comparison of otolith microchemistry and otolith shape analysis for the study of spatial variation in a deep-sea teleost, Coryphaenoides rupestris

The study of the morphological and chemical characteristics of otoliths have recently been proposed as complementary tools for fish stock identification. However, their effectiveness remains to be fully assessed, especially in species whose life history is still poorly understood. The relative effic...

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Bibliographic Details
Published in:Environmental biology of fishes 2010-11, Vol.89 (3-4), p.591-605
Main Authors: Longmore, Craig, Fogarty, Kate, Neat, Francis, Brophy, Deirdre, Trueman, Clive, Milton, Andrew, Mariani, Stefano
Format: Article
Language:English
Subjects:
Agnatha. Pisces
Animal and plant ecology
Animal Systematics/Taxonomy/Biogeography
Animal, plant and microbial ecology
Animals
Autoecology
Barium
Biochemistry
Biological and medical sciences
Biomedical and Life Sciences
Comparative studies
Coryphaenoides rupestris
Deep sea
Discriminant analysis
Elliptic Fourier Analysis
Environment
Fish
fisheries management
Fourier analysis
Freshwater & Marine Ecology
Fundamental and applied biological sciences. Psychology
ICP-MS
Life history
Life Sciences
Lithium
Manganese
Nature Conservation
North Atlantic
Otoliths
Population structure
Population studies
Research methodology
Roundnose Grenadier
Stock structure
Teleostei
trace elements
Vertebrata
Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
Zoology
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Summary:The study of the morphological and chemical characteristics of otoliths have recently been proposed as complementary tools for fish stock identification. However, their effectiveness remains to be fully assessed, especially in species whose life history is still poorly understood. The relative efficiency of otolith microchemistry and otolith shape analysis in discriminating samples of the deep-sea macrourid Coryphaenoides rupestris collected in different areas in the North Atlantic was examined. Otolith microchemistry based on LA/ICP-MS found significant differences in the concentrations of lithium, manganese and barium among sample sites. This allowed for very high classification accuracy (92%), when using discriminant function analysis. Otolith shape analysis based both on linear shape measurements and elliptical fourier analysis revealed a contrasting weak discrimination, with only 43% classification success. Otolith microchemistry appears to be a more effective tool in identifying individual fish from different locations. The implications for the study of population structure are discussed taking into account the limitations of the methodologies employed.
ISSN:0378-1909
1573-5133
DOI:10.1007/s10641-010-9674-1