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Catch More Fish
Fish survive in your lake using the same five senses us humans do, with sight, sound, touch, taste and smell. But fish have a modified sense of hearing, something much more sophisticated then we do. It’s called the lateral line system. Most anglers are familiar with the lateral line. Understanding exactly how fish use it can help the average Joe catch more fish. Sensitive tissue (organs) fills a canal in the skin that runs down along the side of a fish. It looks like a raised bumpy line. Pores in the fish’s scales or skin connect the canal with the surrounding water, allowing the network to detect changes in water pressure out side the fish.
Although the lateral line is visible on the sides of fish, the system is actually well-developed elsewhere, especially on the fish’s head. These canals are located around the eyes, on the top of the head, at the front of the head and under the lower jaw. Everything propelling itself on or in the water, such as bait fish, fishing lures, crawfish, etc…. moves water and in so doing creates pressure waves. Fish make pressure waves when they swim too. Basically all aquatic creatures create waves when they paddle with appendages. This is readily apparent when you see the wake of a fish swimming near the surface. Whatever the source, the lateral line system detects these pulses. Stationary objects ahead of the fish distort and rebound the waves, and the well developed sensory system on the head detects these changes. The result is that the fish senses what is ahead, even in total darkness. Adding it all up, the lateral line system senses both swimming and stationary objects. But it’s also involved in feeding. Although northern pike and musky are typically considered sight feeders, their lateral line is critical for making the final lunge to capture their meal Even a blind musky will successfully strike prey at close range. Fish in the pike family have well developed sensory pores on the top of the head, as they attack prey from below. Smallmouth bass, eat a lot of crayfish and therefore have well developed pores under the lower jaw. These same pores are poorly developed in the largemouth bass, which feeds heavily on baitfish. In a nut shell, the lateral line system correlates well with feeding behavior, and that sheds light on what presentations might work best for certain species in specific situations. |
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May, 2012
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