Australian Aquatic Biological

Australian aquatic biodiversity research and consultancy

A New Spiny Crayfish in Western Drainage, NSW.

Project: 100007 started back in 2008 final draws to a closure. The project that started out as an unidentified Euastacus crayfish species has been found in western drainage of NSW has been finalized with the completion of the project going to press.

The New Euastacus species for NSW showing an unusual colour variation

The New Euastacus species for NSW showing an unusual colour variation

A scientific manuscript title; Euastacus sp. nov., a new giant spiny crayfish (Crustacea, Decapoda, Parastacidae) from the Great Dividing Range, New South Wales, Australia, by Robert B. McCormack & Shane T. Ahyong has been completed and submitted to the journal Zootaxa.

The New Euastacus is a true spiny crayfish with numerous large sharp spines

The New Euastacus is a true spiny crayfish with numerous large sharp spines

The new species is described from the upper Cudgegong River, New South Wales, Australia This new species occurs in the western drainage of the Great Dividing Range, and is most closely related to E. spinifer (Heller, 1865), which occurs on the eastern side of the range. The new species differs from E. spinifer by its considerably smaller maximum size, greater degree of thoracic spination loosely arrayed in three instead of two rows, genetic sequence divergence in COI and unusual colour variations.

The new species is small in size with the majority of the female population breeding each year

The new species is small in size with the majority of the female population breeding each year

Both Euastacus armatus and the new Euastacus species occur in the upper Cudgegong River and this has led to much confusion in the past. Recent research by Whiterod et al., 2016 indicates that the E. armatus population in the upper Cudgegong is a translocated population.

In our present study, we formally describe this new Euastacus species, increasing the number of species of Euastacus to 53.

Cheers
Rob McCormack

Disused Aquaculture Ponds Wanted to Lease

Got an aquaculture facility that’s not operational or not making the amount of money you desire. Why not lease your farm or your ponds? We have clients in desperate need of ponds now.

Aquaculture is the fastest growing primary industry in Australia. Demand for aquacultured produce is skyrocketing and new production methods are increasingly improving profit margins making modern land based aquaculture an increasingly lucrative enterprise.

Unfortunately, difficulties in obtaining approvals for new ponds and the ensuing time delays in receiving approvals and then building ponds makes the interest level in existing ponds extremely high.

Existing yabby and fish ponds are wanted now so that large scale commercial farmers can expand their production by using your ponds. They come to you, use their staff, their equipment and technology, to get your ponds into commercial production. They don’t need you to do anything at all, you do not need to expend one cent towards the enterprise. They just rent your ponds or property nothing more.

If you have ponds not producing much or haven’t been in production for years then contact us for further details. Perhaps we have a lucrative solution to create a substantial, reliable income without any effort or expense from your end.

Contact

Rob McCormack

RBM Aquaculture

rob@rbmaqua.com.au

The Australian Crayfish Project Team Visits Tasmania

In early May four members of the ACP visited Tasmania.  We are also members of the NSW Aquaculture Association and one of the reasons for visiting Tassie was to visit Huon Aquaculture. For an article of Huon see: http://nswaqua.com.au/huon-aquaculture-sea-cages/  Whilst in Tassie we took full advantage of the opportunity and travelled the country from one end to the other. We flew into Launceston and hired 3 campervans, Paul and I had one each and the Burnes brothers shared a van. Despite the constant rain, snow and wind we had a great time in Tasraina.

Our first camp site

Our first camp site

The first night saw us camped at the end of a small track on the Great Forester River. We didn’t have any bait so dragged a bit of road kill (dead wallaby) and tied that up on the edge of the river to see if it attracted anything.

The bait-a dead wallaby

The bait-a dead wallaby

Paul Burnes with a 1.5kg Astacopsis gouldi

Paul Burnes with a 1.5kg Astacopsis gouldi (eastern Tasmania)

Surprisingly we managed to attract a 1.5 kg giant Tasmanian lobster. It was a bit of a surprise and only quick action by Craig saw it captured by hand. It was a female but not berried even though I would have expected it to be breeding season. After a photo shoot we release here back into the river, but a great start for us.

