Aug 292014
 

Original story by Renee Cluff, ABC News

A species of turtle native to the tip of Queensland’s Cape York, the Jardine River turtle, has been officially sighted for the first time in 25 years.
Jardine River Turtle or painted turtle found in Cape York. Indigenous rangers and scientists have trapped 24 Jardine River turtles, which were last documented in 1989. Photo: Rick Gardiner

Jardine River Turtle or painted turtle found in Cape York. Indigenous rangers and scientists have trapped 24 Jardine River turtles, which were last documented in 1989. Photo: Rick Gardiner

It was thought the turtle may have been extinct, even though Indigenous locals had unofficially reported some sightings.

But Apudthama rangers and scientists from Origin Energy have trapped 24 Jardine River turtles, which were last documented in 1989.

Peta Standley from the Cape York Natural Resource Management Board said the turtles were found this week in two locations.

“They’re a range of sizes and a range of sexes as well, so now the next thing is trying to get some tracking devices on them and work out where they’re actually going to, because they think they’re nesting at the moment,” she said.

Indigenous head ranger Warren Strevens, who was involved in the rediscovery of the rare turtles in the region, said the reptiles were also known as painted turtles.

“They’re striking to look at,” he said.

“They’re a slender turtle, on the side of their heads, especially around the cheek area they’ve got a bright yellow stripe.

“Then as you go under the throat and down the neck, they’ve got a red stripe there, and all over their chest plate is a crimson red that’s almost fluorescent.

“There’s no doubt they’re a cute animal.”

He said the finds were especially significant for local Aboriginal people.

“They’re definitely sacred to one of the clan groups here,” he said.

“They’ve got a storyline about that turtle as well, so there’s a lot of significance in this find for the local region.”

He said the finds were especially significant for local Aboriginal people.

“They’re definitely sacred to one of the clan groups here,” he said.

“They’ve got a storyline about that turtle as well, so there’s a lot of significance in this find for the local region.”

Aug 232014
 

Original story by  , Science Network WA

NEW research shows the evolution of Australian rainbowfish was most probably caused by geological changes in the region, with the divergence into separate species probably occurring much earlier than previously thought.
The research also suggests rainbowfishes may be older than experts previously thought and provides a new framework for the timing of divergence within the family. Photo: Nathan Rupert

The research also suggests rainbowfishes may be older than experts previously thought and provides a new framework for the timing of divergence within the family. Photo: Nathan Rupert

A joint research initiative between the Western Australian Museum, Brigham Young University, and National Evolutionary Synthesis Center recently finished the most comprehensive phylogenetic analysis of rainbowfishes ever undertaken, which included virtually all rainbowfish species.

The research explored the biogeographic history of rainbowfishes in Australia and New Guinea, to determine how the various species are related to one another and how the geography of the region relates to their evolution.

Dr Peter Unmack says the study shows geography is a key indicator as to whether any two species of rainbowfish are closely related.

“We had collected samples extensively over the years and I began conducting DNA sequencing and gradually built a bigger and bigger data set,” he says.

“The major finding was the importance of geographic distribution, which confirms previous findings but this was a lot more thorough in that we had virtually all of the species included.”

The research also suggests rainbowfishes may be older than experts previously thought and provides a new framework for the timing of divergence within the family.

“The central Highlands of New Guinea have been going up very fast for the past five million years, and researchers previously thought that when the mountain range began to rise, the fish in the north were isolated from the fish in the south,” Dr Unmack says.

“We have shown that rainbow fish actually diverged much earlier than that, perhaps as much as 17-20 million years before the north-south separation. The geology suggests things should be young, but the genetics says things may be older than predicted.

“There was a lot of introgression among the groups.

“Essentially, some of the species within the group have mixed with other species at particular times in the past and then separated, and so have a lingering genetic history that includes the other species they’ve mixed with.

“Species breeding with other species creates gene flow between species, and yet rainbowfishes still maintain themselves as separate entities.”

Researchers also documented 15-20 undescribed species of rainbowfish, with as many as 10 of these occurring in Australia.

