Category Archives: Biodiversity

Hunting henriettas on Ruapuke Island – on the tail of New Zealand’s first mice

Few people are aware of Ruapuke Island. Guarding the eastern approaches to Foveaux Strait, the 1600 ha island is large enough to appear as a smudge of colour at the very bottom of TV3’s weather map. Yet the island’s low relief means that passengers on the Stewart Island ferry 20 km to the west barely notice it compared to the imposing bulks of Bluff Hill and Mt Anglem.

Henrietta Bay on the south coast of Ruapuke Island. The cannon is claimed to have come from the Elizabeth Henrietta. Image: Colin Miskelly

Henrietta Bay on the south coast of Ruapuke Island. The cannon is claimed to have come from the Elizabeth Henrietta. Image: Colin Miskelly

Ruapuke Island is privately-owned, mainly by descendants of the Kai Tahu chief Tuhawaiki. Most of the island is rough farmland (sheep and beef cattle), with a large patch of rimu / rata / kamahi / miro / kahikatea forest in the centre. Long sandy beaches separate granite and basalt headlands, with shallow lagoons lying behind several beaches.

Ruapuke was an important site for two of New Zealand’s earliest industries – the harvesting of fur seal skins and flax (harakeke) fibre. But the island has another more furtive claim to historical fame – or infamy. It was the first New Zealand site to be colonised by mice.

The brig Elizabeth Henrietta was engaged in the flax trade when it ran aground in Henrietta Bay on 25 February 1824. It was eventually refloated in August that year, but some time during its enforced stay, mice made it to shore. This was 6 years before the second recorded presence of mice in New Zealand, at the Bay of Islands in 1830. The residents of Ruapuke Island did not know what the strange creatures were, and reportedly referred to them as ‘henriettas’ after the ship they came from.

A mouse caught on Ruapuke Island. Image: Colin Miskelly

A mouse caught on Ruapuke Island. Image: Colin Miskelly

I was privileged to be invited to stay on Ruapuke Island at the tail-end of 2012. My hosts knew the significance of the island’s mice, and had been involved in the collection of tissue samples (i.e. mouse tail tips) for a genetic study that has confirmed that Ruapuke’s mice are from a different lineage to the rest of New Zealand’s mice. Yet during 188 years of mouse presence on Ruapuke Island, no specimens had reached Te Papa’s extensive collection of New Zealand rodents. Prepared with a selection of traps and baits, I spent 3 days trying to rectify this. It took some effort, as the mice were scarce (or wary), with two only caught in 27 corrected trap-nights. The main challenge was hiding the traps from inquisitive weka, which took 4 cheese baits, and would have taken any mice if I didn’t beat them to it.

A weka on Ruapuke Island. Image: Colin Miskelly

A weka on Ruapuke Island. Image: Colin Miskelly

Related blogs
Ruapuke Island – 1941 and 2012 – In the footsteps of Edgar Stead (Part 9)
Take that you dirty rat! – the unglamorous side of museum work

Oops-a-daisy! How many flowers do you see?

How many flowers do you see in the photo below?

Marlborough rock daisies (Pachystegia insignis). Photo credit: Lara Shepherd

Marlborough rock daisies (Pachystegia insignis). Photo credit: Lara Shepherd

Two is the obvious answer, but there are far more than two flowers in the picture. Each daisy ‘flower’ is actually made up of numerous tiny flowers, also called florets.

The Marlborough rock daisies pictured above have two types of florets. Around the outside are ray florets. Each ray floret has a single broad strap-like petal.

In the centre are the yellow disc florets, which have very reduced petals. The ray and disc florets grouped together look like the single flower found in many other flowering plants.

Marlborough rock daisy disc floret (top) and ray floret (bottom). Note the long petal on the ray floret. Photo credit: Leon Perrie

Marlborough rock daisy disc floret (top) and ray floret (bottom). Note the long petal on the ray floret. Photo credit: Leon Perrie

Such clusters of florets, called capitula (singularly, a capitulum), are typical of species in the daisy family. Other members of the daisy family include sunflowers, lawn daisies, lettuces and chrysanthemums.

Next time you find a daisy in the lawn or someone gives you a bunch of sunflowers, take a closer look.

Herbarium specimen preparation of succulent plants

Part of my role as Collection Manager at Te Papa herbarium is contributing to the further development of our dried plant collection. At the herbarium we are interested in collecting indigenous and naturalised New Zealand plant species for future scientific investigation and as an historical record.

One of our recent collection development projects focused on collecting as many species as possible in a specific coastal plant community, Hue te Taka in Wellington. One of the species growing here is the naturalised succulent, Cotyledon orbiculata. This species is a relatively common coastal plant, at certain localities, along the east coast of New Zealand.