Galaxias were common and abundant

Galaxias were common and abundant

We observed large numbers of eels in the creeks and lots of Galaxias as we spotlighted the creeks and rivers at night.

Opportunistic surveying

Opportunistic surveying

We didn’t have a plan as such we were just driving around checking out the country side and stopping at likely spots to see if we could find a crayfish and have a photo shoot of the catch of the day.

Tasmanian Engaeus laevis

Tasmanian Engaeus laevis

Engaeus crayfish were quite common and the first specimens we found were Engaeus laevis.

Engaeus fossor

Engaeus fossor (green tint)

We also found a number of Engaeus fossor. Interestingly we found quite a large colour variation in the species.

Engaeus fossor

Engaeus fossor (Tan tint)

Engaeus crayfish are relatively easy to find, their presence is given away by their chimney shaped burrows. They are a deep burrowing crayfish so knowing where they live and then actually getting a specimen out of the burrow is a very different matter.

Looking for Engaeus crayfish

Looking for Engaeus crayfish

Large parts of Tasmania suffered from bush fires over summer. This however made it easier for us to find the burrows.

Engaeus burrows

Engaeus burrows

Its always good to find something new. Paul V managed to catch an Engaeus lengana. Thats the first time I’ve ever seen one so very happy with that catch.

Engaeus lengana

Engaeus lengana

Just being tourists an traveling around the whole state we didnt have much in the way of survey equipment, basically it was all capture of crayfish by hand.

Looking through a creek

Craig looking through a creek

Small creeks in remote areas produced a surprising number of crayfish species. This creek was full for Astacopsis tricornis.

Astacopsis tricornis

Astacopsis tricornis

Unfortunately, the weather was less than cooperative with high winds and rain. The state was in drought till we got there. Once we arrived the heavens opened.

Blocked roads were a repetitive theme

Blocked roads were a repetitive theme

Nearly all our travels through Tassie were on the back roads. Unfortunately, with the high winds and rain, trees down were a huge problem for us. The boys managed to clear this fallen tree with the saw on a pen knife. We managed to get another 2 km up the road before we were stopped by huge fallen trees that completely blocked the road.

Another roadside campsit

Paul V (left) and Paul B (right) at another roadside campsite

We were fully self sufficient so we would make camp, survey the area around the camp and await rescue by someone with a big chainsaw.

Rob McCormack with a Giant Tasmanian Lobster Astacopsis gouldi

Rob McCormack with a Giant Tasmanian Lobster Astacopsis gouldi

One of the highlights of the trip was spending some time with Todd Walsh and researching the Giant Tasmania Lobster Astacopsis gouldi. We all had a great time with Todd who was a wealth of information on this iconic species. If you would like to read more about our time with Todd see: http://www.austcray.com/2016/06/tasmanian-giant-freshwater-lobster-astacopsis-gouldi/

Paul Van der Werf with a 2.5 kg Astacopsis gouldi

Paul Van der Werf with a 2.5 kg Astacopsis gouldi

Despite the rain Craig Burnes is happy with this Astacopsis gouldi he caught

Despite the rain Craig Burnes is happy with this Astacopsis gouldi he caught

I had a fantastic time in Tassie with a great bunch of mates. We were cold an wet most of the time, spent long hours going short distances, spent hours digging holes, trudged up and down mountains, had to abandon camp in the middle of the night just before the floodwaters washed us away, cleared fallen trees off the road with a penknife, and spent endless hours at the end of the trip cleaning the mud out of our campervans, but despite all that- I wouldn’t have missed for the world.

Cheers

Rob

East Gippsland Survey Season Commences 2016

Euastacus crassus

Euastacus crassus upper Murray River

The high country of East Gippsland is a difficult area to survey as the window of opportunity is small. In summer it’s too hot and subject to bushfires and road closures. In winter, it’s too cold and the crayfish have retired to their deep burrows being extremely difficult to find. This just leaves the spring and autumn crayfish survey season.

