Sciences

DISPLAYING POSTS FILED UNDER: Sciences (245)

Sciences

Natural history - from animals to minerals, fossils to sea slugs. MV's scientists use the state's collections in important research.

Dinosaur diorama

Author
by Adrienne Leith
Publish date
18 November 2014
Comments
Comments (1)

Adrienne creates and presents public programs at Melbourne Museum.

Imagine a Victorian Cretaceous rift valley complete with river bed, trees and a suite of prehistoric animals. Now imagine it recreated in miniature in a classic museum diorama: the DINORAMA!

Displayed in front of the Forest Gallery, the Dinorama will be the feature activity of our summer school holidays at Melbourne Museum. We're inviting visitors to make thousands of Cretaceous animals to fill the little landscape with life.

model of dinosaur Serendipaceratops arthurcclarkei was a horned dinosaur, fossils of which were found at Kilcunda. Kim Haines made this tiny version.
Source: Museum Victoria
 

In consultation with our palaeontologists, our preparators made miniatures of three animals—Koolasuchus cleelandi, Serendipaceratops arthurcclarkei and Qantassaurus intrepidus—that lived in Victoria approximately 120 million years ago. From the models, the preparators make moulds…. and from the moulds, summer visitors can create thousands of little beasts from modelling clay.

model of dinosaur Michael Pennell's model of Koolasuchus cleelandi, a three-metre-long predator that lived in and around fast-flowing cold streams. Fossils of Koolasuchus were were found on the coast of Victoria just east of Phillip Island.
Source: Museum Victoria
 

Every couple of days we'll bring out a new colour of clay until we have a Dinorama filled with multi-coloured ancient animals. Our school holiday activities start on 26 December, so keep an eye on the Melbourne Museum foyer after then.

modelling a dinosaur Inverloch was the discovery site of Qantassurus intrepidus, a small herbivorous hypsilophodontid with large eyes for foraging in long polar winters. Brendon Taylor created this model. You can see an animatronic Qantassaurus in the 600 Million Years exhibition.
Source: Museum Victoria
 

Spawning sea anenomes

Author
by Michela Mitchell
Publish date
5 November 2014
Comments
Comments (1)

Michela is the first resident taxonomist of Actiniaria (sea anemones) in Australia. This title doesn't come with a ceremonial sash, but it should.

The Field Naturalists Marine Research Group members Joan Hales and Janet Davies sent me this gorgeous photo of the Victorian sea anemone, Oulactis sp., spawning last week.

Spawing sea anemone Female Oulactis sp. spawning with tiny pink eggs on the oral disc.
Image: Joan Hales
Source: Joan Hales
 

Sea anemones are closely related to corals and so, like corals, they spawn under the right conditions and environmental cues, usually in spring and summer. This can be associated with cycles of the moon. This particular anemone reproduces by broadcast spawning; females and males release eggs and sperm into the water column, where the tides and currents brings spermatoza into contact with the eggs for fertilisation.

This method is not for all species of anemones, however. Some have cunningly evolved various methods of reproduction (sexual and asexual) so they can stick around as long as they need to. Some species can even change the way they reproduce: they can clone themselves, they can split in half (fission), or leave a small fragment of their pedal disc (laceration) behind and a whole new anemone can grow. They can even be male and female together (hermaphroditic). They leave nothing to chance ensuring their survival on Earth – so far 600 million years and counting!

Filming our underwater backyard

Author
by Kate C
Publish date
23 October 2014
Comments
Comments (0)

What do you know of the Vampire Squid? How about the Dragonfish, the Sea Mouse and the Fangtooth? These bizarre animals live kilometres – yes, kilometres – beneath the ocean’s surface. We’ve brought them up to sea level for you to meet at the exhibition Deep Oceans, which opens this weekend at Scienceworks.

