Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Saltwater Crocodiles Can Find Their Way Home

26.09.2007
Three crocodiles relocated from their homes in Far North Queensland have been tracked swimming between 10 and 30 kilometres per day according to a collaborative research project by The University of Queensland, Australia Zoo and Queensland Parks and Wildlife Service.

Professor Craig Franklin, from the University's School of Integrative Biology, said one relocated crocodile swam around the northern tip of Australia to reach home — covering more than 400 kilometres in 20 days.

“We often thought crocodiles tired very quickly but here we show very clearly that they are capable of moving long distances for days on end," Franklin said.

The results come from the first satellite tracking study of wild crocodiles undertaken by the collaboration and led by Dr Mark Read (QPWS), Professor Franklin and Steve Irwin and funded in part by a generous bequest from the late Charles Tanner, a herpetologist who lived most of his life in Cooktown, and a grant from the Australian Research Council.

The crocodiles were tracked using a specially-designed transmitter attached to the back of their heads that collected the data and relayed it via satellite back to the scientists.

The results highlighted the success of satellite tracking for crocodiles allowing continuous tracking without human interference.

Professor Franklin said “Satellite technology is a great way of tracking these really cryptic animals which are difficult to follow.

"The success of the study was also recognition of the skills and knowledge that Steve Irwin brought to the project."

He said Steve Irwin was a major driving force behind the study, and his intellectual and logistical support complimented the knowledge, experience and contributions made by the other team members.

"He also gave us the assistance of the croc team from Australia Zoo, who are highly skilled in the capture and care of crocodiles."

All three monitored crocodiles were moved by helicopter between 52 and 130 kilometres away but still found their way back to their capture sites. One crocodile was flown across Cape York Peninsula from the west to east coast, and then circumnavigated the peninsula to return home.

He said crocodiles probably used many factors such as its position to the sun, magnetic fields, sight, and smell to navigate.

“Crocodiles are more closely related to birds than they are any other reptile so they are possibly using navigation systems similar to birds?”

He said the data showed that estuarine crocodiles were oceanic animals which could move phenomenal distances over a prolonged period of time.

He said further satellite and acoustic tracking studies would reveal even more impressive results about crocodile behaviour in coming months and years.

Andrew Hyde | alfa
Further information:
http://www.plosone.org
http://www.plosone.org/doi/pone.0000949

More articles from Ecology, The Environment and Conservation:

nachricht Dead trees are alive with fungi
10.01.2018 | Helmholtz Centre for Environmental Research (UFZ)

nachricht Management of mountain meadows influences resilience to climate extremes
10.01.2018 | Max-Planck-Institut für Biogeochemie

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Scientists decipher key principle behind reaction of metalloenzymes

So-called pre-distorted states accelerate photochemical reactions too

What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

Im Focus: Room-temperature multiferroic thin films and their properties

Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.

Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...

Im Focus: A thermometer for the oceans

Measurement of noble gases in Antarctic ice cores

The oceans are the largest global heat reservoir. As a result of man-made global warming, the temperature in the global climate system increases; around 90% of...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

 
Latest News

White graphene makes ceramics multifunctional

16.01.2018 | Materials Sciences

Breaking bad metals with neutrons

16.01.2018 | Materials Sciences

ISFH-CalTeC is “designated test centre” for the confirmation of solar cell world records

16.01.2018 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>