Behaviour

Racoon butterflyfish
Racoon butterflyfish

Fussy butterflyfish avoid corals touched by seaweed

A new study has revealed butterflyfish are particularly fussy about their food and shelter needs, avoiding corals that have come in contact with seaweed. Conducted by the University of Delaware, the study is the first to critically evaluate how coral-seaweed interactions will impact coral associated reef fishes, a key component of coral reef resilience.

A pod of about 5 came very close inshore off the east coast of Unst, Shetland Islands, probably scratching themselves on the rocks.

Orcas massage themselves in shallow waters

They exhibited no signs of having been beached. Instead, they swam around and frolicked amongst themselves. "You can even see some of he bigger orcas swimming alongside the calves as if they're showing them what to do," said an employee of a nearby business.

Although unusual, this behaviour was normal.

Some sharks are smart cookies

Researching the intelligence of the grey bamboo shark a team of researchers at Rheinische Friedrich-Wilhelms-University in Bonn, Germany showed that sharks could be trained to recognise and remember shapes for an extended period of time.

First juvenile sharks were subjected to three different cognition experiments, one at a time, and then tested to see how long the sharks could remember their training.

Most shark bites are equivalent of dog bites, says George Burgess

ISAF 2014 Worldwide Shark Attack Summary released

Florida again led the United States in shark attacks last year, with 28 incidents and no fatalities. The vast majority of the Florida incidents were minor ones in which a shark quickly bites an arm or leg in poor visibility water, releasing it as soon as the shark realizes its prey isn't a fish.

"Most of them are better called bites than attacks," said George Burgess, curator of the International Shark Attack File. "They're the equivalent of dog bites."

Great Barrier Reef potato cod at risk from own friendliness

Potato cod in Queensland are at risk and their placid and curious nature appears to be playing a major part. The Great Barrier Reef Marine Park Authority (GBRMPA) is investigating reports that illegal fishing and fish 'framing' are responsible for declining potato cod numbers at the Cod Hole, a popular dive site off Lizard Island.

Great white sharks as scavengers

University of Miami scientists Dr Neil Hammerschlag and Austin Gallagher, in collaboration with Chris Fallows of Apex Expeditions, South Africa, observed the feeding activity around four dead whales that appeared in the False Bay region during a period of ten years. They concluded that such bountiful sources of energy-rich blubber may be a significant food source for the great sharks.



Kite surfing, Oahu, Hawaii
Kite surfing, Oahu, Hawaii

Sharks may mistake some humans for birds

A case report documenting a fatal South Pacific shark attack suggests sharks may mistake recreational water users for birds. The report, published in the Journal of Forensic and Legal Medicine, theorizes kite surfers may be at risk for such confusion. The victim, a 15-year-old kite surfing male, died after being attacked by a tiger shark in New Caledonia.

Cognition in Sharks

A difficulty in obtaining information about wild animal behaviour is that detailed observations of different individuals is necessary over long periods of time, and this is especially hard to achieve with sharks. But in the shallow lagoons of French Polynesia, such observation was possible without the encumbrance of scuba gear, and without the problem of the shark disappearing into the depths.

Deep Trust In Sharks

Jim Abernethy, owner and operator of Scuba Adventures, was the dive operator who showed all of the others that sharks are peaceful animals who want nothing to do with humans as a food source.

He spends most of his time with wild sharks during dives from his liveaboard ship, The Shear Water, at remote sites in the vicinity of the Bahamas, and is on land for only about 40 days a year.