The V-1302 John Mahn started out as a German fishing trawler before being converted into a patrol boat during the war. It was sunk close to the Belgian coast in 1942 by the British Royal Air Force, as part of the Channel Dash operation.
The V-1302 John Mahn started out as a German fishing trawler before being converted into a patrol boat during the war. It was sunk close to the Belgian coast in 1942 by the British Royal Air Force, as part of the Channel Dash operation.

Abandoned WW2 wrecks leak toxic chemicals in the North Sea

The V-1302 John Mahn was a fishing trawler requisitioned by the German navy during the Second World War and sunk by UK bombers in 1942. It has rested at 30 metres below sea level in the Belgian North Sea ever since.

Together with the Royal Belgian Institute of Natural Sciences, bio-engineer Josefien Van Landuyt examined samples of sediment in the area around the sunken John Mahn. In doing so, she aimed to discover whether old shipwrecks in the Belgian section of the North Sea continue to affect microbial marine life.

Tiger beach, Bahamas
Tiger beach, Bahamas. Are sharks getting bigger because of tourists or is it the bigger sharks which are interacting with tourists?

Tiger sharks that interact with tourists are larger, study shows

That feeding or attracting wildlife with food to enable better viewing opportunities by ecotourists (i.e. provisioning tourism) has the potential to alter the natural behaviour and physiology of animals has long been well established.

But how the physiological state of wildlife might be related to the nature and magnitude of these effects remains poorly understood.

Sailfish hunting sardines in the open ocean off the coast of Mexico. Image courtesy of Rodrigo Friscione
Sailfish hunting sardines in the open ocean off the coast of Mexico

How marine predators find food hot spots in open ocean

Ocean eddies are coherent, rotating features which are ubiquitous at mid-latitudes and rotate clockwise In the Northern Hemisphere.

As these anticyclonic eddies move throughout the open ocean, a recent study suggests that the predators are also moving with them, foraging on the high deep-ocean biomass which tends to accumulate within.