Washed Up This Week
We thought this article was very interesting.
It was written by Jason Tetro – Microbiology, Health & Hygiene Expert, on the Huffington Post website. This kind of issue affects every beach. This was written in the US, as they head into Summer (lucky!)
A starter snippet below…
At this time of year, almost everyone is awaiting the inevitable end to winter and the beginning of the warmer weather of spring. But many of us cannot wait for Mother Nature and instead journey to one of a plethora of pleasant places famous for their warmth, both climactic and interpersonal. Amongst the most popular destinations, including Florida, California and the Caribbean, exist some of the most desirable beaches where millions congregate to take in the joys of sun, sea, sand, and unfortunately germs.
This gallery contains 14 photos.
Dolphin Day this year was a well attended event on March 16th, 2014. See pics below…
Public consultation is now open for the future of the Pt Stanvac jetty:
There is a full report from some engineers and a document about the consultation. The deadline for comment is 28 Feb 2014.
The latest edition of DEWNR’s electronic volunteers newsletter is now online. You can view it at http://www.environment.sa.gov.
Click the link below to read a really interesting article about the size of fish getting smaller over the last 60 years. The focus is on fishing tourism in Key West area in the US.
Very interesting & disturbing read.
Aticle written by Robert Krulwich
WACRA makes urgent call on Government to fund a Community Consultation & Concept Plan for Breakout Creek Wetland from Tapleys Hill Road to Gulf St Vincent.
Please visit Western Adelaide Coastal Resident Association Facebook for more information:
You are invited to join us on Wednesday 27th November 2013 – starting at 5pm for drinks and nibbles!
The venue is the Henley Sailing Club, 1 Seaview Road, West Beach
We have two guest speakers:
Tim Kelly, Outgoing Chief Executive, Conservation Council SA – Infrastructure, Development and South Australia’s Gulfs
Sam Gaylard, Principal Water Quality Officer, EPA SA – Aquatic Ecosystem Condition Reporting
RSVP for catering please to Liz McLeay:
by phone: 8332 9324
or email: [email protected]
A very successful Open Day was held at the Tennyson Dunes on September 15th. More than 100 people attended, together with Ian Hunter, Minister for the Environment and Sustainability, Shadow Minister Michelle Lensink and Stephen Mullighan, Labour candidate for the seat of Lee.
Professor Chris Daniels and Associate Professor Victor Gostin gave talks to groups of visitors, who were given tours of the dunes by members of the Tennyson Dunes Group.
The Tennyson Dunes Group was invited to a meeting with the Minister for The Environment and Sustainability the following week, where they were informed that the Minister has decided to declare Tennyson Dunes a Conservation Reserve, provided that the wider local community were supportive. A meeting will be held to gauge public opinion and a petition will be sent to local householders.
The return of warmer weather in recent weeks has lured many Adelaideans back to the coast – ready to embrace the beach culture that we so love in summer. If you were among the walkers or swimmers, perhaps you too have been appalled by the colour of the water – a huge unappealing brown slug hugging our favourite beaches.
The cause is a cocktail of silt and other pollutants that has been pouring out of the creeks and many stormwater drains that empty onto the coast for decades. The incoming and outgoing tides mix and spread this pollution – but only a bit. Water in Gulf St Vincent does not move extensively – it basically sloshes in and out (up and down the Gulf), so the pollution radiates slowly away from its source.
In still conditions, the silt settles out, and water quality can be pretty clear. When windy weather hits, the silt is remobilised – stirred up – and the water becomes brown once again.
Depressingly, this layer of gunge is now a permanent feature of the Adelaide metropolitan coast.
But the story is more complicated…
Below is the latest update from the Department for the Environment, Water and Natural Resources on the dead dolphins and morbillivirus.
Dolphin deaths – frequently asked questions
Date posted: 30 April 2013
What is the current situation with dolphin mortalities?
Test results and observations made during the post mortem examinations point strongly to dolphin deaths having been caused by an outbreak of dolphin morbillivirus.
What is dolphin morbillivirus?
Dolphin morbillivirus is one of a family of viruses that includes distemper in dogs and measles in humans. In dolphins, it is known to cause brain and lung infections and suppress immunity, leading to secondary infections. It has been found previously in overseas dolphin populations and in Queensland and Western Australia.
How is it transmitted?
Dolphin morbillivirus is transmitted by close contact between dolphins, including between mothers and newborns. It cannot be transmitted to humans. It is unlikely that the disease would be able to survive in the environment, outside an animal, for any significant length of time.
How many dead dolphins have been found?
Thirty-one dolphins have been found along the South Australian coast since 1 March. Twenty-six of these have been found in the Gulf St Vincent bioregion, three in Spencer Gulf and two in the South East. The most recent finds were juvenile dolphins at Port Broughton on 27 April and O’Sullivans Beach on 28 April.
