Details

Autor(en) / Beteiligte

• Bekkevold, Dorte
• Clausen, Lotte A. W.
• Mariani, Stefano
• André, Carl
• Christensen, Tina B.
• Mosegaard, Henrik

Titel

Divergent origins of sympatric herring population components determined using genetic mixture analysis

Ist Teil von

• Marine ecology. Progress series (Halstenbek), 2007-05, Vol.337, p.187-196

Ort / Verlag

Inter-Research

Erscheinungsjahr

2007

Quelle

Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals

Beschreibungen/Notizen

• The origin and reproductive interactions of sympatric, spatially separated spawning components of Atlantic herringClupea harengushave received long-standing interest. In the western Baltic most herring spawn in spring, with smaller components spawning in winter. We used microsatellite DNA analysis and a novel Bayesian genetic mixture analysis approach to compare the genetic relationships of 2 western Baltic winter-spawning aggregations with those of their sympatric spring-spawning components, and combined information for genetic markers and morphological traits (otolith-determined hatching time and growth relationships) to test alternative hypotheses for the origin of winter spawners. We show that genetic relationships between sympatric components differ greatly between the 2 locations; the results indicate that winter spawning has arisen via 2 fundamentally different processes: (1) as a result of ‘spawning-time switching’ in a local spring-spawning component and (2) via 1 or more founder events from an extant winter-spawning population into an area otherwise dominated by spring spawners.