Nov 092013
 

Prawn trawlers accused of large fish killsOriginal story by Carl Curtain, ABC Rural

Recreational fishermen in the Northern Territory are venting concern over recent fish kills, which they say are being caused by prawn trawlers.
Recreational fishermen in the Northern Territory are venting concern over recent fish kills. Fish apparently found floating in the Gulf of Carpentaria.

Recreational fishermen in the Northern Territory are venting concern over recent fish kills. Fish apparently found floating in the Gulf of Carpentaria.

The Nhulunbuy Fishing Club, on the north east Arnhem Land coast, has received photos of small trevally and mackerel which were apparently found on floating in the ocean.

The NT Game Fishing Association executive officer, Peter Cox, told ABC Local Radio the dead fish are the by-catch from trawlers operating nearby.

"Our concern is how close they're working to some of our reefs and seagrass patches, especially with dugong and turtles.

"It's the by-catch. We have photos of just acres of dead fish floating on the water after the trawlers have been through," he said.

There are 52 prawn trawlers operating in the Northern Prawn Fishery, with the season running from August 1 through until November 30.

Austral Fisheries general manager, Andrew Prendergast, says he's surprised to hear about large fish kills.

"I'm not so much [surprised] about what they're claiming they saw, but the fact that they believe we're trawling on top of reefs, which we simply can't do.

"We've got closures all around the fishery to protect our seagrass beds because that's where our tiger prawns breed," he said.

"It would be commercial suicide for us to go near seagrass beds."

He says prawn trawlers use mechanical devices to prevent the netting of large fish and turtles, which also reduce the by-catch.

"There is a 100 per cent compliance with the towing of these devices in the nets, you simply cannot go to work without them.

"We tend to get a very good relationship between by-catch and the prawn during the night part of our trawl," he said.

"All fishermen do their best to avoid [a fish kill], but if they've trawled through until eight o'clock in the morning, they may have encountered a small patch of fish which, as they've discarded it from the catch, has floated on the surface."

Nov 082013
 

ABC NewsOriginal story by Emilie Gramenz, ABC News

A three-metre crocodile found in the Mary River near Maryborough, is settling into its new home in central Queensland.

Staff at Koorana Crocodile Farm, near Rockhampton, spent several hours this morning confirming its gender and releasing it from a cage into a pen.

It is the first wild croc the farm's taken in two decades.

Adam Lever from Koorana says releasing a wild animal is always tough.

"Of course you've got 66 teeth and a hell of a lot of power coming down in those jaws," he said.

"Pretty much what you've got to do is keep safety in the front of your head.

"We have a cage that we can lift the crocodile over the top of the fence, we take one of the slings off the back, and we slowly release her out of the back of the cage."

Nov 072013
 

The ConversationOriginal story by Susan Lawler, La Trobe University at The Conversation

Burrowing crayfish are a particular challenge to survey and to conserve because they live underground, and their ability to disperse is extremely limited. Sometimes this means that impacts on their habitat go unnoticed and once affected, their populations are unlikely to recover quickly.
What’s threatening the Mallacoota burrowing crayfish? Point the finger at grazing, forestry, and fishing. Photo: Jason Coughran

What’s threatening the Mallacoota burrowing crayfish? Point the finger at grazing, forestry, and fishing. Photo: Jason Coughran

This series has discussed these challenges before when discussing burrowing crayfish in Western Australia and in Tasmania. The two Victorian species of burrowing crayfish that are critically endangered are the Warragul Burrowing Crayfish (Engaeus sternalis) and the Mallacoota Burrowing Crayfish (Engaeus mallacoota).

Both of these species are found in Gippsland, but one of them is a dark, glossy creature that prefers sandy soil in a remote bay near Mallacoota, while the other is a ghostly white or pale blue fuzzy specimen found in clay riverbanks in farmland near Warragul.

The site best known for the Warragul Burrowing Crayfish has been identified as Australia’s most diverse crayfish habitat because it supports four different burrowing crayfish species and at least two (possibly three) different species of spiny crayfish (Morey and Hollis 1997). I have visited this site on Labertouche Creek and it is one of the most unassuming biodiversity hotspots imaginable: a paddock that looks like any other in this part of Gippsland except for the fence that keeps the cows away from part of the river bank.

