Summer survival and habitat characteristics of a threespine stickleback (Gasterosteus aculeatus L.) Southern European population

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

Alexandre, CM (Autor) Outra; Pedro Almeida (Autor) Outra

Revista

Título: Limnetica

Vol. 28

Páginas: 125-137

ISSN: 0213-8409

Editora: Associacion Espanola de Limnologia

Indexação

ISI Web of Knowledge - 3 Citações

Scopus - 3 Citações

Outras Informações

ID Authenticus: P-003-JTK

Abstract (EN): In April 2006, the relationships between the spatial distribution of a threespine stickleback (Gasterosteus aculeatus L.) southern European population during breeding season and the environmental parameters were investigated in the Almansor River, a Mediterranean type river in Portugal. This species distribution and survival rate during the previous summer period were also taken into account in this study. Despite the high mortality suffered by the juvenile in the upstream pools summer pools, the threespine stickleback adults continue to prefer this river stretch for spawning. In this period, male sticklebacks showed preference for sites that were rich in fish species and vegetation, where there is a greater protection against environmental fluctuations and anthropogenic pressures. Male distribution was also dependent on predation risk, for they were abundant at sites with fewer potential predators. The abundance of females wits positively related to male abundance, showing that, above all other variables, male nesting site was the main factor influencing their distribution, during breeding season.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13