Abstract
The lateral line system and its innervation were examined in the masu salmon Oncorhynchus masou masou. The species has 8 cephalic canals (supraorbital, infraorbital, otic, preopercular, mandibular, postotic, supratemporal, and temporal portion of trunk), 1 trunk canal and 9 superficial neuromast groups (rostral, nostril, preinfraorbital, postocular, cheek and supratemporal groups in the cephalic groups, and predorsal, trunk accessory and caudal fin groups in the trunk groups). The components are generally similar to those in many other teleosts, the lateral line system of O. m. masou is distinctive in having a preinfraorbital superficial neuromast group and lacking infraorbital, mandibular and opercular superficial neuromast groups. The lateral line system of O. m. masou is compared with some other species of Oncorhynchus.
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Acknowledgments
G. Hardy (Ngunguru, New Zealand) read the manuscript and offered helpful comments. The staff of the Tokushibetsu and Shiribetsu field stations assisted in collecting specimens. This study was partly supported by JSPS KAKENHI Grant Number 17H03859, 19K06214 and 26840132 (to MN), and the Integrated Research Project “Adaptive trends, evolution, and modeling of organisms to respond natural and artificial environments” of the National Museum of Nature and Science.
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Nakae, M., Hasegawa, K. The lateral line system and its innervation in the masu salmon Oncorhynchus masou masou (Salmonidae). Ichthyol Res 69, 362–371 (2022). https://doi.org/10.1007/s10228-021-00843-0
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DOI: https://doi.org/10.1007/s10228-021-00843-0