A B S T R A C TThe Litopenaeus schmitti and Farfantepenaeus paulensis shrimp captured in estuaries are marketed as live bait for recreational fishing. As an alternative to shrimp extractive activities, the authors evaluated the rearing of these species in a recirculation culture system. For each species, the grow-out study was carried out in two 120-day production cycles, using 3,300 juveniles of an average length of 25 mm and weight of 0.9 grams in each, distributed in 12 tanks of 1,500 liters and 1.32 m 2 , at a population density of 208.3 shrimp per m 2 . The growth parameters were obtained using the von Bertalanffy model based on the length (mm) and age (weeks) data. The adjustments were made in the R environment of the non-linear least-square method. The von Bertalanffy growth model showed a proper fit, with determination coefficients of 0.900 for L. schmitti and 0.841 for F. paulensis. The values of L∞ and k were 172.66 and 0.027 mm for L. schmitti and 110.13 mm and 0.050 for F. paulensis, respectively. In the current study, L. schmitti showed negative allometric growth (p=4,314x10-18) and F. paulensis isometric growth (p=0.267). The growth of shrimp obtained in the proposed recirculation system can supply live bait for the sport fishing market. R E S U M OOs camarões Litopenaeus schmitti e Farfantepenaeus paulensis capturados pela pesca artesanal nos estuários são comercializados como iscas vivas na pesca esportiva. Como alternativa à atividade extrativista foi avaliado o cultivo dessas espécies em sistema de recirculação de água. Para cada espécie foram realizados dois ciclos de produção de 120 dias, utilizando 3300 juvenis em cada um, com média de 25 mm de comprimento e 0.9 gramas em peso, dispostos em 12 tanques de 1500L e 1.32 m 2 , na densidade de 208.3 camarões m 2 . Os parâmetros de crescimento foram obtidos utilizando-se o modelo de von Bertalanffy baseado nos dados de comprimento (mm) e idade (semanas). Os ajustes foram feitos no ambiente R utilizando o método não-linear de mínimos quadrados. O modelo de von Bertalanffy apresentou ajuste adequado, com coeficientes de determinação de 0.900 para L. schmitti e 0.841 para F. paulensis. Os valores de L∞ e k foram 172.66 mm e 0.027 para L. schmitti e 110.13 mm e 0.050 para F. Paulensis, respectivamente. No presente estudo L. schmitti apresentou crescimento alométrico negativo (p=4.314x10-18) e F. paulensis crescimento isométrico (p=0.267). O crescimento obtido dos camarões no sistema de recirculação proposto atende ao mercado de iscas vivas da pesca esportiva.

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Ucides cordatus is a relevant fishery resource of Brazilian mangroves and requires legal normative to sustainable use based on stock assessment and management. This study evaluated some population parameters (structure, density, abundance, fishery potential and stock) of this crab species in Brazil Southeast (São Paulo, State), discussing the use of the results to delineate fishery management strategies. Density was monthly evaluated (September 1998 to August 1999), using five sample quadrats of 2x2 m. Density (ind.m-2) was indirectly estimated by counting the opened (with biogenic activity) and closed galleries, and contrasted with flooding level by tides using the vertical distribution of macroalgae in the base of trees. Density of U. cordatus ranges from 2 to 11 ind.m-2 (6±2 ind.m-2) and statistical difference occurred among monthly means (F=11.58; p=0.000). The relationship density vs. tidal flooding indicated a decrease of U. cordatus density in mangroves with higher levels of tidal flooding (r=-0.94; p=0.001). The total abundance of U. cordatus was estimated in 63.7 millions of crabs in 10.61 km2, with a reduction of 34.9% due to total mortality discount. Estimates like that are uncommon in literature, and could be used for fishery forecasts, allowing improvement by the introduction of new variables to be known in the future.

The concentrations of metals in tissues of Callinectes danae were evaluated, aiming to determine the bioaccumulation process of this species. Gills presented the highest mean concentrations for most metals, except for Hg (