RESUMOO camarão-sete-barbas (Xiphopenaeus kroyeri (Heller, 1862)), pertence à superfamília Penaeoidea, família Penaeidae. Apresenta ampla distribuição geográfica no Atlântico Ocidental, ocorrendo da Carolina do Norte (EUA) ao Estado do Rio Grande do Sul. O presente estudo foi motivado pela necessidade de um melhor conhecimento da biologia e do ciclo de vida do camarão-sete-barbas na Baía de Tijucas, Tijucas, Santa Catarina. O crescimento foi avaliado, para ambos os sexos, através da estrutura das distribuições de freqüência de comprimento, utilizando o modelo de BERTALANFFY (1938), o qual foi aplicado nas amostras oriundas da frota artesanal de arrasto. As equações de crescimento obtidas foram: CC = 31 (1 -e (-0,0072 (t)) ) (fêmeas) e CC = 28 (1 -e (-0,0082 (t)) ) (machos). Os machos apresentaram menor longevidade (561 dias), maior coeficiente de crescimento (0,0082) e menor comprimento assintótico (28 mm), enquanto as fêmeas crescem mais lentamente (0,0072), vivem por um período mais longo (641 dias) e atingem maiores comprimentos assintóticos (31 mm). PALAVRAS CHAVE: Xiphopenaeus kroyeri, crescimento, Tijucas ABSTRACT Growth of sea-bob-shrimp (Xiphopenaeus kroyeri (Heller 1862)), in Tijucas Bay, Tijucas, SC (Brazil).The Sea-bob-shrimp, Xiphopenaeus kroyeri (Heller, 1862), is widely distributed throughout the Western Atlantic, occurring from North Carolina (USA) to Rio Grande do Sul State (Brazil). The study was accomplished in Tijucas Bay, Tijucas, Santa Catarina State with the objective of contributed with the knowledge of biology and life cycle of the species. Samples were obtained from trawl net artisanal fishery. Growth was estimated, for both sexes, through modal progression analysis (MPA), by using the Bertalanffy growth model. The growth equations obtained were: CL = 31(1-e (-0.0072(t-t0)) ) (female) and CL = 28(1-e (-0.0082(t-t0)) ) (male). Males presented lower longevity values (561 days), higher growth coefficient (0.0082) and smaller asymptotic length (28 mm) than females. Females presented slow growth (0.0072), longevity of 641 days and asymptotic length of 31 mm.
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