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45452

Anatomical, Light and Scanning Electron Microscopic Studies on the Air Breathing Dendretic Organ of the Sharp Tooth Catfish (Clarias gariepinus)

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Last updated: 22 Jan 2023

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Abstract

Previously, it has been shown that different species of fishes are adapted in varying degrees for gaseous exchange in both water and air. Our study was carried out on sharp tooth catfish (Clarias gariepinus) obtained from the Nile River, Egypt and fo- cused on the dendretic organ (DO) investigating its anatomical, scanning and light microscopical features. Anatomically, the air-breathing dendretic organ of the catfish was located in the suprabranchial chamber caudodorsal to the gills and composed of two main parts; small and large ones origi- nated by main stems from the second and fourth gill arches respectively. Histologically, the DO either in its main stems or in the smaller branches and in the end bulbs consists of core of elastic cartilage, vascular layer of connective tissue and covering epithelium containing intraepithelial mucous glands. The blood capillaries (channels) were found to originate from the vascular layer and penetrate the covering epithelium. Toward the surface, these capillaries dilate and bulge out due to engorgement with RBCs forming what is called respiratory papillae. The SEM showed that the stem divisions and their bulbus ends contained double parallel rows of paired projections (respiratory lamellae) separated by areas of smooth surface. Moreover, the surfaces were stud- ded with microvilli. In conclusion, the structure of this organ manifests profuse internal subdivision that may produce a particularly large respiratory surface area to extract the oxygen from air. Therefore, the catfish might be one of the most suitable fish for the intensive production in the fish aquaculture.

DOI

10.21608/jva.2008.45452

Keywords

Dendretic organ, catfish, E/M

Authors

First Name

Ahmed

Last Name

Abd-Elmaksoud

MiddleName

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Affiliation

Department of Cytology and Histology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt

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First Name

Mohamed

Last Name

Kassab

MiddleName

-

Affiliation

Department of Histology, faculty of veterinary medicine, Kafr El Sheikh University, Kafr El Sheikh, Egypt

Email

kassabkassab2000@yahoo.com

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Orcid

-

First Name

Ahmed

Last Name

Sayed

MiddleName

Ahmed

Affiliation

Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Alexandria University, Damanhur branch, Bostan, Egypt

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City

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Orcid

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First Name

Masoud

Last Name

Fayed

MiddleName

-

Affiliation

Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Kafr El Sheikh University, Kafr El Sheikh, Egypt

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Volume

1

Article Issue

1

Related Issue

6578

Issue Date

2008-10-01

Receive Date

2008-02-06

Publish Date

2008-10-01

Page Start

29

Page End

37

Print ISSN

1687-9988

Online ISSN

2357-0504

Article File

JVA_Volume 1_Issue 1_Pages 29-37.pdf

PDF . 1.4MB

Link

https://jva.journals.ekb.eg/article_45452.html

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https://jva.journals.ekb.eg/service?article_code=45452

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Original Article

Type Code

782

Publication Type

Journal

Publication Title

Journal of Veterinary Anatomy

Publication Link

https://jva.journals.ekb.eg/

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Article

Created At

22 Jan 2023