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Metamorphosis of the landlocked sea lamprey, Petromyzon marinus

Journal of the Fisheries Research Board of Canada

By:
and
DOI: 10.1139/f70-194

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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
DOI:
10.1139/f70-194
Volume:
27
Issue:
10
Year Published:
1970
Language:
English
Publisher:
NRC Research Press
Contributing office(s):
Great Lakes Science Center
Description:
12 p.
First page:
1735
Last page:
1746
Online Only (Y/N):
N
Additional Online Files (Y/N):
N