Evolution of the developmental plasticity and a coupling between left mechanosensory neuromasts and an adaptive foraging behavior

Developmental Biology
Vânia Filipa Lima FernandesMasato Yoshizawa

Abstract

Many animal species exhibit laterality in sensation and behavioral responses, namely, the preference for using either the left or right side of the sensory system. For example, some fish use their left eye when observing social stimuli, whereas they use their right eye to observe novel objects. However, it is largely unknown whether such laterality in sensory-behavior coupling evolves during rapid adaptation processes. Here, in the Mexican tetra, Astyanax mexicanus, we investigate the laterality in the relationship between an evolved adaptive behavior, vibration attraction behavior (VAB), and its main sensors, mechanosensory neuromasts. A. mexicanus has a surface-dwelling form and cave-dwelling forms (cavefish), whereby a surface fish ancestor colonized the new environment of a cave, eventually evolving cave-type morphologies such as increased numbers of neuromasts at the cranium. These neuromasts are known to regulate VAB, and it is known that, in teleosts, the budding (increasing) process of neuromasts is accompanied with dermal bone formation. This bone formation is largely regulated by endothelin signaling. To assess the evolutionary relationship between bone formation, neuromast budding, and VAB, we treated 1-3 month old j...Continue Reading

Citations

Jun 5, 2019·The Journal of Animal Ecology·Joannes Van CannPhillip C Watts
Apr 30, 2020·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Ernesto MaldonadoAtaulfo Martínez-Torres
Feb 8, 2020·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Amanda K PowersJoshua B Gross
Dec 24, 2021·The Journal of Experimental Biology·Nicholas P Planidin, Thomas E Reimchen

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