The present invention is a collapsible bridge net having a comprising bottom ring or hoop with netting to form a base; vertical netting that is connected to the bottom ring and extending to a larger top ring, which is formed by the connection of one or more rods by a fastening means. The rod(s) have loops permanently attached positions equidistant from each other when the top larger ring is formed, and these loops accommodate 4 supporting ropes. The supporting ropes are connected together by a carabiner which also connects the ropes to a draw rope used for lowering the bridge net into the water and then raising it up out of the water with the catch load. The rod(s) may be disconnected to facilitate the folding of the bridge net for storage and ease of transport, hence the collapsible feature.

The present invention is a collapsible bridge net having a comprising bottom ring or hoop with netting to form a base; vertical netting that is connected to the bottom ring and extending to a larger top ring, which is formed by the connection of one or more rods by a fastening means. The rod(s) have loops permanently attached positions equidistant from each other when the top larger ring is formed, and these loops accommodate 4 supporting ropes. The supporting ropes are connected together by a carabiner which also connects the ropes to a draw rope used for lowering the bridge net into the water and then raising it up out of the water with the catch load. The rod(s) may be disconnected to facilitate the folding of the bridge net for storage and ease of transport, hence the collapsible feature.

A net assembly used for purse seine fishery, which is mounted on a first vessel, dropped into seawater from the first vessel, and towed by a second vessel to surround and pull fish to capture fish. The net assembly includes a plurality of floats floating on a surface of seawater to provide buoyancy to the net assembly, and coupled to one another in a spaced manner in a lengthwise direction of the net assembly; a net combination of a plurality of nets disposed under the floats in an inter-coupled state, and sunken and deployed from the surface of seawater to surround and capture fish; a weight body extending along a lower end of the net combination to provide a sinking force by means of gravity to sink the net combination; and a purse wire extending along the net combination while being spaced apart from the weight body in a downward direction, and tightened by the first vessel to allow the net assembly to form a closed space below the surface of seawater.

A net assembly used for purse seine fishery, which is mounted on a first vessel, dropped into seawater from the first vessel, and towed by a second vessel to surround and pull fish to capture fish. The net assembly includes a plurality of floats floating on a surface of seawater to provide buoyancy to the net assembly, and coupled to one another in a spaced manner in a lengthwise direction of the net assembly; a net combination of a plurality of nets disposed under the floats in an inter-coupled state, and sunken and deployed from the surface of seawater to surround and capture fish; a weight body extending along a lower end of the net combination to provide a sinking force by means of gravity to sink the net combination; and a purse wire extending along the net combination while being spaced apart from the weight body in a downward direction, and tightened by the first vessel to allow the net assembly to form a closed space below the surface of seawater.

A device mounted to a vessel for harvesting a subsurface concentration of artemia cysts. In certain embodiments, the device includes a vertically adjustable front net support, a vertically adjustable rear net support and a net having a first end secured to the front net support and a second end secured to the rear net support. A conduit can be coupled to the second end of the net whereby the concentrated artemia cysts are drawn from the second end of net to a processing destination. In certain embodiments, the net has an aspect ratio of at least approximately 4:1. The processing destination could be the vessel or some other destination. In certain embodiments, the vessels are equipped with a dewatering station to which the concentrated cysts are directed for further processing. In some embodiments, the net is secured to a frame which is in turn coupled to the front net support. The front net support can include one or more arms. In certain embodiments, the front net support includes a brace which can be attached to the vessel. The brace can include one more sleeves that correspond to the one or more arms and be hingedly attached to the vessel.

A device mounted to a vessel for harvesting a subsurface concentration of artemia cysts. In certain embodiments, the device includes a vertically adjustable front net support, a vertically adjustable rear net support and a net having a first end secured to the front net support and a second end secured to the rear net support. A conduit can be coupled to the second end of the net whereby the concentrated artemia cysts are drawn from the second end of net to a processing destination. In certain embodiments, the net has an aspect ratio of at least approximately 4:1. The processing destination could be the vessel or some other destination. In certain embodiments, the vessels are equipped with a dewatering station to which the concentrated cysts are directed for further processing. In some embodiments, the net is secured to a frame which is in turn coupled to the front net support. The front net support can include one or more arms. In certain embodiments, the front net support includes a brace which can be attached to the vessel. The brace can include one more sleeves that correspond to the one or more arms and be hingedly attached to the vessel.

A method for naturally culling mussel population on a mussel-culture rope, comprising the steps of installing a predator guard around the mussel-culture rope; and during the step of installing, adjusting a degree of mussel protection of that predator guard. In one aspect, the step of adjusting comprises the steps of opening and adjusting a size of a breach in the predator guard. In another aspect, the predator guard is made of an elongated hemicylindroidal mesh-like element with an open side. The hemicylindroidal element has flaps bordering the open side. The flaps constitute duck-mobility impediments for limiting without completely precluding predation by diving ducks.

A method for constructing a cage body of a tapered cage assembled in a rigid-flexible manner includes steps as follows. A cage body of a tapered aquaculture cage is assembled by combining a rigid-structure copper alloy stretched mesh and a flexible synthetic fiber mesh. Pipe rings mounted on the standard component of the synthetic fiber mesh are mated in a staggered manner with plugging rings on the standard component of the copper alloy stretched mesh, and high-performance synthetic fiber rope is rove through the pipe rings and the plugging rings; in this way, the connection is completed. The cage effectively improves the cage resilience under the ocean current condition, avoids mesh sheet deformation or corner breakage, enhances the water exchange capability in and out of the cage body of the gravity cage, and effectively improves the growth environment for the fishes farmed in the cage body.

A method for naturally culling mussel population on a mussel-culture rope, comprising the steps of installing a predator guard around the mussel-culture rope; and during the step of installing, adjusting a degree of mussel protection of that predator guard. In one aspect, the step of adjusting comprises the steps of opening and adjusting a size of a breach in the predator guard. In another aspect, the predator guard is made of an elongated hemicylindroidal mesh-like element with an open side. The hemicylindroidal element has flaps bordering the open side. The flaps constitute duck-mobility impediments for limiting without completely precluding predation by diving ducks.

A seine net includes a net body having a woven net, an upper rope, a lower rope, a left wing net and a right wing net. The woven net has a division rope disposed between the upper rope and the lower rope, upper mesh areas woven between the upper rope and the division rope and horizontally juxtaposed, and lower mesh areas woven between the lower rope and the division rope and horizontally juxtaposed. Each upper mesh area has multiple first diamond meshes. Each lower mesh area has multiple second diamond meshes. The first diamond meshes are reversely arranged relative to the second diamond meshes. The first diamond meshes and the second diamond meshes gradually decrease in size from the left and right wing nets toward the net middle.