Part of the charm of burrowing crayfish is their cryptic habit — because they spend most of their time underground, most people are unaware that they are even there. Usually, Engaeus crayfish leave muddy chimneys at the entrance to their burrows which allow the careful observer to register their presence. Unfortunately, the Warragul Burrowing Crayfish often build tunnels that do not connect to the surface. This means that finding them may mean damaging their habitat by digging up a section of the river bank.

A ghost of a crayfish: the Warragul burrowing crayfish. Photo: Beverly Van Pragh

A ghost of a crayfish: the Warragul burrowing crayfish. Photo: Beverly Van Pragh

Status

The Mallacoota Burrowing Crayfish (Engaeus mallacoota) is critically endangered and is officially known from a single location in the Croajingolong National Park. However, in the last two years surveys funded by the Bushfire Royal commission have expanded the range of the species slightly. Tarmo Raadik of Arthur Rylah Institute said the number of burrows indicate that the crayfish may be locally abundant, but their limited distribution still creates a risk for the long term.

Unfortunately, the sandy shifting soils they prefer and the deep burrows they dig make these animals very difficult to collect. Counting burrows is not sufficient evidence as other (non-endangered) burrowing species overlap with their distribution, so we need better ways of collecting these little diggers.

The Warragul Burrowing Crayfish (Engaeus sternalis) is also critically endangered and until recently was known from one location on Labertouche Creek. However, the Baw Baw Shire Council did a biodiversity assessment two years ago which expanded the range of the species. Warragul Burrowing Crays have been found in the townships of Warragul and Drouin by biologist Beverly Van Praagh. She also discovered that their burrows do come to the surface and have a small chimney, but only at certain times of year.

In general, for both species, we know virtually nothing about their ecology, population dynamics or habitat requirements.

Threats

Burrowing crayfish are particularly vulnerable to local environmental disturbance. Fire, drought or large sediment pulses can drastically affect populations, especially when their distribution is as limited as in these two cases.

Even though the Mallacoota Burrowing Crayfish is found in a national park, its range includes grazing land which means their burrows can be trampled by cattle. Timber harvesting in the adjacent state forest can impact vegetation and water quality in the streams that support these crayfish. Recreational fishing is still allowed in the national park, which can pose a risk if fishers mistake these crayfish as “yabbies” and use them as bait.

The Warragul Burrowing Crayfish has a different set of issues as its environment has been subject to 100 years of grazing which has caused streamside erosion and a loss of native vegetation. Gold mining may have had a large impact, and the introduction of trout creates the threat of predation if they venture into the creeks. Given its proximity to town, it is likely that its habitat has been also destroyed by the development of infrastructure such as roads.

Strategy

There are action plans in place for both the Mallacoota Burrowing Crayfish and the Warragul Burrowing Crayfish. Both plans call for more research and surveys due to the lack of information about these species.

One of the challenges is how to conduct surveys when traditional methods (digging up burrows) are destructive and time consuming. Pitfall traps have been used to collect Warragul Burrowing Crayfish in the past. More recently, the Arthur Rylah Institute had a 10% capture rate of Mallacoota Burrowing Crayfish using specially designed burrow tube traps. In future it may be possible to use eDNA (environmental DNA) to determine what species is in a burrow just by sampling the mud at the entrance.

Education is essential for the conservation of burrowing crayfish, because we can’t take appropriate actions unless we know that these gorgeous little creatures are digging in the soil under our feet.

The community education program for the Warragul Burrowing Crayfish began in 1995 with a brochure and some fencing to protect their habitat. It has recently been expanded significantly with information signs near a giant burrowing crayfish installed on the Two Towns Trail between Warragul and Drouin. According to Greg Hollis of the Baw Baw Shire Council, further plans are underway for protecting crayfish habitat.

Some towns have giant bananas, others have giant burrowing crayfish. Photo: Greg Hollis

Some towns have giant bananas, others have giant burrowing crayfish. Photo: Greg Hollis

Conclusion

We have already come a long way in recognising and implementing conservation plans for burrowing crayfish. When I dug up my first terrestrial crayfish 20 years ago very few people knew about these engaging crustaceans. My experience in sharing information about burrowing crayfish is always positive: everyone who is lucky enough to meet one of these little guys is charmed by them.

With careful management of our rivers and wetlands we should be able to maintain these populations into the future. Their cryptic habits have a benefit – they can usually avoid predation and survive all but the most severe floods and fires without significant intervention. But we still need to manage their habitats, protect native vegetation and keep the creeks and rivers clean.

