Coparcenary rights determine fluctuating family shares; ascertainment occurs on partition, affecting ownership and acquisition capacity. Coparcenary is a Hindu law corporate-family unit of male birthright members who can acquire, hold and dispose of family property within legal limits; management and business may be conducted by the manager or consenting members. A coparcener's interest arises by birth but is indeterminate until partition, since shares fluctuate with births and deaths; under Mitakshara there is community of ownership and unity of possession and the family property identity endures even if only one male member remains.