Idade e crescimento de Hemiramphus brasiliensis (Linnaeus, 1758) no litoral de Pernambuco

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The Ballyhoo, Hemiramphus brasiliensis, has a key role in the ecosystem and in the fisheries. Studies on the biology and dynamics of populations are of fundamental importance for the management of fisheries resources and to better understand its role in the ecosystems. This work aims to study the age and growth of H. brasiliensis at Pernambuco coast, using the microstructure of Lapillus otolith. Rings of 318 otoliths prepared, in fine sections were read. Age data through the study of microincrements obtained the best fit of von Bertalanffy model. The estimated parameters were: L=251,59 mm; k = 0,01 day-1 and t0 = 17,64 days. The frequency of increments formation was investigated by regression of the difference in the average number of weekly increments of sampling. T test confirmed the frequency of daily deposition. Data indicated rapid growth and that the asymptotic length was reached in a short time. Combined to the low fertility of the specie and information of the decline of fisheries production in recent years it is possible to notice the fisheries resource fragility due to anthropic impact

ASSUNTO(S)

population dynamics otolith agulha-preta ballyhoo lapillus dinÃmica de populaÃÃes lapillus utilizacao dos animais otÃlito

ACESSO AO ARTIGO

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