Anglerfish exhibit Deep Oceans Anglerfish exhibit
Image: Australian Museum
Source: Australian Museum
 

This exhibition comes to us from the Australian Museum and we’ve added some local characters to the mix. Parks Victoria tells us that nearly half of Port Phillip is less than eight metres deep, and its greatest depth is only 24 metres. It’s just a puddle compared to the true deep oceans. This means we can see a huge diversity of our marine life just by heading out into the bay with a mask and snorkel.

 

Over the past months, Dr Julian Finn has filmed seals, fish, crabs and others in our local marine parks with a fish-eye lens. This footage will be projected inside the Underwater Backyard virtual aquarium dome, where you can stand right beside the bay’s residents without getting wet.

Deep Oceans is at Scienceworks 25 October 2014 to 12 April 2015.

Beetle back from the dead

Author
by Ken Walker
Publish date
15 October 2014
Comments
Comments (2)

Ken is our Senior Curator of Entomology.

On Monday last week, live images of an attractive Australian lady beetle popped up on the BowerBird citizen science website photographed west of Portland, Victoria. The photographer recorded seeing more than 50 beetle specimens in a small swampy area.

beetle Micraspis flavovittata ladybird beetle photographed in October 2014.
Image: Reiner Richter
Source: CC BY 3.0 AU
 

There is a wonderful CSIRO lady beetle website with a gallery of images for all known extant Australian species, however we were unable to match the photo to any in this gallery. So we sent the BowerBird images to the Canberra scientist who created the website. His initial reaction was to doubt the veracity of the locality data as he claimed this was not an Australian species. I reconfirmed the Australian locality with the photographer so we began to wonder if this was an invasive species.

The images were then forwarded to the world lady beetle expert at the Natural History Museum (NHM) in London. We received news on Friday night from Roger at the NHM that this is a species "back from the dead". A species not seen or recorded for more than a 50 year period is considered to be extinct. There are only 4 known specimens of this species in collections (2 at the NHM and 2 at Museum Victoria) - the last specimen was collected in 1940!

Micraspis flavovittata Micraspis flavovittata beetle
Image: Reiner Richter
Source: CC BY 3.0 AU
 

This is indeed an Australian species, Micraspis flavovittata (Crotch, 1874). I remember we once had an exhibition at the museum called Extinction is forever…. and so it is, until someone finds it again! The only known localities of this species were Narbethong and Kallista so the Portland location is well west of these previous records.

Many people contend that the best citizen science projects are those in collaboration with professional scientists. Personally, I love the serendipity of citizen science discovery alone.

Links:

BowerBird

The joy of spring in Milarri Garden

Author
by Jessie
Publish date
10 October 2014
Comments
Comments (2)

When was the last time you took a wander along the Milarri Walk? Many people say never; it’s one of the not-so-hidden gems at Melbourne Museum. This indigenous garden runs from the North Terrace (behind the Forest Gallery) through to Birrarung. In spring it is especially lovely with what our horticulturalists say is “too many flowers to mention." If you are lucky you may catch them working in the space to ask a question or two.

Chocolate Lily flower The Chocolate Lily (Arthtopodium strictum) is one of the many plants in full flower in Milarri Garden at the moment. Take the time to stop and have a smell – they smell like chocolate.
Image: Jessie Sinclair
Source: Museum Victoria
 

Another great feature at the moment is our impressive Pondi, otherwise known as Murray Cod (Maccullochella peelii). Pondi is an Indigenous name for this impressive animal. He can be spotted swimming in the upper area of Milarri Creek and is quite visible from the bridge. Pondi features in many Indigenous stories as the creator of the Murray River and the fish species found there. Although called a ‘cod’, they are not related to the northern hemisphere marine cod species. They are found in varied waters from clear flowing streams to billabongs in the Murray Darling Basin.

Murray Cod Pondi the resident Murray Cod (Maccullochella peelii) in the upper reaches of Milarri Creek.
Source: Museum Victoria
 

It is not just people who love this little hidden oasis in the museum but also the local wildlife. A Red Wattlebird (Anthochaera carunculata) has built a nest in the River Red Gum (Eucalyptus camaldulensis) overhanging the creek and with any luck will be raising chicks in the next few weeks. We also have regular visits from Crimson Rosellas, Lorikeets, Boobook Owls and Tawny Frogmouths who choose to forage and rest in the garden.

