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Survival and tag retention of Pacific lamprey larvae and macrophthalmia marked with coded wire tags

North American Journal of Fisheries Management

By:
, ,
DOI: 10.1577/M06-074.1

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Abstract

We examined the survival, tag retention, and growth of Pacific lamprey Lampetra tridentata larvae and macrophthalmia marked with standard-length decimal coded wire tags and exposed to two levels of handling stress. The survival of marked individuals did not differ from that of unmarked individuals at either life stage for the duration of the experiment (56 d). Tag retention was 100% for all treatment combinations except larvae that were handled frequently (93 ?? 3%). The majority of tag loss occurred within 28 d of marking, and no tag loss was observed between 42 and 56 d after marking. The individuals that lost tags were among the smallest marked, and a logistic regression model indicated a relationship between larva length and the probability of tag retention. Size of larvae (length and mass) and macrophthalmia (mass) decreased over the duration of the experiment; however, changes in size were systematic among treatment combinations, indicating that factors other than tagging or handling affected growth. These data indicate that coded wire tags may be useful for field-based studies of Pacific lamprey larvae and macrophthalmia.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Survival and tag retention of Pacific lamprey larvae and macrophthalmia marked with coded wire tags
Series title:
North American Journal of Fisheries Management
DOI:
10.1577/M06-074.1
Volume
27
Issue:
1
Year Published:
2007
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
North American Journal of Fisheries Management
First page:
96
Last page:
102
Number of Pages:
7