Autor(es):
Almada, Frederico ; Abecasis, David ; Villegas-Ríos, David ; Henriques, Sofia ; Pais, Miguel Pessanha ; Batista, Marisa Isabel ; Costa, Bárbara Horta e ; Martins, Joana ; Tojeira, Inês ; Rodrigues, Nuno Vasco ; Araújo, Ricardo ; Souto, Miguel ; Alonso, Hany ; Falcón, Jesús M. ; Henriques, Filipe ; Catry, Paulo ; Cabral, Henrique ; Biscoito, Manuel ; Almada, Vitor C.
Data: 2015
Identificador Persistente: http://hdl.handle.net/10451/41018
Origem: Repositório da Universidade de Lisboa
Assunto(s): Biogeography; dispersal capability; ichthyofauna; Macaronesia; Selvagens Islands
Descrição
The Selvagens Islands are located in the northeastern Atlantic between the Canary Islands and Madeira Island. As a result of their small size, remote location and harsh sea conditions only a few studies have been conducted to describe their marine species diversity. We were able to identify 29 new coastal fish species, an increase of 33% in the ichthyofauna described for these islands (n = 88). There is a prevalence of species with tropical affinities and only 2.3% (n = 2) are endemic to Macaronesia. Considered a stepping-stone colonization vector from the nearest continental shore, as proposed by other authors for this region, the Selvagens Islands host 34.1% of the ichthyofauna described for the much larger Canary Islands (nspecies = 258, submerged area nSelvagensIs. = 2.3%) and 47.3% of the ichthyofauna described for the more distantly located Madeira Island (nspecies = 186, submerged area nSelvagensIs. = 17.9%). Interestingly, 6.8% (n = 6) of the species failed to bridge the gap between the Selvagens Islands and Madeira Island. Data collected so far showed no trend toward an increasing number of species with high dispersal capability. The Selvagens Islands are an example of a high coastal species diversity occurring even in very small areas of the northeastern Atlantic Ocean.
