The role of sharks in the ecosystem

Research Article: Trophic dynamics analysis and ecosystem structure for some fish species of northern Oman Sea

In the present study, a trophic structure model for some fish species of the northern Oman Sea is developed through using mass balance modeling software, Ecopath with Ecosim (EwE). In this model, we simulated 16 functional groups spread across an area of 3998.20 km2 from 2017 to 2018. Mean trophic level in the area of the present study was 3.49. Values calculated for system omnivory and connect...

Five decades of decline in sharks of Iran

Shark stocks in Iranian water of the Persian Gulf and Gulf of Oman are declining sharply. Although fishing and heavy fines have been banned by the organizations in charge of fishing for these fish, bycatch in some fishing methods, including Neritic and oceanic Gillnet, trawl fish and shrimp, long loine and trolling, still catch sharks. Slowly In this study, during a period of 10 years from 2010...

Short communication:First report of thresher sharks (Alopiidae) in the Gulf of Antalya

A Brief Look at Human Impacts on Sharks

This brief review examines the many human activities that threaten sharks, their impacts, and the implications for the ecosystems that rely upon these apex predators. As keystone species, sharks play a crucial role in maintaining healthy ecosystems by asserting top-down forces on trophic webs and keeping prey populations healthy and in balance. However, sharks’ slow growth rates, low fecundity ...

Influential feeding dynamics of sharks and mathematical formulas to estimate the power of biting by morphological data

The mouths of some bony and cartilaginous fishes are located in the anterior part of theirbodies, with a slight variation in sharks, which have theirs located in the abdominal part. Thisvariation is evolutionary over time. The force exerted by the jaws of sharks in order todismember their prey can be examined from two origins: .The determined force exerted by teethand muscles and the force as a...