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Egyptian Journal of Aquatic Biology and Fisheries
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B. Darwish et al., A. (2021). Indoor Aquaria and Offshore Cages Bacterial Disease of Cultivated Giant Clam. Egyptian Journal of Aquatic Biology and Fisheries, 25(3), 383-394. doi: 10.21608/ejabf.2021.175845
Ahmed B. Darwish et al.. "Indoor Aquaria and Offshore Cages Bacterial Disease of Cultivated Giant Clam". Egyptian Journal of Aquatic Biology and Fisheries, 25, 3, 2021, 383-394. doi: 10.21608/ejabf.2021.175845
B. Darwish et al., A. (2021). 'Indoor Aquaria and Offshore Cages Bacterial Disease of Cultivated Giant Clam', Egyptian Journal of Aquatic Biology and Fisheries, 25(3), pp. 383-394. doi: 10.21608/ejabf.2021.175845
B. Darwish et al., A. Indoor Aquaria and Offshore Cages Bacterial Disease of Cultivated Giant Clam. Egyptian Journal of Aquatic Biology and Fisheries, 2021; 25(3): 383-394. doi: 10.21608/ejabf.2021.175845

Indoor Aquaria and Offshore Cages Bacterial Disease of Cultivated Giant Clam

Article 26, Volume 25, Issue 3, May and June 2021, Page 383-394  XML PDF (669.29 K)
Document Type: Original Article
DOI: 10.21608/ejabf.2021.175845
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Author
Ahmed B. Darwish et al.
Abstract
Giant clam marine culture is commonly influenced by a wide variety of pathogenic bacteria including Vibrio species, resulting in high losses. The current study was organized to investigate the bacterial infections, in the Hurghada area, between the culture of Tridacna maxima and Tridacna gigas in indoor aquaria and offshore cages. Eighty samples of T. maxima and T. gigas in both indoor aquaria and offshore cages were collected for bacteriological analysis. Samples were taken from gills, gut, mantels, and gonads of Tridacna. The results showed reduced motion followed by loss of attractive color pattern with 25 % and 20 % mortality rate among indoor cultured T. maxima and T. gigas, respectively. About forty-six bacterial isolates were identified, using phenotypic and biochemical testing.  Most of those isolates were Vibrio logei, V. harveyi, and unidentified Vibrio. The pathogenicity and virulence of V. logei seem high with a 30% mortality rate. The current study would provide useful information for better management of bacterial infections in T. maxima and T. gigas.
Keywords
Giant clams; Tridacna maxima; T. gigas; Vibrio logei; V. harvey
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