0.05% when the quantity of red shrimp landed increases by 1%. The daily effects show that prices on Tuesdays and Wednesdays are similar (not statistically different).While compared to Tuesdays,red shrimp prices increases by 4% on Mondays,9% on Thursdays
and 14% on Fridays(as can be seen in Fig. 3). Red shrimp prices show an important seasonality,being red shrimp prices from June to December more than 15 higher than March prices,achieving 40% in December(Fig. 4).