10 documents found, page 1 of 1
Exploring foraging preference of local fish species towards non-indigenous foul...
Chebaane, Sahar; Pais, Miguel Pessanha; Engelen, Aschwin; Ramalhosa, Patrício; Silva, Rodrigo; Gizzi, Francesca; Canning-Clode, JoãoNon-indigenous species (NIS) spread from marinas to natural environments is influenced by niche availability, habitat suitability, and local biotic resistance. This study explores the effect of indigenous fish feeding behaviour on NIS proliferation using fouling communities, pre-grown on settlement plates, as two distinct, representative models: one from NIS-rich marinas and the other from areas outside marinas...
Citizen science and expert judgement: A cost-efficient combination to monitor a...
Parretti, Paola; Monteiro, João Gama; Gizzi, Francesca; Martinez-Escauriaza, Roi; Alves, Filipe; Chebaane, Sahar; Almeida, Silvia; Pais, Miguel PessanhaMapping the distribution and evaluating the impacts of marine non-indigenous species (NIS) are two fundamental tasks for management purposes, yet they are often time consuming and expensive. This case study focuses on the NIS gilthead seabream Sparus aurata escaped from offshore farms in Madeira Island in order to test an innovative, cost-efficient combined approach to risk assessment and georeferenced dispersa...
From plates to baits: using a remote video foraging system to study the impact ...
Chebaane, Sahar; Canning-Clode, João; Ramalhosa, Patrício; Belz, Janina; Castro, Nuno; Órfão, Inês; Sempere-Valverde, Juan; Engelen, AschwinMarinas are a gateway for the introduction and establishment of non-indigenous species (NIS). In these habitats, competition and predation are crucial determinants for NIS establishment and invasiveness. However, fish trophic preferences and biotic effects inside marinas are poorly known. This study proposes a novel method that combines the deployment of settlement plates to recruit different assemblages, follo...
Screening of human and veterinary pharmaceuticals in estuarine waters: A baseli...
Reis Santos, Patrick; Pais, Miguel Pessanha; Duarte, Bernardo; Caçador, Isabel; Freitas, Andreia; Vila Pouca, Ana S.; Barbosa, Jorge; Leston, SaraWe investigated the presence of 66 human and veterinary pharmaceuticals from seven therapeutic groups in surface waters of the Tejo estuary. Collection sites covered the entire estuary and included areas near main river inflows and wastewater treatment outfalls, traversing urban, agriculture, aquaculture, and nature reserve areas. Detection of pharmaceuticals was performed via UHPLC-TOF-MS. Pharmaceuticals were...
Effect of underwater visual survey methodology on bias and precision of fish co...
Pais, Miguel Pessanha; Cabral, HenriqueBias in underwater visual census has always been elusive. In fact, the choice of sampling method and the behavioural traits of fish are two of the most important factors affecting bias, but they are still treated separately, which leads to arbitrarily chosen sampling methods. FishCensus, a two-dimensional agent-based model with realistic fish movement, was used to simulate problematic behavioural traits in SCUB...
Fish behaviour effects on the accuracy and precision of underwater visual censu...
Pais, Miguel Pessanha; Cabral, HenriqueUnderwater visual census (UVC) methods are used worldwide to monitor shallow marine and freshwater habitats and support management and conservation decisions. However, several sources of bias still undermine the ability of these methods to accurately estimate abundances of some species. The present study introduces FishCensus, a spatially-explicit individual-based model that simulates underwater visual census o...
From a local observation to a European-wide phenomenon: Amphibian deformities a...
Laurentino, Telma G.; Pais, Miguel Pessanha; Rosa, Gonçalo M.In the last decades increasing records of morphological abnormalities in many amphibian populations have become subject of scientific interest. Once considered a mere curiosity, this worldwide phenomenon has been highlighted as a potential local conservation issue, for it appears to be yet another threat to amphibian diversity. Our study reports the first cases of amphibian deformities for North-Central Portuga...
A framework for the assessment of MPA effectiveness based on life history of fi...
Batista, Marisa Isabel; Henriques, Sofia; Pais, Miguel Pessanha; Cabral, HenriqueChanges in ecosystems structure and function due to the high impacts human pressures on oceans have led to the increasing numbers of Marine Protected Areas (MPA), since MPA are widely accepted as adequate tools to protect, maintain, and restore ocean ecosystems. Increases in density, size and biomass of organisms within protected areas have often been found. However, their worldwide effectiveness is compromised...
Ichthyofauna of the Selvagens Islands. Do small coastal areas show high species...
Almada, Frederico; Abecasis, David; Villegas-Ríos, David; Henriques, Sofia; Pais, Miguel Pessanha; Batista, Marisa Isabel; Costa, Bárbara Horta eThe Selvagens Islands are located in the northeastern Atlantic between the Canary Islands and Madeira Island. As a result of their small size, remote location and harsh sea conditions only a few studies have been conducted to describe their marine species diversity. We were able to identify 29 new coastal fish species, an increase of 33% in the ichthyofauna described for these islands (n = 88). There is a preva...
Dealing with uncertainty and heterogeneity in the assessment of structural and ...
Pais, Miguel PessanhaTese de doutoramento, Biologia (Biologia Marinha e Aquacultura), Universidade de Lisboa, Faculdade de Ciências, 2013; The increasing level of human pressure on marine ecosystems has led to higher awareness towards the need to understasnd the inter-connection of direct and indirect effects on communities and populations. Therefore, in the assessment of marine fish assemblages, there is an ongoing shift from moni...