Mean port and starboard doorspread values, 72.3 m (SE = 0.65) and 75.3 m (SE = 0.73), respectively, were not significantly different.
However, tows 14, 22, 26, and 58 were omitted from all analyses because the differences between the port and starboard doorspread values exceeded the standard deviation of the doorspread differences, 6.1 m.