Este trabalho descreve os canais e as margens de comercialização de cinco espécies de peixes ornamentais capturadas no rio Xingu, estado do Pará, Brasil. A coleta de dados foi realizada de forma intencional e sequencial junto a 51 agentes da cadeia de comercialização, incluindo pescadores, atacadistas e varejistas nacionais e internacionais. Os resultados indicam que as espécies ornamentais podem passar por até seis agentes de comercialização antes do consumidor final. O acari picota-ouro (Scobinancistrus aureatus) é a espécie mais valorizada no mercado, chegando a ser vendida ao consumidor final pelo preço unitário de R$ 543,00, um aumento de 1.361% no mercado norte americano e 1.527% no mercado europeu em relação ao preço da exportação brasileira. As margens de comercialização são elevadas: 92,68% no mercado europeu e 89,24% no mercado norte-americano. Observando as distribuições de benefí­­cios, conclui-se que o mercado internacional se apropria da maior parcela do valor gerado pela atividade.

O açaí é um dos principais alimentos da população paraense e de maior consumo per capita em 2010. A venda de açaí em Belém é realizada por diversas unidades que operam no mercado varejista. O objetivo deste trabalho foi identificar os segmentos de mercado: quitandas, microempreendedores e supermercados, a partir da análise de um conjunto de variáveis que definem as decisões dos consumidores de açaí. Utilizou-se do método stepwise da análise discriminante múltipla para estimar as funções discriminantes. Os resultados mostram que o segmento identificado com maior precisão foi o de quitandas, com 100%, seguido do segmento de supermercado com 96,5% dos casos classificados corretamente, e o segmento de microempreendedores, com 90,9%, apresentou a menor precisão no enquadramento dos consumidores. O modelo estimado apresentou elevada significância no processo de estimação, uma vez que as funções, incluindo as variáveis quantidade de açaí, renda dos consumidores, preço do açaí, qualidade do açaí, preço do peixe e preço da farinha, classificaram corretamente 95,6% dos elementos originais.

The state of Pará has the largest deforested and degraded area in the Amazon, a result from the expansion of extensive livestock, the projects of rural settlement in the Agrarian Reform, mining, timber extraction, hydroelectric power plants and the pressure from large urban centers for food. Reversing the deforestation and soil degradation can thrive with the adoption of appropriate technologies in systems of higher productivity and bioeconomic efficiency, higher social inclusion, and less impact on the environment. The Agroforestry System, formed by the combination of acai, cocoa and black pepper crops, and African mahogany as a forest species, can be one of the alternatives to recover degraded areas and meet the objectives of sustainable development. According to the bioeconomic criteria of viability, this agroforestry system presented a competitive advantage in relation to monocultures of acai, cocoa, and black pepper; due having a higher net present value of US$ 6,508.94/ha; internal rate of return 13.93%; cost-benefit ratio of 1.104; uniform present value of US$ 764.54/ha; occupy more labor and mitigate the emission of greenhouse gases; reduce erosion, recovers water quality and interaction with biodiversity. The inclusion of the opportunity cost of natural assets such as land, water, and forest, and of the benefits with the green certification in the price of products, contributes to the use of good practices in the production, commercialization and preservation of natural resources.

The objective of this study was to identify different market segments for buffalo meat with target groups defined in the city of Belém, Pará, Brazil. Paired samples of beef and buffalo meat were given to 447 volunteers, and a sensory analysis of the products was conducted. After the tasting, a questionnaire was administered to obtain demographic (age, educational level, marital status) and economic (household income) data as well as information on the habits of respondents and preferences regarding buffalo meat. The factors were estimated using the principal components method and the factors with characteristic roots greater than one were extracted. To check the suitability of the factorial model, Bartlett’s sphericity test and the Kaiser-Meyer-Olkin (KMO) test were used. A factor analysis was performed, identifying five factors with common variability dimensions. The study has helped identify four distinct market segments which, combined with a targeted marketing strategy, can be used to leverage the productive chain: I - Young and interested, II - Mixed and indifferent, III - Graduates and successful, and IV - Healthy women. All had positive responses to buffalo meat; clusters I and III stood out with regard to several indicators, especially those related to the preference for buffalo meat and the predisposition to purchase and include it in meals. The sensory analysis indicated that consumers showed a greater acceptance of buffalo meat based on the characteristics of flavour, colour, succulence and tenderness. The study helps to identify market segments with distinct features that, combined with a targeted marketing strategy, can be used to leverage the supply chain.