Our surveys in East Gippsland are targeted to answer a number of questions we have concerning the species present and their distributions. Unfortunately, the more we research the more questions are raised and we don’t seem to be making much forward progress despite accumulating huge amounts of new information.

 

1st Survey

The first survey was conducted in March by Craig Burnes and Rob McCormack, of the upper Murray and upper Snowy River tributaries in the Victorian Alpine National Park.

New Euastacus crassus Little River

New Euastacus crassus Little River

They surveyed the start of the Murray River from its most eastern and southern point in the Alpine National Park of Victoria. They were looking for Euastacus rieki, Euastacus claytoni and Euastacus crassus which occur in tributaries of the Murray River further north. What they found most closely matched Euastacus crassus in morphology but had a gastric mill count closer to Euastacus claytoni. Morgan 1997 did record lower TAP counts from specimens further west from the Bogong High Plains but genetic analysis will be very interesting.

Gastric mill upper Murray River

Gastric mill upper Murray River

Craig and Rob also surveyed the adjoining drainages of the upper Snowy River. The Little, Suggan Buggan and Buchan rivers were surveyed providing comparative material. Specimens from the Little River a tributary of the Snowy River for example vary in morphology but the gastric mill more closely resembles the norm for Euastacus crassus.

Gastric mill upper Little River (Snowy Rv)

Gastric mill upper Little River (Snowy Rv)

Specimens collected from each drainage will be included in a broad genetics study including specimens from the Tambo River in Victoria and the new population of E. crassus discovered in the Shoalhaven drainage. Stay tuned for results.

For further information on Euastacus crassus from the upper Murray & Snowy rivers see http://www.austcray.com/2016/04/alpine-national-park-victoria-new-euastacus-crassus/

 

2nd Survey

Surveys of the eastern tributaries of the Snowy River have been completed and resulted in the redescription of Euastacus diversus.

Coughran J, McCormack RB and Fetzner Jr. JW (2015). Re-description of the Orbost spiny crayfish, Euastacus diversus Riek 1969 (Decapoda: Parastacidae), in eastern Victoria, Australia. Freshwater Crayfish 21(1): 185-197.

In that paper we identified the species occurring within the next drainage east – the Bemm River as being a potentially new species. This has generated a species specific project, requiring the surveying of the Bemm and adjoining eastern drainages.

As part of this project an ACP survey team gathered to survey the Arte River drainage a major tributary of the Bemm River. We hadn’t surveyed this river before so it was essential information needed as part of the project to help increase our knowledge base.

Andrew Lincoln, Craig Burnes, Rob McCormack, Joe Henderson, Jo Edwards, Jim Reside

The Team – Andrew Lincoln, Craig Burnes, Rob McCormack, Joe Henderson, Jo Edwards, Jim Reside

The team consisted of Andrew Lincoln, Craig Burnes, Rob McCormack, Joe Henderson, Jo Edwards and Jim Reside. We met up in Orbost and Kuark Forest to survey the tributaries of the Arte River.

Euastacus sp. Arte Rv - Spec 5737

Euastacus sp. Arte Rv – Spec 5737

We surveyed a large number of streams and were successful in finding Engaeus, Euastacus sp, and Euastacus kershawi. We were specifically targeting Euastacus sp and the specimens collected will be used for our morphological and genetics program for this species. Further surveys are needed in the other tributaries of the Bemm and adjoining drainages, hence, this project will continue for some time.

Euastacus sp. Arte River, Victoria

Euastacus sp. Arte River, Victoria. Spec 5739

My thanks to the team members who guided us through the back roads of the forest despite many of them being disused and overgrown.

The survey convoy held up by a blocked road

The survey convoy held up by a blocked road

Clearing the forest road

Clearing the forest road

The 3rd Survey

Was conducted by Craig Burnes and Rob McCormack of tributaries of the Cann and Genoa Rivers. This survey again created more questions than answers. We were expecting to find Euastacus bidawalus and we were successful in finding them with the ones we found matching the morphological description of E. bidawalus. Then however, we found specimens in the Genoa River catchment that did not match the current description. This is a dilemma, is this just morphological variation between populations 1 km apart or two separate species. Instead of answers again more questions and further research needed.

