Navigation Links
Tracking the deep sea paths of tiger sharks
Date:1/9/2014

Shark research scientist, Dr Jonathan Werry, has undertaken a four year study tracking the migratory patterns of tiger sharks (Galeocerdo cuvier) across the Southwest Pacific.

The research, in collaboration with the French government, followed the movement of 33 tiger sharks (1.54 to 3.9 m total length) across the Coral Sea between New Caledonia and the Great Barrier Reef.

The animals were tagged with satellite and acoustic transmitters and their localised movements monitored by receivers in New Caledonia, the Chesterfield and Lord Howe Islands in the Coral Sea and the east coast of Queensland, Australia.

Dr Werry said the findings, to be published in the open access journal PLOS ONE (10.1371/journal.pone.0083249), reveal that coastal marine parks provide only brief protection for these important marine predators while oceanic reefs, vital to their ecology, are overlooked.

"In this study we looked at migratory movements and fidelity to specific reefs for tiger sharks tagged in New Caledonia, the east coast of Australia (the Great Barrier Reef) and oceanic reefs in the centre of the Coral Sea," Dr Werry said.

"We found the monitored sharks utilised three dimensional activity spaces of between 503 and 2360 kmᶟ but the range of movement varied consistently with the age and sex of the animal," he said.

One 3.7 m female tiger shark was recorded to a previously unknown depth of 1136m.

"When it comes to traveling long distances adult females are the primary custodians for the 'across Coral Sea' migrations, and this is probably driven by triennial reproductive cycles," Dr Werry said.

"Pre-reproductive females and mature male tiger sharks on the other hand, were observed to demonstrate extraordinary year round residency in the oceanic Chesterfields reef, so this area appears to be a very important habitat for them."

On coastal reefs, all of the monitored tiger sharks were found to be transient.

Dr Werry said understanding the habitat-use and migration patterns of large sharks is extremely important for assessing the effectiveness of Marine Protected Areas, as well as the vulnerability of these predators to fisheries and environmental influences and management of shark-human interactions.

"Management strategies need to consider the wide-ranging movements of large (sub-adult and adult) male and female tiger sharks at the individual level, in particular when fidelity to specific coastal reefs may be consistent across groups of individuals," he said.

The importance of oceanic Coral Sea reefs should be a priority for future research."


'/>"/>

Contact: Helen Wright
helen.wright@griffith.edu.au
047-840-6565
Griffith University
Source:Eurekalert  

Related biology news :

1. Patch outperforms Holter for prolonged heart rhythm tracking
2. Tracking young salmons first moves in the ocean
3. A Turnkey Solution Measures Cognitive Workload with SMI Eye Tracking
4. From obscurity to dominance: Tracking the rapid evolutionary rise of ray-finned fish
5. Clue, a Berlin Startup Founded By a Woman, Launches An Intelligent Tracking App That Decodes a Womans Fertility Cycle
6. Memorial Sloan-Kettering researchers develop new method for tracking cell signaling
7. Its all in the genes -- including the tracking device
8. Emotient and iMotions Partner to Offer Unique Integrated Facial Expression Recognition, Bio Sensor and Eye Tracking Solution for Usability, Gaming, Market and Academic/ Scientific Research
9. Tracking sediments fate in largest-ever dam removal
10. Tracking the evolution of antibiotic resistance
11. Tracking gene flow in marine plant evolution
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Tracking the deep sea paths of tiger sharks
(Date:12/20/2016)... , Dec. 20, 2016 The ... sharing, rental and leasing is stoking significant interest ... radio frequency technology, Bluetooth low energy (BLE), biometrics ... as the next wave of wireless technologies in ... access system to advanced access systems opens the ...
(Date:12/16/2016)... , Dec. 16, 2016 The global wearable medical ... 12.14 billion by 2021 from USD 5.31 billion in 2016, at ... ... mainly driven by technological advancements in medical devices, launch of a ... preference for wireless connectivity among healthcare providers, and increasing focus on ...
(Date:12/15/2016)... Mich. , Dec. 15, 2016  There is ... car doors or starting the engine. Continental will demonstrate ... Las Vegas . Through the combination ... Start and Entry) and biometric elements, the international technology ... of vehicle personalization and authentication. "The integration ...
Breaking Biology News(10 mins):
(Date:1/11/2017)... (PRWEB) , ... January 11, 2017 , ... ... international society for optics and photonics , are commending the U.S. Congress and ... the signing Friday by the President of the American Innovation and Competitiveness Act ...
(Date:1/11/2017)... Ca (PRWEB) , ... January 11, 2017 , ... ... in pathogens are observed in clinical settings, it is becoming increasingly clear that ... An over-reliance on culture-based methods, the standard in the study of clinical resistance, ...
(Date:1/11/2017)... PA (PRWEB) , ... January 11, 2017 , ... ... entrepreneur can make all the difference when navigating the challenges young businesses face. ... tap into the extensive expertise and experience of Geoff DiMasi, Founder and Principal ...
(Date:1/11/2017)... ... January 11, 2017 , ... Advanced Polymer Monitoring Technologies (APMT) ... Bartylla will lead European initiatives for APMT’s product lines serving polymer and biopharmaceutical ... to European manufacturers and researchers. Bernhard brings significant experience in our application areas ...
Breaking Biology Technology: