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Ministério da Educação e Universidade Federal Rural da Amazônia | No presente estudo, apresentamos a caracterização da pesca e alguns dados biológicos do camarão invasor Macrobrachium rosenbergii (De Man, 1879) coletados na Vila Canivete, no município de Chaves/PA. As coletas foram realizadas no período de um ano, entretanto, só houve a captura da espécie M. rosenbergii entre os meses julho de 2021 a março de 2022. Para a captura dos camarões, foram utilizados os instrumentos de pesca matapi, com abertura de 0,5 cm, e tarrafa, com abertura de 1 cm entre os nós, utilizando sempre como isca o babaçu. Os dados abióticos temperatura e salinidade foram aferidos durante o estudo. A temperatura manteve-se praticamente constante em todo período variando de 27,6 a 28,1 oC e a salinidade registrou variações de 0,1 no período chuvoso (dezembro e março) a 0,7 o/oo no período de pouca chuva (julho a novembro). Em laboratório os indivíduos foram identificados, sexados, medidos e pesados. Neste trabalho, foram capturados 179 indivíduos, sendo que o número total de fêmeas (72 animais), capturadas durante todo o período, foi inerior em relação aos machos (107 animais). Na média de comprimento total e peso total, os machos apresentaram números superiores aos das fêmeas. Do total de 107 fêmeas capturadas durante o período de pesquisa, 34(47,2%) não apresentaram ovos, em contrapartida, 38(52,8%) apresentaram ovos. A relação, por mês, das fêmeas da espécie M. rosenbergii, foi possível observar que houve predominância das fêmeas ovígeras na maioria dos meses, exceto no mês de outubro de 2021e janeiro de 2022. A ocorrência de fêmeas em estágios de maturação foi observada em todos os meses em que houve a captura, entretanto nos meses de período chuvoso (dezembro e março) houve maior ocorrência. A população da Vila Canivete, no município de Chaves/PA utiliza ativamente o M. rosenbergii nas suas atividades econômicas e de consumo de subsistência. Porém, a presença de uma espécie invasora no ambiente, acarreta um forte dano ao ecossistema. Fazendo-se assim necessário a criação de planos de manejo e controle da invasão do M. rosenbergii na província Amazônica, a fim de preservar o meio natural e a integridade das espécies nativas no ambiente. Além disso, constatou-se que os pescadores do camarão M. rosenbergii necessitam de políticas públicas para promoção de ações educacionais e pesqueiras, bem como a geração de emprego e renda, para melhorar a qualidade de vida da população local. | In this study, we present the characterisation of fishing and some biological data on the invasive shrimp Macrobrachium rosenbergii (De Man, 1879) collected in Vila Canivete, in the municipality of Chaves/PA. The shrimp were collected over a period of one year, but the species M. rosenbergii was only caught between July 2021 and March 2022. To catch the shrimp, the fishing tools used were matapi, with an opening of 0.5 cm, and tarrafa, with an opening of 1 cm between the knots, always using babassu as bait. The abiotic data temperature and salinity were measured during the study. The temperature remained practically constant throughout the period, ranging from 27.6 to 28.1 oC, and salinity varied from 0.1 in the rainy season (December and March) to 0.7 o/oo in the period with little rain (July to November). In the laboratory, the individuals were identified, sexed, measured and weighed. In this study, 179 individuals were captured. The total number of females (72 animals) captured throughout the period was lower than the number of males (107 animals). In terms of average total length and total weight, the males had higher numbers than the females. Of the 107 females caught during the research period, 34 (47.2 per cent) had no eggs, while 38 (52.8 per cent) had eggs. Regarding the number of females of the species M. rosenbergii by month, it was possible to observe that there was a predominance of ovigerous females in most months, except for October 2021 and January 2022. The occurrence of maturing females was observed in all the months in which they were caught, although in the rainy months (December and March) there was a higher occurrence. The population of Vila Canivete, in the municipality of Chaves/PA, actively uses M. rosenbergii in their economic activities and subsistence consumption. However, the presence of an invasive species in the environment causes serious damage to the ecosystem. This makes it necessary to create management plans and control the invasion of M. rosenbergii in the Amazon province, in order to preserve the natural environment and the integrity of native species in the environment. In addition, it was found that M. rosenbergii shrimp fishermen need public policies to promote educational and fishing activities, as well as the generation of employment and income, in order to improve the quality of life of the local population.

Se ha verificado que la especie invasora lenteja de agua ocupa la mayoría de los espejos de aguas tranquilas en la Bogotá-Región y ha generado repercusiones negativas para los ecosistemas cambiando las dinámicas de las especies. El manejo actual de remover manual o mecánicamente la planta es técnica y económicamente difícil dada la capacidad de la especie de replicarse rápidamente. El presente proyecto de investigación busca aprovechar esa capacidad de replicación para la identificación y caracterización de alternativas de economía circular que permitan el aprovechamiento eficiente de la planta. El trabajo se desarrolló en tres fases, la primera encaminada a validar la problemática en la región, la segunda priorizó las alternativas de aprovechamiento a través de un análisis multicriterio y la tercera desarrolló pruebas de laboratorio para corroborar la factibilidad de las alternativas de aprovechamiento priorizadas en la fase dos. Las alternativas mejor calificadas corresponden al compostaje, bioetanol y biodiesel respectivamente, para las cuales, la producción de bioetanol presentó los mejores resultados en laboratorio. | Ingeniero Ambiental | Pregrado | The aquatic invasive species duckweed reported in the majority of calm water mirrors in the Bogotá-Region has generated effects for the ecosystems, changing the dynamics of the species and habitats, and for the economy in general, since its control is economically unsustainable. The purpose of this research project was to identify and characterize circular economy alternatives for the efficient use of the invasive duckweed species, reducing its environmental impact on the water bodies of Bogotá-Region. During the development of the dimensioning phase, bibliographic references were consulted on studies carried out at the regional, national and international level on the problems faced by the invasive species and the alternative uses that could revolve around it. Once the current situation of duckweed was contextualized, the Multicriteria Analysis methodology was extracted, where different criteria concerning the ecological and economic dimensions of the previously consulted utilization alternatives were evaluated qualitatively and quantitatively; Thus, prioritizing the most viable alternatives will be modified for their subsequent controlled performance in the laboratory. For the composting alternative, there was a time of 21 days, 1.5 kg of duckweed was obtained and the need to complement this procedure with other organic waste and/or insects such as: earthworms or slugs to increase its efficiency was verified. ; on the other hand, the biodiesel generation alternative arises from low efficiency with a product of 11,456 ml from the extraction of the essential oil of 30 ml of duckweed and 7 ml of methoxide; Finally, the bioethanol generation alternative showed great efficiency in the distillation procedure with a 48 ml product from 100 ml of fermented duckweed solution.