Proceedings, Volume 146, 2026

Introduction: Professional inland fisheries in Portugal remain poorly characterized despite their ecological, social, and territorial relevance. Objective: The objective of this study is to examine the evolution of the biomass catched by inland profe...

Introduction: A diverse ichthyofauna is supported by the Lima River in northern Portugal. Despite its ecological significance, Ramsar-protected wetlands status and Natura 2000 site, the system remains among the least studied in the Iberian Peninsula....

Introduction: The Lebranche mullet (Mugil liza) is a commercially important fish species in southeastern and southern Brazil, which serves as the primary spawning ground for the Southern stock that supports the Brazilian industrial seine fleet. Howev...

Introduction: Records of rare, deep-water, and non-indigenous fish species are of growing interest in marine biodiversity research because they refine regional inventories, improve taxonomic knowledge, and provide valuable evidence of ecological chan...

Introduction: The 3 Rs principle advocates developing alternative, biologically relevant models. Thus, 3D fish liver in vitro models have been increasingly used for ecotoxicological studies. We previously optimized spheroids from the rainbow trout no...

Introduction: Otoliths have been widely used in recent years as tracers of fish life history, ranging from visual aging to chemical analyses that reconstruct environmental conditions, migration patterns, and metabolic changes. Yet, Iberian endemic or...

Introduction: Portugal is, historically, one of the countries with the highest fish consumption worldwide, reflecting strong cultural and dietary traditions. However, shifts in food systems, economic conditions, and globalization may have altered its...

Introduction: Fragmentation is potentially the most significant pressure affecting European rivers. With the projected number of barriers exceeding 1 million for the EU alone, the quantification of river network connectivity is of extreme practical i...

Introduction: The upper Arlanza River (Duero Basin, Burgos, Spain) hosts a genetically distinct local lineage of brown trout (Salmo trutta fario), the “Arlanza strain”, largely free from hatchery-derived introgression, alongside other nat...

This study presents the revision of the Rabaçal River Recreational Fishing Area Management Plan (ZPL), implemented in 2020, aiming to evaluate its effectiveness and identify the need for adjustments after five years. The study area includes pa...

Introduction: Fish stock identification and delineation are fundamental requirements for preventing local depletion and promoting the sustainable exploitation of marine resources. The blackspot seabream, Pagellus bogaraveo, is the most commercially v...

Introduction: The Atlantic bluefin tuna Thunnus thynnus (ABFT) is a large pelagic apex predator with adaptations for a life of ceaseless swimming during long-distance oceanic migrations. The environmental physiology and energetics of tunas have inter...

Increasing ocean temperatures are expected to increase the energy needs of marine organisms, therefore increasing food demand to sustain their metabolism. However, food is limited in the aquatic environment and reduced availability may be intensified...

Introduction: Elasmobranchs are key components of marine ecosystems but are particularly vulnerable to fishing pressure due to their life-history traits, including slow growth, late maturity, and low fecundity. The Gulf of Cádiz supports a div...

Introduction: The sea lamprey (Petromyzon marinus) is an anadromous jawless fish that migrates between marine and freshwater environments, spawning once in rivers before dying. It is distributed along both coasts of the North Atlantic. In Asturias (n...

Emerging contaminants constitute a growing pressure on river ecosystems due to their persistence, chemical diversity, and ecotoxicological effects. The objective of this study was to analyze the presence of these compounds in muscle tissue across a r...

The genus Sebastes comprises around 110 species of marine fish. In Japan, the Sebastes inermis complex includes three sympatric species (S. cheni, S. inermis, and S. ventricosus), and morphotypes that cannot be assigned to any of these three species....

Introduction: The entry and accumulation of fish inside the suction tubes of hydroelectric power plants can pose risks to these animals. To protect ichthyofauna, repulsion systems employing diverse methodologies have been developed. Objective: The ma...

Biological invasions and freshwater biodiversity loss are two of the most pressing global conservation challenges yet their interaction during the earliest stages of invasion remains poorly understood. Iberian freshwaters rank among Europe’s mo...

The South American silver croaker, Plagioscion squamosissimus, holds significant importance for the artisanal fisheries operating in the sub-middle and lower courses of the São Francisco River, located in northeastern Brazil. Its complex horiz...

Introduction: Fish consumption in Portugal (53.61 kg/year) and Spain (40.68 kg/year) remains the highest in the European Union, highlighting the nutritional and economic relevance of small pelagic species. However, fish composition is highly dynamic...

Introduction: Biological invasions are a major driver of biodiversity loss, particularly in freshwater ecosystems. The Iberian Peninsula, a hotspot of endemic diversity, is increasingly threatened by invasive predatory fish, which may exert higher pr...

Introduction: Fish species represent 25% of all vertebrates across the globe and are one of the most threatened animal groups. At least 40% of the fish fauna occurs in rivers for part of their life cycle. European rivers are home to more than 600 fis...

Introduction: The most common method for controlling invasive fishes is mechanical removal, although it is time-consuming and operationally demanding. In Portugal, commercial inland fisheries are permitted, but the extent to which they could represen...

Introduction: The European catfish (Silurus glanis) has expanded rapidly across Europe, significantly impacting native freshwater biodiversity. Despite its well-documented ecological and economic effects as a top predator, reproductive biology data f...

Introduction: Sediment flushing is widely used to recover storage capacity and maintain outlet functionality in Mediterranean reservoirs, but it can also generate short downstream pulses of suspended sediment, oxygen depletion, and ammonia that may t...