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.

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.

The invention relates to a wire material consisting of metallic material having an oxide surface, wherein the oxide surface of the wire material has a first oxide layer, which covers the metallic material at least in part and has a thickness of at least 200 nm to 2 μm, and the oxide surface of the wire material has a second oxide layer which covers metallic material in the regions which are not covered by the first oxide layer. According to the invention, the second oxide layer has a maximum thickness of 0.01 to 10% of the thickness of the first oxide layer. The invention furthermore relates to a mesh and a breeding cage for aquaculture.

The invention relates to a wire material consisting of metallic material having an oxide surface, wherein the oxide surface of the wire material has a first oxide layer, which covers the metallic material at least in part and has a thickness of at least 200 nm to 2 μm, and the oxide surface of the wire material has a second oxide layer which covers metallic material in the regions which are not covered by the first oxide layer. According to the invention, the second oxide layer has a maximum thickness of 0.01 to 10% of the thickness of the first oxide layer. The invention furthermore relates to a mesh and a breeding cage for aquaculture.

A net for fishing or other purposes. The net includes a hoop frame connected to a pole by a yoke. The yoke defines sockets in which respective arms of the hoop frame and a distal end of the pole are received. Plugs in the arms of the hoop frame desirably prevent water from passing the plugs into the hoop frame. A plug in the distal end of the pole desirably prevents water from passing the plug into the pole. The yoke and plugs provide a robust connection of the hoop frame to the pole and help retain air in the hoop frame and pole for buoyancy of the net.

A net for fishing or other purposes. The net includes a hoop frame connected to a pole by a yoke. The yoke defines sockets in which respective arms of the hoop frame and a distal end of the pole are received. Plugs in the arms of the hoop frame desirably prevent water from passing the plugs into the hoop frame. A plug in the distal end of the pole desirably prevents water from passing the plug into the pole. The yoke and plugs provide a robust connection of the hoop frame to the pole and help retain air in the hoop frame and pole for buoyancy of the net.

A harvesting mechanism for a fishing device includes an actuator, a wireless receiver for receiving a wireless signal to control the actuator, and a rope securing mechanism mechanically coupled to the actuator. The rope securing mechanism secures a rope. In response to receiving the wireless signal, the wireless receiver activates the actuator to cause the rope securing mechanism to release the rope.

A fishing device includes a net disposed in a body of water containing fishes and a post installed near a perimeter of the net. The post further includes a stem, a cord, and a weight. A portion of the stem is above a surface of the body of water, and the cord is slidably secured to the stem. A first end of the cord is attached to the weight, and a second end of the cord is attached to the net. The weight is configured to move from a first position to a second position upon receiving wireless communication, and the first position is higher than the second position.

A fishing device includes a net disposed in a body of water containing fishes and a post installed near a perimeter of the net. The post further includes a stem, a cord, and a weight. A portion of the stem is above a surface of the body of water, and the cord is slidably secured to the stem. A first end of the cord is attached to the weight, and a second end of the cord is attached to the net. The weight is configured to move from a first position to a second position upon receiving wireless communication, and the first position is higher than the second position.

An instrumentation system for a net barrier comprising at least one tension sensor node attached to one or more threads of said net barrier is described. Also described is a sensor node, and use of this sensor node.