Tawny Frogmouth in a tree Many bird species take refuge at Melbourne Museum. This Tawny Frogmouth (Podargus strigoides) is a regular resident on the North Terrace.
Source: Museum Victoria
 

With the warmer weather many of our animals have come out and are getting hungry so we are regularly feeding the Short-Finned Eels, Silver Perch and Short Necked Turtles in the lower pond. You can catch this feeding and a talk occurring daily at 1.45. 

Fin win was no whale fail

Author
by Colin
Publish date
3 October 2014
Comments
Comments (0)

You may call me crazy for putting my hand up again for the chance to end up knee-deep in a decomposing whale. This time, the whale that washed up on Levy’s Beach near Warrnambool in Western Victoria was a Fin Whale (Balaenoptera physalus). Fin Whales are the second largest species of whale and can reach up to about 25m long and weigh more than 50 tons! They feed mostly on krill and can consume between one and two tonnes per day during the summer months when ocean productivity is high.

Fin Whale washed up a beach The Fin Whale washed up on the beach.
Image: Colin Silvey
Source: Museum Victoria

Upon hearing of the news of the wash up, Museum Victoria put together a team to retrieve it, along with the Australian Marine Mammal Conservation Foundation (AMMCF) and Melbourne Zoo. The Department of Environment and Primary Industries (DEPI), Parks Victoria and the Cultural Heritage Officer were of great assistance in organising planning, logistics, contractors, public engagement and working near the significant cultural heritage sites in the area.

Bentley Bird on the beach MV's Assistant Vertebrate Collections Manager Bentley Bird ‘gloves up’ ready for tissue sampling.
Image: Colin Silvey
Source: Museum Victoria

Kate Charlton-Robb with the Fin Whale Australian Marine Mammal Conservation Foundation’s founding director Kate Charlton-Robb collects a tissue sample for future research.
Image: Colin Silvey
Source: Museum Victoria

Whale on beach A wave crashes over the whale’s starboard side. Strong wave action like this posed a significant risk and required the delicate skills of two excavators to move it higher up the beach.
Image: Colin Silvey
Source: Museum Victoria

Measuring a whale We took morphometric measurements prior to dissection which will add to what we currently know about the biology of the species.
Image: Colin Silvey
Source: Museum Victoria

Sarah Frith with dead whale Melbourne Zoo veterinarian Sarah Frith takes a stab at removing the eye.
Image: Colin Silvey
Source: Museum Victoria
 

Excavator working with whale on beach Tools of the trade: The excavator was invaluable when it came to removing the blubber layer and heavy lifting
Image: Colin Silvey
Source: Museum Victoria

Tools used to dissect whale More tools of the trade: hooks, knives and flensing tools are essential for the removal of blubber (flensing) and flesh from the skeleton.
Image: Colin Silvey
Source: Museum Victoria
 

Brendan Taylor working on the whale Preparator Brendan Taylor gets to work removing flesh and blubber.
Image: Rob Zugaro
Source: Museum Victoria
 

Burying whale bones By day two the carcass no longer resembled a whale. The bones were taken to a private location and buried to allow for bacteria and other flesh eating organisms to clean the skeleton. The cleaned bones will be retrieved in 12-18 months and added to the museum’s collection.
Image: Rob Zugaro
Source: Museum Victoria
 

The support provided by the Department of Environment and Primary Industries (DEPI), Parks Victoria, the local Indigenous representatives and the enthusiastic farmer who allowed for the storage of bones on his property, was second to none. Without their resources and assistance, the recovery could have not taken place.

Links:

Australian Marine Mammal Conservation Foundation

About this blog

Updates on what's happening at Melbourne Museum, the Immigration Museum, Scienceworks, the Royal Exhibition Building, and beyond.

Categories