Prof. Tarek G. Ismail

Professor - Professor

Faculty of science

Address: Zoology Department - Faculty Of Science - Sohag University


Behavioural activities of five hermit crabs from Egyptian Red Sea Coast.
The present study describes some activity patterns in the field and laboratory of five hermit crab species (_Calcinus latens, Clibanarius signatus, Clibanarius longitarsus, Diogenes costatus_and _Diogenes pallescens_) inhabiting an intertidal flat of mangrove swamp at Red Sea coast. The recorded activity patterns were clustering, scattering, locomotion, standing up at sediment surface with legs outside the shell, retracted into the shell, ... Read more

Coexistence of two haplosporidian parasites in a population of the marine amphipod Parhyale hawaiensis with evidence for parasite phagocytosis and transmission mode.
The amphipod _Parhyale hawaiensis_ live hiding underneath stones and shingles along the shore line in supra-littoral zone of Sharm El-Nagha site, Hurghada city, Red Sea. The collected specimens of _P. hawaiensis_ are infected with two protozoan parasites, _Urosporidium_ sp. and _Haplosporidium_ sp. which invade many organs of both females and males. The life cycle of the parasites was described in ... Read more

Distribution and shell selection by two hermit crabs in different habitats on Egyptian Red Sea Coast.
The present work aims to assess the spatial distribution, analyze shell utilization, shell fitness and determine the effect of coexistence of two hermit crabs _Calcinus latens_ and _Clibanarius signatus_ on used shell resources in various habitats on the Red Sea Coast. Also, to determine the choice of shells and investigate the shell species preference of _C. latens_ and _C. signatus_ ... Read more

Qualitative and quantitative aspects of some invertebrate communities inhabiting different marine habitats, Red Sea, Egypt.
The recorded invertebrate fauna in the three collection sites belonging to eight phyla, which are: Protozoa, Porifera, Coelenterata, Nematoda, Annelida, Arthropoda, Mollusca and Echinodermata. Phylum Arthropoda and its subphylum Crustacea are dominant in all sites. The total number of species and individuals inside the community displayed a high diversity in all sites. The diversity index values depended on the number ... Read more