“Rainbowfishes are a very important Australian group, one that we consider well studied, and that has been very actively worked on for 25 years, so to discover these undescribed species highlights how much work is still to be done on sorting out the taxonomy of Australian fishes.”

Aug 232014
 

Original story by Charlotte King, ABC News

A small native fish with a low community profile is finally getting a name for itself in the Murray Darling Basin.
Koorlong Primary School students Ebony and Charlise were involved in some of the ideas that went into the book, aimed at increasing the profile of the Murray Hardyhead Photo: Charlotte King - ABC Local

Koorlong Primary School students Ebony and Charlise were involved in some of the ideas that went into the book, aimed at increasing the profile of the Murray Hardyhead Photo: Charlotte King – ABC Local

The Murray Hardyhead is a shiny, small-bodied fish with large silvery eyes.

“They only grow to about 10cm in size, and they were found locally and up and down the Murrumbidgee historically,” says Michelle Kavanagh, the Murray Darling Freshwater Research Centre’s communication advisor.

“But they’ve become much more rare, to the point where they’ve been threatened with extinction.”

The fish prefer to live around the edges of lakes, in wetlands and backwaters; but recently the Murray Hardyhead has had a tough time staying alive.

As wetlands dried up with the millennium drought and salinity in remaining waters increased, whole populations of the fish have become extinct in much of Victoria and NSW.

“We got to the stage where they were only found in six or seven isolated wetlands – that was it,” says Ms Kavanagh.

“There was a couple of handfuls of populations left in the basin.”

Drawing in the community

As many of the remaining populations were in waterways around Mildura, including Cardross Lakes, Koorlong Lake and Lake Hawthorn, the MDFRC went about drawing those communities into a project to help conserve the fish.

The best way to do this, says Ms Kavanagh, was through the local primary schools.

“They’re small schools in a rural environment, and these are small wetlands, or small fish in an isolated environment,” she says.

“So we were able to make that connection, and start talking about the habitat the fish requires and what decisions and actions communities can make so that the fish has a chance.”

Ms Kavanagh says that unlike the Murray Cod, the community profile of the Murray Hardyhead is pretty low.

“They’re not iconic, they’re not big and easy to identify; they’re not targeted by anglers.”

“[But] when you’re involved in ecology their relevance in the food web becomes really obvious – they are fish food for bigger fish, and they also have close relationships with water plants and water bugs.”

So she decided the best way to get the community interested was through the creation of a children’s book:Hi! My name is Murray: Murray Hardyhead.

“We write these reports, we put the information on our website, and it’s not particularly engaging for the general community,” says Ms Kavanagh.

“Targeting primary schools we felt that through the students we’d be reaching families as well.”

A real life example

The book was created over a term alongside school activities to help students understand conservation, native fish and threatened species in the Basin.

Students were asked to reflect on what they were learning by putting together artwork that ultimately inspired the book’s design and text.

The principal at Koorlong Primary School, Stuart Pain, says the students embraced the project.

“We thought we’d make it a whole-school activity and went down and did some fish sampling and checked the quality of the water,” he says.

“[Between] 80-90 per cent of the kids did not know they had Koorlong Lake out the back of the school – or they had fish in them.”

“It was a real life example,” says Mr Pain.

He says next week the school will revisit the Koorlong Lake to check on their efforts to repopulate the area with Murray Hardyhead fishlings.

“So hopefully, they’ve survived,” says Mr Pain.

Twelve-year-old Ebony Douglass says even though the Murray Hardyhead is a little fish, it deserves to be conserved.

“It was a big project for just a small little fish,” she says.

“[But] anything that’s endangered is important to help keep alive.”

The book has now been distributed to other schools where the Murray Hardyhead lives and across selected primary schools and libraries around Australia.

Aug 192014
 

Original story at ABC News

The critically endangered western trout minnow has been bred in captivity for the first time, in a program that is hoped will help shore up the population.

