Methods for attaching a radio frequency (RF) transmitter to an animal are provided. The methods can include providing an RF transmitter and providing an injection device having a needle of gauge of 9 or smaller; providing the RF transmitter into the injection device; and providing the RF transmitter through the 9 gauge or smaller needle and into the animal.

Methods for attaching a radio frequency (RF) transmitter to an animal are provided. The methods can include providing an RF transmitter and providing an injection device having a needle of gauge of 9 or smaller; providing the RF transmitter into the injection device; and providing the RF transmitter through the 9 gauge or smaller needle and into the animal.

Injectable transmitters are provided that can include a body with the body housing a power source and an oscillator, the injectable transmitter also including an antenna extending from the body, the body and antenna being of sufficient size to be injected through a 9 gauge needle. Radio frequency transmitters are provided that can include a body extending from a nose to a tail with the body housing a power source and RF signal generator components. The power source of the transmitter can define at least a portion of the nose of the body. The transmitters can have an antenna extending from the tail. Methods for attaching a radio frequency (RF) transmitter to an animal are provided. The methods can include providing an RF transmitter and providing an injection device having a needle of gauge of 9 or smaller; providing the RF transmitter into the injection device; and providing the RF transmitter through the 9 gauge or smaller needle and into the animal.

Injectable transmitters are provided that can include a body with the body housing a power source and an oscillator, the injectable transmitter also including an antenna extending from the body, the body and antenna being of sufficient size to be injected through a 9 gauge needle. Radio frequency transmitters are provided that can include a body extending from a nose to a tail with the body housing a power source and RF signal generator components. The power source of the transmitter can define at least a portion of the nose of the body. The transmitters can have an antenna extending from the tail. Methods for attaching a radio frequency (RF) transmitter to an animal are provided. The methods can include providing an RF transmitter and providing an injection device having a needle of gauge of 9 or smaller; providing the RF transmitter into the injection device; and providing the RF transmitter through the 9 gauge or smaller needle and into the animal.

A mortality trap (150) for a spar buoy fish pen (100) is configured to receive and trap deceased fish, or morts (M), that sink from the fish pen. The mortality trap attaches to a lower portion of the spar buoy (110) to define a first passage (90). The sinking mort passes into an upper receiver portion (150U) of the mortality trap, and encounters a sloping transverse panel (154). Gravity causes the mort to continue through a second passage (B) into a lower entrapment portion (150L), and further into a region underlying the transverse panel (154) preventing the mort from escaping if it becomes positively buoyant. The entrapment portion optionally includes a converging channel into a valved port, to permit extraction of morts. The mortality trap may be located on the distal end of the spar buoy, or at an intermediate location on the lower portion of the spar buoy.

An apparatus for sorting aquatic organisms having different characteristics in accordance with the characteristics, the apparatus including a container configured to contain the aquatic organisms and water, a plurality of electrodes provided in the container, a controller for controlling electric pulses applied to one or more electrodes of the plurality of electrodes, and a driving-out unit for driving out the aquatic organisms having been sorted, wherein the electric pulses controlled by the controller are applied to the one or more electrodes to form an electric field so as to selectively move the aquatic organisms in the container to different portions in the container according to the characteristics, and the driving-out unit drives out the aquatic organisms to an outside of the container from the portion according to the characteristics, after the aquatic organisms are moved.

An apparatus for sorting aquatic organisms having different characteristics in accordance with the characteristics, the apparatus including a container configured to contain the aquatic organisms and water, a plurality of electrodes provided in the container, a controller for controlling electric pulses applied to one or more electrodes of the plurality of electrodes, and a driving-out unit for driving out the aquatic organisms having been sorted, wherein the electric pulses controlled by the controller are applied to the one or more electrodes to form an electric field so as to selectively move the aquatic organisms in the container to different portions in the container according to the characteristics, and the driving-out unit drives out the aquatic organisms to an outside of the container from the portion according to the characteristics, after the aquatic organisms are moved.

In one aspect, there is provided a method that includes receiving, by a control system having (i) a first camera configured to obtain an image of a scene, (ii) a winch controller, and (iii) a feeding system configured to deliver a feed to aquaculture, instructions to initiate a calibration of the first camera, determining a calibration state of the first camera, determining a sequence of calibration steps based on the calibration state of the first camera, and executing the sequence of calibration steps to calibrate the first camera.

In one aspect, there is provided a method that includes receiving, by a control system having (i) a first camera configured to obtain an image of a scene, (ii) a winch controller, and (iii) a feeding system configured to deliver a feed to aquaculture, instructions to initiate a calibration of the first camera, determining a calibration state of the first camera, determining a sequence of calibration steps based on the calibration state of the first camera, and executing the sequence of calibration steps to calibrate the first camera.

The innovative systems and methods described herein use a high-resolution imaging microscope for capturing images of marine microorganisms and particles in situ in an aquatic environment. Using darkfield illumination, high-resolution images may be obtained, capturing features of the microorganism or particle as small as 10 m in remarkable clarity. Utilizing an open flow-through approach in sample imaging, the delicate structures of the plankton and particles may be imaged completely intact without damage and in their natural orientation. The images can be classified at high accuracy based on physiological and morphological information captured in the image including features as fine as 1 m. The disclosed classification method utilizes adaptable training sets of taxonomic categories and a novel method of discerning in-focus targets, providing a highly accurate identification system.