And if you get a chance, visit the Two Towns Walk in Warragul and Drouin and keep your eye out for small holes in the mud, knowing that they may lead to the elaborately branched underground world of the burrowing crayfish, a world about which we know virtually nothing.

The Conversation is running a series on Australian endangered species. See it here.

Susan Lawler has received funding from the Australian Research Council.

The Conversation

This article was originally published at The Conversation.
Read the original article.

Nov 072013
 

ABC NewsOriginal story at ABC News

A new surface drain will catch irrigation water in Berri and deliver it to a nearby floodplain, to protect an endangered fish species.
The endangered Murray Hardyhead, Craterocephalus fluviatilis.Source: ACF

The endangered Murray Hardyhead, Craterocephalus fluviatilis. Source: ACF

The Katarapko Floodplain is home to one of seven remaining populations of Murray hardyhead in the Murray-Darling Basin system.

A 2.5 kilometre long drain has been constructed to take irrigation drainage from Berri to the floodplain.

Wetlands ecologist Lara Suitor says the mixture of irrigation water will create ideal conditions for the fish, which thrive in saline conditions.

"Obviously the irrigation water entering the site is quite saline and the drain is also intercepting a fair amount of groundwater as well, so the idea is to connect the surface drain up with this particular creek to create an ideal salinity range for this particular species," she said.

She says the additional water will improve the health of the fish.

"Currently, the population within the Berri saline disposal basin is the largest and healthiest population of this fish species that currently exists in the Murray-Darling Basin and what we're doing is creating additional habitat for this fish species for drought refuge," she said.

Nov 072013
 

ABC NewsOriginal story by By Frances Adcock, ABC News

Rangers have captured one of the two crocodiles lurking in the Mary River near Maryborough in south-east Queensland.
Crocodile seen near Maryborough, another 3.5 metre crocodile sitting on the banks of the Mary River in May 2012. Photo: Brad Marsellos, ABC Wide Bay

Crocodile seen near Maryborough, another 3.5 metre crocodile sitting on the banks of the Mary River in May 2012. Photo: Brad Marsellos, ABC Wide Bay

The 3.1 metre female saltwater crocodile was harpooned by rangers on a boat patrol of the Mary River in Maryborough overnight.

This croc was first spotted by fishermen in July, but the Queensland Parks and Wildlife Service has been patrolling the river since May 2012, when the first 3.5 metre crocodile was sighted.

Environment Minister Andrew Powell says the female croc had shown no interest in the tasty food traps on offer.

"This croc has been very wary of our rangers on the river for many months now," he said.

Mr Powell says it was quite an operation to catch the reptile.

"It surfaced about a metre away from one of our boats at about 2:00am (AEST) and [rangers] were able to fire a non-lethal harpoon and then wrap it up in a piece of rope and actually swim it in to a boat ramp," he said.

Saltwater crocodiles

  • One of two species in Australia - saltwater and freshwater - but both can live in either fresh or salt water
  • 'Croc country' typically reaches as far south as the Boyne River near Gladstone, 500km north of Brisbane
  • Crocs mostly live in tidal reaches of rivers but also move in lagoons, rivers, and swamps up to hundreds of kilometres inland
  • An average male may be 3-4m long and weigh 200-300kg. Females rarely reach over 3.5m and weigh up to 150kg.
  • More aggressive in breeding season, which runs from September to April

Sources: Queensland Department of Environment and Resource Management, Queensland Environmental Protection Agency.

"Between my rangers and some very helpful police officers, they were able to remove it from the water and have it ready to transport to a croc farm in Rockhampton in central Queensland."

However, Mr Powell says despite the capture, residents should remain vigilant with the larger saltie still lurking.

"People do need to be croc-wise around the Mary River," he said.

"The one remaining is even larger again and people need to be very careful around boat ramps and fishing."

Rangers say they will continue boat patrols until it is caught.

Crocodile experts say the pair may have been breeding.

Nov 072013
 

ABC EnvironmentOriginal story by Sarah Lucas at ABC Environment

Yesterday we heard the news that a new dolphin species has been found in Australia. But already we know that much needs to be done to protect this as-yet-unnamed species.
Unnamed species of humpback dolphin frolics in Australian waters.

Unnamed species of humpback dolphin frolics in Australian waters.

YESTERDAY, it was announced a new species of dolphin was found swimming off the Australian coast. By examining the skulls and DNA of hundreds of related dolphins, researchers concluded that there are at least four individual dolphin species.

Previously, all Indo-Pacific humpback dolphins were classified as belonging to a single, globally-spread species, Sousa chinensis. However, biologists are now convinced that the Aussie cousin of Sousa chinensis is a whole new species. This means Australia's humpbacks dolphins are, like kangaroos and koalas, unique.

It also means that current indications of population size, which group the species as one, exaggerate real population numbers. The International Union for the Conservation of Nature (IUCN), for instance, states that there are probably more than 10,000 Indo-Pacific humpback dolphins globally. There has not been sufficient research to produce a reliable estimate, but the population of Australian humpbacks is presumably much smaller than this, perhaps in the low thousands or below.

According to Tom Jefferson, a conservation biologist based in San Diego, this has major consequences for the conservation status and management of these dolphins. "Right now, the IUCN doesn't list it in one of the highest threat categories," he says. "However, if the Australian humpback is indeed split out as a separate species, it's very likely it would receive a higher risk category."

Very little is known specifically about the risks these dolphins face, but what we do know is cause for concern. Unlike most dolphins, humpback dolphins live close to the shore where they come in particularly frequent contact with human activity. What's more, the regions they happen to inhabit, particularly Australia's north-western coastline, are undergoing extensive development associated with the rapid expansion of the oil, gas and mining industries.

Coastal development poses a whole series of issues for local marine mammals, not least the contamination of their habitats with pollutants, sewerage and even noise (the sonic emissions from heavy shipping traffic can disrupt dolphins' feeding and breeding).

But the greatest threat of all for inshore dolphins, according to Guido Parra, Leader of the Cetacean Ecology, Behaviour and Evolution Lab at Flinders University, is intensive fishing. "The main impact related to fishing is the by-catch of these dolphins in fish or gill nets," he says. Gill nets entangle and drown thousands of animals, from sea snakes to whales, each year. As not all threatened species by-catch is reported, it's difficult to know how many dolphins fall victim to fishing nets. But, according to Simon Allen of the Murdoch University Cetacean Research Unit, because humpback dolphins live in small, discrete groups which don't interbreed, the loss of even an individual or two can put a local population at risk of extirpation.

Beyond conservational concerns, fishing nets also inflict enormous suffering on marine animals. We don't think of the cruelty of fishing gear, but dolphins drown having flesh ripped off them by the sharp nets. There are nets that flense whales alive. They rip off chunks of them over months, and they swim around with wounds until they die. Yet, there are no penalties for entangling marine animals as long as the incident is reported, and therefore little incentive for fishing operations to reduce by-catch.

In 1996, the "Australian Action Plan for Cetaceans" recommended a comprehensive conservation program be initiated for humpback dolphins, including the introduction of appropriate environmental management legislation. Nearly two decades on, there is still no national approach or strategy for the conservation of inshore dolphins.

Scientists specialised in inshore dolphins agree that the first and most urgent step is research to find out more about these relatively unknown species. A better understanding is needed of exactly where they live, and what sort of threats they are facing across their distribution. In the Action Plan, it was estimated that the necessary aerial surveys and habitat studies could be completed for $380,000.

Knowledge of where the dolphins are distributed would open up a range of management options. A priority, says Darren Kindleysides, Director of the Australian Marine Conservation Society, is the establishment of marine reserves covering endangered dolphin habitats. "The science shows that marine reserves work, and we need to invest in them in order to turn around decline in these species," he says. A network of commonwealth marine reserves, announced by the previous government in 2012, is due to come into effect in July 2014. However, the Coalition has promised to suspend and review the marine park legislation.

Short of marine parks, programs could be introduced to at least reduce the impact of fishing nets in critical habitat areas. In Queensland, for instance, a scheme exists to buy back commercial net fishing licences, and similar schemes could be introduced in target areas where humpback dolphins are concentrated. Greater efforts could also be made to ensure accurate reporting of by-catch of endangered dolphins (in a major step backward, the Queensland government has abolished its Fisheries Observer Program, which provided an independent source of data on fisheries by-catch).

