In this study, four groups of Nile tilapia (O.niloticus) were fed diets in which chitin substituted cellulose (present in basal diet) by 0, 2%, 5%, and 10%. Another 4 groups were fed the same diets with the addition of 1g probiotic / kg diet. The group fed 10 % chitin + probiotic had the best growth performance parameters and feed conversion ratio (FCR). Condition factor (K) was optimal for the fish fed the highest chitin concentration with probiotic in addition to the control group. The group fed 10% chitin+probiotic exhibited a significant increase in the final weight, weight gain, and weight gain % over 0, 2, 10% chitin, and 0% chitin+probiotic groups. The control and the group fed 10% chitin with probiotic have the highest K. They have significantly increased K values over 2%, 5% chitin groups and the probiotic groups (0, 2, 5% chitin + probiotic). Aspartate aminotransferase and alanine aminotransferase activities in fish homogenate were not significantly changed between all groups. Catalase (CAT) activity was increased significantly in 5% chitin+probiotic group overall groups. The group fed 10% chitin with probiotic has the lowest catalase which was non significantly changed in most groups. Also, Glutathione was increased significantly in the groups fed 2% chitin+probiotic and 10% chitin+probiotic over those of the control and 5% chitin. It was increased significantly in the groups fed the basal diet either supplemented with probiotics or supplemented with 5% chitin + probiotic over the control. Similarly, the total protein was significantly increased in 10% chitin group over all other groups. Its content in the control, 2% chitin and 5% chitin groups were significantly increased overall groups fed probiotic diet. Therefore, and based on the presented data, worthy to recommend the use of chitin as an aquafeed additive in aquaculture.

Nile tilapia

10.21608/ejabf.2021.143244

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Ultrastructure of Galaxea Fascicularis from El-Ain El-Sukhna , Gulf of Suez Red Sea = التركيب الدقيق لإحدى المرجانيات المتكلسة Galaxea Fascicularis من منطقة العين السخنة في خليج السويس

International Journal of Development (2014)

Hany A. Abdel-Salam Sahar M. Abdel-Badeea Dalia S. Hamza

10.12816/0026671

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A comprehensive study of histology and ultrastructure in the spine, tube feet, and aristotle's lantern of Echinometra mathaei from the northern Red Sea

Mediterranean Aquaculture Journal (2024)

Mohamed M. Rashad Nahla Said M. Ibrahim Mohammed Salem Saad Mohamed Hany A. Abdel-Salam

Lantern

Histology

10.21608/maj.2024.411259

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Pink Line Syndrome in Porites Lobata from El-Ain El-Sukhna , Gulf of Suez , Red Sea = ظهور متلازمة الخط الوردي في إحدى المرجانيات المتكسلة Porites Lobata الموجودة في منطقة العين السخنة ، البحر الأحمر ، مصر

International Journal of Development (2014)

Hany A. Abdel-Salam Shimaa Y. Hanafi Dalia S. Hamza

Porites

Lobata

10.12816/0026672

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Reproductive traits and Microstructure of Acropora digitifera and Acropora gemmifera (Scleractinia, Anthozoa) inhabiting the Northern Red Sea (Hurghada, Egypt).

Egyptian Journal of Aquatic Biology and Fisheries (2020)

Mohamed M. Rashad Walaa M. Shaban Abdel-Hamid A. M. Ali Hany A. Abdel-Salam

Spawning Red SeaReef-building scleractinian corals proliferate and maintain their populations, in part, through sexual reproduction.They typically reproduce sexually as either gonochoric (separate male and female) or hermaphroditic (producing both eggs and sperm) colonies.Both types of sexual reproduction achieved as spawning processes that take place once a year and this process affected by environmental conditions such as temperature, photoperiod and pH level.In relation, the current study was designed to explore the reproduction patterns of two Acroporoid coral species; Acropora digitifera and Acropora gemmifera, which inhabiting the northern Red Sea (Hurghada, Egypt).A scanning electron microscope (SEM) was used to identify both coral species and to obtain their microstructure details.For reproduction study purpose, gonads maturity status and spawning timing of both studied species were noticed, either by direct field observations, during the study period including two consecutive spawning seasons, or observed in aquaria, by taking live coral colony samples for watching their specific spawning release.Results indicated that both investigated species are hermaphroditic broadcasting spawner (release buoyant egg-sperm bundles) and showed gradual gonads maturity development begin from October until their spawning time in late April.All polyps became empty from egg sperm bundles in early May.There was a clear relationship between the spawning time of the two coral species and the lunar cycle, temperature, and photoperiod.Spawning of study species occurred on nights (nearly 3-4 hours after sunset) during the new moon and full moon phases.The present study concluded that A. digitifera and A. gemmifera spawned before April full moon within two days.

Acropora

Scleractinia

Anthozoa

Full moon

10.21608/ejabf.2020.97537

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Structure of the Reef - Building Coral Acropora Humilis and Associated Bio-Eroding Microorganisms from Gulf of Suez , Red Sea = التركيب الهيكلي للمرجان Acropora Humilis و الكائنات الحية الدقيقة المرتبطة بتآكله من العين السخنة ، خليج السويس ، البحر الأحمر

International Journal of Development (2014)

Hany A. Abdel-Salam Nermeen Kh. Khalil Dalia S. Hamza

Acropora

Scleractinia

10.12816/0026678

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Hurghada coral diseases; are they due to the impacts of global warming or mass tourism?

Egyptian Academic Journal of Biological Sciences. B, Zoology (2010)

Hany A. Abdel-Salam Abdel-Hamid A. M. Ali Amin Ismail

This study is trying to assess the types and frequencies of occurrence of coral diseases.Are these diseases due to the impacts of global warming or tourism on coral reefs along the Red Sea coast off Hurghada?Results indicated that there is a high disease prevalence (46 %) with the presence of four coral diseases/ syndromes; White Syndrome (21.6%),Bleaching (16.2 %), Black Band Disease (8.2%) and overgrowth of sponge were near the sampling transects.Data of the Coral Reef Watch about the Sea Surface Temperature (SST) anomaly produced by National Oceanographic and Atmospheric Administration (NOAA) indicated that there was 1°C increase in SST in 2009 and 1.5°C increase in 2010 in the northern Red Sea region.The increased prevalence of coral diseases in the Red Sea coast off Hurghada might be attributed to sea surface temperature (SST) anomaly due to global warming.It might be also due to activities associated with tourism such as exaggerated coastal development through construction of hotels and increased sewage run off and unregulated recreational activities such as SCUBA diving, snorkeling, and reef walking.Coral reefs must be considered and incorporated into management plans.To conserve these valuable marine resources, we have to adopt the sustainability concept of ecotourism instead of mass and random tourism activities.

Coral bleaching

10.21608/eajbsz.2010.15871

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