EDP Foz Tua: Fish – Complementary Studies [2011]
Citation
Pinheiro P, Godinho F, Oliveira J, Teixeira A, Murias T (2018). EDP Foz Tua: Fish – Complementary Studies [2011]. Version 1.3. EDP. Sampling event dataset https://doi.org/10.15468/cdbcwb accessed via GBIF.org on 2025-04-27.Description
The dataset contains records of freshwater fishes collected in the Tua river sub-basin and included in the Complementary Studies to the Environmental Impact Assessment of the Foz Tua Hydroelectric Dam, promoted by EDP – Energias de Portugal, S.A. Data were collected in August 2011, during field visits to 17 fixed stations. Sampling was made using electrofishing, and it targeted all fish species. The following species were recorded: Achondrostoma oligolepis, Cobitis calderoni, Gambusia holbrooki, Lampetra planeri, Lepomis gibbosus, Luciobarbus bocagei, Pseudochondrostoma duriense, Salmo trutta subsp. fario, Squalius alburnoides, Squalius carolitertii.Purpose
This dataset is part of a broader initiative whereby the company EDP - Energias de Portugal S.A. will made available biodiversity data collected during impact assessment and biological monitoring studies.
Sampling Description
Study Extent
The study was carried out in 17 fixed stations covering the upper Tua (4 stations), Tinhela (2 stations), Tuela (1 station), Rabaçal (3 stations) and seven minor tributaries (Curros, Carvalhais, Macedo and Mentes, Rebousa, Milhais and Flagosa, 1 station each). Sampling was designed to sample areas of river with suitable habitat for Cobitis calderoni and Anguilla anguilla, covering the Tua river sub-basin. The maximum distance between stations was 5 km along the river Tua and its small tributaries up to the lower stretches of rivers Tuela and Rabaçal. Two additional stations located in these rivers were farther apart, but they were used because they contained suitable habitats for the species. Each station was sampled once in the summer of 2011 (23 to 30 of August).Sampling
Samples were taken during the day by electro-fishing, by a team of two or three elements, using a portable device with a gasoline generator set (for safety reasons used as a fixed element), with pulsed direct current output (Hans Grassl ELT 60II-HI, 500-1000 V, 1300W), or a portable rechargeable battery pack for dorsal transport with continuous pulse output (Hans Grassl IG200 / 2C; 400-1000 V; <70 Hz). The fishing was carried in the opposite direction of the current current. In the course of the work, 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 individuals of all taxa caught were identified up to the species and counted. In the specific case of Cobitis calderoni, the total length (in mm) was measured 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. A brief environmental characterization of each station was made “in situ”. The parameters used were: (a) abundance (n./ha) of exotic species present, (b) width (m) of the waterline, (c) altitude, (d) area (km2) of the basin, (e) distance (km) to the river springs, (f) slope (‰), (g) average yearly temperature (º), (h) average temperature of July (º), (i) precipitation (mm), (j) predominant substrate (mud, sand, gravel, grit, stones, blocks, rock), (k) depth (m) and (l) current velocity (m/s).Quality Control
All fish was identified by experienced researchers with a deep knowledge of the local icthyofauna.Method steps
- To be completed
Taxonomic Coverages
The taxonomic coverage of this dataset spans 1 phylum, 2 classes, 5 orders, 6 families and 10 species. All individuals were identified to the species level.
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Animaliarank: kingdom
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Chordatarank: phylum
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Actinopterygiirank: class
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Cephalaspidomorphirank: class
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Cypriniformesrank: order
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Petromyzontiformesrank: order
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Salmoniformesrank: order
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Perciformesrank: order
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Cyprinodontiformesrank: order
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Cobitidaerank: family
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Cyprinidaerank: family
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Petromyzontidaerank: family
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Salmonidaerank: family
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Centrarchidaerank: family
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Poeciliidaerank: family
Geographic Coverages
The data was collected at 17 field stations along the valleys of rivers Tua, Tinhela, Tuela and Rabaçal (Northeast Portugal, Europe), within the municipalities of Alijó, Carrazeda de Ansiães, Murça, Mirandela, Macedo de Cavaleiros and Vinhais
Bibliographic Citations
Contacts
Paulo Pinheirooriginator
position: Technician
Aqualogus - Engenharia e Ambiente, Lda
Rua do Mar da China, N.º 1 Escritório 2.4, Parque das Nações
Lisboa
1990-137
PT
email: ppinheiro@aqualogus.pt
Francisco Godinho
originator
position: Technician
Aqualogus - Engenharia e Ambiente, Lda
PT
João Oliveira
originator
position: Technician
Aqualogus - Engenharia e Ambiente, Lda
userId: http://orcid.org/0000-0002-7048-5096
Amílcar Teixeira
originator
position: Technician
Aqualogus - Engenharia e Ambiente, Lda
userId: http://orcid.org/0000-0001-5336-1174
Tiago Murias
metadata author
position: Rsearcher
CIBIO-InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto
Campus Agrário de Vairão
Vairão
4485-661
PT
email: tdsantos@cibio.up.pt
Paulo Pinheiro
user
position: Technician
Aqualogus ~Engenharia e Amblente, Lda
Rua do Mar da China, N.º 1 Escritório 2.4, Parque das Nações
Lisboa
1990-137 Lisboa
PT
email: ppinheiro@aqualogus.pt
João Madeira
administrative point of contact
position: Manager
EDP - Energia de Portugal
Av. 24 de Julho, 12, Torre Nascente, Piso 4
Lisbon
1249-300 Lisboa
PT
email: Joao.Madeira@edp.pt