Article| Any: | 2022 |
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| Autor(s): | I. Farias, S. Pérez-Mayol, S. Vieira, P.B. Oliveira, I. Figueiredo, B. Morales-Nin |
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| Títol: | Ontogenetic spatial dynamics of the deep-sea teleost Aphanopus carbo in the NE Atlantic according to otolith geochemistry |
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| Revista: | DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS |
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| ISSN: | 0967-0637 |
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| Volum: | 186 |
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| Pàgines: | 103820 |
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| D.O.I.: | 10.1016/j.dsr.2022.103820 |
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| Web: | |
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| Resum: | The spatial distribution of deep-sea fishes is commonly related to major
water masses or regional circulatory features that in turn may reflect
differences in food-web structure and productivity. Aphanopus carbo
is a benthopelagic species that undergoes horizontal and vertical
migrations driven by spawning and by feeding, and for which a
large-scale clockwise migration around the NE Atlantic is hypothesized.
In this work, the adequacy of otolith microchemical composition used as tool to discriminate A. carbo
specimens caught at different areas was investigated. Furthermore,
potential birth areas and spatial pattern migration throughout the
species life cycle were studied. Trace element concentration (TEC) in
the otolith edge allowed the discrimination of the locations where
specimens were caught and supported the separation between the northern
and the southern distribution areas. The existence of two natal sources
was suggested based on the separation of otolith core TEC into two
groups. Longitudinal multivariate analyses applied to TEC data also
sustained the separation of the otoliths into two main groups, but the
mixing between them gives support to the species migratory hypothesis.
The acceptance of both southern and northern spawning grounds
and of migratory movements along the NE Atlantic in both northward and
southward directions implies changes to the current migratory hypothesis
that might be translated into new definitions of A. carbo stock structure and therefore fisheries management. |
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Personal relacionatBeatriz Morales NinSílvia Pérez MayolDepartaments relacionatsEcologia Marina
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