Cotyledon orbiculata, Hue te Taka Peninsula. Photo: Antony Kusabs, Te Papa.

Cotyledon orbiculata, Hue te Taka Peninsula. Photo: Antony Kusabs, Te Papa.

To preserve their specific characteristics properly, succulents take a bit more thought and time to prepare as a herbarium specimen than typical flowering plant specimens. However, this is probably one of the easiest succulent species to prepare. While still fresh, I was able to longitudinally section the flower stem and scoop out the flesh. I then cut the leaves in half and, using a razor blade, skinned them so very little flesh remained. The specimen was then dried out completely in our cabinet drier.

Cotyledon orbiculata (pig's ear) leaf, with refuse of the skinning process in background. Photo: Antony Kusabs, Te Papa.

Cotyledon orbiculata (pig’s ear) leaf, with refuse of the skinning process in background. Photo: Antony Kusabs, Te Papa.

Other internet resources talk about preparing specimens in this way. Cross-sectioning some species (of cacti, for example)  may provide further detail or identification characteristics and using alcohol or boiling water to kill the cells, before pressing, enable it to dry completely and prevent it from growing in storage.

Older specimens of Cotyledon orbiculata at Te Papa have been dried conventionally, without any special preparation, with varying success. I think the leaves in particular can be preserved in a truer form if prepared in this ‘skinned’ way. I doubt that this species would be able to grow in storage.

Cotyledon orbiculata specimen. The clear bag will be folded and placed in the left hand packet. Photo: Jean-Claude Stahl, Te Papa

Cotyledon orbiculata specimen. The clear bag, with flower parts, will be folded and placed in the left hand packet. Photo: Jean-Claude Stahl, Te Papa.

The end result was a good herbarium specimen that was able to be easily mounted. Things to improve on: a few nicks can be seen in the leaves from getting too close to the leaf surface when skinning and the placement of lower right leaf should be lifted above the label. Spreading out one of the flowers enables a clear display of the flower parts. Similarly, flowers may be cut in half and the two halves pressed.

Behind the scenes at Deep NZ

Bizarre blobfish, toothy sharks and curious coral can all be found at Te Papa this summer!

Our host team got a sneak peek behind the scenes at the new Deep NZ exhibition before it opened to the public, with a fantastic talk given by Rick Webber, the curator of the exhibition. Full of weird and wonderful deep sea species, Deep NZ takes you on a journey under the deep ocean surrounding New Zealand.

Despite what you might think, this deep, dark world teems with life. You can see hagfish escaping sharks using a snotty defence, a scary-looking sea spider and an unusual anglerfish – trust me, you don’t want to come face-to-face with one of those.

Check out this video for a glimpse into the underwater world:

You can see more videos like this – with added narration – at the exhibition.

As hosts, we got the full rundown on the exhibition, so if you have any questions about it, please talk to one of us. If we don’t know the answer, or can’t find it out straight away, we can ask one of our experts who will get back to you.

The best thing to do is investigate the exhibition for yourself. Some of these strange sea creatures have to be seen to be believed.

Read more about the Deep NZ exhibition

DNA finds kiwi’s origins: Introducing Stewie

A number of biological specimens in Te Papa’s collection, particularly old specimens, lack information about when and where they were collected. This information may have been lost since the specimen was collected or was simply not recorded at the time.

However, all is not lost! Sometimes we can use DNA to determine where a specimen was collected.  We recently used DNA sequences to examine the provenance of a number of Te Papa’s unlabelled kiwi specimens.

One particularly stunning specimen we looked at is this articulated kiwi skeleton. 

Articulated kiwi skeleton from Te Papa's collection. Photo by Lara Shepherd.

Articulated kiwi skeleton from Te Papa’s collection. Photo by Lara Shepherd.

As I mentioned in an earlier blog on kiwi the bones of great spotted kiwi and the three species of brown species are very similar in size and shape and can’t be distinguished. Therefore, this kiwi skeleton could have potentially belonged to any of these four species.

To obtain bone material for our genetic analysis we drilled a small hole underneath the pelvis. Our aim was to minimize the visible damage to the skeleton.

Close-up of the hole we drilled in the pelvis to obtain bone for DNA analysis. Photo by Lara Shepherd.

Close-up of the hole we drilled in the pelvis to obtain bone for DNA analysis. Photo by Lara Shepherd.

 We compared the specimen’s DNA sequence to sequences previously obtained from kiwi from known locations around New Zealand.

