Fig. 3.
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Population distribution and sex ratio of the crab Sylviocarcinus pictus (H. Milne-Edwards 1853) at Guaribas river, semi-arid region of Brazil. A, observed population distribution of all crabs collected in this study; B, Sex ratio (estimate ± SE) during the months sampled and size-frequency distribution of body size (CW) in males and females. The black square indicates a deviation from a 1:1 sex ratio.
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