There is one more step — a no-brainer — which could be taken immediately and would benefit humpback dolphins and many other species: the removal of shark protection nets at beaches in Queensland and NSW. The rationale behind the nets is to deliberately drown sharks (a slow and painful experience for endangered sharks), but, like fishing nets, they also take a heavy toll on unintended species. Ninety dolphins, including five humpback dolphins, were caught and killed by shark protection nets from 2004 to 2009.

Removing the nets would be good not just for marine animals, but also for beachgoers. "Shark control nets don't create a real barrier — it's a false sense of security," says Kindleysides. "There's quite a damning statistic which says that 40 per cent of sharks caught in the nets are caught on the beach side, which means that sharks can swim around them and under them". A more effective option would be to reallocate resources spent maintaining shark nets to surf lifesaving monitoring with aerial flyovers, which can also spot much higher probability dangers for swimmers such as riptides.

Politicians appear to be wary of addressing the shark net issue, but we should seriously consider this and other conservation measures for inshore dolphins. First and foremost, we should make sure there is adequate investment in a coordinated research program to better understand the mysterious humpback dolphin. Given the threats they face are from human activities, we owe it to them to at least find out what sort of damage we're doing. If we don't, we may find that Australia's pink dolphins are seriously endangered before they are even officially recognised as a species.

Sarah Lucas is CEO of Australia for Dolphins.

Nov 072013
 

The ConversationBy Euan Ritchie, Deakin University at The Conversation

Much of my time as an ecology lecturer has been spent teaching students about the wonders of this planet’s biodiversity, but also regrettably, how much of this biodiversity is under severe threat. Hundreds, if not thousands, of species become extinct each year.
You never know what you’ll catch on camera in PNG. Photo: Tenkile Conservation Alliance

You never know what you’ll catch on camera in PNG. Photo: Tenkile Conservation Alliance

With such a disastrous outlook for the species with which we share Earth, it’s easy to get disheartened about where we’re headed. More personally, I often question whether my own fields of science (ecology and conservation biology) are really enough to help stem the extinction tide.

But this week I’m embarking on a journey to Papua New Guinea’s remote Torricelli Mountains. It’s part of a crowd-funded project, Discovering Papua New Guinea’s Mountain Mammals that is a partnership between myself at Deakin University and Jim and Jean Thomas of the Tenkile Conservation Alliance. Together we will count and identify mammals as part of conservation efforts in the region, including some very special species of tree kangaroo.

Just how many Tenkile tree kangaroos are left and where are they found? Our cameras will provide these answers. Photo: Tenkile Conservation Alliance

Just how many Tenkile tree kangaroos are left and where are they found? Our cameras will provide these answers. Photo: Tenkile Conservation Alliance

Who or what is a Tenkile?

The Tenkile (pronounced ten-kee-lay) is one of 14 tree kangaroo species found in the tropical rainforests of New Guinea and Australia.

In 2001 there were only 100 Tenkile left in the Torricelli Mountains of PNG. To put that in perspective, there are thought to be around 1600 Giant Pandas in the world today. That made the Tenkile one of the world’s most endangered animals. The reason they’re still with us today is largely thanks to the work of the Tenkile Conservation Alliance.

People are a big focus and reason for the TCA’s success. Photo: Tenkile Conservation Alliance

People are a big focus and reason for the TCA’s success. Photo: Tenkile Conservation Alliance

 

The conservation alliance sets itself apart from many others by focusing on causes rather than symptoms of extinction. The Tenkile had become endangered due to over-hunting, so rather than ignore the needs of local people, the alliance places a strong emphasis on these communities who share the region with the Tenkile.

The reason for the bounce back of Tenkiles is a switch from hunting to more sustainable and reliable sources of protein, including farmed rabbits and chickens. Along with improved education about the local community’s wildlife, and health and living conditions, there has been a real reversal in the once dire trajectory of the region’s wildlife. Thanks to these actions there are now more than double the number of Tenkile there were in 2001.


The Tenkile Conservation Alliance has a community-based approach to conservation

Professor Tim Flannery, himself no stranger to the wilds of PNG, wrote:

A decade on, the Tenkile Conservation Alliance is the most successful conservation organisation in Melanesia … and no other organisation I know of in a developing country has had anything like this degree of success.

What do we hope to achieve in PNG this time?

