Fig. 2From: Population structure, growth and production of Thoracophelia furcifera (Polychaeta: Opheliidae) on a sandy beach in Southern BrazilFortnightly variation in density (open circle) and biomass (open box) (mean ± SE) of the T. furcifera population at Barra da Lagoa Beach, southern Brazil, from May 2008 to April 2009: “I” refers to the first fortnight of the month, and “II” to the second oneBack to article page