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

  • Quintella B
  • Andrade N
  • Almeida P
  • 27

    Readers

    Mendeley users who have this article in their library.
  • 38

    Citations

    Citations of this article.

Abstract

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.

Author-supplied keywords

  • Ammocoete
  • Length increment
  • Length-frequency data
  • Metamorphosis
  • Statoliths

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • B. R. Quintella

  • N. O. Andrade

  • P. R. Almeida

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free