The results showed that this kiwi skeleton is a Tokoeka (also known as Southern brown kiwi) from Stewart Island.  This result increases the scientific value of this skeleton and is particularly exciting because there aren’t many kiwi from Stewart Island in museum collections.

Link to our study.

Jovellana sinclairii flowering in Bush City

Te Papa’s Bush City is currently graced by a good display of sprays of the white, bell-like flowers of Jovellana sinclairii. If you’re visiting, you can see them beside the waterfall, on the lower track.

Jovellana sinclairii BushCity 3 reduced

Flowers of Jovellana sinclairii, in Te Papa’s Bush City. Photo Leon Perrie. © Te Papa.

Flowers of Jovellana sinclairii, in Te Papa’s Bush City. Photo Leon Perrie. © Te Papa.

Jovellana sinclairii in Te Papa’s Bush City. Photo Leon Perrie. © Te Papa.

Jovellana sinclairii BushCity 4 reduced

Inside a flower of Jovellana sinclairii, in Te Papa’s Bush City. Photo Leon Perrie. © Te Papa.

Jovellana sinclairii is not a common plant in the wild. You’re most likely to find this large herb beside streams and other wet places. But it makes a good garden plant, in damp, shaded areas.

There is one other species of Jovellana in New Zealand. The group of plants to which they belong (the Calceolariaceae) otherwise occurs in South America.

More on New Zealand Jovellana.

A recent study using DNA to investigate the relationships of these plants concluded that the ancestor of the New Zealand species had arrived from South America within the last few million years.

Abstract of the paper investigating Jovellana relationships.

More on some of the plants in Bush City.

“We are the same-same.” Rapa Nui visitors to Te Papa Tongarewa

This past Saturday (1 December 2012), we had a special request from a group of visitors who were going to be in Wellington for a weekend. They wished to come in and talk to some of the curators and see the collection. This is relatively common but what was slightly unusual about the group was that they had come from Rapa Nui, otherwise known as Easter Island.

http://www.easterislandtraveling.com/easter-island/history/

Map of the Pacific. Image reproduced courtesy of Easter Island Travelling

http://worldheritagesites.tumblr.com/post/4064583391/hillside-moai-rapa-nui-national-park-chile

Image of the famous Moai. Image reproduced courtesy of World Heritage Sites, on Tumblr.

Rapa Nui is in the furthest southeastern part of the Pacific, one of the most isolated of the islands which make up the Pacific Islands. It is home to the magnificent moai statues and part of Polynesia. Rapa Nui is called ‘Te Pito o te Henua’ (the bellybutton of the world), is a territory of Chile and home to nearly 6, 000 people. On the island, Spanish and Rapa Nui te reo is spoken. Rapa Nui reo is very similar to Te Reo Māori and speakers of both languages are able to communicate.

The request to visit came from Bronwen Golder, Director the Pew Environment Group Kermadec Initiative. The Pew Environment Group has committed itself to securing Government protection of the Kermadecs and as part of that commitment; it has sponsored the Kermadec show at City Gallery here in Wellington, and the Deep Sea Biology Symposium, held at Te Papa last week.

As part of the Pew conservation work, they are looking to develop a relationship with the indigenous people of Rapa Nui, where the Pew Group have identified a proposed reserve. So they sponsored a visit by five Rapa Nui tangata whenua with the intention to bring these representatives to New Zealand for a quick reconnaissance visit, in preparation for a larger group visit next year.

I have a special affection for requests from visitors from the Pacific. Many of the taonga that we care for in the museum have ancestral roots and resonances with many of the island nations throughout the Pacific. So when we have visitors from the Pacific to the Māori collection, I get very excited to hear their reflections and observations of the taonga Māori.

My own travels to two Pacific Festivals of the Arts (one in American Samoa in 2004, and the most recent in the Solomon Islands, 2012), I have been lucky to see the Rapa Nui island represent itself at the festival with dancers and carvers.

Rapa Nui dancer, my image from the 2012 Pacific Festival of Arts, Honiara

Rapa Nui dancer, at the 11th Festival of Pacific Arts, Solomon Islands. Photographer Puawai Cairns, copyright Te Papa Tongarewa, 2012.

the Rapa Nui people, during a parade at the Festival of the Arts

Rapa Nui carvings and artists, at the 11th Festival of Pacific Arts, Solomon Islands. Photographer Puawai Cairns, copyright Te Papa Tongarewa, 2012.

For some reason, a ripple of excitement always went through the crowds when Rapa Nui presented itself in any of the parades. Whether it is the exotic, beautifully sensual nature of the dancing, the beauty of their dancers, or just the mystery of the people and culture of Rapa Nui, it is difficult to tell. In any case, Rapa Nui always holds some allure.

