To assess the anthropogenic impact on Egyptian coast of Gulf Aqaba, particularly tourism and fishing influences. Eighteen sites were surveyed from November 2019 to February 2020. At each site, coral cover was determined using Point Intercept Transect (PIT) method, at depths 3 8 m. Also, abundances invertebrate species by belt transect method same for site. Mean percentages corals (hard soft) Da...

Existing knowledge on reproductive isolating barriers between sea urchin species is reviewed. Experiments involving artificial production of hybrids between congeneric echinoid species have shown that in most cases hybrids are viable and capable of backcrossing. Only species separated for > 5 million yrs show complete post-zygotic isolation. Each potential prezygotic isolating barrier appears t...

Antiretrovirals (ARVs) have been detected in aquatic ecosystems throughout the world; however, studies focused on assessing their ecotoxicological effects marine organisms are still rare. In present study, predicted environmental concentration (PEC) of 13 ARVs was estimated for surface seawater from Santos Bay, Brazil, according to European Medicines Agency (EMEA) guidelines. The results indica...