Tytiuk Olha, Sapoznikov Olga, Tichý František, Kloučková Michaela, Stepanyuk Yaroslav
Department of Zoology, Biological Faculty, Lesya Ukrainka Eastern European National University, 43025 Lutsk, Ukraine,
Department of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Science Brno, 612 42 Brno, Czech Republic.
Zoolog Sci. 2020 Feb;37(1):14-23. doi: 10.2108/zs190073.
Olfaction plays an important role in a fish's life. Its value may differ at different developmental stages, depending on the feeding style of the species. The goal of the present study was to investigate the olfactory organ of a species that feeds mainly on algae- the bushymouth catfish, at developmental stages from olfactory placode to the definitive olfactory chamber. For this study, we used light and electron (scanning) microscopy. The topography of the olfactory placode of is typical for teleostei. Formation of olfactory pit takes place at the same time as rostral elevation formation. Rostral elevation participates in the formation of the nasal bridge and anterior tubular nostril. It was found out that the anlage of olfactory rosette in arises earlier than in most teleostei. However, the number of lamellae does not increase until switching to exogenous feeding. We suppose that the early development of olfactory organ is necessary for intraspecific communication, not just for finding food.
嗅觉在鱼类生活中起着重要作用。其价值在不同发育阶段可能有所不同，这取决于物种的摄食方式。本研究的目的是调查一种主要以藻类为食的物种——须鲶鱼，从嗅基板到定型嗅腔的发育阶段的嗅觉器官。在这项研究中，我们使用了光学显微镜和电子（扫描）显微镜。须鲶鱼嗅基板的地形对于硬骨鱼来说是典型的。嗅窝的形成与吻部隆起的形成同时发生。吻部隆起参与鼻梁和前管状鼻孔的形成。研究发现，须鲶鱼嗅叶的原基比大多数硬骨鱼出现得更早。然而，在开始外源摄食之前，鳃片的数量不会增加。我们认为，嗅觉器官的早期发育对于种内交流是必要的，而不仅仅是为了寻找食物。
