AbstractThis work conducts a prospection of future scenarios related to the construction of ports in the Uruguayan side of the Merín Lagoon, by consulting experts in different fields that are familiar with the impact that the constructions of such installations would generate. The prospection considers different scenarios that could occur, ascribing to each a probability of occurrence, while the classic projection barely distinguishes a scenario. The prospection of scenarios is a fundamental part of strategic analysis. In this study they are determined by the application of the Grumbach method, the Delphi method, and the Cross-Impact Matrix analysis, the events and scenarios that could occur if the ports projected to be implanted in the Uruguayan region of the Merín Lagoon, would be successfully constructed. These events consider the economic and social setting, as well as major actors present in the system, such as government agencies and social and private entities. This study differs from other work that has been done, since apart from considering points of view that are strictly related to transportation, employment, educational, commercial, and environmental aspects, it takes into account organizations, institutions and companies involved, such as subsystems, that by taking part of a single system, form the regional collective subject. In this context, the possible scenarios are visualized, as well as the determination of the correlation between the different events that comprise those scenario, taking into account the degree of motor skills and dependency of each, understanding that the results obtained could be useful in the strategic order of the decision making process. In the most probable scenario the eight events that were finally selected, occur with a probability of occurrence of 45.65%. Seven events are positioned as colligates, one acting as an explanatory agent, two are autonomous, and one acts as the outcome existing convergence between the opinions of the participants from the public and private sector.

ResuménEste trabajo realiza la Prospección de Escenarios futuros relacionados con la construcción de puertos en la parte uruguaya de la laguna Merín, mediante consulta a expertos en las distintas áreas que tienen relación con el impacto que generaría la construcción de dichas instalaciones. La prospección considera distintos escenarios que puedan ocurrir, adjudicándole a cada uno una probabilidad de ocurrencia, mientras la proyección clásica distingue apenas un escenario. La Prospección de Escenarios es una parte fundamental en el análisis estratégico. En el presente estudio son determinados, mediante la aplicación de los métodos Grumbach, Delphi y Matriz de Impactos Cruzados, los eventos y escenarios que podrían darse si los puertos proyectados para la región referida anteriormente, efectivamente fueran construidos. Estos eventos consideran el ambiente económico y social, así como a los principales actores presentes en el sistema, tales como organismos públicos y entidades sociales y privadas. El presente estudio se diferencia de otros trabajos realizados, ya que considera, además de puntos de vista estrictamente relacionados al transporte, aspectos laborales, educativos, comerciales y ambientales, teniendo en cuenta organizaciones, instituciones y empresas comprometidas, como subsistemas, que haciendo parte de un sistema único, conforman el sujeto colectivo regional. En este contexto, se visualizan los escenarios posibles así como la determinación de la correlación entre los distintos eventos que conforman esos escenarios, considerando los grados de motricidad y dependencia de cada uno de ellos, entendiéndose que los resultados obtenidos podrían ser útiles en el proceso de toma de decisiones de orden estratégico. En el escenario más probable ocurren los ocho eventos finalmente seleccionados con una probabilidad de ocurrencia de 45,65%. Seis eventos se posicionan como de coligación, uno como explicativo, dos como autónomos y uno como de resultado existiendo convergencia entre las opiniones de los participantes del sector público y el privado.

Resumo Com o grande crescimento nas últimas décadas da movimentação de cargas por contêineres, os terminais de contêineres vem contribuindo, de forma significativa, na cadeia logística nacional e internacional. Como forma de aumentarem sua produtividade, esses terminais precisam conhecer seu potencial de captação de mercadorias e suas limitações. Esse estudo teve como objetivo observar as tendências de crescimento ou redução na produtividade de terminais de contêineres brasileiros, ao longo de determinado período de tempo. O período analisado foi de 2004 a 2011. Para tal, utilizou-se um modelo DEA conhecido como Modelo de Janelas. Para Análise de Janelas foi utilizado escore estimado a partir do modelo BCC com orientação para produto. Para o período analisado, o terminal TECON Santos foi o único que se manteve eficiente ao longo de todo o período. Os terminais CONVICON (PA), Libra-Rio, Libra Santos (SP) e Tecon Rio Grande (RS) se mostraram eficientes na movimentação de contêineres em parte desse período.

Abstract With the large growth of the movement of cargo containers in the last decades, container terminals have been contributing significantly to the supply chain, both, nationally and internationally. As a way to increase productivity, such terminals must know their limitations and potential for the uptake of goods are known. This study aimed to observe the growth trends or reduction in the productivity of Brazilian container terminals, over a given period. The studied period was from 2004 to 2011. For such purpose, Data Envelopment Analysis (DEA) method, also known as windows model, was applied. For windows analysis, estimated score from the BCC model with guidance for product was used. For the mentioned period under review, the terminal Tecon Santos was the only one that remained effective throughout the period. The other terminals, CONVICON (PA), Pound-Rio, Libra Santos (SP) and Tecon Rio Grande (RS), were effective in moving containers during part of the same period.

The objective of the present study was to evaluate the growth performance of the shrimp Litopenaeus vannamei and the mullet Mugil platanus in earthen ponds (200 m²) located in the Laboratory of Continental Aquaculture of Universidade Federal do Rio Grande (FURG), in both polyculture and monoculture systems. The study consisted of three replicates, as follows: shrimp monoculture (SM), shrimp and mullet polyculture (PO) and mullet monoculture (MM). The stocking density was 10 post-larvae shrimp (PL) m−2 and 0.67 mullet m−2. Fish and shrimp were fed commercial shrimp meal (38% crude protein) once a day. Initially, the amount of feed to shrimp was 20% of their total biomass which was later reduced to 5%. Mullets were fed at 5% of their stocked biomass. The experiment lasted 79 days during the summer of 2007/2008. At harvest, shrimp in monoculture had weight gain (15.59 g), specific growth rate (8.40% day−1), apparent feed conversion (0.88), survival (91%) and production (1.454 kg ha−1) significantly higher than in polyculture (1.039 kg ha−1). Mullets in polyculture had significantly better weight gain (42.72 g) and specific growth rate (3.99 % day−1) than those in monoculture (31.04 g and 3.69% day−1, respectively), while the mullet condition factor was significantly smaller in polyculture (1.06) than in monoculture (1.13). The apparent feed conversion of the mullets did not present significant differences between monoculture (2.50) and polyculture (2.40). The physical and chemical water parameters were not significantly different in any of the experiments, except for the transparency, which was higher in earthen ponds with mullet monoculture. Polyculture of shrimp and mullet reared together in earthen ponds negatively affects the shrimp production and favors the production of mullets.