Abstract: An imaging plate includes a plurality of wells individually accommodating little fishes, and the little fishes inside the wells are imaged from bottom portions of the wells. In order to adjust imaging posture or imaging positions of the little fishes inside the wells, an imaging little fish management device includes a water unit which supplies and discharges water into and from each well of the imaging plate. The water inside each well flows through a discharge hole provided laterally at a lowermost portion of each well. The water unit is also used to breed the little fishes of the wells of the imaging plate.

Abstract: An imaging plate includes a plurality of wells individually accommodating little fishes, and the little fishes inside the wells are imaged from bottom portions of the wells. In order to adjust imaging posture or imaging positions of the little fishes inside the wells, an imaging little fish management device includes a water unit which supplies and discharges water into and from each well of the imaging plate. The water inside each well flows through a discharge hole provided laterally at a lowermost portion of each well. The water unit is also used to breed the little fishes of the wells of the imaging plate.

Abstract: It is an object of the invention to provide a method and an apparatus for processing a very large number of fish eggs for gene injection and so on with a superior performance. An egg case has an egg-arranging plate and a cover plate. The fish eggs are dropped into concave portions of the egg-arranging plate, when the cover plate opens the concave portions. The cover plates closes the concave portions after fish eggs are accommodated in the concave portions. The egg case is fixed on a table of an egg-arranging apparatus. water is supplied on the egg-arranging plate in the egg plate. A scanning nozzle sprays water on upper surface of the egg-arranging plate. After closing the concave portions with the cover plate, the egg case is inclined for dropping fish eggs remaining on the cover plate.

Abstract: It is an object of the invention to provide a method for processing a very large number of fish eggs for gene injection and so on, which employs a simple system with high performance and a reasonable construction expense. It is another object to provide the method having an water tank apparatus capable of producing a large number of fish eggs continuously. A large number of water tank groups having an independent drainage passage each is lighted up in turn with a predetermined interval. An egg-collecting case with a net bottom is set in the drainage passage connecting to the water tank group to which the lighting is started. The water tank group consists of a plurality of tank unit accommodating fishes each. Each book-shaped tank unit has a rectangular-shaped upper portion and a cone-shaped lower portion. Rotating water stream is formed in each tank unit.

Abstract: It is an object of the invention to provide a method for processing a very large number of fish eggs for gene injection and so on, which employs a simple system with high performance and a reasonable construction expense. It is another object to provide the method having an water tank apparatus capable of producing a large number of fish eggs continuously. A large number of water tank groups having an independent drainage passage each is lighted up in turn with a predetermined interval. An egg-collecting case with a net bottom is set in the drainage passage connecting to the water tank group to which the lighting is started. The water tank group consists of a plurality of tank unit accommodating fishes each. Each book-shaped tank unit has a rectangular-shaped upper portion and a cone-shaped lower portion. Rotating water stream is formed in each tank unit.

Abstract: It is an object of the invention to provide a method and an apparatus for processing a very large number of fish eggs for gene injection and so on with a superior performance. An egg case has an egg-arranging plate and a cover plate. The fish eggs are dropped into concave portions of the egg-arranging plate, when the cover plate opens the concave portions. The cover plates closes the concave portions after fish eggs are accommodated in the concave portions. The egg case is fixed on a table of an egg-arranging apparatus. water is supplied on the egg-arranging plate in the egg plate. A scanning nozzle sprays water on upper surface of the egg-arranging plate. After closing the concave portions with the cover plate, the egg case is inclined for dropping fish eggs remaining on the cover plate.

Abstract: A fertilized eggs collection apparatus for injecting genes, which is superior in safety and productivity. It is realized by simple structure. Fertilized eggs are collected from drainage with the fertilized egg in a water tank. The collection is synchronized for starting of illumination to the water tank. A probability that that feces included in the water is mixed in the collected fertilized eggs can hereby be reduced. Water including the fertilized eggs is accumulated on a fertilized-egg-holding-plate. The fertilized-egg-holding-plate has each concave portion holding one fertilized egg each. Water in the concave portions is drained from a through-hole. The fertilized-egg-holding-plate is accommodated in a case having a bottom plate portion. The case keeps water for the fertilized eggs. A shutter plate capable of sliding is disposed on the fertilized-egg-holding-plate. The shutter plate prevents that the fertilized eggs jump out from the concave portions of the fertilized-egg-holding-plate.

Abstract: A bush (31) is fitted into a housing (10) and an ultrasonic pump (12) is supported liquid tightly by the bush (31). The ultrasonic pump (12) is constituted by a pump shaft (21) formed to include a pump bore (22) passing through it axially and having upper and lower ends which are open, and an ultrasonic vibrator (23) mounted on the pump shaft (21) in the vicinity of the midpoint thereof in terms of the axial direction. A liquid vessel (16) is mounted in the housing (10) in a freely attachable and detachable manner, and the lower end portion of the pump shaft (21) is received inside the liquid vessel (16). A cap (15) is freely detachably attached to the upper end portion of the housing (10) so as to cover the upper end portion of the pump shaft (21). The top side of the cap (15) is provided with a spray port (51), and a step portion (57) is formed for supporting a mesh plate (14) at the periphery thereof at a position below the spray port (51).