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EDP Foz Tua Otter (Lutra lutra) - Complementary Studies [2010]

Citation

da Fonte D, Santos-Reis M, Pedroso N, Chora S, Múrias T (2020). EDP Foz Tua Otter (Lutra lutra) - Complementary Studies [2010]. EDP. Sampling event dataset https://doi.org/10.15468/cdrwka accessed via GBIF.org on 2025-05-14.

Description

The dataset contains records of otter (Lutra lutra, Mammalia) collected in the Rivers Tua and Douro sub-basins and included in the Complementary Studies (2009-10) of the Environmental Impact Assessment of the Foz Tua Hydroelectric Dam, promoted by EDP – Energias de Portugal, S.A. Data were collected in February 2010 during field visits to 41 sampling points with favorable habitats in 16 10x10 km UTM squares in the river Tua sub-basin and in five sampling points in the river Douro, close to the the Tua mouth. The presence of individuals was recorded by direct observation of signs (scats).

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 the river Tua sub-basin and in a section of river Douro sub-basin near the tua's mouth (about 15 km to the south), in the municipalities of Carrazeda de Ansiães, Alijó, Vila Flor, Murça, Mirandela, Macedo de Cavaleiros, Valpaços, Vila Pouca de Aguiar, S. João da Pesqueira and Tabuaço.

Sampling

Sampling was designed to cover the course of river Tua and its main tributaries, from the spring to the mouth, and a portion of river Douro and the mouths of its tributaries located in the vicinity of river Tuah. The same grid of 10x10 km squares sampled in the last otter national census (Trindade et al., 1998) was used to sample the Tua's sub-basin. In each square, two sampling plots were randomly established in the selected water line(s). In each sampling point, a transect of 200-600 m was performed along the margins, looking for signs of presence (mostly scats) in suitable places (prominent stones and vegetation in the margins of the water line). Each plot was visited once in February 2010, in dry or light rain periods, to minimize the chance of leaching of the feacal material. The scats were identified "in loco" by expert researchers.

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 phylum, 1 class, 1 order, 1 family, 1 genus and 1 species.
  1. Chordata
    rank: phylum
  2. Mammalia
    rank: class
  3. Carnivora
    rank: order
  4. Mustelidae
    rank: family

Geographic Coverages

The data were collected in the river Tua sub-basin and in a section of river Douro sub-basin near the tua's mouth (about 15 km to the south), in the municipalities of Carrazeda de Ansiães, Alijó, Vila Flor, Murça, Mirandela, Macedo de Cavaleiros, Valpaços, Vila Pouca de Aguiar, S. João da Pesqueira and Tabuaço.

Bibliographic Citations

Contacts

David da Fonte
originator
position: General Coordinator
AGRIPRO - AMBIENTE
Rua Castilho, N.º 65 – 3.º Esq.
Lisbon
1250-068 LISBOA
PT
email: lisboa@agriproambiente.pt
Margarida Santos-Reis
originator
position: Scientific Coordinator
DBA-FCUL (Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa)
Edifício C2 - Piso 2, Campo Grande
Lisbon
1749-016 Lisboa
PT
Nuno Pedroso
originator
position: Technician
DBA-FCUL (Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa)
Suze Chora
originator
position: Technician
DBA-FCUL (Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa)
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
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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