Monogenea is one of the most species-rich groups of parasitic flatworms worldwide with many species described from African freshwater fish. Little is known about the diversity and geographic distribution of monogenean parasites infesting the Red Sea fishes in Egypt. In the present study, a total of 45 specimens of the brushtooth lizardfish Saurida undosquamis (family: Synodontidae) and...

A new scleractinian coral species, Cyphastreakausti sp. n., is described from 13 specimens from the Red Sea. It is characterised by the presence of eight primary septa, unlike the other species of the genus, which have six, ten or 12 primary septa. The new species has morphological affinities with Cyphastreamicrophthalma, from which it can be distinguished by the lower number of septa (on avera...

The aim of this study is to reveal gene flow between populations of the coral reef dwelling lionfish Pterois miles in the Gulf of Aqaba and northern Red Sea. Due to the fjord-like hydrography and topology of the Gulf of Aqaba, isolation of populations might be possible. Analysis of 5' mitochondrial control region sequences from 94 P. miles specimens detected 32 polymorphic sites, yielding 38 ha...

Figure 1. Cross-sectional model of continental-margin response to high-amplitude fluctuations in eustatic sea level. The panels represent (A) floodand (B) stormdominated margins. Large panels show stratigraphic architecture resulting from two sea-level cycles superimposed on steady background subsidence. Red circles denote shoreface location. Stratal spacing: ∆t = 0.6. Insets show eustatic sea ...

Earth is expected to continue warming and the Red Sea is a model environment for understanding the effects of global warming on ocean microbiomes due to its unusually high temperature, salinity and solar irradiance. However, most microbial diversity analyses of the Red Sea have been limited to cultured representatives and single marker gene analyses, hence neglecting the substantial uncultured ...

In a group of normal subjects going from sea level to approximately 16,000 feet we observed that very soon after arrival at high altitude there was hemoconcentration, as indicated by an increased red cell count and hematocrit, but a normal total red cell volume and a low plasma volume. This "apparent increase" in the number of red blood cells in the early days after arrival at high altitude is,...

The fossil record of Red Sea fringing reefs provides an opportunity to study the history of coral-reef survival and recovery in the context of extreme environmental change. The Middle Pleistocene, the Late Pleistocene, and modern reefs represent three periods of reef growth separated by glacial low stands during which conditions became difficult for symbiotic reef fauna. Coral diversity and pal...

Marine cryptic species, taxa that are morphologically identical but genetically distinct, may be important and underestimated components of the ecosystem. The understanding of several ecological interactions, such as marine bioinvasions, could be altered by the correct description of the bioinvaders. Here, we have focused our study on the hardyhead silverside, Atherinomorus lacunosus, a Lesseps...

Reticulate evolution, introgressive hybridisation, and phenotypic plasticity have been documented in scleractinian corals and have challenged our ability to interpret speciation processes. Stylophora is a key model system in coral biology and physiology, but genetic analyses have revealed that cryptic lineages concealed by morphological stasis exist in the Stylophora pistillata species complex....

Iron can limit primary production in shallow marine systems, especially in tropical waters characterized by carbonated sediments, where iron is largely trapped in a non-available form. The Red Sea, an oligotrophic ecosystem characterized by a strong N-S latitudinal nutrient gradient, is a suitable setting to explore patterns in situ of iron limitation in macrophytes and their physiological perf...