Ciclo reprodutivo e indução hormonal de fêmeas de mapará (Hypophthalmus marginatus) no baixo Rio Tocantins, à jusante da barragem de Tucuruí

• Autor(a) principal: Hainfellner, Patrick [UNESP]
• Data de Publicação: 2015
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/144098
• topic: Peixe - Reprodução; Esteroides; Expressão gênica; Peixe - Desova; Gonadotropinas; Fishes

This study is part of a broader proposal entitled Culture of mapará and Amazon shrimp in multiespaciais and multitrophic systems. This proposal is a partnership between the Aquaculture Center of the São Paulo State University (CAUNESP), the Foundation for Research of the State of São Paulo and Company of Vale do Rio Doce (Partnership for Technological Innovation - PITE). In the original proposal, broader and with several other researchers involved it was planned to execute three subprojects, that had the main objective to develop knowledge and technology to develop sustainable systems for aquaculture production of mapará and amazon shrimp with an ecosystem approach. Thus, initially this study had to make, the first attempts to domesticate and transport mapará breeders to a pond located in CAUNESP. Since this is an unprecedented proposal for bioprospecting, it was not possible to predict the response of mapará on the attempts of domestication, because even being intensively explored, there was not even a single information about its cultivation. The specie proved to be extremely sensitive to handling, which made us try to replace the breeders transport by attempts to induce spawning of wild breeders in their natural spawning location (being this, one of the objetive of this thesis from the beginning). In this study we focus on two main objectives: the reproductive cycle of the species (manuscript I) and the standardization of a protocol for induced spawning (manuscript II). This study is than composed by two manuscripts, which the first generated information for the second. The lack of information and the problem with dams in the study region led us to approach others subjects, necessary but not predicted, such as the interruption of migratory routes, the dam impact on the population of mapará and about their reproductive biology. As a result, we found that the species presents reproductive peculiarities, because despite having ...