Abstract: A high proteinaceous animal feedstock comprises algae having a solids content between from about 6 to about 95 weight percent. The feedstock is typically prepared by harvesting at least a portion of algal turf from its growing surface and removing water from the severed algal turf until the solids content of the severed algal turf is between from about 6 to about 95 weight percent.

Abstract: A fish-cage incubator has a light source for attracting zooplankton therein a mesh barrier that admits zooplankton and excludes predators of fish larvae.

Abstract: A method and apparatus for administering a fluid solution to an individual fish, wherein the fish is placed in a feeder apparatus connected to a metering device. The metering device stores a quantity of the solution. The feeder apparatus includes a hooded cavity for placement of the head of a fish and a calibrated adapter for placement into the mouth of the fish. The calibrated adapter has a throughbore communicating to the stored quantity of solution in the metering device so that triggering the metering device expels the fluid directly into the mouth of the fish.

Abstract: A method of using phosphate chemicals of the formula LDPO.sub.4 to provide controlled release nutrients to the food chain in aquatic environments to supply improved feeding and growth of fish, wherein L represents a monovalent Lewis Acid moiety, D represents a divalent metal moiety, and PO.sub.4 represents an orthophosphate moiety. The method includes the use of slow release phosphate chemicals which provide water soluble nutrients disseminating in flowing water streams for a period of about one year. The chemicals include: magnesium ammonium phosphate, manganous ammonium phosphate, zinc ammonium phosphate, ferrous ammonium phosphate, magnesium potassium phosphate, manganous potassium phosphate, and manganous potassium phosphate.

Abstract: Controlled release fertilizer compositions which release fertilizer at a controlled rate over an extended period of time are employed in aquaculture treatment methods whereby nutrients are efficiently and effectively released into closed aquatic ecosystems such as ponds, lakes, watersheds and other aqueous environments over a period of time in order to enhance the growth of phytoplanktonic algae populations in the water and to thereby promote marine life populations.

Abstract: A live insect feeder for use with a tank, such as an aquarium or a terrarium containing a live fish or animal that feeds on the live insects, includes a container having an opening through which an adult flightless insect can pass, and a tacky substance encircling the opening on the outside of the container. A medium for feeding the insects is contained within the container. When fertile eggs of the flightless insect are introduced into the container, the larvae that hatch from the eggs feed upon the food medium until they reach the adult stage. They either remain within the container, breeding a new generation of insects, or pass through the opening. When the container is positioned with the opening over the tank, the flightless insects passing through the opening either fall off or jump off into the tank thereby becoming food for the fish or animal living within the tank.

Abstract: An automatic fish feeding system with a first feeder mounted on a first tank holding water and a school of fish and a second feeder mounted on a second tank holding water and a school of fish. Each of the feeders has a container for holding a supply of food and an electric motor for driving a food discharge conveyor for feeding food from the container into a tank. A control system for the feeders includes a power supply, a control center and a power lead connected to a station at each feeder. The control center, for a preselected time period, continuously distributes a first voltage to the station for each feeder and intermittently distributes a second voltage to the station for each feeder. The system has a power connection from the electric motor of the first feeder to the adjacent station, a power connection from the electric motor of the second and other feeders to adjacent stations.

Abstract: The invention provides a method of preconditioning selected species of fish to associate characteristic acoustic signals with food, thereby to induce the fish to congregate towards a selected location in response to such acoustic signals.