The western trout minnow was the first freshwater fish species in Australia to be listed as critically endangered. Photo: Department of Fisheries WA

The western trout minnow was the first freshwater fish species in Australia to be listed as critically endangered. Photo: Department of Fisheries WA

The western trout minnow is so rare it is only found in three small rivers in WA’s Great Southern region.

It was the first freshwater fish species in Australia to be listed as critically endangered.

Researchers from the University of Western Australia and the Department of Fisheries have managed to breed the fish in a laboratory, and hope to restock the rivers in a couple of years.

Principal research scientist Dr Craig Lawrence said there is also a team examining the reasons why the fish are becoming extinct.

“They are specifically looking at the reasons why several rare species in WA have got very low numbers in the wild,” he said.

“Once those factors are identified, we will put together a strategy to address them and it’s only then that we would look at restocking.”

Dr Craig Lawrence has bred the rare minnow in captivity for the first time. Photo: ABC News/Anna Vidot

Dr Craig Lawrence has bred the rare minnow in captivity for the first time. Photo: ABC News/Anna Vidot

In 2006 it was estimated that between 2,000 and 5,000 minnows remained in the wild.

Dr Lawrence said researchers had to break new ground in figuring out how to breed the fish.

“We had to work out how to keep them, feed them, breed them, incubate the eggs, raise the embryos, hatch the larva out, and rear them up to fry,” he said.

“They need specific cues to breed. They need the right flow rate, the right temperature, the right barometric pressure.”

He said weirs and dams on water bodies changed the way the rivers flow, which affected the fish’s breeding in the wild.

In one case, researchers built a “fish ladder” to help the animals get around the barriers, and this may need to be installed in other areas too, Dr Lawrence said.

Western trout minnow embryos. Photo: Department of Fisheries WA

Western trout minnow embryos. Photo: Department of Fisheries WA

The fish’s size was also a factor in breeding it in captivity, he said.

“When we’re talking about these fish, we’re scaling everything down to 1:1000 of what we would usually use,” he said.

“The accuracy of the injections and anaesthesia we use have to be very rigorous and there’s very little room for error.

“No-one else has used these techniques before for a fish of this size.”

The research has been carried out over five years, but the fish only breed four weeks out of the year, Dr Lawrence said.

Jul 302014
 

The next ANGFA Queensland meeting is on Friday, August 8 at 7:30.

Facebook event here

David Roberts with a sizable lungfish.

David Roberts with a sizable lungfish.

This meeting we’ll have a presentation from David Roberts of Seqwater with an update on the latest lungfish research and management work he’s been involved with.

We’ll also have a slide show from our secretary who recently had the opportunity to visit Edgbaston Reserve with a crew from Bush Heritage Australia.

Group at Edgbaston Reserve

Group at Edgbaston Reserve

If you’re not a member please feel free to come and have a look, you can join on the night if you’re interested. The club shop with dry goods, supplies, new photo tanks and hopefully new nets will be open, as will the drinks stand. There’ll be an auction after the talks where anyone can buy, though you must be a member to register as a seller.

The next ANGFA Qld meeting is at the Bar Jai hall – 178 Alexandra Road, Clayfield. Friday night 9/8/2013 starting at 7:30 pm sharp!

The next ANGFA Qld meeting is at the Bar Jai hall – 178 Alexandra Road, Clayfield. Friday night 8/8/2014 starting at 7:30 pm sharp!

Jul 292014
 

Date: Sunday 24 August 2014

Warrill Creek above Churchbank Wier. Photo: Sweetwater Fishing

Warrill Creek above Churchbank Wier. Photo: Sweetwater Fishing

Species we might locate:

* Melanotaenia duboulayi (Crimson Spotted Rainbowfish)

* Pseudomugil signifer (Pacific Blue-eyes)

* Retropinna semoni (Smelt)

* Hypseleotris galii (Firetail Gudgeon)

* Ambassis sp. (Glassfish)

* A range of invertebrates

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Field trip details are restricted to ANGFA Qld members.

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If you are a member please contact us so we can fix your account.

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Click here to log in or register.

