Morphological comparison for the dorsal fin of Chrysichthys auratus, Synodontis schall, and Synodontis serratus (Teleosti: Siluriformes) collected from the Lake Nasser and the River Nile, Egypt
The anatomy, growth, and differentiation of the dorsal fin spines of three catfish species collected from the Nile River and Lake Nasser. Egyptian waters are described, and terminology is suggested for their parts. Features of the dorsal fin spine that change with growth are also described. The resu...
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| Language: | English |
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Sciendo
2023-12-01
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| Series: | Oceanological and Hydrobiological Studies |
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| Online Access: | https://doi.org/10.26881/oahs-2023.4.03 |
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| author | Farrag Mahmoud M. S. Jawad Laith A. Park Joo M. |
| author_facet | Farrag Mahmoud M. S. Jawad Laith A. Park Joo M. |
| author_sort | Farrag Mahmoud M. S. |
| collection | DOAJ |
| description | The anatomy, growth, and differentiation of the dorsal fin spines of three catfish species collected from the Nile River and Lake Nasser. Egyptian waters are described, and terminology is suggested for their parts. Features of the dorsal fin spine that change with growth are also described. The results showed that in all species studied, the dorsal spine is an elongate, compressed, tapered, slightly arched, osseous structure, bearing a series of retrorse dentations along the anterior and posterior surfaces and has a sharp sagittate tip. The retrorse, anterior dentations are most pronounced in the upper third of the spine and gradually alter in form until they appear as a series of distinct notches on the basal third of the spine. The anterolateral surfaces of the dorsal spine are marked by numerous short, irregular, shallow, anastomosing, longitudinal furrows. In three species (C. auratus, S. schall, S. serratus), the posterior process is poorly developed and directed laterally in young individuals and well produced and directed posteriorly in older specimens. In S. schall and S. serratus, the posterior blocking process of the large specimens has a wavy edge, while in S. serratus, it is curved in young individuals and straight in larger specimens. |
| format | Article |
| id | doaj-art-a26e038c29d243aba7268dd8b32998ee |
| institution | Kabale University |
| issn | 1897-3191 |
| language | English |
| publishDate | 2023-12-01 |
| publisher | Sciendo |
| record_format | Article |
| series | Oceanological and Hydrobiological Studies |
| spelling | doaj-art-a26e038c29d243aba7268dd8b32998ee2025-01-20T11:10:23ZengSciendoOceanological and Hydrobiological Studies1897-31912023-12-0152442042910.26881/oahs-2023.4.03Morphological comparison for the dorsal fin of Chrysichthys auratus, Synodontis schall, and Synodontis serratus (Teleosti: Siluriformes) collected from the Lake Nasser and the River Nile, EgyptFarrag Mahmoud M. S.0Jawad Laith A.1Park Joo M.2Marine Science & Fishes (Branch), Zoology Department, Faculty of Science, Al-Azhar University(Assuit), Postal code: 71524, EgyptSchool of Environmental and Animal Sciences, Unitec Institute of Technology, 139 Carrington Road, Mt Albert, Auckland1025, New ZealandEast Sea Research Institute, Korea Institute of Ocean Science and Technology, Uljin36315, Republic of KoreaThe anatomy, growth, and differentiation of the dorsal fin spines of three catfish species collected from the Nile River and Lake Nasser. Egyptian waters are described, and terminology is suggested for their parts. Features of the dorsal fin spine that change with growth are also described. The results showed that in all species studied, the dorsal spine is an elongate, compressed, tapered, slightly arched, osseous structure, bearing a series of retrorse dentations along the anterior and posterior surfaces and has a sharp sagittate tip. The retrorse, anterior dentations are most pronounced in the upper third of the spine and gradually alter in form until they appear as a series of distinct notches on the basal third of the spine. The anterolateral surfaces of the dorsal spine are marked by numerous short, irregular, shallow, anastomosing, longitudinal furrows. In three species (C. auratus, S. schall, S. serratus), the posterior process is poorly developed and directed laterally in young individuals and well produced and directed posteriorly in older specimens. In S. schall and S. serratus, the posterior blocking process of the large specimens has a wavy edge, while in S. serratus, it is curved in young individuals and straight in larger specimens.https://doi.org/10.26881/oahs-2023.4.03ostariophysifinsanatomygrowth and differentiationtaxonomic identification |
| spellingShingle | Farrag Mahmoud M. S. Jawad Laith A. Park Joo M. Morphological comparison for the dorsal fin of Chrysichthys auratus, Synodontis schall, and Synodontis serratus (Teleosti: Siluriformes) collected from the Lake Nasser and the River Nile, Egypt Oceanological and Hydrobiological Studies ostariophysi fins anatomy growth and differentiation taxonomic identification |
| title | Morphological comparison for the dorsal fin of Chrysichthys auratus, Synodontis schall, and Synodontis serratus (Teleosti: Siluriformes) collected from the Lake Nasser and the River Nile, Egypt |
| title_full | Morphological comparison for the dorsal fin of Chrysichthys auratus, Synodontis schall, and Synodontis serratus (Teleosti: Siluriformes) collected from the Lake Nasser and the River Nile, Egypt |
| title_fullStr | Morphological comparison for the dorsal fin of Chrysichthys auratus, Synodontis schall, and Synodontis serratus (Teleosti: Siluriformes) collected from the Lake Nasser and the River Nile, Egypt |
| title_full_unstemmed | Morphological comparison for the dorsal fin of Chrysichthys auratus, Synodontis schall, and Synodontis serratus (Teleosti: Siluriformes) collected from the Lake Nasser and the River Nile, Egypt |
| title_short | Morphological comparison for the dorsal fin of Chrysichthys auratus, Synodontis schall, and Synodontis serratus (Teleosti: Siluriformes) collected from the Lake Nasser and the River Nile, Egypt |
| title_sort | morphological comparison for the dorsal fin of chrysichthys auratus synodontis schall and synodontis serratus teleosti siluriformes collected from the lake nasser and the river nile egypt |
| topic | ostariophysi fins anatomy growth and differentiation taxonomic identification |
| url | https://doi.org/10.26881/oahs-2023.4.03 |
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