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EDP Baixo Sabor: Construction and Reservoir Filling Phases – Otter [2010-2014]

Citation

Mota P, Vingada J V, Ferreira J, Neto H M, Morgado R G, Silva J, Múrias T (2020). EDP Baixo Sabor: Construction and Reservoir Filling Phases – Otter [2010-2014]. EDP. Sampling event dataset https://doi.org/10.15468/6qbgut accessed via GBIF.org on 2025-07-19.

Description

The dataset contains records of the Otter (Lutra lutra) collected in the lower valley of River Sabor (NE Portugal), in the scope of the long-term Ecological Monitoring Program (PME) of the Baixo Sabor Hydroelectric Dams (AHBS), promoted by EDP – Energias de Portugal, S.A. This dataset includes results of surveys made in and around the area affected by the dam, from November 2010 to December 2014. Sampling was performed in transects distributed along the lower Sabor river valley (and some tributaries), and along the rivers Maçãs and Angueira, up to 42 km upstream. The presence and identity of the target species were assessed through the presence of faeces (spraints) and/or footprints of the target species.

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 data were collected in 49 5x5 km squares in the lower Sabor river valley, its tributaries and the rivers Maçãs and Angueira, from the river mouth up to 42 km upstream, in the municipalities of Torre de Moncorvo, Alfândega da Fé, Mogadouro and Macedo de Cavaleiros.

Sampling

Sampling was designed to cover the whole valley of the lower Sabor river, its tributaries, and the rivers Maçãs and Angueira. A total of 41 transects was established in the study area (1-3 per 5x5 km square). The transects had a minimum lenght of 200 m and, within this distance, the survey was stopped after the detection of the first confirmed sign of presence of the species (e.g., spraints, footprints). If there were no evidences of presence in the first 200 m, the transect was extended to a maximum of 600 m, after which, if the absence of signs persisted, the species was considered absent in the transect. Each transect was performed on foot, at dawn or sunset, by one or two observers, and the riverbed and its margins were carefully searched for signs of otter's presence (scats, footprints). All scats found were identified in the field and then taken to the laboratory for dietary analysis. The survey was based on indirect signs of otter presence, because individuals of the species are difficult to observe directly, and because the presence signs (spraints and footprints) can be unequivocally identified by experienced technicians.

Quality Control

All identifications were performed by qualified technicians

Method steps

  1. To be completed

Taxonomic Coverages

The taxonomic coverage of this dataset spans 1 class, 1 order, 1 familiy, 1 genus and 1 species.
  1. Chordata
    rank: phylum
  2. Mammalia
    rank: class
  3. Carnivora
    rank: order
  4. Mustelidae
    rank: family

Geographic Coverages

Data were collected along the lower Sabor river valley and its tributaries, in 49 5x5 km squares, from the river mouth up to 42 km upstream, in the municipalities of Torre de Moncorvo, Alfândega da Fé, Mogadouro and Macedo de Cavaleiros.

Bibliographic Citations

Contacts

Paulo Mota
originator
position: General Coordinator
BIOLINK - Consultoria Ambiental, Unipessoal, Lda
Praceta Caminho da Cruz, 9
Vila Nova de Gaia
4405-625 VN Gaia
PT
email: biolink.lda@gmail.com
José Vítor Vingada
originator
position: Scientific & Fieldwork Coordinator
BIOLINK - Consultoria Ambiental, Unipessoal, Lda
Praceta Caminho da Cruz, 9
Vila Nova de Gaia
4405-625 VN Gaia
PT
Joana Ferreira
originator
position: Technician
BIOLINK - Consultoria Ambiental, Unipessoal, Lda
PT
Hugo Manuel Neto
originator
position: Technician
BIOLINK - Consultoria Ambiental, Unipessoal, Lda
PT
Rui Guilherme Morgado
originator
position: Technician
BIOLINK - Consultoria Ambiental, Unipessoal, Lda
PT
Joana Silva
originator
position: Technician
BIOLINK - Consultoria Ambiental, Unipessoal, Lda
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
João Madeira
administrative point of contact
position: Manager
EDP - Energias de Portugal
Av. 24 de Julho, 12, Torre Nascente, Piso 4
Lisbon
1249-300 Lisboa
PT
email: Joao.Madeira@edp.pt
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