Ultrastructure of the Oropharyngeal Cavity Floor of the Red Porgy (Pagrus pagrus) by Light and Scanning Electron Microscopy

المجلة: Microscopy and Microanalysis

سنة النشر: 2022

تاريخ النشر: 2022-09-25

Abstract The current research aim is an ultrastructural examination of the floor of the oropharyngeal cavity of the red porgy fish. The study used gross morphology, light and scanning electron microscopy, and morphometric analysis. The teeth are arranged in anterior and posterior rows with differing heights along the entire length of the lower jaw. The labial teeth were long papilliform (canine like), medium, and short papilliform teeth. The teeth had a central pulp cavity and were surrounded by a thick dentine ridge covered in enamel. The pharyngeal teeth appeared in a V-shaped structure after the end of the interbranchial septum. There were three sizes of pharyngeal teeth: long, medium, and short. The apical pouch appeared on the lateral sides of the tongue. The tongue had a bulged mountaintop in the center and lateral sides with sea-wave￾like longitudinal ridges with sloping grooves between them. The whole tongue surface had longitudinal ridges and sharp transverse ridges that appeared thorn like at the tongue root. Many sizes of pointed papillae were visible along the tongue surface. Ruffini corpuscles have been discovered in the tongue’s conical and dome-shaped papillae. The red porgy’s teeth and tongue papillae have distinct structural characteristics that are reflected in their carnivorous behavior. Key words: light microscopy, Pagrus pagrus, oropharyngeal cavity, scanning electron microscopy

Macro- and micro-morphological comparison of the detailed structure of the oral cavity roof in two different feeding habits marine fishes: Pagrus pagrus and Boops boops

المجلة: Journal of Experimental Zoology Part A Ecological and Integrative Physiology

سنة النشر: 2024

تاريخ النشر: 2024-04-20

The feeding habits and habitats of fish influence the morphology of the oral cavity. This study used gross anatomy, light microscopy, and scanning electron microscopy, in addition to morphometric analysis, to investigate the anatomical characteristics of the oral cavity roof in Pagrus pagrus and Boops boops , which have different dietary habits. The oral cavity roof appeared U‐shaped and divided into the palate and upper pharyngeal regions. The upper lip of P. pagrus was broad, while B. boops' upper lip was small and thin. Both species had a stratified squamous epithelium with an irregular shape and a folded surface. P. pagrus had a horseshoe‐shaped upper velum with a high middle part, and its surface resembled sea waves with obvious mucous‐secreting openings with cilia and many folds and grooves between them. B. boops's upper velum was thin and appeared as a triangle pouch with a pointed cranial apex. The palate in both species was narrow in the front and increased in width backward until it ended. The upper pharyngeal teeth in P. pagrus appeared as two patches, separated by a median longitudinal ridge and an anterior V‐shape separator. Meanwhile, in B. boops , they appeared as a ball patch on both sides and a separator ridge in the middle. Because P. pagrus fed on harder structures than B. boops , their feeding habits were reflected in the structure of the oral cavity roof. P. pagrus , a carnivorous species, had several rows of sharp upper jaw and upper pharyngeal teeth, thick spinous tubercles on oblique transverse ridges, and massive mucous glands. On the other hand, B. boops , an omnivorous species, had only one row of upper jaw teeth, a few upper pharyngeal teeth scattered on two oval patches, and thin filaments on the oblique transverse ridges.

Micro-morphological characteristics of the oropharyngeal cavity floor of bogue (Boops boops) (Linnaeus, 1758) fish: gross morphology, light, and scanning electron microscopic imaging

المجلة: Zoomorphology

سنة النشر: 2022

تاريخ النشر: 2022-11-28

Overview Stats Comments Citations (2) References (55) Share More New The publisher of your research added a full-text Springer Nature provided the most up-to-date published version of your research. This means: More people can discover and read your work, and it's easier for you to track its impact. If a publisher full-text was added, any reader with an institutional subscription to Springer Nature journals can now access your full-text on ResearchGate. Open access full-texts added by Springer Nature can be discovered and read by anyone. You can no longer edit the details of the publication page, nor remove a full-text added by a publisher. You can learn more about the partnership between ResearchGate and the publisher here. spotlight-branding-logo Research Spotlight Beta Want to get 4x more reads of your article? Showcase your recent work in a Spotlight to get 4x more reads on average. Learn more Create Spotlight Abstract and figures The current study is the first to use gross anatomy, light, and scanning electron microscopy to describe the oropharyngeal cavity of a bogue (Boops boops Linnaeus, 1758) fish. Fourteen 17–18 cm long bogue fish were used. The lower jaw held the lower lip, labial teeth, tongue, and pharyngeal teeth, and the oral cavity floor appeared u-shaped. The lower jaw was small and narrow in the anterior and wide in the posterior as it approached the esophagus. The lower lip carried different lengths of cilia-like projections that looked like the cactus plant arranged in transverse layers, and its apex appeared as an open rose. These cilia were encircled by ridges that looked like sea waves. The labial teeth were 15 in a row, with long roots placed beneath a pocket-like structure. Long, medium, and short pharyngeal papilliform teeth emerged on the oropharyngeal cavity floor at the level of the fourth gill arch in a small V-shaped arrangement. The tongue was smooth and small, with an apex, body, root, and lateral edges that were all clearly defined. The tongue’s apex was pointed and triangular, with a thin, transparent apical pouch around it. There was a median longitudinal fold on the dorsum of the tongue body and root. On the tongue surface, taste bud types I and II emerged. The bogue fish’s oropharyngeal cavity had unique anatomical characteristics, indicating that it was omnivorous.