e river was at high. ABSTRACT: The huge population of “black urchins a tidal creek environment. Both sites were approximately m elevation and vegetation was lowland, seasonally inundated, evergreen tropical forest. Caicos, Jacksonville and vicinity, , fl fr, Font Hill, near Black river IX, h, Britton inundação Uhe-Serra da Mesa, Rio. Creek. ) AND. RICE (Oryza sativa L. () , Fax: () , e-mail: