|
|
Northern Pike
Deutsch: Europäischer Hecht
The northern pike (known as the pike in Britain), Esox lucius, is a species of carnivorous fish of the genus Esox (the pikes). They are typical of brackish and freshwaters of the northern hemisphere. They are also known by the somewhat misleading folk name, "water wolf".Within North America, there are northern pike populations in northern Minnesota, eastern New York, northern New England, most of Canada (though pike are rare in British Columbia), Alaska, the Ohio Valley, the upper Mississippi River and its tributaries, the Great Lakes Basin and surrounding states, Missouri, and Nebraska. They are also stocked in, or have been introduced to, some western lakes and reservoirs for angling purposes, although this practice often threatens other species of fish such as trout and salmon, causing government agencies to exterminate the pike by poisoning lakes.
Northern pike are most often olive, shading into yellow to white along the belly. The flank is marked with short, light barlike spots and there are a few to many dark spots on the fins. The lower half of the gill cover lacks scales and they have large sensory pores on their head and on the underside of the lower jaw which are part of the lateral line system. Unlike the similar-looking and closely related muskellunge, the northern pike has light markings on a dark body background and fewer than six sensory pores on the underside of each side of the lower jaw.
Pike grow to a relatively large size; lengths of 150 cm (59 in) and weights of 25 kg (55 pounds) are not unheard of.
Northern pike occasionally breed with muskellunge to produce the hybrid commonly known as the tiger muskellunge[1] (Esox masquinongy x lucius or Esox lucius x masquinongy, depending on the gender of each of the contributing species). In the hybrids, the males are almost invariably sterile although the females are sometimes fertile.Another form of northern pike, the silver pike, is not a subspecies but rather a mutation that occurs in scattered populations. Silver pike, sometimes called silver muskellunge, lack the rows of spots and appear silver or silvery-blue in color.).
Pike are found in sluggish streams and shallow, weedy places in lakes, as well as in cold, clear, rocky waters. Pike are typical ambush predators; they lie in wait for prey, holding perfectly still for long periods and then exhibit remarkable acceleration as they strike. The fish has a distinctive habit of catching its prey sideways in the mouth, killing or immobilising it with its sharp teeth, and then turning the prey lengthwise to swallow it. It eats mainly fish, but on occasion water voles and ducklings have also been known to fall prey to pike. Pike will aggressively strike at any fish in the vicinity, even at other pike. Young pike have been found dead from choking on a pike of a similar size. Northern pike also feed on frogs, insects and leeches.
Back to top
|