Navegando por Assunto "Peixes ornamentais"

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Acesso aberto (Open Access)
Influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental Heros severus (Heckel, 1840)
(Universidade Federal do Pará, 2016-07) VERAS, Galileu Crovatto; PAIXÃO, Daércio José de Macedo Ribeiro; BRABO, Marcos Ferreira; SOARES, Lourdes Marília Oliveira; SALES, Abner Dias
The objective of this work was to evaluate the influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental fish severum (Heros severus). A completely randomized study was used with five treatments (0L:24D, 6L:18D, 12L:12D, 18L:6D, 24L:0D) and four replicates, with the aquaria as the experimental unit. Two hundred severum larvae (3.20±0.16 mg and 5.60±0.00 mm) were distributed into 20 aquariums of one litre at a density of 10 larvae per litre. For a period of 15 days, feed was supplied four times daily with Artemia nauplii in a proportion of 160 nauplii/larvae/feeding. At the end of the experimental period, growth, uniformity, and survival data were subjected to analyses of variance and significance. Manipulation of the photoperiod showed no change in variables because there was no difference in the growth, uniformity, or survival of severum larvae. Thus, for larvae of this species of up to 20 days of age, the manipulation of the photoperiod is not advantageous due to the possible increase in production costs. Therefore, it is recommended to use the photoperiod close to the natural environment.
Acesso aberto (Open Access)
Peixes ornamentais: conhecimento tradicional e regulamentações sobre o manejo da atividade pesqueira no território indígena remanso - Chorrobocón, Guainía - Colômbia
(Universidade Federal do Pará, 2012-09-29) LOPEZ, Juan David Guzman; ALMEIDA, Oriana Trindade de; http://lattes.cnpq.br/0325909843645279
This research offers an analysis of the community management process develop by indigenous fishermen in the ornamental fishery activity and their relation with the institutions responsible of the control of this sector, highlighting: the factors that has facilitated and hindered the participation of the fishermen in the management initiative; the natural resources use systems and their incidence in the family economy; the relation that exists between local arrangements and the formals norms among ornamental use resource, likewise, the relations generated between the agents involved into the management of this activity. This study is characterized by been descriptive analytic from a qualitative approximation by a participatory research, been implemented by the use of rural participatory diagnostic tools and semi-structured interviews; the information was ordered and analyzed by the use of analysis categories and the implementation of two information triangulation types (intra and inter) to maximize the efforts validity made in the field, and to reduce the information subjectivity and maximize the research stringency. The results founded shows that, from the different extractive activities developed by the community, the mining garimpo and the ornamental fishery have been the most constants; however, the illegality conditions of the first has led to the decline, meanwhile the fishery consolidates as the principal resource of income for the habitants; among the factors that have influence in the fishermen participation level along the management process, were found: the institutional intervention, the resource depletion, the inequality in the commercial relations, the internal conflicts, the external pressure, the property regime and the mining depletion. The implementation of the management system adopted by the fishermen is constituted by the syncretism between the local norms supported in the traditional knowledge and the government regulation, in response to the necessity to maintain a stable resource of income than the detriment made by the transgression in the traditional norms around the territory management. In reference to the government scope, the institutional plans does not contains constant programs among this sector, their work is limited to short term plans, besides constants reforms difficult the accomplishment of their responsibilities and the recognition of their functions by the local populations. The main conclusions are: the extractive economics dynamics introduced new acculturation elements that deteriorated the traditional scheme of the social organization and produce new natural resource use possibilities that have led the population into the search of a social ascent from the economic scope; despite the association been based in democratic principles, his performance depends in the clans rivalries that predominates in the community; the fishermen depends from the institutional intervention for the consolidation of their management system, that’s why, the institutional discontinuity have created the weakening of the organization process; the regulation effective application and the local arrangements between fishermen are limited, by one side, the lack of resource, personal and political will restricts its work, by the other side, the external demand and the economic benefits necessity determine the effectiveness of the arrangements implemented; besides, still does not exist a clear instance of coordination that allows to harmonized the institutional programs for the management of this activity
Acesso aberto (Open Access)
Subsídios à formulação de políticas de desenvolvimento local: diagnóstico da pesca familiar extrativista com espécies ornamentais na vila Igarapé-Açú, no município de Capitão Poço, no nordeste do Pará
(Universidade Federal do Pará, 2010-03-12) IMBIRIBA, Kianya Granhen; SANTANA, Antônio Cordeiro de; http://lattes.cnpq.br/2532279040491194
This paper gives a brief account of the ornamental fish farm in Brazil and its development, emphasizing the concept of such activity and the main areas of development in order to detect than the practice of fishing for ornamental fish, owners of commercial value that comes suffering from the reduction of its natural stock due to overfishing. At the level of Brazil, it was observed that the Amazon has more representation on the national scene, because they act on the market for over 50 years in the region, while in Pará, this activity began to be developed at less than 20 years nationally and only 10 years for the export market. It was observed that the state of Para can not reach the state of Amazonas as a matter of inadequate logistics function, economies of scale and cost disadvantage compared to Amazon, with a result of tax benefits offered by this state. The main objective was to analyze and seek to understand the formation of the production of ornamental fish. The results showed the viability and socioeconomic development in the region, exposing its major obstacles: lack of well-educated workforce, lack of bureaucratic procedures of foreign trade by the fishermen, absence of daily international flights from the airport of Bethlehem causing the fishermen picked up the goods from other states, leaving to create wealth for the state of Para and the last obstacle relates to environmental legislation differs from state to state, resulting in Pará has the disadvantage relative to other states, especially the Amazon.