7 documents found, page 1 of 1
Fishways in Portugal: status, main findings and research needs
Santos, J.M.; Quaresma, A.L.; Romão, F.; Amaral, S.D.; Mameri, D.; Santo, M.; Bochechas, J.; Telhado, A.; Godinho, F.N.; Pádua, J.; Pinheiro, P.J.Anthropogenic barriers fragment Portuguese rivers, threatening endemic freshwater fish communities. This study compiled national inventories and peer-reviewed research (2002–2024) to quantify fishway implementation, evolution and typology, while evaluating fish performance from published research. One hundred fishways built between 1950 and 2024 were recorded, half of which were constructed after the implementa...
Development of gastronomic strategies for the application and valorization of n...
Silva, A.T.; Morgado, C.; Félix, N.; Basto de Lima, Maria Gabriela; Laranjeira, Cristina; Brandão, Carlos; Guerra, M.Strategic innovation must anticipate consumer’s acceptance and commercial potential in their design process. The main objective of this study was to develop gastronomic applications with the use of water-in-oil (60 to 65% lipid phase) innovative inverse emulsion prototypes (which preserve expensive/seasonal raw materials and value surplus/regional by-products) (1), appealing to the final consumer. Five emulsion...
Tank and field experiments of short-range acoustic propagation through a seagra...
Felisberto, Paulo; Silva, J. P.; Jesus, Sergio; A.J. Silva; Silva, A.T.; Silva, J.; Santos, R.; Ferreira, H.; Pousao, P.Aiming at monitoring the bubbles released during seagrass photosynthesis in different conditions, three experiments were made: two in an outdoor tank and one in the field. The outdoor tank experiments were conducted in winter and summer conditions with Cymodocea nodosa plants transplanted from a nearby meadow. The field experiment took place in September 2018 on a Posidonia oceanica meadow, where bubbles format...
Use of electromyogram telemetry to assess the behavior of the Iberian barbel (L...
Alexandre, C.M.; Quintella, B.R.; Silva, A.T.; Mateus, C.S.; Romão, F.; Branco, P.; Ferreira, M.T.; Almeida, P.R.Decline in fish species populations due to river regulation by dams and weirs promoted the development of fishways, which are becoming one of the most common measures for the restoration of connectivity in rivers. Fishways efficiency can be species specific and thus monitoring and evaluation, and subsequent adjustments to design and hydraulic features, are required to inform potential users prior to installatio...
Greenhouse Energy Consumption for Tomato Production in the Iberian Peninsula Co...
Baptista, F.J.; Silva, A.T.; Navas, L.M.; Guimaraes, A.C.; Meneses, J.F.Greenhouse climate models are a powerful tool which allows the simulation of inside environmental conditions as a function of external conditions, construction and environmental control equipments characteristics. They also permit to evaluate the energy consumption necessary to obtain the predefined conditions. A theoretical study of the greenhouse energy requirements for all year round tomato production in Por...
Assessing the behavioural response of the Iberian barbel (Barbus bocagei) in a ...
Quintella, B.R:; Mateus, C.S.; Silva, A.T.; Ferreira, M.T.; Almeida, Pedro R.Portuguese rivers are particularly regulated by dams and weirs that, by deterring fish migration, contribute to species and habitat loss. Fishways can minimize part of the negative impacts associated with these obstructions but their efficiency must be guaranteed by adjusting the design of the facilities to the potential users. In this study we used an experimental pool-and-weir type fishway to study the swimmi...
Studies on the mineral nutrition of the rice plant: VIII. accumulation of macro...
Malavolta, E.; Penna, A.; Flório, A.; Frenhani, A.A.; Silva, A.T.; Rodrigues, B.N.; Paulo, E.M; Costa, N.A.; Santos, P.M.; Katayama, P.S.; Naves, R.V.Rice plants, IAC 25 variety, were grown in nutrient solution; samples were taken for analysis at different intervals, namely 21, 50, 79, 91 and 112 days after germination. Main conclusions were the following: (1) both dry matter production and accumulation of macronutrients as a function of time were described by typical sigmoide curves; (2) in the period between the second and third sampling the rate for both ...