	4.227273	20.75541
high 1	22	5	0.227273	0.374459
low 2	22	60	2.727273	7.82684
mid 2	22	29	1.318182	1.655844
high 2	22	35	1.590909	4.062771


ANOVA
Source of Variation	SS	df	MS	F	P-value	F crit
Between Groups	221.4545	5	44.29091	5.63599	0.000101*	2.286184
Within Groups	990.1818	126	7.858586

Total	1211.636	131

Table 1.4. These are the results from a one-way ANOVA comparing the number of snails in broad 1mm size groups in the three zones from the September and November samples. Asterisks (*) mark differences that are significant (p < .05).To see the samples separately click here for September and here for November.

DAY 1 RESULTS