External morphology of Sacculina leptodiae (Sacculinidae: Rhizocephala) parasitizing the xanthid crab, Leptodius exaratus (Xanthidae: Brachyura) from the coasts of the Red Sea, Gulfs of Suez and Aqaba, Egypt
M.Hassan, A., A.M. El-Sayed, A., A. Amer, M., M. A. Fouda, M. (2021). External morphology of Sacculina leptodiae (Sacculinidae: Rhizocephala) parasitizing the xanthid crab, Leptodius exaratus (Xanthidae: Brachyura) from the coasts of the Red Sea, Gulfs of Suez and Aqaba, Egypt. EKB Journal Management System, 25(1), 331-349. doi: 10.21608/ejabf.2021.142204
Ahmed M.Hassan; Awaad A.M. El-Sayed; Mohamed A. Amer; Maged M. A. Fouda. "External morphology of Sacculina leptodiae (Sacculinidae: Rhizocephala) parasitizing the xanthid crab, Leptodius exaratus (Xanthidae: Brachyura) from the coasts of the Red Sea, Gulfs of Suez and Aqaba, Egypt". EKB Journal Management System, 25, 1, 2021, 331-349. doi: 10.21608/ejabf.2021.142204
M.Hassan, A., A.M. El-Sayed, A., A. Amer, M., M. A. Fouda, M. (2021). 'External morphology of Sacculina leptodiae (Sacculinidae: Rhizocephala) parasitizing the xanthid crab, Leptodius exaratus (Xanthidae: Brachyura) from the coasts of the Red Sea, Gulfs of Suez and Aqaba, Egypt', EKB Journal Management System, 25(1), pp. 331-349. doi: 10.21608/ejabf.2021.142204
M.Hassan, A., A.M. El-Sayed, A., A. Amer, M., M. A. Fouda, M. External morphology of Sacculina leptodiae (Sacculinidae: Rhizocephala) parasitizing the xanthid crab, Leptodius exaratus (Xanthidae: Brachyura) from the coasts of the Red Sea, Gulfs of Suez and Aqaba, Egypt. EKB Journal Management System, 2021; 25(1): 331-349. doi: 10.21608/ejabf.2021.142204

External morphology of Sacculina leptodiae (Sacculinidae: Rhizocephala) parasitizing the xanthid crab, Leptodius exaratus (Xanthidae: Brachyura) from the coasts of the Red Sea, Gulfs of Suez and Aqaba, Egypt

Egyptian Journal of Aquatic Biology and Fisheries
Article 19, Volume 25, Issue 1, January and February 2021, Page 331-349  XML PDF (1.26 MB)
Document Type: Original Article
DOI: 10.21608/ejabf.2021.142204
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Authors
Ahmed M.Hassan; Awaad A.M. El-Sayed; Mohamed A. Amer; Maged M. A. Fouda
Abstract
A total of 41 externae (35 single and 3 double) of the parasitic sacculind, Sacculina leptodiae (Sacculindae: Rhizocephala) were investigated during this study. They were obtained from 38 individuals (23 males and 15 females) of the xanthid crab, Leptodius exaratus (Xanthidae: Brachyura) collected from the Egyptian coasts of the Red Sea and Gulfs of Suez and Aqaba. The rate of infection represented 5.50% of all populations (691 individuals, 400 males and 291 females) and was slightly higher in males (5.75 %) than in females (5.15 %). The single 35 externae represented 92.11 %, compared with only 3 individuals have double externae represented 7.89 %. The externae of this parasite were extruded on the abdomens of infected crabs, each was attaching with its interna (rootlets) in the internal body cavity of the host via a very short stalk or peduncle. The externae varied in shapes, size and color based on the developmental maturity stages, which comprised immature (1 - ≤ 3.5 mm), early maturing (>3.5- ≤ 5.0 mm), maturing (>5 – 10.4 mm) and spent (flattened shape)stages. The size of externae varied from 1.0 to 10. 4 mm in breadth and averaged 5.19± 2.76 mm in males and 5.63± 3.17 mm in females. The externae have a dense cover of spaced bundles carrying excrescences composed of hard chitin, varied from 15.6 – 47.0 µm, and averaged 32.74± 8.45 µm. The internae comprised network of rootlets of this parasite invaded ovaries, testes, hepatopancreas and all crab’s body cavities.    
Keywords
Rhizocephala; Scculina; Leptodius exaratus; Red Sea; Gulf of Suez; Egypt
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