Morphology and development of the multiple lateral line canals on the trunk in two species of Hexagrammos (Scorpaeniformes, Hexagrammidae)

Journal of Morphology
Angela L Wonsettler, J F Webb

Abstract

The morphology and development of the multiple lateral line canals (canals 1-5 in dorsal to ventral sequence) on the trunk of two representative hexagrammids, Hexagrammos decagrammus and H. stelleri, were studied using histological and cleared and stained material. The morphology of the lateral line scales of which the lateral line canals are composed and the distribution of canal neuromasts within them were described quantitatively. We hypothesized that 1) one neuromast is contained in each lateral line scale and all five canals contain neuromasts, 2) all five canals develop similarly, and 3) the multiple trunk canals are an adaptation for the alteration of lateral line function. Lateral line scale morphology was found to be similar among the five canals in Hexagrammos decagrammus and H. stelleri. However, canal 3 is significantly wider than the other four canals. It is the only one of the five canals connected to the canals on the head, and more significantly, it is the only one of the five canals that contains neuromasts. The lateral line scales that comprise all five lateral line canals show the same pattern of development whether or not they contain neuromasts. The five canals develop asynchronously, and each of the canals...Continue Reading

References

Jan 1, 1994·Brain, Behavior and Evolution·S Coombs, J Montgomery
Feb 22, 1994·The Journal of Comparative Neurology·R G NorthcuttB B Criley
Apr 15, 1994·Science·A CollazoP M Mabee
Feb 1, 1963·Biological Reviews of the Cambridge Philosophical Society·S DIJKGRAAF

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Citations

Aug 1, 2015·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Caroline Lehoux, Richard Cloutier
Oct 28, 2003·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Jacqueline F Webb, Jonathan E Shirey

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