But like many of the Pacific Island nations, their recent history has been fraught with protests over land and recognition of indigenous rights, and great efforts to protect, and revitalise their language and culture.

The visiting group and the curator, in front of Te Hono ki Hawaiki (Te Papa's wharenui). Photographer Dr Susan Waugh, copyright Te Papa Tongarewa, 2012.

The visiting group and the curator, in front of Te Hono ki Hawaiki (Te Papa’s wharenui). Photographer Dr Susan Waugh, copyright Te Papa Tongarewa, 2012.

The group:
Bronwen Golder (not pictured) – Director the Pew Environment Group Kermadec Initiative
Simon (Kuchy) Pakarati (left) – a Rapa Nui fisherman and Pew Environment Group leader on the island.
Alberto Hotus (2nd from the left) – Chair of the Council of Ancients on Rapa Nui. He was described by the group as a ‘Walking Library’ of Rapa Nui lore. He was the elder of the group and was referred to as Koro. He last visited New Zealand in 1976, when he came to the Pacific Festival of Arts in Rotorua.
Pedro Tepano (2nd from the right) –member of the Rapa Nui Council, who is responsible for revitalising Polynesian waka racing on the island.
Ernesto Escobar (right) – the Director of the Pew Global Ocean Legacy project in for Rapa Nui and Bronwen’s Chilean counterpart.

The Visit
A group of Te Papa staff gathered and greeted the visitors when they arrived. We had to speak through Ernesto, who translated from English to Spanish for us. I spoke Māori and we all managed to make ourselves understood. But thanks to Ernesto’s indefatigable efforts, he allowed the conversations to flow quite easily.

Te Papa has a few pieces in the collection with an association to Rapa Nui/Easter Island but when they began in the Pacific collection with Grace Hutton, Collection Manager Pacific, they were more interested in seeing material from other cultures. After the Pacific Collection, Mark Sykes (Maori Collection Manager) and I, took them into the Māori collection where we spent several hours going through the taonga Māori.

Through our shared conversations and exploration of the museum, I found it remarkable how many commonalities there were between us. The Polynesian culture – even though spread across thousands of miles – has maintained a strong presence throughout the many different islands. I showed them examples of taonga, such as the tokotoko, and they recognised them immediately – having the same taonga in Rapa Nui – with the same name and same function. In fact, the phrase – “same, same” kept arising the whole time they visited. Koro and I would discuss a story or a taonga and inevitably end up saying “same-same” and then smile at each other in recognition of the ancestral connections which still endure between our two islands.

We had similar stories, humour, and even body language. When discussing some of the bleaker aspects of both countries’ encounter histories; for instance, imperialism, cultural erosion, efforts to revitalise customs and practices – these were still points where we could share common experiences and struggles. It was amusing, poignant and endearing.

Rapa Nui 006

Pedro’s pukana. Photographer Puawai Cairns, copyright Te Papa Tongarewa, 2012.

Two places they took particular interest in, were the two whare in Te Papa. Te Hono ki Hawaiiki (pictured above in Pedro’s pukana picture) and the magnificent Rongowhakaata whare Te Hau ki Turanga. When I described the conflicted acquisition history of Te Hau ki Turanga and its negotiated return to Rongowhakaata, as part of the tribe’s Treaty settlement, there were nods of empathy and agreement that the whare’s return to its people was right.

Once they left the Cable Street site, Dr Susan Waugh then took them to the Natural Environment storage at the top of Tory Street, where they spent a further two hours looking at specimens in Te Papa’s enormous NE collection.

The Reo
Before their visit, my curator colleague and friend Reuben Friend from the City Gallery, sent me a list of Rapa Nui words that he thought I could intersperse throughout my conversations. I’ve listed them here because they reveal just how similar we truly are (I haven’t put in the macrons). [n.b. I am by no means a language expert, so consider this a rough guide as opposed to an exact linguistic translation.]

Rapa Nui word Māori word English word
wananga korero to talk
ite mohio know
ina kaore no
Maururu (can use kia ora) thanks
hare komo whare paku toilet
rohirohi ngenge tired
Petipeti! ka pai! All is well!
hakaora Whakaora (be well) see ya

These words came in pretty useful during the day, so many thanks to Reuben. If you want to listen to the sound of Rapa Nui reo, you can listen if you follow this link.

I hugely enjoyed the visit by our Rapa Nui whanaunga (relatives) and do hope they come back to Aotearoa again. I found it a moving experience, listening to their stories, their struggles to bring their own culture back from the brink and to be given the recognition that many indigenous peoples struggle for. I applaud the Pew Environment Group for having the foresight in supporting the people of Rapa Nui to be involved with their efforts to raise awareness of the fragility of the environment and the unique species found within the Kermadecs and around Rapa Nui.

