Abstract: Provided herein are controlled methods for producing biofuel and lipids from algae. In certain embodiments, the controlled methods comprise: (i) providing upwelled water in a body of water; (ii) culturing algae in the upwelled water; (iii) feeding the algae to planktivorious organisms; (iv) extracting lipids from the planktivorious organisms; and (v) polishing the lipids to make biofuel or other useful products. In certain embodiments, the upwelled water is provided in the body of water by using an open-cycle OTEC system. Also provided herein are controlled systems for producing biofuel and lipids from algae.

Abstract: The invention provides methods for producing biofuel from algae, that use fish which have a high capacity of producing and/or accumulating lipids to harvest algae from an algal culture. The invention also provides methods for growing fish that result in a high lipid content. The invention also provides methods for creating fish that have a high capacity of producing and accumulating lipids by breeding and/or recombinant DNA techniques. Also included are transgenic fish that have a higher lipid content than wild-type fish.

Abstract: Provided herein are systems and methods for producing eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) and/or derivatives and/or mixtures thereof by growing algae that produce the oils containing EPA and/or DHA and/or derivatives and/or mixtures thereof, harvesting the algae with fish in one or more enclosed systems, and then processing fish to separate and purify the EPA and/or DHA. The multi-trophic systems provided herein comprise at least one enclosure that contains the algae and the fishes, and means for controllably feeding the algae to the fishes. Also provided herein are the lipid compositions extracted from the fishes.

Abstract: Provided herein are systems and methods for extracting lipids and/or producing biofuel from algae in marine and freshwater environments, wherein algae and bivalves are co-cultured in a system of enclosures comprising water that comprises recycled nutrients that are essential for algal growth. The system also include enclosures for culturing fishes which are used to harvest the algae.

Abstract: Provided herein are systems and methods for extracting lipids and/or producing biofuel from algae in marine and freshwater environments, wherein algae and bivalves are co-cultured in a system of enclosures comprising water that comprises recycled nutrients that are essential for algal growth. The system also include enclosures for culturing fishes which are used to harvest the algae.

Abstract: Disclosed herein are methods for mixing of carbon dioxide (CO2) and/or other nutrients in an ocean, wherein surface water CO2 is decreased to reduce or slow acidification of the ocean, and increases in fish populations are advantageously promoted. Also disclosed herein are methods and systems for recovery of nutrients, for example, phosphorus, from an ocean floor in the form of fish biomass, which may be used to make such useful products as fish fillets, fish meal, fish oil, biofuel or fertilizer.

Abstract: Provided herein are controlled methods for producing biofuel and lipids from algae. In certain embodiments, the controlled methods comprise: (i) providing upwelled water in a body of water; (ii) culturing algae in the upwelled water; (iii) feeding the algae to planktivorious organisms; (iv) extracting lipids from the planktivorious organisms; and (v) polishing the lipids to make biofuel or other useful products. In certain embodiments, the upwelled water is provided in the body of water by using an open-cycle OTEC system. Also provided herein are controlled systems for producing biofuel and lipids from algae.

Abstract: Disclosed herein are methods and systems for removing carbon dioxide (CO2) from water and quantifying the carbon so removed, thus facilitating valuation of that carbon for schemes (e.g., Kyoto agreement) that attach financial rewards for capture, sequestration or removal of carbon or CO2.

Abstract: Provided herein are systems and methods for producing fish lipids and/or biofuels from algae that use nutrient-?ch water derived from an upwelled water. The methods comprise harvesting the algae by a population of planktivorous organisms, such as fishes, gathering the planktivorous organisms, and extracting lipids from the organisms and/or polishing the lipids to form biofuel.

Abstract: Provided herein are systems and methods for extracting lipids and/or producing biofuel from algae in marine and freshwater environments, wherein algae and bivalves are co-cultured in a system of enclosures comprising water that comprises recycled nutrients that are essential for algal growth. The system also include enclosures for culturing fishes which are used to harvest the algae.

Abstract: Provided herein are systems and methods for producing biofuel from microalgae that use a population of zooplankton to harvest microalgae in a culture. The methods further comprise gathering the zooplankton, extracting lipids from the zooplankton, and processing the lipids to form biofuel. The systems provided herein comprise at least one enclosure comprising microalgae, means for making the microalgae available to a population of zooplankton, and means for gathering the zooplankton.

Abstract: The invention relates to systems and methods for reducing algal biomass in eutrophic water, wherein organism that feed on algae are introduced into the eutrophic water and cultured in the eutrophic water, until the algal biomass is reduced or the organisms have reach desirable size. The body of eutrophic water can be restocked with juveniles after harvesting. The organisms can be fishes and/or shellfishes. The methods further comprising producing biofuel, specialty chemicals, nutraceuticals, food, and/or fish meal from the harvested fish.

Abstract: The invention relates to systems and methods for regulating algal biomass in offshore waters near an oil and gas production platform. The systems of the invention encompasses a plurality of modules for managing nutrients, algae, and aquaculture, including enclosures for containing aquatic organisms, and various operating subsystems that are operably associated with surface and underwater structures of the platform. In one embodiment of the invention, aquatic organisms are cultured in eutrophic water to feed on algae, thereby reducing the algal biomass. In other embodiments, the diversity of algae in an algal bloom is modified and the productivity of oligotrophic water is increased.

Abstract: The invention provides methods for producing biofuel from algae, that use fish which have a high capacity of producing and/or accumulating lipids to harvest algae from an algal culture. The invention also provides methods for growing fish that result in a high lipid content. The invention also provides methods for creating fish that have a high capacity of producing and accumulating lipids by breeding and/or recombinant DNA techniques. Also included are transgenic fish that have a higher lipid content than wild-type fish.

Abstract: Provided herein are systems and methods for producing eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) and/or derivatives and/or mixtures thereof by growing algae that produce the oils containing EPA and/or DHA and/or derivatives and/or mixtures thereof, harvesting the algae with fish in one or more enclosed systems, and then processing fish to separate and purify the EPA and/or DHA. The multi-trophic systems provided herein comprise at least one enclosure that contains the algae and the fishes, and means for controllably feeding the algae to the fishes. Also provided herein are the lipid compositions extracted from the fishes.

Abstract: The invention provides systems and methods for producing biofuel from algae wherein the algae and fishes are co-cultured in a body of water. The methods further comprise inducing the algae to accumulate lipids by environmental stress, and concentrating the algae prior to extraction of the algal oil. The systems of the invention comprise at least one growth enclosure, means for concentrating algae, and means for subjecting algae to environmental stress.

Abstract: The invention provides systems and methods for producing biofuel from algae that use cultured fish to harvest algae from an algal culture. The methods further comprise gathering the fish, extracting lipids from the fish, and processing the lipids to form biofuel. The multi-trophic systems of the invention comprises at least one enclosure that contains the algae and the fishes, and means for controllably feeding the algae to the fishes. The lipid compositions extracted from the fishes are also encompassed.