Parallel Medullary Gustatospinal Pathways In a Catfish: Possible Neural Substrates for Taste-Mediated Food Search

Finger, Thomas E.

doi:10.1523/jneurosci.17-12-04873.1997

Cited by 18 publications

(13 citation statements)

References 57 publications

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“…In some teleosts, the reticulospinal neurons exhibit a clear segmentation: They are distributed in 14 clusters that are postulated to lie in 8 metameric segments (Kanwal and Finger, 1997). However, a similar metameric pattern was not reported in the reticulospinal system of the dogfish (Smeets and Timerick, 1981;Timerick et al, 1992), and we have not found a distribution of ChAT-ir reticular cells in groups different from the cell groups reported by those authors.…”

Section: Segmental Organization Of Cholinergic Nuclei Of the Braincontrasting

confidence: 47%

Distribution of choline acetyltransferase immunoreactivity in the brain of an elasmobranch, the lesser spotted dogfish (Scyliorhinus canicula)

et al. 2000

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Section: Segmental Organization Of Cholinergic Nuclei Of the Braincontrasting

confidence: 47%

Distribution of choline acetyltransferase immunoreactivity in the brain of an elasmobranch, the lesser spotted dogfish (Scyliorhinus canicula)

et al. 2000

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“…Our neomycin data, however, are not definitive regarding capture swim modality because these swims remain well formed in the Light + Neomycin condition. Contributions to the control of capture swims by olfactory and gustatory senses (Caprio, 1978; Kanwal and Finger, 1997; Friedrich et al, 2004; Gardiner and Atema, 2007) or tactile interactions (Patterson et al, 2013) remain a possibility.…”

Section: Discussionmentioning

confidence: 99%

Fusion of locomotor maneuvers, and improving sensory capabilities, give rise to the flexible homing strikes of juvenile zebrafish

Westphal¹,

O’Malley²

2013

Front. Neural Circuits

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At 5 days post-fertilization and 4 mm in length, zebrafish larvae are successful predators of mobile prey items. The tracking and capture of 200 μm long Paramecia requires efficient sensorimotor transformations and precise neural controls that activate axial musculature for orientation and propulsion, while coordinating jaw muscle activity to engulf them. Using high-speed imaging, we report striking changes across ontogeny in the kinematics, structure and efficacy of zebrafish feeding episodes. Most notably, the discrete tracking maneuvers used by larval fish (turns, forward swims) become fused with prey capture swims to form the continuous, fluid homing strikes of juvenile and adult zebrafish. Across this same developmental time frame, the duration of feeding episodes become much shorter, with strikes occurring at broader angles and from much greater distances than seen with larval zebrafish. Moreover, juveniles use a surprisingly diverse array of motor patterns that constitute a flexible predatory strategy. This enhances the ability of zebrafish to capture more mobile prey items such as Artemia. Visually-guided tracking is complemented by the mechanosensory lateral line system. Neomycin ablation of lateral line hair cells reduced the accuracy of strikes and overall feeding rates, especially when neomycin-treated larvae and juveniles were placed in the dark. Darkness by itself reduced the distance from which strikes were launched, as visualized by infrared imaging. Rapid growth and changing morphology, including ossification of skeletal elements and differentiation of control musculature, present challenges for sustaining and enhancing predatory capabilities. The concurrent expansion of the cerebellum and subpallium (an ancestral basal ganglia) may contribute to the emergence of juvenile homing strikes, whose ontogeny possibly mirrors a phylogenetic expansion of motor capabilities.

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“…A possible source of gustatory input to the reticulospinal system has been described in the channel catfish, Ictalurus punctatus [Kanwal and Finger, 1997]. Most other available data concerns possible overlap between escape and prey capture circuitry [reviewed in Batty and Domenici, 2000], although the evidence for escape circuitry playing a major role in prey capture locomotion is not compelling.…”

Section: Existing Data On the Neural Control Of Prey-capture Locomotionmentioning

confidence: 99%

Prey Capture by Larval Zebrafish: Evidence for Fine Axial Motor Control

Borla¹,

Palecek²,

Budick³

et al. 2002

Brain Behav Evol

142

124

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Swimming and turning behaviors of larval zebrafish have been described kinematically, but prey capture behaviors are less well characterized. High-speed digital imaging was used to record the axial kinematics of larval zebrafish as they preyed upon paramecia and also during other types of swimming. In all types of swim bouts, a series of traveling waves of bending is observed and these bends propagate along the trunk in the rostral to caudal direction. The prey capture swim bouts appeared to be more complex than other swim patterns examined. In the capture swim bouts, the initial bends were of low amplitude and were most prominent at far-caudal locations during each individual traveling wave of bending. Later bends in the bout (occurring just prior to prey capture) appeared to originate more rostrally and were of larger amplitude. These changes in bending pattern during capture swims were accompanied by a marked increase in tail-beat frequency. Associated with these axial kinematics were changes in heading and an abrupt increase in velocity close to the moment of prey capture. These changing patterns of bending suggest precise, bend-to-bend, neural control over both the timing and the rostral-caudal locus of bending. This degree of ‘fine axial motor control’ has not previously been described in the teleost behavioral literature and is notable because it occurs in larval zebrafish, where descending control signals are funneled through the roughly three-hundred neurons that project from brain into spinal cord. These findings will necessitate a significant increase in the complexity of current models of descending motor control in fishes.

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Parallel Medullary Gustatospinal Pathways In a Catfish: Possible Neural Substrates for Taste-Mediated Food Search

Cited by 18 publications

References 57 publications

Distribution of choline acetyltransferase immunoreactivity in the brain of an elasmobranch, the lesser spotted dogfish (Scyliorhinus canicula)

Distribution of choline acetyltransferase immunoreactivity in the brain of an elasmobranch, the lesser spotted dogfish (Scyliorhinus canicula)

Fusion of locomotor maneuvers, and improving sensory capabilities, give rise to the flexible homing strikes of juvenile zebrafish

Prey Capture by Larval Zebrafish: Evidence for Fine Axial Motor Control

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