32 documents found, page 1 of 4
Invasive dynamics of the signal crayfish Pacifastacus leniusculus in a protecte...
Carvalho, Francisco; Alves, Henrique; Pascoal, Cláudia; Castro, Paulo; Miranda, Fernando Jorge Veloso; Teixeira, Amílcar; Cássio, FernandaInvasive species have been drivers of biodiversity loss and functional changes in aquatic ecosystems, including in protected areas. Therefore, monitoring population invasion dynamics and biological traits is fundamental to better understand their ecological and economic impacts and for management actions development. We followed signal crayfish (Pacifastacus leniusculus) invasion in Rabaçal River upper reach at...
A roadmap for the conservation of freshwater mussels in Europe
Sousa, Ronaldo; Zając, Tadeusz; Halabowski, Dariusz; Aksenova, Olga V.; Bespalaya, Yulia V.; Carvalho, Francisco; Castro, Paulo S.; Douda, KarelEurope has a long history of human pressure on freshwater ecosystems. As pressure continues to grow and new threats emerge, there is an urgent need for conservation of freshwater biodiversity and its ecosystem services. However, whilst some taxonomic groups, mainly vertebrates, have received a disproportionate amount of attention and funds, other groups remain largely off the public and scientific radar. Freshw...
Interspecific differences in the physiological condition of native freshwater m...
Modesto, Vanessa; Ilarri, Martina; Castro, Paulo S.; Carvalho, Francisco; Cavalheri, Thais; Lopes-Lima, Manuel; Teixeira, Amílcar; Ozório, Rodrigo O.A.The Asian clam Corbicula fluminea has been widely introduced into aquatic ecosystems and may impact the physiological condition and survival of native freshwater mussels. However, very few studies have evaluated this issue quantitatively. To fill this gap, manipulative field experiments were performed to assess two possible mechanisms of impact on native mussels: (i) interspecific interactions, and (ii) C. flum...
Interspecific differences in the physiological condition of native freshwater m...
Modesto, Vanessa; Ilarri, Martina; Castro, Paulo; Carvalho, Francisco; Cavalheri, Thais; Lopes-Lima, Manuel; Teixeira, Amilcar; Ozorio, Rodrigo O. A.The Asian clam Corbicula fluminea has been widely introduced into aquatic ecosystems and may impact the physiological condition and survival of native freshwater mussels. However, very few studies have evaluated this issue quantitatively. To fill this gap, manipulative field experiments were performed to assess two possible mechanisms of impact on native mussels: (i) interspecific interactions, and (ii) C. flum...
Nautical Tourism in Medio Tejo (Portugal): the wakeboard activity
Lopes, Eunice; Carvalho, Francisco; Simões, João TomazNautical tourism is a growing product in Portugal, following a long tradition related to aquatic products. The wakeboard activity gained important visibility, especially due to the first world championship, in 2017, on the Zêzere river. The study now presented focuses mainly on the importance of valuing river-water resources and the Zêzere river, through wakeboard activity, for the consolidation of an efficient...
Combined per‐capita and abundance effects of an invasive species on native inve...
Carvalho, Francisco; Pascoal, Cláudia; Cassio, Fernanda; Teixeira, Amílcar; Sousa, Ronaldo1. Invasive alien species (IAS) are leading to the homogenisation of taxonomic and functional biodiversity, with negative consequences for key ecosystem processes in fresh water. Invasive signal crayfish (Pacifastacus leniusculus) is expected to disrupt detritus-based food webs by affecting leaf breakdown and/or by decreasing invertebrate density and diversity through predation. The combination of per-capita an...
Participation in Physical Education Classes and Health-Related Behaviours among...
Martins, João; Marques, Adilson; Gouveia, Elvio Rúbio; Carvalho, Francisco; Sarmento, Hugo; Valeiro, Miguel GonzálezThe present study sought to examine the associations between participation in physical education (PE) classes and a range of health-related behaviours among adolescents. Secondary analysis of self-reported data from the Global Student Health Survey, collected between 2010 and 2017 from 222,121 adolescents (N = 117,914 girls; 49.0%; aged 13-17 years) from 67 countries and five world regions, was carried out. Par...
Combined per-capita and abundance effects of an invasive species on native inve...
Carvalho, Francisco; Pascoal, Cláudia; Cássio, Fernanda; Teixeira, Amílcar; Sousa, Ronaldo GomesInvasive alien species (IAS) are leading to the homogenisation of taxonomic and functional biodiversity, with negative consequences for key ecosystem processes in fresh water. Invasive signal crayfish (Pacifastacus leniusculus) is expected to disrupt detritus-based food webs by affecting leaf breakdown and/or by decreasing invertebrate density and diversity through predation. The combination of per-capita and a...
A roadmap for the conservation of freshwater mussels in Europe
Sousa, Ronaldo Gomes; Zając, Tadeusz; Halabowski, Dariusz; Aksenova, Olga V.; Bespalaya, Yulia V.; Carvalho, Francisco; Castro, Paulo; Douda, KarelEurope has a long history of human pressure on freshwater ecosystems. As pressure continues to grow and new threats emerge, there is an urgent need for conservation of freshwater biodiversity and its ecosystem services. However, whilst some taxonomic groups, mainly vertebrates, have received a disproportionate amount of attention and funds, other groups remain largely off the public and scientific radar. Freshw...
Multi-alphabetic hypercubes
Francisco, Carla; Mexia, João T.; Oliveira, Manuela; Carvalho, FranciscoThese hypercubes generalize the well-known Graeco-Latin squares. In one dimension m hypercube we have pm 'points' with m coordinates taking the values 0; 1; : : : ; p 1. In each point we locate letters from m distinct alphabets. When we vary one of the coordinates, we get all the letters of each of the alphabets. We show, how to use vector spaces over Galois Fields to obtain such hypercubes. Moreover, these hyp...