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. 2011 Apr 10;9:2. doi: 10.1186/1740-3391-9-2

Table 2.

Relationship between light and activity

species r2 p type trend
D. polychroa 0.005 0.87 lin -
D. tigrina 0.653 <0.01 log -
P. tenuis 0.0003 0.97 lin +

Correlations between diel light irradiance and planarian activity, using the values reported in Figure 1 (n = 8 and df = 6 for each correlation). Best fitting correlations are reported for each species; lin = linear and log = logarithmic relationships; positive and negative trends are reported as "+" and "-", respectively.