32 documents found, page 1 of 4
New evidence of alternative migration patterns for two Mediterranean potamodrom...
Rato, Ana; Alexandre, Carlos Manuel; Pedro, Sílvia; Mateus, Catarina; Pereira, Esmeralda; Belo, Ana Filipa; Quintella, BernardoIberian barbel (Luciobarbus bocagei Steindachner, 1864) and Iberian nase (Pseudochondrostoma polylepis Steindachner, 1864) are two Mediterranean potamodromous fish species known to perform annual upstream migrations to reach spring spawning grounds. In the Mondego River basin, at the Coimbra dam, migratory movement patterns and individual size structure were assessed through a video recording monitoring system ...
Worldwide Soundscapes: A Synthesis of Passive Acoustic Monitoring Across Realms
Darras, Kevin F. A.; Rountree, Rodney A.; Van Wilgenburg, Steven L.; Cord, Anna F.; Pitz, Frederik; Chen, Youfang; Dong, Lijun; Rocquencourt, AgnèsAim The urgency for remote, reliable and scalable biodiversity monitoring amidst mounting human pressures on ecosystems has sparked worldwide interest in Passive Acoustic Monitoring (PAM), which can track life underwater and on land. However, we lack a unified methodology to report this sampling effort and a comprehensive overview of PAM coverage to gauge its potential as a global research and monitoring tool. ...
Do catadromous thinlip grey mullet beneft from shifting to freshwater? A perspe...
Pereira, Esmeralda; Jorge, André; Quintella, Bernardo; Gomes da Silva, Marco; R. Almeida, Pedro; Lança, Maria JoãoAbstract To investigate the potential benefts of the catadromous thinlip grey mullet Chelon ramada Risso, 1827) migration to freshwater, the total lipid content and fatty acid (FA) profle of female’s muscle and gonads caught in both the estuary and river were analyzed. The freshwater contingent presented a higher body condition, greater muscle gross energy, and larger gonads with higher lipid reserves. These an...
Acoustic fish community in the Madeira Archipelago (North Atlantic Ocean): Char...
Muñoz-Duque, Sebastian; Fonseca, Paulo; Quintella, Bernardo; Monteiro, João Gama; Fernandez, Marc; Silva, Rodrigo; Vieira, Manuel; Amorim, M. Clara P.Marine ecosystems are increasingly subjected to anthropogenic pressures, which demands urgent monitoring plans. Understanding soundscapes can offer unique insights into the ocean status providing important information and revealing different sounds and their sources. Fishes can be prominent soundscape contributors, making passive acoustic monitoring (PAM) a potential tool to detect the presence of vocal fish sp...
First assessment of passive acoustics as a tool to monitor the endangered Medit...
Muñoz‐Duque, Sebastian; Vieira, Manuel; Fonseca, Paulo; Quintella, Bernardo; Charrier, Isabelle; Monteiro, João Gama; Fernandez, Marc; Silva, Rodrigo1. The rarest seal and the world's most endangered pinniped species, the Mediterranean monk seal (Monachus monachus), has a small and isolated population in the Madeira Archipelago (Portugal). This species tends to be extremely wary of humans and, therefore, very difficult to approach and study. 2. Passive acoustic monitoring (PAM) is a non-invasive, cost-effective tool that can be a valuable complement for the...
LIFE Agueda-Gaining Habitat for Migratory Fish in the Vouga River Basin
Pedro, Sílvia; Alexandre, Carlos; Mateus, Catarina; Quintella, Bernardo; Lança, Maria João; Belo, Ana Filipa; Pereira, Esmeralda; Rato, Ana SofiaHabitat loss and overfishing are the most significant threats to diadromous fish, most of them of high socioeconomic and conservationist importance, such as Alosa alosa, Alosa fallax, Petromyzon marinus and Anguilla anguilla. The main objective of the LIFE Águeda project (LIFE16 ENV/PT/000411) is the removal of hydro-morphological pressures towards the reestablishment of conditions for a good ecological status,...
Impact of Fisheries on Allis Shad's (Alosa alosa L.) Spawning Population Struct...
Belo, Ana; Mateus, Catarina; Quintella, Bernardo; Pereira, Esmeralda; Moreira, André; Oliveira, Roberto; Batista, Carlos; Almeida, PedroAllis shad (Alosa alosa L.) populations have suffered declines and even regional extinction across their distribution range, mainly due to river impoundment, overexploitation, and pollution. In Portugal, the species is classified as Endangered (EN). This fish is regarded as a valuable delicacy, and commercial fisheries dedicated to this species in Portugal are found in rivers in Minho, Lima, Cávado, Douro, Voug...
Migration Patterns and Behaviour of Trout (Salmo trutta L.) in the Southern Lim...
Silva, Sara; Alexandre, Carlos; Ribeiro, Ana; Domingues, Andreia; Rato, Ana; Joana, Pereira; Mateus, Catarina; Quintella, Bernardo; Almeida, PedroThe trout Salmo trutta L. is an iconic fish species very well studied across most of its range. However, there is a lack of information about the biology and ecology of S. trutta populations from southern European rivers, which coincide with the southern limit of its global distribution. This study aims to analyse the movement patterns and habitat use of S. trutta in the Mondego River basin, Central Portugal, a...
Fish pass use by shads (Alosa alosa L. and Alosa fallax (Lacépède, 1803)): impl...
Belo, Ana; Cardoso, Gabriela; Pereira, Esmeralda; Quintella, Bernardo; Mateus, Catarina; Alexandre, Carlos M.; Batista, Carlos; Telhado, AnaFish pass monitoring is essential to ensure the device's effectiveness as a mitigation measure for river impoundment, guaranteeing the longitudinal continuity of rivers, which is particularly important for diadromous fish that depend on obligatory migrations to freshwater reproduction (anadromous) or feeding areas (catadromous) to complete their life cycle. The upstream migration of the anadromous allis (Alosa ...
Effects of hydropeaking on the behaviour, fine-scale movements and habitat sele...
Rato, Ana; Alexandre, Carlos M.; Almeida, Pedro R.; Costa, José L.; Quintella, BernardoHydropeaking is widely known for changing the quantity and quality of the available habitat downstream of hydroelectric facilities, thus affecting all stages of fish life cycles. Hydropeaking impacts on salmonids are widely studied, but knowledge of its effects on cyprinids, which are dominant in Mediterranean areas, is scarce. In this study, 11 Iberian barbel (Luciobarbus bocagei, Steindachner 1864) were tagge...