Programa de Pós-Graduação em Ecologia Aquática e Pesca - PPGEAP/NEAP
URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/3478
O Programa de Pós-Graduação em Ecologia Aquática e Pesca (PPGEAP) integra o Núcleo de Ecologia Aquática e Pesca da Amazônia (NEAP) da Universidade Federal do Pará (UFPA). Focaliza os problemas relacionados com a conservação e com a gestão dos ecossistemas aquáticos amazônicos, decorrentes do uso dos seus recursos naturais pelo homem, em particular os recursos pesqueiros, para atividades de desenvolvimento econômico e regional.Tem como objetivo geral capacitar recursos humanos capazes de compreender de forma integrada a complexa dinâmica dos ecossistemas aquáticos da Amazônia, visando o uso racional dos seus recursos e sua conservação.
Navegar
Navegando Programa de Pós-Graduação em Ecologia Aquática e Pesca - PPGEAP/NEAP por Agência de fomento "Projeto PIATAM Mar II"
Agora exibindo 1 - 2 de 2
- Resultados por página
- Opções de Ordenação
Item Acesso aberto (Open Access) Avaliação da biologia reprodutiva de Plagioscion squamosissimus (HECKEL, 1840) e Plagioscion surinamensis (BLEEKER, 1873) no terminal de Vila do Conde e área adjacente (Barcarena - PA)(Universidade Federal do Pará, 2009-04-29) BARBOSA, Neuciane Dias; ROCHA, Rossineide Martins da; http://lattes.cnpq.br/4371300451793081; FRÉDOU, Flávia Lucena; http://lattes.cnpq.br/4779271407117528The Port of Vila do Conde, situated in the city of Barcarena/PA, have been exposed to a number of environmental disasters in recent years which can eventually cause the disequilibrium of the use that the aquatic resources make of the environment and consequently to the ecosystem as a whole. Artisanal fishery in this region is relevant, detaching Plagioscion squamosissimus and P.surinamensis as the mains sources of income and food for the population. The objective of this study was to describe the areas of concentration and the reproductive biology of P. squamosissimus and P. surinamensis in the adjacent area of Vila do Conde, mainly identifying the importance of the use of these environments for reproduction. Aiming to identify to the period and fishing sites of greater species abundance, it was obtained the index of abundance CPUE (Kg/viagem) based on data collected from June 2007 to May 2008. The determination of the use of the area for reproduction and the description of reproductive biology was based on 40 to 53 individuals of each species collected from the commercial fishery in a bimensal basis. In laboratory, total length and total weight was registered and gonads were removed for the identification of sexual maturity. The abundance of P. squamosissimus is maximum between September and February and for P. surinamensis it is registered between March the May. The weight-length relationship showed isometry for the females of P. squamosissimus and for both sexes of P. surinamensis. For males of P. squamosissimus positive alometry was registered. The sexual ratio was favorable to the males for P. surinamensis (1,05male: 1female) and favorable to the females (1,11female: 1male) for P. squamosissimus. The value of L50 (length at first maturity) for P. squamosissimus was 16,14 cm for females and 21,43 cm for males. The length at first maturity for P. surinamensis was 27,65 cm for females and 27,13 cm for the males. The percentage of individuals in reproduction of the P. squamisissimus is considerable. The peak of the reproduction of this species (October/November and February/March) coincides with the peak of abundance, indicating that this species is in the area for reproduction. P.surinamensis presented greater percentage of immature and maturing individuals, indicating that this species uses this area mainly as a nursery. For P. surimamensis, reproductive individuals was mainly reported in August/September and October/November.Item Acesso aberto (Open Access) Caracterização da ictiofauna durante o período seco, na Baía do Guajará e Baía do Marajó(Universidade Federal do Pará, 2009) MELO, Ylana Priscila da Costa; FRÉDOU, Thierry; http://lattes.cnpq.br/8119220407894290The Bay of Guajará and Bay of Marajó coverage area of search and inserted into the context of the estuary Paraense, are characterized by receiving the majority of freshwater discharge and submit macrotidal area. The fishing in this region is of great importance to the economy of several municipalities in the state of Pará, including the capture of several species and different fishing gear and two fleets and technologically distinct (artisanal and industrial). As part of the research study in the Bay of Guajará and Bay of Marajó, it was necessary to contribute with important information related to biology and ecology of the environment, where such information was used to perform the characterization of the fish fauna of the area during the dry period in order to survey the local diversity, since the majority of fish landed in Bethlehem is from these areas through fishing. The study included areas belonging to the state of Pará, covering the port terminals Bay of Guajará and Bay of Marajó. An extra collection was performed in the area of the island of Mosqueiro. The data available so far do not show differentiation in the composition of the fauna of the areas studied. It was estimated a total of 37 fish species, accounting for 4379 individuals in the Bay of Guajará Bay of Marajó and Mosqueiro island, where the family was more representative Scianidade grouping species that contributed the most, which were: Hake (Plagioscion squamosissimus) and Curuca (Stellifer rastrifer) (assumed to be constant, ie, effectively making up the fish fauna of the place in the bay of Guajará, as in the bay of Marajó and the island of Mosqueiro). Among the 37 species, 4 were considered constant, 26 were occasional white and 7 catches. Hake (Plagioscion squamossisimus) and Curuca (Stellifer microps) were the most important species for fisheries in terms of catch per unit effort (CPUE), frequency of occurrence, and relative contribution of Simper analysis (multivariate). Being only the island of Mosqueiro that stood out: Mackerel (Pellona flavipinis), because of marine influence in this area is higher, which thus characterizes the local biota and distinguish it from other regions. Overall diversity was low with greater variations, and the evenness remained free of major difference between the areas. The area had low species diversity compared to other estuaries, mainly explained by the high hydrodynamic of the area and high flow vessels, making the environment inhospitable to the emergence of some species. More emphasis has earned the bay of Guajará has great ecological importance because it is considered as the nursery, and therefore economical, as there are commercial species that spend part of their life cycle there.