Variable recruitment and changing environments create a fluctuating resource: The biology of Anadara Uropigimelana (Bivalvia: Arcidae) on Tarawa atoll

The arcid bivalve Anadara uropigimelana (te bun) is the most important shellfish resource in the central atolls of Tungaru (former Gilbert Islands), with a yearly catch of ca. 1400 tons on South Tarawa alone. Species of Anadara s.s. are also important in artisanal shellfisheries on several central Pacific islands. Tungaru atolls lying in the highly productive zone of equatorial upwelling harbor dense te bun beds, while those