Occurrence of Sea Lamprey, Petromyzon marinus , in a Newfoundland River, with Additional Records from the Northwest Atlantic
Information on adult and larval sea lamprey, Petromyzon marinus, from Terra Nova River, Newfoundland, provides the first documented occurrence of a spawning population of lamprey from this province. Sea lamprey captured on the spawning grounds in mid-July 1989 ranged in length from 530 to 687 mm. La...
| Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Canadian Science Publishing
1993
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/f93-143 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-143 |
| Summary: | Information on adult and larval sea lamprey, Petromyzon marinus, from Terra Nova River, Newfoundland, provides the first documented occurrence of a spawning population of lamprey from this province. Sea lamprey captured on the spawning grounds in mid-July 1989 ranged in length from 530 to 687 mm. Larvae collected in 1989 and 1990 ranged in length from 22 to 176 mm, and specimens were found distributed as far as 5 km below the only known spawning area. Length of larval specimens displaying signs of metamorphosis ranged from 135 to 170 mm. The length frequency distribution of sea lamprey larvae collected in 1990 is suggestive of multiple age classes. Information on the marine distribution of sea lamprey is provided from 24 records of captures in marine waters adjacent to Newfoundland. |
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