Movhera - Elétricas do Norte, S.A. Foz-Tua: Fishes – Ecological Monitoring Program [2021-2023]
Citation
Cabral J A, Cortes R, Jesus J, Santos C, Lopes M, Pereira V, Bessa I, Assunção T, Gomes A, Múrias T (2024). Movhera - Elétricas do Norte, S.A. Foz-Tua: Fishes – Ecological Monitoring Program [2021-2023]. Movhera - Hidroelétricas do Norte, S.A.. Sampling event dataset https://doi.org/10.15468/nr6jy5 accessed via GBIF.org on 2024-12-06.Description
The dataset contains records of Fishes (Pisces) collected in the River Tua and its tributaries within the Ecological Monitoring Program (2021-2023) of the Exploration Phase of the Foz Tua Hydroelectric Dam, initially promoted by EDP – Energias de Portugal, S.A., subsequently (2021) transferred to Movhera Hidroelétricas do Norte, S.A. Data were collected in the spring/summer of 2021 to 2023 in 16 sampling stations distributed along the river Tua and its main tributaries (14 in lothic system and 2 in lenthic system), from the mouth to about 52 km upstream. The Ecological Monitoring Program (2021-2025) aims to evaluate the impacts of dam construction in the water quality of the river, after the construction process. The two lenthic stations were also used to assess water quality (biologic parameters),within the scope of the EU’s Water Framework Directive.Purpose
This dataset is part of a broader initiative whereby the company Movhera - Hidroelétricas do Norte S.A. will make available all biodiversity data collected during impact assessment and biological monitoring studies.
Sampling Description
Study Extent
The data were collected along the Tua lower valley (Northeast Portugal), up to 52 kms from the mouth, and in its main tributaries, in the municipalities of Alijó, Carrazeda de Ansiães, Murça, Vila Flor, Valpaços and Mirandela.Sampling
The capture methods employed were electric fishing, for lothic environments, and gill nets, for lenthic environments, in this case complemented with electric samples in the nearby banks. In the lothic environments, the fieldwork was carried out according to the standardized protocol established by the National Water Authority (INAG), namely the “Manual for the biological assessment of water quality in river systems according to the Water Framework Directive - Sampling and analysis protocol for fish fauna” (INAG, 2008). Thus, the specimens were captured alive by electric fishing, identified down to the species level and measured (total length). Sampling was carried out from downstream to upstream, with a strict adherence to the INAG protocol, which defines the minimum lenght of the section to be sampled (20 times the width of the river and never less than 100 m or, in rivers >30 m wide, a section in length 10 times the width of the river), with the electric equipment properly adjusted (voltage and amperage) to the electrical conductivity of the water (previously determined), thus allowing to increase the efficiency of the fishing while avoiding injuries and mortality of the fish. After capture, the fish were handled carefully and kept, until processing, inside boxes with plenty of water and oxygenation ensured by portable aerators. All measures were taken to avoid have densities raised inside the boxes, thus preserving the good physical condition of the fish until they were returned to the aquatic environment. Fish sampling in the reservoir also followed the directives of the National Authority for Water (INAG, 2009). Standardized gill nets (Standard CEN 14757:2005) were used in two sampling points, 200/300 m and 1200/1300 meters away from the dam (Stations 1 and 2, respectively). At each sampling points, 4 benthic nets and a surface pelagic net were cast, covering a total of 690 m2 (360 m2 of benthic and 330 m2 of surface netting). One surface and four depth classes were used (0-6 meters, 6-12 (m), 12-20 (m), 20-35 (m) and the fourth near the bottom, respectively), but in this dataset the benthic classes were amalgamated. In each sampling point in the reservoir, the monofilament were cast perpendicularly to the bank, and in order to cover all classes of existing depth, with the helpof a four-stroke motorized boat. The nests were released at the end of the day and collected at the beginning of the next day, staying in the water throughout the night, for an approximate period of 14 hours. After the launch of gill nets, placement locations were recorded using GPS. During sampling, the welfare of the captured specimens was ensured by depositing them in plastic buckets with portable oxygenators, which were kept in shelters at cover of direct sun exposure. The usual safety measures for working with electrofishing were strictly followed. The captured individuals were identified up to the species, and measured (total length in mm) with the aid of an ichthyometer. After these procedures, the native specimens were returned to their habitat in the vicinity of the capture sites with suitable conditions; at the request of the Institute of Conservation of Nature and Forestry (ICNF), exotic individuals were eliminated.Quality Control
All identifications were performed by qualified techniciansMethod steps
- To be completed
Taxonomic Coverages
The taxonomic coverage of this dataset spans 1 phylum, 1 class, 4 orders, 7 families, 15 genera and 15 species.
