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Erpobdella obscura is a freshwater ribbon leech common in North America. It is a relatively large leech and is commonly used as bait by anglers for walleye and other sport fish. In Minnesota, live bait dealers annually harvest over 45,000 kg of bait-leeches, raising concerns of over-harvest. [3]
Hirudiculture is the culture, or farming, of leeches in both natural and artificial environments. This practice drew the attention of Parisian savants and members of the French Société Zoologique d'Acclimitation in the mid-to-late 19th century as a part of a larger interest in the culture of fish and oysters. [1]
Leeches are hermaphrodites, and mating may take place on or off the fish host, but in either case, the cocoon, usually containing a single egg, is deposited elsewhere, usually stuck to a stone or piece of vegetation, or even to the carapace of a crustacean. When the egg hatches, the juvenile leech has about a week to find a suitable fish host ...
In turn, leeches are prey to fish, birds, and invertebrates. [11] The name for the subclass, Hirudinea, comes from the Latin hirudo (genitive hirudinis), a leech; the element -bdella found in many leech group names is from the Greek βδέλλα bdella, also meaning leech. [12] The name Les hirudinées was given by Jean-Baptiste Lamarck in 1818 ...
Leeches are hermaphrodite and pair up to impregnate each other by hypodermic injection. [6] The eggs are laid in dark brown cocoons which are cemented to submerged objects. After the eggs hatch, the juvenile leeches must seek out suitable fish hosts. The whole life cycle takes about four weeks to complete. [2]
Back of Macrobdella decora – note the row of orange dots down the middle and the two sets of black ones on the sides.. Macrobdella decora is a medium-sized leech, growing between 5 and 8.5 cm (2.0 and 3.3 in) long, and weighing from 1.48 to 3.69 grams (0.052 to 0.130 oz).
The egg-sucking leech is an artificial fly used in fly fishing.Its name comes from its resemblance to a leech in the process of consuming a fish egg.The body of the lure is dark-colored like a leech, often black or purple, and the tip of the lure is bright red or orange to look like a small rounded fish egg.
This leech is an external parasite of cartilagenous fishes such as the marbled electric ray (Torpedo marmorata), the common stingray (Dasyatis pastinaca), and the thornback ray (Raja clavata), and less often of ray-finned fish such as the European plaice (Pleuronectes platessa), the black scorpionfish (Scorpaena porcus), and the red scorpionfish (S. scrofa).