Application of a tag parasite, Anisakis sp., indicates a common feeding migration for some genetically distinct neighbouring populations of herring, Clupea harengus
2007
Deurs, van M. | Ramkaer, K.,Danish Institute of Fisheries Research, Charlottenlund (Denmark). Dept of Marine Fisheries
Prevalence of the widely used tag parasite Anisakis sp. was applied to investigate whether the various spawning components, living in the Baltic Sea-North Sea transition zone, display any common features with respect to feeding migration patterns. This implies that herring (Clupea harengus) utilizing spawning grounds in the Limfjord and inner Danish waters engage in a northward feeding migration like their nearby neighbour, the Rugen Herring, instead of feeding locally or in the Baltic Sea. These results support the validity of the present division of management areas, where the Western Baltic Sea is managed under ICES Division IIIa (Kattegat and Skagerrak), even when the newly discovered population complexity is considered. It contributes to the debate on how population complexes can be sustained despite temporary mixing, where it support the idea that genetic divergence in herring population complexes can arise from colonization of unused spawning grounds and be sustained despite extensive temporal mixing by natal homing
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