Our upcoming trip will take us to the northwestern Torricelli Mountains near the Waliapilik area in Sanduan Province. Over two weeks we’ll place 35 remote, motion-sensing cameras out along lines and an elevation gradient ranging from 500 to 1500 m above sea level. These will help us determine a number of things, including:

  • Are tree kangaroo species (including the Weimang, Tenkile and Yongi) found within the region?
  • If present, how many individuals of each species are there?
  • What habitats are most important for each species?
  • Are species only found at specific elevations and in particular climates, and hence how susceptible could species be to the impacts of global climate change?

To say this trip is full of anticipation is putting it lightly. Along with the critical information we aim to collect on tree kangaroos, we also suspect new species are to be found in the area, including miniature wallabies and echidnas.

When we retrieve our cameras in a few months time it’s going to be exciting to see what we find, and it’s almost guaranteed that there will be many firsts for science. Because camera traps detect and record anything that moves past them, we’ll collect valuable data on a large range of species.

What secrets are waiting to be discovered in these remote forests? Photo: Tenkile Conservation Alliance

What secrets are waiting to be discovered in these remote forests? Photo: Tenkile Conservation Alliance

Thanks to all who have helped get us this far. This is just the beginning, and if you’d like to contribute or stay in touch please contact me here.

Euan Ritchie receives funding from Pozible www.pozible.com/tenkileThe Conversation

This article was originally published at The Conversation.
Read the original article.

Nov 052013
 

The ConversationBy Mathew Crowther, University of Sydney at The Conversation

A new study by Rebecca Pian, Mike Archer and Sue Hand, published today in the Journal of Vertebrate Paleontology, describes the tooth of a new, giant species of extinct platypus.
At more than a metre long, this platypus doubles the size of modern platypus. Reconstruction/Illustration by Peter Schouten

At more than a metre long, this platypus doubles the size of modern platypus. Reconstruction/Illustration by Peter Schouten

The fossil history of the platypus shows the modern platypus is just the tip of the iceberg of a diverse radiation.

A toothier platypus

In 1975, American palaeontologists Michael Woodbourne and Richard Tedford published a description of ancient platypus teeth from the Etadunna and Namba formations in central Australia. The specimens were dated from the Oligocene, 24 to 26 million years ago.

They described these teeth as belonging to an ancient platypus they named Obdurodon insignis. The name Obdurodon comes from the Greek for “lasting (obdurate) tooth”. It was coined to distinguish extinct toothed platypuses from the essentially toothless modern species - modern adult platypus do not have teeth, but juveniles do.

Later on, a spectacular skull of another ancient platypus was recovered from the limestone deposits of the Riversleigh World Heritage Area of northwestern Queensland. The skull, named Obdurodon dicksoni, was near complete with teeth. It was estimated to be from the mid-Miocene, around 15 million years ago.

A surprising discovery was published in 1992, where the teeth of a South American platypus, Monotrematum sudamericanum, were found in Patagonia, Argentina. They were dated at 61 million years old, demonstrating the platypus had a much wider range in times past.

Not quite THAT big. Photo: Everett Kennedy Brown

Not quite THAT big. Photo: Everett Kennedy Brown

A big platypus with a broad diet

What is spectacular about the new discovery, named Obdurodon tharalkooschild, is its size. It is the largest species of platypus ever described; the authors estimate it was almost a metre long. Compare this to the modern platypus, where a large male from Tasmania is lucky to reach 60cm. This species was double the size of the typical mainland platypus.

Like the skull of Obdurodon dicksoni, this skull was recovered from the limestone formations of the Riversleigh World Heritage Site, where Archer and his colleagues have been working for over 20 years. The well-preserved fossils from this area have already rewritten the book on marsupial evolution, and now they are doing the same for Australia’s egg-laying mammals (monotremes). The Two Tree site, where the tooth was found, is not actually dated, but the authors estimate the age at between 15 and 5 million years old.

So what information can we gather about the life of this giant platypus? Basing the whole picture on one tooth makes it difficult, but the bumps and ridges indicate that it may have fed on wide range of aquatic organisms. It would have eaten crayfish and other freshwater crustaceans, like the modern platypus does, but its large size and robust dentition would have let it feed also on small vertebrates including the lungfish, frogs, and small turtles that are preserved with it.

Named for a legend

The species name, tharalkooschild, is in reference to an Indigenous Australian creation story about the origin of the platypus.

