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Aspectos ecológicos de decápodos del río Guayuriba (Meta, Colombia)

机译：Guayuriba河（Meta，Colombia）的生态方面

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The biomass and detritus-shredding role of the decapods contribute to the organic matter processing and nutrient recycling in the aquatic ecosystems. However, little is known about their biology and ecology. The objective of this research was to determine the richness and distribution of decapods, and to describe some of their biological aspects in the Guayuriba river. We caught the organisms with electric fishing in eleven stations. Richness and distribution were determined. We compare density diagrams through Kruskal-Wallis test, total length, of cephalothorax and weight, between males, females and stations. We related the number and weight of eggs against weight and length of the cephalothorax of Macrobrachium reyesi females. Three species were recorded, the most frequently was M. reyesi, followed by Forsteria venezuelensis and Macrobrachium amazonicum. Contrary to M. amazonicum, the females of M. reyesi were larger than the males. At spatial level, males and females of M. reyesi registered significant differences in total length, cephalothorax, and weight, and these were higher in ovate females than in non-ovate females. Female sizes were positively correlated with eggs’ number and egg weight. M. reyesi presents similar reproductive strategies to species fully adapted to freshwater. Its size to reach sexual maturity is relatively small in relation to other shrimp species. This basic research will facilitate suitable management of resources with fishing potential in the Orinoquia, characterized by its great water richness.
机译：脱落片的生物质和碎屑碎裂作用有助于水生生态系统中的有机物质加工和营养素回收。然而，对他们的生物学和生态知之甚少。本研究的目的是确定脱盖的丰富性和分布，并描述了与瓜乌里巴河的一些生物方面。我们捕获了11个电台的电力捕鱼的生物。确定丰富和分布。我们通过Kruskal-Wallis测试，总长度，头孢噻吩和重量，在雄性，女性和站之间进行比较密度图。我们相关的鸡蛋的数量和重量免受大鼠雷斯西女性的脑头颅的重量和长度。记录了三种物种，最常是M. Reyesi，其次是Forsteria委内瑞斯和大草毛茸的Amazonicum。与M. Amazonicum相反，M. Reyesi的女性大于男性。在空间水平，M. reyesi的雄性和女性在reyesi的总长度，头部躯干和重量的显着差异，这些卵形女性比非卵形女性更高。女性尺寸与鸡蛋数和鸡蛋重量呈正相关。 M. Reyesi对完全适应淡水的物种具有类似的生殖策略。它的尺寸与其他虾类相对较小。这项基本研究将促进适当的资源管理，厄诺喹累亚洲捕捞潜力，其特点是其巨大的丰富性。

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