-
Animaliarank: kingdom
-
Chordatarank: phylum
-
Actinopterygiirank: class
-
Cypriniformesrank: order
-
Perciformesrank: order
-
Salmoniformesrank: order
-
Siluriformesrank: order
-
Cobitidaerank: family
-
Cyprinidaerank: family
-
Poeciliidaerank: family
-
Centrachidaerank: family
-
Percidaerank: family
-
Salmonidaerank: family
-
Ictaluridaerank: family
Geographic Coverages
The data were collected along the River Tua (Northeast Portugal) and its main tributaries, up to 52 kms from the mouth, in the municipalities of Alijó, Carrazeda de Ansiães, Murça, Vila Flor, Valpaços and Mirandela.
Bibliographic Citations
- INAG, I.P. 2008. Manual para a avaliação biológica da qualidade da água em sistemas fluviais segundo a Directiva Quadro da Água - Protocolo de amostragem e análise para a Fauna Piscícola. Ministério do Ambiente, do Ordenamento do Território e do Desenvolvimento Regional. Instituto da Água, I.P. -
- INAG, I.P. (2009) “Fish sampling in lakes/reservoir in Portugal with multi-mesh gillnets - Standard CEN EN 14757: 2005. Translation and guidance document.” Ministério do Ambiente, do Ordenamento do Território e do Desenvolvimento Regional. Instituto da Água, I.P. -
Contacts
João Alexandre Cabraloriginator
position: General Coordinator (2021-22)/Scientifc Coordinator (2022)
CITAB - Centro de Investigação e Tecnologias Agro-ambientais e Biológicas, Laboratório de Ecologia Aplicada, Universidade de Trás-os-Montes e Alto Douro
Quinta de Prados
Vila Real
5001-801 Vila Real
PT
email: jcabral@utad.pt
Rui Cortes
originator
position: Scientific Coordinator (2021)
CITAB - Centro de Investigação e Tecnologias Agro-ambientais e Biológicas, Laboratório de Ecologia Aplicada, Universidade de Trás-os-Montes e Alto Douro
Quinta de Prados
Vila Real
5001-801 Vila Real
PT
Joaquim Jesus
originator
position: Project Coordinator (2021-22)/General and Scientific Coordinator (2023)
CITAB - Centro de Investigação e Tecnologias Agro-ambientais e Biológicas, Laboratório de Ecologia Aplicada, Universidade de Trás-os-Montes e Alto Douro
Quinta de Prados
Vila Real
5001-801 Vila Real
PT
Cátia Santos
originator
position: Technician
CITAB - Centro de Investigação e Tecnologias Agro-ambientais e Biológicas, Laboratório de Ecologia Aplicada, Universidade de Trás-os-Montes e Alto Douro
Vila Real
PT
Marisa Lopes
originator
position: Technician
CITAB - Centro de Investigação e Tecnologias Agro-ambientais e Biológicas, Laboratório de Ecologia Aplicada, Universidade de Trás-os-Montes e Alto Douro
Vila Real
PT
Vítor Pereira
originator
position: Technician
CITAB - Centro de Investigação e Tecnologias Agro-ambientais e Biológicas, Laboratório de Ecologia Aplica
Vila Real
PT
Isabel Bessa
originator
position: Technician
CITAB - Centro de Investigação e Tecnologias Agro-ambientais e Biológicas, Laboratório de Ecologia Aplica
Vila Real
PT
Tiago Assunção
originator
position: Technician
CITAB - Centro de Investigação e Tecnologias Agro-ambientais e Biológicas, Laboratório de Ecologia Aplica
Vila Real
PT
André Gomes
originator
position: Technician
CITAB - Centro de Investigação e Tecnologias Agro-ambientais e Biológicas, Laboratório de Ecologia Aplica
Vila Real
PT
Tiago Múrias
metadata author
position: Researcher
CIBIO-InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto
Campus Agrário de Vairão
Vairão
4485-661 Vairão
PT
email: tdsantos@cibio.up.pt
Tiago Múrias
user
email: tdsantos@cibio.up.pt
Vítor Bertoluci
administrative point of contact
position: Manager
Movhera – Hidroelétricas do Norte, S.A.
Aproveitamento Hidroelétrico de Mirando do Douro
Miranda do Douro
Miranda do Douro 5210-183
PT