Abstract
The aim of this study is to develop an automated electro-piearcing injector for fish eggs which is able to import cryoprotectants efficiently. To align the sufficient number of fish eggs, an experimental device that allows fish eggs flow into each duct is required. The ducts were designed considering the calculated flow rates in the channels of the device. The existence of an egg alignment was inferred especially from the flow ratio of the branching part caused by the occlusion of fish eggs. Concerning both high and low occlusive duct, the experiments were conducted after producing a duct that arrays three fish eggs. By increasing the occlusive of the ducts by fish eggs, the calculating results suggested that the high occlusivity at the duct by egg widens optimal design range, because of high shunt flow ratio at the branch.
