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

• Type: Article in International Scientific Journal
• Date: 2003

Authors

Quintella, BR (Author) Other; Andrade, NO (Author) Other; Pedro Almeida (Author) Other

Journal

Title: Ecology of Freshwater Fish

Vol. 12

Pages: 286-293

ISSN: 0906-6691

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 36 Citations

Scopus - 46 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8