Traveling around Cape Horn: Otolith chemistry reveals a mixed stock of Patagonian hoki with separate Atlantic and Pacific spawning grounds
作者： Pia C. Schuchert , Alexander I. Arkhipkin , Alan E. Koenig
DOI: 10.1016/J.FISHRES.2009.10.012
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摘要: Abstract Trace element fingerprints of edge and core regions in otoliths from 260 specimens Patagonian hoki, Macruronus magellanicus Lonnberg, 1907 , were analyzed by LA-ICPMS to reveal whether this species forms one or more population units (stocks) the Southern Oceans. Fish caught on their spawning grounds Chile feeding Falkland Islands. Univariate multivariate analyses trace concentrations otolith edges, which relate adult life fish, could not distinguish between Atlantic (Falkland) Pacific (Chile) hoki. Cluster edges produced three different clusters all sample areas indicating high mixture stocks. analysis cores, relating juvenile larval stages, two separate mainly distinguished 137Ba concentrations. The results suggest that hoki is a highly mixed fish stock with at least around South America.
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