Abstract #01
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10/08/04
FW 315
New, J. G. 2003. Multimodal integration in the feeding behaviors of predatory Teleost fishes. Brain, Behavior and Evolution. 59:177-189.
The objective of this study was to determine the specific role the lateral line and vision systems play in the feeding behavior of largemouth bass, Micropterus salmoides, and muskellunge, Esox masquinongy. Test groups were created, dividing the fish into those deprived of lateral line systems, those deprived of vision systems, and those deprived of both systems. The results were compared with data obtained from a control group. The feeding behavior of both the bass and muskellunge is divided into three distinct phases as follows: (1) the location and orientation to the prey; (2) the “stalking” of the prey; and (3) the striking of the prey. In bass and muskellunge with suppressed lateral line systems, the fishes still demonstrated the ability to locate, orient to, stalk, and strike their target, though at reduced distances and orientation angles. Fish with inhibited vision systems of both species were able to locate and strike prey, but only at very limited distances with small orientation angles, and no stalking behavior. The test group with both suppressed vision and lateral line systems displayed no feeding behaviors. Both the lateral line and vision systems play key roles to differing degrees in the feeding behavior of these two species of Teleosts. In conclusion, multimodal perception is significant for optimum efficiency in locating, orienting to, and striking prey. An hierarchical structure appears to exist among modal systems, showing that all systems are important, but this value is relative to the role played in the behavior being observed.
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