Disclosed herein are methods and systems for removing carbon dioxide (CO.sub.2) 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 CO.sub.2.

A multi-stage rationed feeder for ornamental fish, comprising a container, a container cover assembly and a measuring cup assembly. A falling-material receiving cover of the container cover assembly is adapted to a container cover, and a buckle position is buckled into a container cover snapping slot, such that the falling-material receiving cover is rotatably mounted and connected to the container cover. The measuring cup assembly comprises a measuring cup and a blocking slice. One end of the blocking slice is provided with a sleeve hole for sheathing a blocking slice pin. A pin groove is adapted to a falling-material receiving cover pin snapped into the pin groove such that the measuring cup assembly is removably mounted and connected to the container cover assembly from below.

A multi-stage rationed feeder for ornamental fish, comprising a container, a container cover assembly and a measuring cup assembly. A falling-material receiving cover of the container cover assembly is adapted to a container cover, and a buckle position is buckled into a container cover snapping slot, such that the falling-material receiving cover is rotatably mounted and connected to the container cover. The measuring cup assembly comprises a measuring cup and a blocking slice. One end of the blocking slice is provided with a sleeve hole for sheathing a blocking slice pin. A pin groove is adapted to a falling-material receiving cover pin snapped into the pin groove such that the measuring cup assembly is removably mounted and connected to the container cover assembly from below.

A device for counting animal traffic in an aquatic animal passage system includes chutes positioned across the aquatic animal passage system and a sensor positioned to sense an animal moving through or in the aquatic animal passage system. The chutes and the aquatic animal passage system are formed with precast concrete segments and may include a protective liner or coating coupled to their outer surface to protect animals from contacting the outer surface of the precast concrete segments. The sensors may be integrated with the precast concrete segments forming the chutes. Smart concrete segments may be employed as transducers to create an electric field in the chutes, with impedance sensors coupled to the transducers being responsive to changes to the electric field in the chutes caused by passing animals.

A catamaran-shaped floatation device wherein an oyster basket can be attached to the upside of the device for elevation of the oysters above the water level, and then inverted to submerge the oysters below the water level.

An aquaculture environment control system comprising a plurality of discharge conduits positioned in a vessel, the discharge conduits including one or more orifices; a fluid source in fluid communication with the plurality of discharge conduits; a gas supply source in fluid communication with at least one of the plurality of discharge conduits; wherein discharging fluid from the plurality of discharge conduits into the vessel creates or maintains a current throughout fluid present within the vessel. A method of controlling an aquaculture environment comprising supplying one or more of a fluid and a gas to a plurality of discharge conduits positioned in a vessel; and discharging the one or more of the fluid and the gas from at least one of the plurality of discharge conduits to the vessel, the discharging creating or maintaining a current within the vessel.

An aquaculture environment control system comprising a plurality of discharge conduits positioned in a vessel, the discharge conduits including one or more orifices; a fluid source in fluid communication with the plurality of discharge conduits; a gas supply source in fluid communication with at least one of the plurality of discharge conduits; wherein discharging fluid from the plurality of discharge conduits into the vessel creates or maintains a current throughout fluid present within the vessel. A method of controlling an aquaculture environment comprising supplying one or more of a fluid and a gas to a plurality of discharge conduits positioned in a vessel; and discharging the one or more of the fluid and the gas from at least one of the plurality of discharge conduits to the vessel, the discharging creating or maintaining a current within the vessel.

The invention relates to a water inlet arrangement for the use in fish tanks in aquaculture, including a pipe to feed water into the tank, the pipe having a plurality of openings and, for a better adjustment of the flow, a surrounding second element having a plurality of openings and/or a fixed or adjustable shield are provided.

The invention relates to a water inlet arrangement for the use in fish tanks in aquaculture, including a pipe to feed water into the tank, the pipe having a plurality of openings and, for a better adjustment of the flow, a surrounding second element having a plurality of openings and/or a fixed or adjustable shield are provided.

Embodiments of the present disclosure describe an aquaculture environment control system comprising one or more control apparatuses positioned within a vessel at an angle relative to a proximal vessel wall and configured for scouring of the vessel, wherein each control apparatus has a discharge conduit and each discharge conduit has one or more orifices; and a fluid source in fluid communication with each of the control apparatuses. Embodiments of the present disclosure describe a method of controlling an aquaculture environment comprising supplying one or more of a fluid and gas to a control apparatus positioned within a vessel at an angle relative to a proximal vessel wall; and discharging one or more of the fluid and gas from the control apparatus at a fluid velocity sufficient for scouring of the vessel.