ヒメエゾボラNeptunea arthritica BERNARDIの移動様式, 特に繁殖と摂食活動との関連

概要

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The migration pattern of Neptunea arthritica in Usu Bay, Hokkaido, was studied based on its relationship with reproductive and feeding activities. Soon after hatching, recruits (0 year old) migrated from sites of egg mass deposition to places where food organisms were abundant. Immature individuals (1 and 2 years old) were distributed in and around locations of abundant food organisms in all seasons. In August, adults more than 3 years old were distributed ubiquitously in areas with abundant food. However, by September, they had begun to leave these areas gradually. Many adults aggregated at sites of egg mass deposition during the spawning period from May to June. In July just after spawning, they migrated rapidly from spawning sites to places with abundant food. The change of habitat by recruits and the distribution of immature individuals were strongly dependent on food, and the distribution and migration of adults were closely related to the two factors of reproductive and feeding activities.
日本生態学会の論文
1994-12-15