Euastacus bidawalus, Cann Rv, (Spec 5751)

Euastacus bidawalus, Cann Rv, (Spec 5751)

Euastacus sp, Genoa Rv, (Spec 5755)

Euastacus sp, Genoa Rv, (Spec 5755)

It’s always a pleasure investigating the East Gippsland forests and streams; we will be back as soon as we can to do it all over again.

Cheers

Rob McCormack

 

 

Orbost Spiny Crayfish paper finally published

Euastacus diversus from Ellery Creek (Brodribb drainage) showing 2 marginal squamal spines

Euastacus diversus from Ellery Creek (Brodribb drainage) showing 2 marginal squamal spines

Started in 2005 the quest to rediscover the Orbost Spiny Crayfish Euastacus diversus has been a long and intriguing journey cumulating in the publication of this paper.

This story began back in 1959 when one of Australia’s foremost expert on freshwater crayfish at that time, Edgar Riek, discovered this small freshwater crayfish species in the east Gippsland region of Victoria. Then in 1969 he described the species and named it Euastacus diversus. Since that day this crayfish has remained a rare and elusive species.

In 1986, the then current expert on the genus Euastacus, Gary Morgan, searched for this species but was unable to find any in the wild. As a consequence he redescribed the handful of original specimens collected by Riek in 1959 that are held at the Australian Museum. Gary Morgan’s detailed description, published in the Memoirs of the Museum of Victoria 30th May 1986, was the latest scientific publication on this species and forms the basis of all current information and opinions until now.

In 2005, the Australian Crayfish Project (ACP) was started, involving one of the largest projects researching freshwater crayfish ever seen in Australia. Between 2005 and 2007 we also failed to find any specimens of Euastacus diversus for the type locality general area 40 miles north of Orbost. Then in 2007 we changed our methods and successfully started finding more and more specimens. Up to 2011 a considerable number of E. diversus and other Euastacus species were found in the wild. The project has been very successful in finding this and other crayfish species, and large areas of southern NSW and eastern Victoria were systematically biologically surveyed specifically for freshwater crayfish. We found Euastacus specimens everywhere and most did not match the description for the known species leading to much confusion. However, genetic analysis by the Carnegie Museum of Natural History in the USA helped clarify the situation resulting in the thorough redescription of E. diversus and the discover of a number of new species.

Euastacus diversus redescription 2015

Euastacus diversus redescription 2015

The research culminated in this paper titled “Re-description of the Orbost Spiny Crayfish, Euastacus diversus Riek 1969 (Decapoda: Parastacidae), in Eastern Victoria, Australia” published in the journal “Freshwater Crayfish”. The paper redescribes Euastacus diversus to include the Bonang River crayfish (previously thought to be a new species).

The Bonang River crayfish from the most northern extent of distribution

The Bonang River crayfish from the most northern extent of distribution

The Bonang taxon represent a morphologically distinct population of Euastacus diversus that is genetically 1.95% divergent from the E. diversus type locality populations.

Euastacus diversus from Riddle Creek

Euastacus diversus from Riddle Creek

The research extends the distribution of the species to the Brodribb, Yalmy, Rodger and Bonang River drainages at elevations ranging from 350 – 950 m a.s.l., with an overall Extent of Occurrence of 465 km2. Research continues on E. diversus which will surely increase the Extent of Occurrence. Research also continues on the new Euastacus species and hopefully the first of the new species descriptions will be published later this year.

Citation:

Coughran J, McCormack RB and Fetzner Jr. JW (2015). Re-description of the Orbost spiny crayfish, Euastacus diversus Riek 1969 (Decapoda: Parastacidae), in eastern Victoria, Australia. Freshwater Crayfish 21(1): 185-197.

 

.

Page 1 of 1112345...10...Last »