How to swim with sharks: a primer.

Learning How to Swim and Improving Self-Efficacy: Physical Education Needs to be Taken More Seriously

Learning How to Swim and Improving Self-Efficacy: Physical Education Needs to be Taken More Seriously M. Taslimi P. Iraannejaad, Ph.D. Z. Lebaadi, Ph.D. Physical education is not just for improving the functions and well-being of the body, as it can help with the improvement of the psychological functions as well. A physical, and enjoyable, activity such as swimming, as a p...

Unexpected Positive Buoyancy in Deep Sea Sharks, Hexanchus griseus, and a Echinorhinus cookei

We do not expect non air-breathing aquatic animals to exhibit positive buoyancy. Sharks, for example, rely on oil-filled livers instead of gas-filled swim bladders to increase their buoyancy, but are nonetheless ubiquitously regarded as either negatively or neutrally buoyant. Deep-sea sharks have particularly large, oil-filled livers, and are believed to be neutrally buoyant in their natural ha...

Scaling of swim speed in sharks: a comment on Jacoby et al. (2015).

A new acoustic tailbeat transmitter for ®shes

A new acoustic transmitter for monitoring the tailbeat frequency of free-swimming ®shes and sharks is described. The transmitter is externally mounted on the ®sh's caudal peduncle and produces an acoustic pulse with every lateral movement of the tail. Field tests on obligate-swimming juvenile scalloped hammerhead sharks (Sphyrna lewini) show these transmitters accurately telemeter tailbeat de ̄e...

Correction to 'Is the scaling of swim speed in sharks driven by metabolism?'

The movement rates of sharks are intrinsically linked to foraging ecology, predator-prey dynamics and wider ecosystem functioning in marine systems. During ram ventilation, however, shark movement rates are linked not only to ecological parameters, but also to physiology, as minimum speeds are required to provide sufficient water flow across the gills to maintain metabolism. We develop a geomet...