During the Dreaming, Tharalkoo was a head-strong duck inclined to disobey her parents. Her parents warned her not to swim downriver because Bigoon the Water-rat would have his wicked way with her. Scoffing, she disobeyed her parents and was raped by Bigoon.

By the time Tharalkoo escaped and returned to her family, the other girl ducks were laying eggs, so she did the same. But instead of a fluffy little duckling emerging from her egg, her child was an amazing chimera that had the bill, webbed hind feet, and egg-laying habit of a duck, along with the fur and front feet of a rat. It was the first platypus.

Changing environment, changing platypus

The discovery of this fossil further adds to our understanding of the evolution of Australia’s fauna, and the environmental changes to the continent.

It further enriches Australia’s heritage, but it may also have a valuable message for the future of Australia’s fauna. The platypus had a higher diversity of form and much wider range in times past.

Its reduction to one species living on the east coast of Australia is certainly due to climate and resulting environmental changes. As the Australian continent moved north over millions of years, the previously wet interior of the continent dried up. This meant that the platypus became restricted to the wet east coast of the continent.

With a rapidly changing climate, we may need to have further concern for one of the world’s most unique animals. Most climate predications have the east coast of Australia becoming hotter and drier, with more extreme weather events. With human impact on waterways increasing on the east coast, the last member of the ancient, and once more diverse, platypus family could be in danger in the future.

Mathew Crowther receives funding from Australia Pacific Research Foundation

The Conversation

This article was originally published at The Conversation.
Read the original article.

Oct 312013
 

Green group warns Mary River turtle nests destroyed amid breeding seasonOriginal story by Jon Coghill, ABC News

A conservation group says humans and livestock have destroyed the shallow nests of the vulnerable Mary River turtle on Queensland's Sunshine Coast hinterland.

Glenda Pickersgill from the Save Mary River Coordinating Group says the reptile is in the middle of its laying season, which lasts from October to December.

Mary River Turtle with handler. Photo: Peter Gooch, ABC

Mary River Turtle with handler. Photo: Peter Gooch, ABC

She says some turtle nests have been lost after being dug up or driven over.

"There's a few areas where we've seen disturbance of sandbanks and I think that's disappointing," she said.

"The eggs are under the surface by only 15, 16cms, so any trampling, whether it be by humans or by driving over or even by stock, can damage the clutch of eggs that's underneath."

She says the Mary River turtle only lays its eggs in sandy and shady areas and it is important their nests are not disturbed.

"October through to December is the main laying period," she said.

"It'll take about 50 to 55 days to hatch.

"There's a few months there where they're really vulnerable. Unless we've got baby Mary River turtles coming through to replace the elderly, that's where the whole endangered aspect can be helped."

Oct 272013
 

Original story by Stephen Garnett at The Australian

A hooded plover chick on a NSW South Coast beach.

A hooded plover chick on a NSW South Coast beach.

ON July 9, 1904, Alan Owston shot a female rainbow bee-eater that had migrated north from Australia to the island of Okinawa south of Japan.

This bedraggled bird, now in the American Museum of Natural History, remains the only record of a bee-eater from Japan. Despite this, 70 years after the bird died, the bee-eater was appended to the Japan-Australia Migratory Bird Agreement.

JAMBA, as it is known, is one four international agreements that make migrants matters of national environmental significance under Australia's foremost environmental legislation, the Environment Protection and Biodiversity Conservation Act. Because bee-eaters appear on an EPBC Act list of migrants, every environmental impact assessment has to consider whether a proposed development will have a detrimental effect on the species.

None ever have, because bee-eaters are abundant and widespread. However, for the very reason that they are so common, almost every environmental consultant has a copy-and-paste paragraph justifying why bee-eaters should again be ignored - though they have sometimes had to argue hard to convince those setting conditions.

Forty years ago the author of the JAMBA schedules was probably pleased to get any bird recognised under international law. The same list includes several extinct species and one, the Roper River scrub-robin, which we now think never existed.

Today, however, such inclusions are seen as at best a waste of time, at worst a major unnecessary impediment. So too are the many marine species than never touch the sea - including some that never cross water at all if they can help it. Birds like Trumpet Manucodes that never fly across water, even to islands just offshore, are still listed as marine species.

Such errors in listing are more than petty mistakes. They can have major ramifications - both for the species they miss and the species wrongly included.

