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• W1550114984 abstract "The mechanosensory lateral line system is found in all fishes and mediates critical behaviors, including prey detection. Widened canals, one of the four patterns of cranial lateral line canals found among teleosts, tend to be found in benthic fishes and/or fishes that live in hydrodynamically quiet or light-limited environments, such as the deep sea. Little is known about the functional significance of widened canals because most fishes with this morphology are inaccessible for laboratory study. A representative of one genus of Lake Malawi cichlid fishes, Aulonocara, has widened canals and provides an opportunity to investigate the role of widened lateral line canals in prey detection. In addition, its behavior can be compared to that of Tramitichromis sp., another Lake Malawi cichlid that has narrow canals, since both feed on benthic invertebrates in sandy substrates. A behavioral assay was developed in which several pairs of “benthic” live and dead prey (tethered brine shrimp) were placed on the bottom of a large tank to determine if Aulonocara stuartgranti (Chapter 1) and Tramitichromis (Chapter 2) used the visual and hydrodynamic stimuli generated live, mobile prey (tethered brine shrimp) compared to immobile, dead prey, under both light and dark conditions. In addition, some fish were treated with cobalt chloride to temporarily inactive the lateral line system. Behavior was recorded using high definition video and statistically analyzed using generalized linear mixed models. The hydrodynamic stimuli generated by the brine shrimp were visualized and characterized using digital particle imaging velocimetery (DPIV). These two studies demonstrated that A. stuartgranti (widened canals) uses both vision and the lateral line system to feed under light conditions, but uses its lateral line system to feed in the dark, contributing to our appreciation of multimodal interactions and strongly suggesting that widened lateral line canals are an adaptation for prey detection. The later study showed that, in contrast, Tramitichromis (narrow canals) is a visual predator that does not use their narrow lateral line canals to find prey as illustrated by the fact that their behavior was unaffected by ablation of the lateral line system." @default.
• W1550114984 created "2016-06-24" @default.
• W1550114984 creator A5036759914 @default.
• W1550114984 date "2020-05-26" @default.
• W1550114984 modified "2023-09-25" @default.
• W1550114984 title "THE ROLE OF FLOW SENSING BY THE LATERAL LINE SYSTEM IN PREY DETECTION IN TWO AFRICAN CICHLID FISHES" @default.
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• W1550114984 doi "https://doi.org/10.23860/diss-schwalbe-margot-anita-2013" @default.
• W1550114984 hasPublicationYear "2020" @default.
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