http://hdl.handle.net/10174/14286 2026-04-06T11:47:04Z http://hdl.handle.net/10174/37435 Title: Neobiota 2024 Book of Abstracts Authors: Anastácio, Pedro; Brandão, Pedro; Chainho, Paula; Trindade, Helena; Ribeiro, Filipe Abstract: The Neobiota 2024 Conference, held from 3 to 7 September 2024 in Lisbon, Portugal, was a significant gathering organized by the MARE – Marine and Environmental Research Centre, in collaboration with the Faculty of Sciences of the University of Lisbon and the University of Évora. The event, led by conveners Pedro Anastácio, Paula Chainho, and Filipe Ribeiro, brought together the Biological Invasions group at MARE and numerous experts from around the world to address key issues related to biological invasions. More than 400 participants from 47 countries attended, making it a diverse and dynamic forum for exchange. The conference program featured 199 oral communications, 6 plenary talks, and 163 poster presentations. It was supported by a dedicated team, including 34 members of the Scientific Committee, 20 members of the Organizing Committee, and 18 volunteers. Attendees also had the chance to engage in 8 workshops and take part in 3 technical visits, with the support of 13 sponsors. The Neobiota 2024 Abstract Book captures the essence of this event, compiling a wide range of research contributions that reflect the latest scientific advancements and collaborative efforts in the study of biological invasions. 2024-01-01T00:00:00Z http://hdl.handle.net/10174/35159 Title: Migration Patterns and Behaviour of Trout (Salmo trutta L.) in the Southern Limit of the Species Distribution Authors: Silva, Sara; Alexandre, Carlos; Ribeiro, Ana; Domingues, Andreia; Rato, Ana; Joana, Pereira; Mateus, Catarina; Quintella, Bernardo; Almeida, Pedro Editors: Teodorico Correia, Alberto Abstract: The 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, and relate them with the environmental factors to which the species is exposed. Biotelemetry represents an important tool to obtain temporal and spatial specific details about the behaviour of target species and, in this work, we used a set of complementary techniques, namely acoustics, radio and PIT telemetry. A total of 114 trout specimens were tagged with PIT-tags, to be identified in future recaptures or detected at an antenna installed at Coimbra dam fish pass. From these, 18 were also tagged with Dual Mode transmitters, that include radio and acoustic telemetry signals, allowing to track the species’ movements from the estuary to the upstream freshwater sections. Results show the existence of a migratory peak between November and January that coincides with the reproduction season, while reinforcing the importance of Alva River to spawning S. trutta, one of the main tributaries in the study area. River fragmentation in the study area, particularly in the tributaries, is still limiting the vital area of the tracked individuals, although recent restoration actions provided easier access to some important areas in this river for distinct trout life-stages. This study aims to improve the knowledge of southern European trout populations, contributing to enhancing efforts for restoring and managing these populations inhabiting areas under severe climate change effects. 2022-06-16T23:00:00Z http://hdl.handle.net/10174/35158 Title: Genetic Structure of Meagre (Argyrosomus regius) in Portugal: Implications for Fisheries Management Authors: Almeida, Rita; Mateus, Catarina; Alves, Maria Judite; Marques, João; Pereira, Joana; Prista, Nuno; Cabral, Henrique; Almeida, Pedro; Bernardo, Quintella Editors: Teodorico Correia, Alberto Abstract: The meagre Argyrosomus regius (Asso, 1801) is a marine migratory species with a wide distribution range encompassing the north-eastern and central-eastern Atlantic Ocean, the Mediter ranean Sea, and the western Black Sea. A. regius is one of the largest overexploited sciaenids, being a valuable resource for aquaculture and fisheries along its distribution range. The Iberian Peninsula is considered an intermediate area between two genetically distinct groups of A. regius populations, one in the north-eastern Atlantic Ocean and one in the eastern Mediterranean Sea. The current knowledge on the population dynamics and distribution of this species has been derived from commercial and recreational fishery catches; therefore, little is known about the importance of the Iberian Peninsula for the species’ management and conservation. The aim of this study is to evaluate the A. regius population genetic structure along the Portuguese coast taking into consideration the north-eastern Atlantic region. To achieve this goal, the genetic diversity, differentiation, populational structure and demographic history of A. regius populations along the Atlantic coast were analyzed using 15 microsatellite loci. The detected populational structure indicates that A. regius species in Portugal are divided into two distinct stocks, one across the Portuguese western coast, possibly related to the Tagus spawning and nursery area, and another one on the southern coast. This study reveals the need for A. regius-specific fishery management plans in Portugal and underlines the importance of considering the genetic structure of A. regius populations when delineating such management plans. 2022-06-16T23:00:00Z http://hdl.handle.net/10174/35157 Title: Evidence of High Levels of Gene Flow in a Widely Distributed Catadromous Species: The Thin-Lippedgrey Mullet Authors: Pereira, Esmeralda; Catarina, Mateus; Maria Judite, Alves; Rita, Almeida; Joana, Pereira; Bernardo, Quintella; Pedro, Almeida Abstract: The thin-lipped grey mullet Chelon ramada (Risso, 1827) is a catadromous species that is distributed along the Northeast Atlantic, from the Norwegian coastline down to Mauritania, on the African coast (20–60◦ N, 18◦ E–42º W), and displays diverse patterns of habitat use and migratory behaviors. This widely distributed species is observed in large shoals throughout coastal areas and in brackish and freshwater environments, yet no previous studies have addressed the population's genetic structure. To study the patterns of genetic variation, gene flow and connectivity in the C. ramada distribution range), 457 fin clips sampled from 14 locations (Portuguese coast, Bay of Biscay, North seas, Celtic sea, Western Mediterranean and Eastern Mediterranean) were genotyped using 11 microsatellite DNA markers. No significant genetic differentiation among locations or geographic clustering of samples was observed, which points towards the existence of a unique genetic group. The results suggest strong gene flow from the Western Mediterranean to the Portuguese coast (Nm = 1) and vice versa (Nm = 0.87). The Portuguese coast has displayed the highest values of gene flow with all the sampling sites ([0.4–0.6]) whereas Northeast Atlantic coast and Eastern Mediterranean maintained symmetrical lower values of gene flow that ranged between [0.20–0.30]. The present study provides evidence that high levels of gene flow are maintained within the distribution range, contributing to the existence of a panmictic population. 2022-06-16T23:00:00Z