To take the first group - the ones that ought to be listed. In 2010 I led a review of the status of Australia's birds using mostly the same criteria used to list species under the EPBC Act. The experts around the country who contributed to that year-long review concluded that 125 species and subspecies of Australian bird are threatened. The EPBC list includes just 91 of those.

Similarly 53 per cent of the 206 birds that regularly cross Australian borders on migration are omitted from the migratory bird list attached to the EPBC Act.

As a result, birds well known to be threatened, like the Hooded Plovers that try to survive on the increasingly busy beaches of south-east Australia, remain unprotected despite ongoing declines.

The Threatened Species Scientific Committee, which overseas listing, is well aware of the deficiencies of its lists and has been trying to do something about it. However, despite the efforts of the under-resourced and overworked staff in the Department of Environment, attempts to update the list are glacial given the processes currently used for assessment.

Listing currently involves detailed submissions by members of the public that are exhaustively reviewed one by one, each review taking months. Almost 85pc of species on the EPBC lists are unchanged since the Act was drawn up in 1999. Most of these were a legacy of lists developed earlier still. Despite huge changes in threats, numbers and knowledge, it will be 2060 before all listed species are reviewed let alone deserving new ones added.

Originally the Act did insist that the lists had to be kept up to date. However, after a review pointed out that this wasn't happening, amendments passed in 2006 simply deleted the obligation. Of course, every review of the Act since then has pointed out the same problem, the latest being a Senate committee report handed down just before the recent election.

Reviews have also noted that omissions to the list are only part of the issue. Equally problematic are the species that are included on lists erroneously.

For birds, our review suggested that 22 of the EPBC listed "threatened species" probably should not be there. Similarly 32pc of the listed 287 migratory birds do not meet the definitions of migratory under the Act and only 38pc of the nearly 293 bird species listed as marine occur regularly in Commonwealth waters.

Bad listings damage the credibility and legitimacy of the Act.

As an example, the golden sun-moth used to be found only in native grasslands and grassy woodlands. These have lost 99pc of their original extent and the species is listed as "critically endangered" - the closest category to extinction. Now the moth has learnt to eat Chilean needle-grass, a noxious weed. Some companies with sun moth habitat dominated by Chilean needle-grass they wish to develop, have not only had to buy areas of native grassland to offset sun-moth habitat loss but have also had to destroy the needle-grass in which the moth was found.

Another example is the southern subspecies of squatter pigeon. In the nineteenth century it disappeared from NSW. However, it remains widespread through eastern Queensland as far north as the Atherton Tablelands. It remains listed as threatened under the Act even though it has been known for at least 15 years that the subspecies does not meet the listing criteria. As a result, it comes up time and again in assessments and has to be accommodated in conservation plans.

Most companies roll over when faced with obligations, even if absurd, because they need the permit. They do what is needed and get on with their business. But the payments rankle and provide fertile ground for concerns over green tape.

Bad listings end up bringing the Act into disrepute by insisting on the protection of environmental values that are not threatened and holding up developments that, under other circumstances, would be seen as legitimate.

As recognised by the Senate Committee, the solution is not all that difficult. Under current arrangements nominations for listing are sent to experts for review. This then influences the recommendations of the committee. The solution would be for those experts to review the lists in their entirety, assessing public submissions as part of the review. For only a few contentious species would the committee's judgement be required.

Such reviews could also make recommendations for removal of non-threatened species from lists - something that can currently only be initiated by the TSSC itself. At the moment, this rarely happens because the committee is so busy trying to ensure the list of the genuinely threatened is complete.

Migratory and marine species could readily be dealt with through the same process, though this would need agreement from partner countries.

Money spent by companies on threatened species as part of development proposals far outstrips any direct conservation expenditure. However, such outlays are an investment by the people in biodiversity since many of these costs are tax-deductible. It is therefore essential that they do actually benefit conservation not just pay expensive lip-service.

Surveys have shown that by far the majority of Australians do not want extinctions to occur. Many people, however, have heard stories of developments being delayed to protect species that seem to them to be coping pretty well.

They are often right. It is only with better lists that the EPBC Act will regain its social license and environmental regulation will be seen again as a legitimate way of protecting natural heritage that is at genuine risk of being lost or damaged.

Stephen Garnett is professor of conservation and sustainable livelihoods at Charles Darwin University