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Meeting Location:

Meet in the car park behind the IGA at Walloon (on the roundabout, opposite the Walloon Hotel)

Getting to Walloon:

From Brisbane, take the Warrego Highway towards Toowoomba.

Take the turnoff to Walloon/Rosewood (just past Blacksoil) which puts you on the Haigslea-Amberley Road. Head south (left) for 3km to reach Walloon.

Departure Time:

8.30 am. This is the time we will leave the meeting point.

Program:

This program is tentative only and may change due to weather and water levels

0830 – 0900: Travel to first fishing location.
0900 – 1230: Fish Churchbank Weir on Warrill Creek and Seven Mile Bridge on Bremer River
1230 – 1300: Travel to Walloon
1300 – 1400: Lunch at the Walloon pub (buy your own)

CHECK THE ANGFA FORUM THE FRIDAY OR SATURDAY BEFORE THE TRIP TO CONFIRM THAT IT’S STILL ON

Bring:

Wading boots or waders, dip nets, folding bait traps, bait or burley for the traps, buckets (with lids), a field tank for photography, an esky or styrofoam box to hold the fish in, plastic bags for the fish, rubber bands, non- iodised salt (cooking salt, rock salt, etc), drinking water, sunscreen and insect repellent, fish and plant identification books, goggles and snorkel (for the brave), and water test kits if you have them (hardness, total hardness, pH, dissolved oxygen, salinity, etc).

Remember:

We are a conservation society. We are not there to rape and pillage.

Take only as much as you need to display or breed. It is illegal to sell fish from the wild without a licence.

An important part of each field trip is to survey and record the water conditions and what we find, and any assistance with this task will be appreciated.

Size and bag limits and equipment regulations apply when fishing in fresh water in QLD. You can find the QLD bag and size limits here: http://www.dpi.qld.gov.au/28_2994.htm

You can find the QLD fishing equipment regulations here: http://www.dpi.qld.gov.au/28_3023.htm

Nomination:

To nominate for the field trip please contact the Field Trip Coordinator: Leo O’Reilly, Mob: 0438 733 789, Email: oreilly1@bluemaxx.com.au[/s2If]

Jul 092014
 

Original story by Peter Kyne, Charles Darwin University at The Conversation

Sawfish are the most endangered group of marine fish in the world, largely thanks to overfishing and habitat loss. Formerly abundant, they have disappeared from many countries’ waters, and in many others they are scarcely holding on.
The world’s five species of sawfish are the most threatened fishes in the world. Photo: David Wackenfelt

The world’s five species of sawfish are the most threatened fishes in the world. Photo: David Wackenfelt

To put it bluntly, sawfish have been devastated. But we could reverse the trend. Recently the International Union for Conservation of Nature’s Shark Specialist Group released the first Global Sawfish Conservation Strategy. It won’t be easy, but they are steps we need to take if we are to save the world’s threatened sawfish. Continue reading »

Jul 062014
 

Original story at ABC Tropical North

A north Queensland community is trialing the use of barramundi to eradicate a pest fish from public waterways.
Volunteers release barramundi into the Gooseponds in Mackay to help reduce the number of tilapia, a South African fish that is harmful to native species. Photo: Kim Kleidon, ABC Local

Volunteers release barramundi into the Gooseponds in Mackay to help reduce the number of tilapia, a South African fish that is harmful to native species. Photo: Kim Kleidon, ABC Local

The South African tilapia has been introduced into the Mackay Gooseponds and experts fear they could take over and threaten native species.

Reef Catchments aquatic habitats coordinator Tim Marsden says the species was first identified in far north Queensland in the 1970s.

“There’s no natural predators to tilapia here in Australia, they can survive in hot water, cold water, low dissolved oxygen, really poor water… and so that means whenever we’ve got any conditions, for example an urban waterway where you might have less than ideal conditions, tilapia will end up dominating that waterway,” he said.

He says while tilapia are very difficult to eradicate, he hopes the use of 1,000 barramundi will help reduce the number of fish in the pond.

“We’re putting up a biological control option as a trial to see if we can do something,” said Mr Marsden. Continue reading »