Processo de Hipofisação Decolossoma Macropomum, Nocentro de Pesquisas Ictiológicas Rodolpho Von Ihering/Dnocs, Pentecoste/Ce.

Abstract

Aquaculture currently accounts for more than half of fish production for human consump tion, allowing for an increase in per capita fish consumption, which reached a new record high of 20 kg by 2014. The captive production of Brazilian native fish has not yet is as influential as the production of exotic fish because of the lack of technolog ical packages that make it viable. However, the pr oduction of the native species t ambaqui, Colossoma macropomum (Cuvier, 1816) has been gaining special attention in recent years due to its zootechnical characteristics. One of the major problems faced in th e production of tambaqui is its diff icult reproduction in captivity. B ecause it is a rheop hilic fish, it needs to rise the river, swimming against the current for the maturation of the gonads to occur. In captivity it is difficult to simulate the current, requiring the use of hypophyseal hormones to allow full gonadal development and, consequently, large scale production of fingerlings. Thus, the aim of the stage was to follow the process of hypophysation to obtain tambaqui juveniles. The different stages o f the process, from the selection of matrices, the transport of the matrices, the ovarian biopsy process, the application of th e first and second doses of the hypohyseal hormone, as well as the time de gr e e count, follow up of the extrusion and fertilizatio n, as well as egg hatching and larval hatching and storage in ponds . In this way, to know the stages of hypophy sation of tambaqui adopted by the Rodolpho von Ihering Ichthyology Research Center of the DNOCS, were of great importance for the professional an d individual enrichment, because it merged the theoretical knowledge obtained during the course with those of the practice of the system of culture.