TÍTULO EM INGLÊS: REPRODUCTION OF THE FISH Leporinus piau (FOWLER, 1941) AND THE ENVIRONMENTAL PARAMETERS OF THE MARECHAL DUTRA RESERVOIR, RIO GRANDE DO NORTE

• Autor(a) principal: Filho, José Júlio Silva
• Data de Publicação: 2012
• Outros Autores: Nascimento, Wallace Silva, Araújo, Andréa Soares, Barros, Nirlei Hirachy Costa, Chellappa, Sathyabama
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Biota Amazônia
• Texto Completo: https://periodicos.unifap.br/index.php/biota/article/view/411

This study verified the reproductive aspects of Leporinus piau (Fowler, 1941) and the environmental variables of the reservoir Marechal Dutra, RN. All captured fish were measured individually and the total length, body and gonad weights were registered. The concentration of dissolved oxygen, pH, electrical conductivity, water temperature and rainfall data were recorded. The average rainfall was 86.5 ± 94.4 mm. The average water temperature was 27 ± 2.2 °C, the average concentration of dissolved oxygen was 6.5 ± 1.4 mgL-1, the average pH was 8.3 ± 0.4 and the average value of the electrical conductivity was 585 ± 29.1 μScm-1.A total of 106 specimes of L. piau were captured, out of which 45 males and 61 females. The sex ratio was 1M:1F. The average length of females was 25.6 ± 3.1cm, and the males was 23 ± 2.3cm. The average weight for the females ranged was 256.5 ± 104.6 g for males and was 178.2 ± 62.9g. The stages ranged from immature, maturing, mature and spent. The monthly changes in GSI of males and females were similar, with low values in September and October, and high values from December to January, followed by lower values from March to May. The condition factor for both sexes showed high in the period from September to November. The reproductive period of L. piau occurs during the period of rain.Keywords: piau; Leporinus piau; reproductive period; gonadosomatic index; Caatinga