ICB - Instituto de Ciências Biológicas
URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/2151
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Item Acesso aberto (Open Access) Food consumption as an indicator of the conservation of natural resources in riverine communities of the Brazilian Amazon(Universidade Federal do Pará, 2015-12) NAHUM, Victoria Judith Isaac; ALMEIDA, Morgana Carvalho de; GIARRIZZO, Tommaso; DEUS, Cláudia Pereira de; VALE, Rozeilza; KLEIN, Gilmar Nicolau; BEGOSSI, AlpinaThe present study analyzed and compared the daily consumption of foods of animal origin in eleven communities of the Lower Amazon, Trombetas and Purus Rivers, representing three different management systems and levels of conservation in the Brazilian Amazon. All food items of animal origin were weighed by at least 10% of the families in the study communities during a week in each period of the flood cycle between 2006 and 2008. Fish was the most important food, and was consumed during six days of the week, with an average rate of 169 kg.person-1.year-1. Game was second in importance, with 37 kg.person-1.year-1. This yearly rate of fish consumption is one of the highest in the world and is almost double the minimum recommended by the World Health Organization. The dietary patterns reflect both the isolation of the communities from large urban centers and the better preservation of the local environments due to the existence of protected areas. Environmental degradation may thus have effects on the health and food security of local populations. The study emphasizes the need for the implementation of public policies and participative management initiatives.Item Acesso aberto (Open Access) Transfer cells in trichomatous nectary in Adenocalymma magnificum (Bignoniaceae)(Universidade Federal do Pará, 2016-01) GAMA, Thália do Socorro Serra; DIAS, Ana Cristina Andrade de Aguiar; DEMARCO, DiegoTransfer cells are specialized cells that play an important role where there are high energy costs due to facilitation of transmembrane flow of solutes. This study aimed to investigate the ontogenesis, histochemistry and ultrastructure of glandular trichomes focusing on stalk cells and their possible transfer function. Samples of prophylls of axillary buds, calyces of flowers in anthesis, and flower buds in different stages of development were collected, fixed and processed according to the common methods of microscopy. The glandular trichomes are composed of a secretory head with its cells in columnar format. The stalk is formed by two layers of cells, with the upper layer composed of cuboidal cells where the wall starts to thicken at the beginning of the pre-secretory phase. The secretion is heterogeneous, releasing glucose, other carbohydrates, lipids and phenolic compounds, with two types of release - eccrine and granulocrine. These trichomes are functionally termed as nectaries. The stalk cells appear as transfer cells since they have a thicker anticlinal wall with irregular ingrowths. The presence of transfer cells in thenectaries suggests a high specialization because it improves transport capacity of nectar and compensation in the high energy expenditure for its production and release.