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A trotline is a heavy fishing line with baited hooks attached at intervals by means of branch lines called snoods. A snood is a short length of line which is attached to the main line using a clip or swivel, with the hook at the other end. A trotline can be set so it covers the width of a channel, river, or stream with baited hooks and can be left unattended. There are many ways to set a trotline, with most methods involving weights to hold the cord below the surface of the water. They are used for catching crabs〔http://www.bluecrab.info/crabbing/trotline.html〕 or fish (particularly catfish〔http://www.whiskerkitty.com/Trotlines.html〕). Trotlines should be used with caution as they are illegal in many states. Trotlines can be contrasted with droplines. Whereas a trotline has a series of hooks suspended horizontally in the water, a dropline has a series of hooks suspended vertically in the water. ==Variations== In its use in the commercial crabbing industry (on the Chesapeake Bay for example), a trotline is used as a variation of a setline. Webster's dictionary defines a setline as being "a long heavy fishing line to which several hooks are attached in series." A trotline is defined as "a comparatively short setline used near shore or along streams." Some other common variations of a setline include limblines, throwlines, and juglines. The Virginia Department of Game & Fisheries defines a trotline as "a line without a rod or reel attached that need not be held in the hand or closely attended." As used for crabbing, a trotline is nothing more than a long line, resting on the bottom and anchored at both ends, to which a series of baits are attached at intervals of two to six feet. The baits are attached to the main line by simple slipknots or by shorter lines called dropper lines (known as trots or snoods.) Crab trotlines are usually baited with chicken necks, chicken livers, bull lips, eels or other inexpensive baits. Maryland blue crabs are harvested by waterman on small workboats using trotlines and crab pots. When caught by trotlines, the line is set and the workboat moves slowly end to end, bringing the line to the surface where the waterman catches the crab. Crabs on a trotline are not hooked, they are simply netted by the waterman at the surface, with the workboat moving slowly enough through the water that the crab does not discern movement as it eats the bait. The crab having been netted at the surface, the trotline moves back to or toward the bottom with the same bait intact to attract another crab. Depending on the length of the trotline (usually from at least 100 yards and up to a mile), a commercial waterman can catch anywhere from 4 bushels to 20 bushels of crabs daily. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「trotline」の詳細全文を読む スポンサード リンク
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