Where have dead dolphins been found?
Dolphins have been found at Middleton, Maslin Beach, Seacliff, Sellicks Beach, O’Sullivans Beach, Grange, Port Noarlunga, Hallett Cove, Outer Harbor, North Haven, West Beach and the Port River, at Stansbury, Port Julia and Port Broughton on Yorke Peninsula, Danger Point and Canunda in the South East and at Brownlow Beach, Kingscote and Strawbridge Point on Kangaroo Island.
What do we know about the dead dolphins?
Most of the dolphins that have been identified are Indo-Pacific bottlenose dolphins , although at least two are short-beaked common dolphins. The age of the dolphins ranges from birth to young adult.
What has been found in the dead dolphins?
Sixteen dolphins have been examined to date. Five have tested positive for dolphin morbillivirus, including two examined by the University of Adelaide’s Veterinary School. Some results of laboratory examinations are still pending Many of the animals have pneumonia associated with parasite burdens (lung worm) and disseminated fungal infections. This suggests the animals have been stressed and may have had impaired immune systems at the time of death. This is characteristic of viral diseases.
Why haven’t all the dolphins been examined?
The inter-agency team looking into the dolphin deaths has concentrated on the carcasses found in Gulf St Vincent, as this is where the highest concentration of deaths has occurred. The dolphins recovered in the South East and in Spencer Gulf will be examined at a later date.
Five of the dolphins reported dead could not be recovered and therefore could not be examined.
What about the dolphin calf from the Port River?
Mimo, the Port River dolphin calf, was collected on 16 March. His behaviour appeared to be abnormal from birth, so his death may well have been unrelated to those of the others. The pathology results from his post mortem examination have not yet been received.
If you think the deaths are caused by morbillivirus, why have so few dolphins tested positive?
Not all of the dead dolphins were able to be tested for viruses because the carcasses were too decomposed. The others do show signs that are consistent with the secondary infections common in dolphins suffering from morbillivirus.
Are the dolphin deaths linked to the fish deaths?
The recent fish deaths have been linked to an algal bloom. We do not fully understand the predisposing causes of morbillivirus infection in dolphins, but the outbreak may be linked to the same warmer-than-usual water temperatures that caused the bloom.
Are dolphins dying because of the desalination plant?
Nothing surrounding the deaths of the dolphins points to any link to the desalination plant. Salinity levels in the gulf are not at a level that would be considered dangerous. Also, dead dolphins have been found well away from the desalination plant, where salinity levels are absolutely normal.
What tests are being carried out and where have samples been sent?
Most of the dolphins that have been recovered have been examined at the South Australian Museum by a collaborative group of pathologists, veterinarians and biologists. The dolphins examined at the museum are photographed and measured, then undergo a full post-mortem. Many samples are collected, including liver, kidney, brain, muscle, heart, blubber, stomach contents and urine. The samples collected for pathology will be studied immediately using a variety of tests such as histology, bacteriology and toxicology.
Other samples will be available for future studies if the need arises. In addition, all the bodies will be macerated and the skeletons examined in detail at a later date.
PIRSA is supporting the South Australian Museum and DEWNR with the dolphin mortalities, with the Chief Veterinary Officer assisting with port mortems and pathology diagnostics.
The University of Adelaide has also examined two dolphins. Tissue samples from these and from the South Australian Museum cases have been forwarded to the Australian Animal Health Laboratory at Geelong for virus studies.
Why are the results taking so long?
Most of these tests are undertaken in Australia but the toxicity tests are to be undertaken in New Zealand. Therefore it takes a significant amount of time to get full sets of results back.
What results have been received?
Laboratory testing has identified dolphin morbillivirus in tissues from five animals, and changes consistent with a virus infection were also seen in some tissues.
Tests for algal toxins in the dolphins were negative. Microscopic examination of tissues has been completed on some dolphins and the findings indicated that the animals had pneumonia. Some also had inflammation of the brain (encephalitis). Fungi were identified in some of the affected tissues.
When will more results be available?
Post mortems are still being undertaken, so the results will come in gradually over the next three or four weeks.
Surely this isn’t a normal situation?
The numbers of dead dolphins we have seen in the Gulf St Vincent bioregion is an unusual occurrence, which is why comprehensive testing is required to determine what is actually happening. This is the first time dolphin morbillivirus has been seen in South Australia.
Is this mortality event going to impact on dolphin populations?
At this stage it does not seem that the number of dead dolphins will impact the population of bottlenose dolphins living in the bioregion.
There is no precise number of how many dolphins live in the Gulf St Vincent region but it may be as many as a few thousand. Natural mortality of dolphins occurs regularly. However, the current observed dolphin mortalities are unusual. The Indo-Pacific bottlenose dolphin is protected by law but it is not a threatened species.