Abstract: A larval table for the collection of the early life stages of fish; i.e., eggs, larvae and juveniles as well as invertebrate macrozooplankton is disclosed. The larval table assembly includes a head or water delivery module, two or more screen separation modules, and a collection box module and concentration receptacle. The larval table is utilized in the collection of specimens where it is desired to recover the specimens alive. This is accomplished by reducing the flow velocity of the specimen carrying liquid which flows through the larval table. In addition, the collection box module and concentration receptacle eliminate the need for manual removal of the specimens from the larval table. The modular arrangement of the larval table allows modification of the table to accommodate varying flow rates of liquid to be sampled by adding additional screen separation modules, as needed.

Abstract: An automated entrainment abundance sampler for the collection of ichthyoplankton specimens and its operation is disclosed. An inverted conical screen or net is utilized to collect specimens from water supplied by a suitable pump. After a set time period, the collected specimens are further concentrated in a secondary concentrator and transferred to a sample container. The conical screen is rinsed to insure that all the specimens are transferred to the secondary collector which is, in turn, rinsed to further insure that all the specimens are carried to the sample container. A suitable control system is provided to allow the sampler system to operate automaticaly in the collection of specimens over a preselected period of time.