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- Title
Evaluation of a stable-isotope labelling technique for mass marking fin rays of age-0 lake sturgeon.
- Authors
Smith, K. T.; Whitledge, G. W.
- Abstract
The effectiveness of marking age-0 lake sturgeon, Acipenser fulvescens Rafinesque, pectoral fin rays with a stable strontium isotope was evaluated. Age-0 lake sturgeon were reared in water spiked with 0 (control), 25, 50 or 100 μg LSrC0 for 10 and 24 days; fish from each treatment group were retained for up to 120 days post-labelling to assess mark retention. Enriched-isotope marks imparted to fin rays were distinct from fin ray Sr/Sr ratios of control fish immediately following marking, with the 100 μg LSrCO treatments consistently yielding the highest rate of marking success (83-92%). Lower marking success (25-69%) was observed with the 25 and 50 μg LSrCO treatments. Isotopic marks in fin rays were retained for 120 days post-labelling. Immersion marking of juvenile fish pectoral fin rays with distinct strontium isotope ratios is possible and does not require sacrificing fish to check for marks.
- Subjects
FISHERY management; HATCHERY fishes; STABLE isotopes; CHIRONOMIDAE; LAKE sturgeon
- Publication
Fisheries Management & Ecology, 2011, Vol 18, Issue 2, p168
- ISSN
0969-997X
- Publication type
Article
- DOI
10.1111/j.1365-2400.2010.00771.x