Plyuscheva M., Martin D.1, Britayev T.2 2004. Population ecology of two simpatric polychaetes, Lepidonotus squamatus and Harmothoe imbricata (Polychaeta, Polynoidae), in the White Sea // Invertebrate Zoology. Vol.1. No.1: 65–73 [in English].

1 Centre d’Estudis Avançats de Blanes (CSIC), carrer d’accés a la Cala Sant Francesc 14, 17300 Blanes (Girona), Catalunya (Spain).

2 A.N. Severtzov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky pr. 33, Moscow 117071, Russia.

ABSTRACT: Under the critical environmental conditions of the White Sea, Lepidonotus squamatus and Harmothoe imbricata coexist in the same habitat, often showing recurrent alternations in dominance. L. squamatus is a long-living, slow growing broadcast spawner, while H. imbricata is a short-living and quick growing species, with complex reproductive behaviour. These different life strategies may allow them to respond in a different way to the environmental limitations of the study site, this likely being the most appropriate explanation to the observed alternation in dominance.

KEY WORDS: Population dynamics; growth; scale-worms; the White Sea.

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