In 2010, one of our staff wrote this intriguing blog about the toromiro tree, a relative species to the kowhai here in Aotearoa, used for Rapa Nui carvings. You’ll see that Aotearoa and Rapa Nui share more than cultural similarities.

I look forward to their next visit!
Maururu / Kia ora!

UPDATE: as a wonderful coincidence, this week two ocean-going waka from Aotearoa – using traditional navigational techniques and after four months voyaging – have arrived in Rapa Nui. You can read about it here: The Waka Tapu Project.

Me and Koro (Alberto)

Koro (Alberto) and me. Photographer Dr Susan Waugh, copyright Te Papa Tongarewa, 2012.

Wellington Botanical Society Bulletin 2012

The botanically-inclined may find something of interest in the just-published Wellington Botanical Society Bulletin. Number 54 includes:

  • the uses of some common native plants.
  • notes on the propagation of native plants.
  • accounts of the diatoms and bryophytes recorded during the 2011 bioblitz on Mana Island.
  • the use of names in botany.
  • detailed accounts of the Owhiro Stream area and Makara Foreshore Reserve.
Mänuka, Leptospermum scoparium. One of many native plants put to many uses. Captain Cook used it with rimu to make beer.

Mänuka, Leptospermum scoparium. One of many native plants put to many uses. Captain Cook used it with rimu to make beer.

The Bulletin is distributed free to the Society’s members, or available for separate purchase.

Website of the Wellington Botanical Society.

Articles from earlier numbers are freely downloadable from this website.

Help with floating fern

I’ve recently learnt that the introduced Azolla pinnata (ferny azolla) has been found in the Wellington region. I’m interested in its distribution and would be grateful for help in looking for more. Azolla plants are fairly easy to spot: look for a red plant covering still bodies of water.

Azolla plants often become red in full sunlight, and they can become so abundant that they carpet ponds, drains, and other still bodies of water. This is Azolla rubra in a pond on Mana Island, Wellington. Photo Leon Perrie. © Te Papa.

Azolla are ferns, believe it or not! They are free floating, and while individual plants are only a few centimetres across, they can proliferate in good conditions to ‘carpet’ large areas of water surfaces.

There are two species in New Zealand: the native Azolla rubra (Pacific azolla, previously known as Azolla filiculoides); and the exotic Azolla pinnata, which is an introduction from the tropics.

Azolla pinnata has largely replaced the native Azolla rubra in the northern North Island. It is therefore a concern that A. pinnata was found near Waikanae in recent weeks, after being found near Whanganui a few years ago. It seems it is continuing to spread south.

The introduced Azolla pinnata has very regular branching. Plants can be red or green depending on whether they are in the open or shade, respectively. The green ovals are Lemna duckweed (a flowering plant). Photo Leon Perrie. © Leon Perrie.

The branching of the native Azolla rubra is irregular. Photo Leon Perrie. © Te Papa.

Can you help please?

I would like to better document the distribution of the two Azolla species in New Zealand, and particularly the spread of the introduced A. pinnata. The southern North Island is the primary interest, but anything that adds to what we already know would be useful (see the link to the map below).

Map of Te Papa’s collections of Azolla.

If you see Azolla (either species), you could post a comment or send me an email. If you have landowner permission, you could make a collection for possible addition to Te Papa’s specimens: post me 20-30 plants enclosed within a watertight plastic bag, with locality details, and your contact details. My address is: Leon Perrie, Te Papa, PO Box 467, Wellington 6011.

Thanks very much.

Te Papa Researcher awarded a Rutherford Fellowship

Dr Lara Shepherd, who’s been working with us on genetics research since January 2012 has just been awarded a prestigious Rutherford Fellowship.

Dr Lara Shepherd at the Garden of the Sleeping Giant, Nadi, Fiji. Photo: Leon Perrie. © Leon Perrie, Wellington

Dr Lara Shepherd at the Garden of the Sleeping Giant, Nadi, Fiji. Photo: Leon Perrie. © Leon Perrie, Wellington

Only 10 fellowships are awarded each year, with a total of $8 m granted. The fellowships are awarded on the basis of the excellence of the candidates work as well as the research topic they propose.

Lara’s project is to explore the influence of human activity on evolutionary processes for New Zealand species. This includes further work on plants brought by Maori to New Zealand during early colonisation and the changes in these plants since that time. She’ll also examine how data on species changes can be used to better manage conservation of species and prevent population losses.

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