Morphological Characteristics of Lateral Line in Three Species of Fish

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  • カワムツ，コイおよびハゼ科ヨシノボリ属における側線の形態学的特徴

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The results presented herein report quantitative data relative to the distribution and morphological characteristics of superficial neuromasts (SNs) and canal pores (CPs) in goby Rhinogobius sp., common carp Cyprinus carpio and dark chub Zacco temminckii. Using scanning electron microscopy, large carp and dark chub were observed to possess more SN per canal scale compared to their small counterparts. Among the three species, carp consistently had the highest number of SNs and CPs. However, the density of SNs in SN-bearing scales is quite similar among the three species, even though the total length of goby was only a third of the two other species. The number and distribution of SNs and CPs on the surface of the head, the trunk and caudal fin varied among species. Orientation of cells within SNs on the head showed various directions relative to the fish body axis. On the trunk and caudal fin, most of the sensory epithelia on the neuromasts had orientations parallel the fish body axis although a number of those on the trunk in carp and dark chub were oriented dorso-ventrally. The possible relationship between the various types of lateral line and lifestyle of each species is discussed.

Journal

  • Aquaculture Science

    Aquaculture Science 58 (1), 25-35, 2010

    Japanese Society for Aquaculture Science

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