Distribution, larval stage duration and growth of the sea lamprey ammocoetes, Petromyzon marinus L., in a highly modified river basin

• Tipo: Artigo em Revista Científica Internacional
• Data: 2003

Autores

Quintella, BR (Autor) Outra; Andrade, NO (Autor) Outra; Pedro Almeida (Autor) Outra

Revista

Título: Ecology of Freshwater Fish

Vol. 12

Páginas: 286-293

ISSN: 0906-6691

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 36 Citações

Scopus - 46 Citações

Outras Informações

ID Authenticus: P-000-E7N

DOI: 10.1046/j.1600-0633.2002.00030.x

Abstract (EN): Larval stage duration of the sea lamprey, Petromyzon marinus, in the River Mondego is estimated to last for 4 years. The number of annuli provides reliable age estimates when compared with length-frequency distributions analysis. The growth rate of the sea lamprey ammocoetes displays strong seasonal patterns, and reaches its highest value during the first 2 years of larval stage. About 69% of the length increment between hatching and metamorphosis is attained at the end of the second year. There is a longitudinal gradient associated with ammocoete distribution along the river. Relative abundance of ammocoetes decreases downstream from the Acude-Ponte dam, the first obstruction encountered by the adult sea lampreys in their upstream spawning migration along the River Mondego.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8