Dinâmica de produção de peixe ornamental do alto e médio rio Negro

Abstract

This study aimed to analyze the changes in the production of ornamental fish in the area of Barcelos, primary fish trade place of the high and middle Rio Negro. For this, a survey of ornamental fish´s shipments in the local port was madden, through a review of the permanent production and local exportation records of the Piaba Project over the past decade. The predominant species at local ornamental fisheries was the Cardinal Tetra (Paracheirodon axelrodi), it contributed with 86% during the studied time. The rest of species locally called as “variedade” contributed with 14%, and it´s production remained relatively stable along the years. The most abundant species of the “variedade” group were: Hemigrammus bleheri (23.7%), Paracheirodon simulans (22%), Hyphessobrycon sp. "rosaceu" (8.9%l), Carnegiella spp. (7.4%), Carnegiella marthae (4.4%), Apistogramma spp. (4.1), Petitella georgiae (4%), Nannostomus eques (3.9%), Dicrossus filamentosus (2.5%), Hyphessobrycon socolofi (1.7%), Nannostomus marginatus (1.4%), Ancistrus cf. dolichopterus (1.4%), Nannostomus trifasciatus (1.4%), Hyphessobrycon copelandi (1.3%), Osteoglossum ferreirai (1.2%) and Hyphessobrycon erythrostigma (1%). Evidence was found about the hydrological cycle influenced the Monthly Total Production values and its composition, modifying the abundance of families. The influence was not decisive for all the years production, it suggests that in some years other unmeasured factors like trading factors could influenced the production in a bigger way.