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A fish ladder, also known as a fishway, fish pass, fish steps, or fish cannon is a structure on or around artificial and natural barriers (such as dams, locks and waterfalls) to facilitate diadromous fishes' natural migration as well as movements of potamodromous species.
On horse-drawn and mule-drawn canals, snubbing posts were used to slow or stop a boat in the lock. A 200-ton boat moving at a few miles an hour could destroy the lock gate. To prevent this, a rope was wound around the snubbing post as the boat entered the lock. Pulling on the rope slowed the boat, due to the friction of the rope against the post.
This boat bagan consists of two boats which are connected at the front and back by two bamboo sticks so that a square is formed as a place to hang the net. Bagan perahu beranjang-anjang (boat lift nets with platform) It is similar with bagan rakit, but with two boats as the floating device. At the time of fish capture, raft bagan, boat bagan ...
A new fish cleaning station opened at Lampe Marina, on the south end of the parking lot, in Erie on May 1, 2024. The station will be open 24 hours a day, May 1 through Oct. 31, 2024.
Second revisit of jobs involving tight spaces: inspecting abandoned mineshaft ("Abandoned Mine Plugger"), concrete truck cleaner ("Termite Controller"), cleaning a buoy ("Buoy Cleaner"), cleaning grinder sump pump on fish processing ship ("Floating Fish Factory"), cleaning elevator shaft ("Dirty Jobs of the Big Apple"), aerial tram maintenance ...
Ladder entry may be used where there is a ladder into the water. Ladders may be fixed, folding or portable, and may be designed for use with swimfins. Lifting platform entry: The diver/s stand on a platform fixed to the boat by the lifting mechanism, and are lowered a short distance into the water.
An accommodation ladder is a foldable flight of steps down a ship 's side. Accommodation ladders can be mounted parallel or perpendicular to the ship's board. If the ladder is parallel to the ship, it has to have an upper platform. Upper platforms are mostly turnable. The lower platform (or the ladder itself) hangs on a bail and can be lifted ...
Lift nets, also called lever nets, are a method of fishing using nets that are submerged to a certain depth and then lifted out of the water vertically. The nets can be flat or shaped like a bag, a rectangle, a pyramid, or a cone. Lift nets can be hand-operated, boat-operated, or shore-operated.
The remora ( / ˈrɛmərə / ), sometimes called suckerfish or sharksucker, is any of a family ( Echeneidae) of ray-finned fish in the order Carangiformes. [4] Depending on species, they grow to 30–110 cm (12–43 in) long. Their distinctive first dorsal fins take the form of a modified oval, sucker-like organ with slat-like structures that ...
The best known cleaning symbioses are among marine fishes, where several species of small fish, notably of wrasse, are specialised in colour, pattern and behaviour as cleaners, providing a cleaning and ectoparasite removal service to larger, often predatory fish.