thumbnail

Metamorphosis of the landlocked sea lamprey, Petromyzon marinus

Journal of the Fisheries Research Board of Canada

Out-of-print
By:
and

Links

  • The Publications Warehouse does not have links to digital versions of this publication at this time
  • Download citation as: RIS

Abstract

The external metamorphosis of the sea lamprey was divided into four stages, based primarily on the condition of the mouth: mouth reduced, mouth fused, mouth enclosed, and mouth elongated. During metamorphosis, the eye enlarged greatly, the snout and mouth region changed from a fleshy hood enclosing a sieve apparatus to a large sucking disc, the nasopore membrane and the branchial area shrank, the branchiopores changed in shape, the general color changed from dark brown and yellow to an intense blue-black dorsally and white ventrally, and the total length increased. Metamorphosis began in early to mid-July and did not take place after August. The duration of external metamorphosis was about 3 months for lampreys transforming under natural conditions. The mean lengths of metamorphosing lampreys from tributaries of lakes Superior and Michigan were 145 and 136 mm, respectively.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Metamorphosis of the landlocked sea lamprey, Petromyzon marinus
Series title:
Journal of the Fisheries Research Board of Canada
Volume
27
Issue:
10
Year Published:
1970
Language:
English
Contributing office(s):
Great Lakes Science Center
Description:
p. 1735-1746
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of the Fisheries Research Board of Canada
First page:
1735
Last page:
1746
Number of Pages:
11