Metamorphosis of the landlocked sea lamprey, Petromyzon marinus
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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.
| 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 |
| Google Analytic Metrics | Metrics page |