The larval attachment organ of the tropical gar Atractosteus tropicus Gill, 1863 (Lepisosteiformes: Lepisosteidae)
| Autor: | Dustin S. Siegel, Amanda K. Pinion, Carlos Alfonso Álvarez-González, Kevin W. Conway, Rafael Martínez-García, Ralf Britz |
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| Rok vydání: | 2021 |
| Předmět: |
Gills
0106 biological sciences Lepisosteidae Larva animal structures Hatching 010604 marine biology & hydrobiology Fishes Zoology Aquatic Science Biology biology.organism_classification 010603 evolutionary biology 01 natural sciences Animals Ecology Evolution Behavior and Systematics Atractosteus tropicus |
| Zdroj: | Journal of Fish Biology. 99:418-424 |
| ISSN: | 1095-8649 0022-1112 |
| Popis: | Larval attachment organs (LAOs) are unicellular or multicellular organs that allow larvae to adhere to a substrate before yolk-sac absorption and the free-swimming stage. This study documents the LAO of tropical gar, Atractosteus tropicus, using a combination of scanning electron microscopy and light microscopy. It is shown that the LAO of A. tropicus is a super-organ surrounded by a wall and containing at its centre many smaller multicellular organ units, each comprised of attachment and support cells. Attachment cells are secretory and house large vacuoles filled with a glycoprotein. At hatching, the super-organ is well developed and occupies almost the entire anteroventral surface of the head. During subsequent development, the smaller individual units begin to regress, until at 6 days post-hatching the super-organ and its individual units are no longer visible. |
| Databáze: | OpenAIRE |
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