Seasonal Dynamics of Intensity of Fertility and Reproduction in Circeis Armoricana (Saint-Joseph, 1894) (Polychaeta)
Since spirorbid polychaete Circeis armoricana is a main pest on kelp farms in Russia, its breeding was studied throughout one year. Large broods occurred in tubes with coil diameters of 1.9 mm, made by worms 2–3 months old. Worms with broods increased from 9.4% in February to 96.7% in June then gradually declined to 2.5% in December. The average number of embryos in a brood changed from 79 in January to 160.8 in June. Receiving data suggest that brood size was not closely related to tube size.
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Document Type: Research Article
Publication date: 1997-03-01
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