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An otter board Front of the otter board Folded otter board. The otter is a fishing device constructed with two parts, an otter board and a fishing line. It is steered by pulling on the line then letting stack so the slide mechanism on the board operates to switch direction. It may be used from a boat or pulled from the shore.
Acoustic harassment and acoustic deterrents are technologies used to keep animals [1] and in some cases humans away from an area. Applications of the technology are used to keep marine mammals away from aquaculture facilities and to keep birds away from certain areas (for instance in the vicinity of airports and blueberry fields).
1: trawl warp, 2: otter boards, 3: longline chains, 4 hunter, 5: weights 6: headline with floats, 7: pre-net, 8: tunnel and belly, 9: codend. Midwater trawling is trawling, or net fishing, at a depth that is higher in the water column than the bottom of the ocean. It is contrasted with bottom trawling.
In the past, both Lutra lutra and Lutrogale perspicillata were used for otter fishing, but today, only L. perspicillata is used. Otter fishing is usually done at night between 9 PM and 5 AM. The average catch by a single boat in a night ranges from 4 to 12 kilograms (8.8 to 26.5 lb) of crabs, fish and shrimp.
Mother otters have one pup at a time and sea otter pups are dependent on their mothers for an average of 6 to 7 months. Extremely young pups cannot swim or dive due to their natal fur coating, so they must be anchored to the mothers at all times. Otter pups therefore receive undivided attention from their mothers for prolonged periods of time.
Camp Topridge boathouse, Adirondacks, USA. A boathouse (or a boat house) is a building especially designed for the storage of boats, normally smaller craft for sports or leisure use. [1] These are typically located on open water, such as on a river. Often the boats stored are rowing boats. Other boats such as punts or small motor boats may also ...
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The Stuntz Bay Boathouse Historic District comprises a row of 143 boathouses on Lake Vermilion in Breitung Township, Minnesota, United States. They were mostly built in the first half of the 20th century by employees of the adjacent Soudan Iron Mine. The mining company provided the lots to employees as a reward for their years of service, and ...