A computerized machine (a) determines temporal and spatial statistical characterizations for each one of plural sonic events, (b) classifies certain pairings among the sonic events as comparable, and (c) estimates a minimum number of sonic sources, some of which are in motion, that could have generated the sonic events. Sonic event times and positions can be characterized by corresponding temporal and spatial confidence intervals. A pairing of sonic events is classified as comparable only when that pairing meets one or more preselected constraints, some of which depend on the temporal and spatial statistical characterizations. The estimated minimum number of sonic sources is equal to the number of sonic events in a longest antichain within a chronological ordering of the set of sonic events. An antichain comprises a subset of the sonic events for which no pairing of sonic events of that subset is a comparable pairing.

An organism evaluation system for analyzing organisms within a fluid flow, comprising one or more of a stimulation section comprising a means for inducing a motive response in a living organism within the fluid flow passing through the stimulation section and a shepherding section comprising a means for separating such an organism from the fluid flow, a flow normalizing section in fluid communication with the stimulation section and/or shepherding section, and a viewing section in fluid communication with the flow normalizing section, the viewing section comprising a body having formed therein a body cavity defining a viewing port, the viewing section further comprising an optical system mounted relative to the body for viewing the fluid flow within the viewing port through a cavity first opening, whereby image data relating to the fluid flow and organisms therein is acquired via the optical system for analysis.

An object identification device includes an acquisition unit and an identification unit. With respect to an object detected in each of a plurality of images captured from positions spaced apart from each other, the acquisition unit acquires at least one of the three types of information, which are: information about an inclination of a reference line of the object with respect to a reference line of a captured image; information related to the size of the object in a captured image; and information related to the disposed position of the object in a captured image. The identification unit compares sets of information acquired from respective captured images, and determines that, when the difference between the compared sets of information falls within a preset allowable range, objects captured in the respective images are the same.

The present invention pertains to a method for automatic sea lice monitoring in fish aquaculture, the method comprising submerging a camera (4) in a sea pen (300) comprising fish, using the camera to make an image of at least one of said fish, analysing the image to differentiate between individual sea lice present on the fish and the fish itself and assessing the number of sea lice present on the fish, wherein the camera is attached to a device (1, 10, 100) for guiding the salmon along an imaging track (5), the camera being directed to the track.

The present invention pertains to a method for automatic sea lice monitoring in fish aquaculture, the method comprising submerging a camera (4) in a sea pen (300) comprising fish, using the camera to make an image of at least one of said fish, analysing the image to differentiate between individual sea lice present on the fish and the fish itself and assessing the number of sea lice present on the fish, wherein the camera is attached to a device (1, 10, 100) for guiding the salmon along an imaging track (5), the camera being directed to the track.

A experimental device is specifically an annular water tank formed by a first arc-shaped water tank, a first special-shaped water tank, a second arc-shaped water tank and a second special-shaped water tank which are sequentially connected head to tail, and the outer perimeter is 70 m to 110 m, wherein the inner walls of both the first special-shaped water tank and the second special-shaped water tank are flat, both of the widths between the outer walls and the inner walls are gradually increased from the two ends to the middle, and water flow pushing equipment which are capable of enabling the maximum water flow velocity in the experimental device to reach a preset value are respectively placed in the first special-shaped water tank and the second special-shaped water tank.

A larvae counter comprising a first container for receiving water, eggs of insects and/or larvae, a second container in fluid communication with the first container for receiving water and larvae from the first container, and a larvae counting module in fluid communication with the second container for receiving water and larvae from the second container and counting the larvae.

A larvae counter comprising a first container for receiving water, eggs of insects and/or larvae, a second container in fluid communication with the first container for receiving water and larvae from the first container, and a larvae counting module in fluid communication with the second container for receiving water and larvae from the second container and counting the larvae.

The invention relates to a device, a system and a method for grading live aquatic organisms in fluid into batches by using a central control system (7) that controls the grading process in a continuous manner resulting in optimisation of the grading process, said control system (7) optimizing individual grading components, namely concentration control (3) of fish, pump (4) speed and grader (5) settings, based on a software and a database (8) containing pre-set counting data.

The invention relates to a device, a system and a method for grading live aquatic organisms in fluid into batches by using a central control system (7) that controls the grading process in a continuous manner resulting in optimisation of the grading process, said control system (7) optimizing individual grading components, namely concentration control (3) of fish, pump (4) speed and grader (5) settings, based on a software and a database (8) containing pre-set counting data.