animal behaviour

Samurai of the sea

9 June 2011

in 2011

SawfishWhat sawfish really do with their saw

Scientists thought that sawfish used their saw to probe the sea bottom for food.  But a Cairns researcher has found that these large (5 metres or more) and endangered fish actually use the saw to locate and dismember free-swimming fish – using a sixth sense that detects electric fields. She’s in Melbourne this week as a winner of Fresh Science. [click to continue…]

Sophie Bestley catching tuna, photo credit Adam Watkins

Sophie Bestley catching tuna, photo credit Thor Carter, CSIRO

Issued on World Oceans Day

Southern bluefin tuna can’t even have a quiet snack without CSIRO researchers knowing. They’ve developed a way of tracking when the tuna feed and also where, at what depth, and the temperature of the surrounding water.

It’s the first time anyone has been able to observe the long term feeding habits of migratory fishes directly and the information is transforming our understanding of these highly sought after ‘Porsches of the sea’.

Dr Sophie Bestley and her colleagues at CSIRO’s Wealth from Oceans National Research Flagship surgically implant miniaturised electronic “data-storage” tags into juvenile fishes off the coast of southern Australia. [click to continue…]

Dr Fiona Hogan is DNA fingerprinting Australian owls with the help of feathers and a keen public.

Her work is transforming our understanding of the night life of owls, normally notoriously secretive.

From a single feather, this Deakin University researcher can determine the species, sex, and identity of individual birds. She has already found a pair of powerful owls who have mated together for at least 10 consecutive years, and that those breeding in urban areas are typically more closely related than those which breed in the bush. [click to continue…]