HOME >> BIOLOGY >> NEWS
Concerns For Australian Sea Lion

Evidence is mounting that Australia's native sea lion population has levelled off and may be declining, prompting a leading CSIRO scientist to call for more intensive research into the species.

The call, by Dr. Peter Shaughnessy, principal research scientist with the Division of Wildlife and Ecology, follows a joint study between CSIRO and National Parks and Wildlife South Australia.

Found only in Australia, the Australian sea lion has its principal breeding colonies at Kangaroo Island and Dangerous Reef, near Port Lincoln, in South Australia. Smaller colonies exist on the west coast of SA and in Western Australia.

"Data collected suggests to us that too many pups are dying and we don't really know why," says Shaughnessy. "For example in 1996 at two colonies we found mortality rates of 30 per cent and 50 per cent respectively."

The following year mortality decreased to only four per cent among Dangerous Reef sea lions but the worry is that we have no idea what's causing these dramatic fluctuations in pup mortality, says Dr Shaughnessy.

Possible causes of death include parasites, such as hookworm, environmental perturbation causing food shortage for lactating female sea lions, high rates of aggression by adult males, direct human harassment or by interacting with fishing gear.

Another possibility, says Dr Shaughnessy, is that sea lions may be facing stronger competition for food from their cousin, the New Zealand fur seal, whose numbers are increasing on Kangaroo Island at an annual rate of around 10%.

"The Australian sea lion is an endemic species which we need to take care of. It's a tourist icon, up there with the koala, which attracts tens of thousands of visitors to the sea lions' colonies every year. If we don't find out why their numbers are not increasing, we may face more serious problems later on," he says.

'"/>

Contact: Mr David Salt
david.salt@dwe.csiro.au
61-2-6242-1645
CSIRO Australia
18-Mar-1998


Page: 1 2 3

Related biology news :

1. Concerns remain about UVB damage to amphibians
2. Top Experts To Address Top Food Safety Concerns At IFT Meeting
3. Blacks Environmental Concerns Equal/Exceed Whites
4. Reclaimed Waste Water Can Augment Municipal Drinking-Water Supplies But Concerns Must Be Addressed
5. Twin Study May Ease Parents Concerns About Late Talkers, Underscores Impact Of Environment On Language Development
6. Rare, tiny find in West Australian waters
7. Australian overturns 15 years of nano-science doctrine
8. World-first Australian truffle find
9. Australian researchers locate heart attack genes
10. Australian frog is first to make its own chemical weapons
11. New grain variety opens up possibilities for Australian farmers

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:11/13/2018)... ... 13, 2018 , ... Pharmafusion LLC announced today that company ... the upcoming CBI Gross-to-Net (GTN) Summit in Philadelphia on Thursday, November 15. In ... conference attendees will have the opportunity to “test drive” the company’s Pharmafusion360° platform ...
(Date:11/13/2018)... ... November 13, 2018 , ... ... instrumentation with capability to resolve complex sample matrix and to allow identification ... chromatograph (HRAM LC/MS) have been used extensively for structural elucidation of unknown ...
(Date:11/13/2018)... , ... November 13, 2018 , ... ... light systems for controlled-environment cultivation applications. VYPR 2 is well suited for sole-source ... cannabis, and ornamental growing markets. , “As an all-purpose light which can ...
Breaking Biology News(10 mins):
(Date:11/13/2018)... ... November 13, 2018 , ... Renowned Honolulu veterinarian, Dr. Patrick Leadbeater, has ... Kauai. Dr. Leadbeater, of Kahala Pet Hospital on Oahu, is a ... began traveling to the island of Kauai on an almost weekly basis to perform ...
(Date:11/13/2018)... ... November 12, 2018 , ... AseptiScope(TM), Inc. ... two large U.S. studies, published last week, confirm pose a significant health risk. ... Control (AJIC) conclude that stethoscopes are often improperly or rarely disinfected. In the ...
(Date:11/13/2018)... ... 12, 2018 , ... Dr. Dan Myers, a well-respected regional ... welcomes new patients for MTM® Clear Aligners. Offering a variety of orthodontics solutions, ... the Sandy Springs and Alpharetta areas. Constantly on the forefront of innovative dental ...
(Date:11/13/2018)... BOSTON (PRWEB) , ... November 13, 2018 , ... ... an analysis of the spine technology market last week that asserts it is ... global patient population. , Humad’s analysis describes market consolidation, pricing pressure ...
Breaking Biology Technology:
Cached News: