Category Archives: Crustacea

Amphipod-Thursday. WoRMS – (all) about amphipods

It is a sad fact, but a fact nonetheless. Most biologists are not taxonomists. Even so – the work many biologists do is based on knowing the species studied, and knowing the correct name is part of that important knowledge.

Screenshot from WoRMS-search: Andaniopsis lupus

Screenshot from WoRMS-search: Andaniopsis lupus

But how do we know what names are valid, and what species have been formally described within a group? Taxonomic revisions tend to have name-changes as a result, and new species are described all the time – for amphipods an average of 140 species new to science are described yearly…

Screenshot from World Amphipoda Database

Screenshot from World Amphipoda Database

This is where databases will be your best friend! For marine species, the World Record of Marine Species, WoRMS, database is used widely, with more than 200 000 visits every month. Here you can find not only current accepted names, but also information about synonymised names, taxonomic literature, and for some species information about distribution, ecological traits and links to other resources. The data have all been checked and edited by a world-wide team of taxonomic and thematic editors – all responsible for their special groups of organisms.


IMG_9037This week, 22 of the 34 taxonomic editors of the World Amphipoda Database, feeding WoRMS with all Amphipod-related information, gathered at the Flanders Marine Institute in Oostende, Belgium to learn about how to best edit the information about Amphipods. It was two days full of information about the database, but also of hands-on training and with the help of the nice people in the Data Management Team of WoRMS, we managed to get quite a lot of information added and edited on the database. Needless to say, with more than 9000 amphipod species accepted (and several of them with earlier names or alternate representations), we have not completely finished yet. The work on editing a database is continuous – and we have plans for adding more info for each species, including type-information, ecological information and links to identification keys.


The second best thing about going to workshops (the first being all the exciting new things we learn), is that we get to spend time with colleagues from far away. The people working on amphipods are in many ways my extended family – this is at least how it feels whenever we meet. News about both amphipods and life in general are exchanged, possible new projects are planned, and friendships continue to be reinforced over cups of coffee, early breakfasts and late dinners. And every time we leave each other, there is a hope that our next meeting might not be too far away.  My colleagues from Poland call this “the Amphipoda way of life”  – and this friendly, collaborate life is a good life to have as a researcher.

AHT_8164

Participants at the workshop. Photo: AHS Tandberg (with help from ? at VLIZ)

Anne Helene


Citations:

Horton, T.; Lowry, J.; De Broyer, C.; Bellan-Santini, D.; Coleman, C. O.; Daneliya, M.; Dauvin, J-C.; Fišer, C.; Gasca, R.; Grabowski, M.; Guerra-García, J. M.; Hendrycks, E.; Holsinger, J.; Hughes, L.; Jaume, D.; Jazdzewski, K.; Just, J.; Kamaltynov, R. M.; Kim, Y.-H.; King, R.; Krapp-Schickel, T.; LeCroy, S.; Lörz, A.-N.; Senna, A. R.; Serejo, C.; Sket, B.; Tandberg, A.H.; Thomas, J.; Thurston, M.; Vader, W.; Väinölä, R.; Vonk, R.; White, K.; Zeidler, W. (2016) World Amphipoda Database. Accessed at http://www.marinespecies.org/amphipoda on 2016-04-07

WoRMS-info on workshop: http://www.marinespecies.org/news.php?p=show&id=4531

Thursday Amphipod — Norwegian Marine Amphipoda

Amphipoda is an order of mainly small crustaceans living in the ocean, in lakes and rivers, in caves and in moist soil. They can be found worldwide, and the last count in the marine speciesdatabase WoRMS gives about 9 800 valid species. Most of the amphipod species are marine, with again most species connected to the sea-floor (benthic) – even if one of the suborders entirely lives in the watercolumn (pelagic).

The Norwegian Species-name List includes 561 amphipods in Norway, and the most recent listing of amphipods in the North-East Atlantic includes 850 species (Vader, 2007). How many amphipod species that do live in Norwegian waters is probably somewhere between these two numbers.

A collection of Norwegian Amphipoda. Photo: Katrine Kongshavn

A collection of Norwegian Amphipoda. Photo: Katrine Kongshavn

The Norwegian Species Initiative funded project “Norwegian Marine Amphipoda” (NorAmph) starting these days at the Universitymuseum has as one of its objectives to produce a better overview of what species are present in Norwegian marine waters. Utilising material from large projects such as MAREANO and GeoBio, from field-cruises with UNIS and not least the wonderful wealth of the Natural History Collections of the Universitymuseum of Bergen we hope to be able to give an answer to the question.

When a new species of any animal is described, it is mostly done on the basis of its morphology (how it looks). Lately we also add information about a small and species-specific part of the DNA, but for most species this is informations we don´t have yet. The project Barcode of Life aims to map this small part of every species´ DNA  as a tool for later identification – like the barcodes that are used in shops. Norway is participating in this project through the national node NorBOL – and another of the objectives of the NorAmph project is to try to DNA-barcode as many of the norwegian marine amphipod-species as possible. You can read more about the NorBOL work at our invertebrate lab here at her museum here.

One very important part of the NorAmph project is to present the amphipods to all you not working on this fascinating group. Maybe you played with sandhoppers during a beach-holiday, or hunted for sideswimmers under the cobbles on a rocky shore? You might even have been flyfishing with a “Gammarus”-fly? Follow our “TangloppeTorsdag” (in Norwegian) or ThursdayAmphipod (in English) tag. Everything we post under this project will be collected under the category “NorAmph”.

Anne Helene

Literature:
Vader, W. 2007 A checklist of the Marine Amphipoda of the North-East Atlantic and Norwegian Arctic. Published on Tromsø Amphipod Webpage

Door #19: The amphipods with the pointed hoods

Unravelling the mysteries of Amphipods

Unravelling the mysteries of Amphipods

This last week Ania and Anne Helene have been filling the lab with details about antennae, epimeral plates and hairs (setae) on all appendages imaginable and unimaginable. The first dive into the west-African amphipods has been made, and we chose to focus on a family that is easily distinguished from the rest of the amphipoda: the Phoxocephalidae.

This family was first described by G.O. Sars in 1891, and in the northern Atlantic it is a friendly group to examine – it does not have too many species. On a world-basis, however, there are 369 species of Phoxocephalide described, within 80 genera (as of dec 14 2015). The whole groups is easily recognized by their “pointed hoods” – the head is drawn forwards just like a hood that is pulled as far to the front as it goes.

 

Ania has much of her previous experience from the Antarctic and Anne Helene has worked in the Arctic, so west-African waters seemed a good place to meet – if not literally then thematically. Being physically in the same lab is probably the best way to collaborate on examining small animals, and we had a week of long and happy days in the lab.

A Basuto stimpsoni from Guinea Bissau. Photo A.H. Tandberg

A Basuto stimpsoni from Guinea Bissau. Photo A.H. Tandberg

Why did we think the Phoxocephalidae would be a good starting point for examining the amphipod-fauna of the West-African waters? There were moments during the last week we asked ourselves this question. There are some reasons, though. To be able to identify species of amphipods you normally have to examine a collection of characters such as the antennae, sections of the different legs (Amphipods do have a lot of legs!) and the different sideplates (for example the epimeral plates).

In difference with many other amphipod groups the Phoxocephalids do not have a lot of appendages that are sticking far out of the main body, so there are not so many pieces that break off ethanol-preserved specimens – and that gives us a bit easier job.

But there are not many studies of the smaller crustaceans from these waters previously, so we were not expecting to be able to put names on much of what we were looking at. This prediction proved true – we have found one already named species (Basuto stimpsoni Stebbing, 1908) in all our samples. In addition to this we have found what we think are 27 other species – but we do not have a name for most of them. For many we don´t even have a genus name.

How will we continue with this group? The first step is to see if our 28 putative species really are different – for this we will first map their DNA barcode (COI). Depending on what results this gives us, we will be able to see how many new species we end up with.

There is definitely more to come from this study, and we promise to write about it when we know more (that will, however, not be in this advent calendar)…

-Ania and Anne Helene

Door #17: A marriage of art and science

What does an organism really look like – and how does that organism make us feel, what thought does it inspire, and what beauty is hidden within their complex structures?

Some of Pippip Ferner ́s studies from the cruise onboard G.O. Sars. (Small paintings  20x20cm in acrylic paint, ink and pencil) ©

Some of Pippip Ferner ́s studies from the cruise onboard G.O. Sars. (Small paintings 20x20cm in acrylic paint, ink and pencil) © Pippip Ferner

Anne Helene and Pippip look at the same organsims, but from different perspectives. Anne Helene works as a scientist at the Invertebrate Collections and Pippip Ferner is an artist who is very inspired by marine biology and marine organisms in her work.

As biologists we have the privilege to see many of the wonders of nature up close as part of our job. But how can we share that with the rest of you – all of us who didn´t go to that cruise, or don´t study that exact organism?

© Pippip Ferner

© Pippip Ferner

Historically, artists used to be part of most large projects – as documentarists. This tradition still stands, but now it is often the scientists that make drawings of what we see, and often more importantly: what details are the important ones for the scientific studies. Where does the pure artistic (non-documentary) work fit now?

 

 

 

Pippip´s long interest in marine biology has lead to her participation on a scientific cruise with MAREANO, where she met Anne Helene. Being on a cruise and observing animals live, talking with the scientists and see (part of?) what they see lead to a series of sketches that resulted in many paintings, sculptures and prints.

Amphipods by Pippip Ferner. Ink on paper. © Pippip Ferner Want to see more?  www.pippip.no

Amphipods by Pippip Ferner. Ink on paper. © Pippip Ferner Want to see more?
www.pippip.no

She wants to look at the marine biology from a non-scientific view point, to look at details or whole organisms and see new shapes and explore textures. Where the scientist has to stick to the strict morphology of the organism, Pippip can look at what is not seen.

Ferner had no idea in advance that an  amphipod had personality...  © Pippip Ferner

Ferner had no idea in advance that an
amphipod had personality… © Pippip Ferner

Here are some of Pippips examinations of amphipods – and some photos and scientific drawings of some amphipods that might have been inspiring her.  In Pippips own words, she aims to “ contrast beauty against ugliness, weak against strong, small againt large.” This might make it both easy and difficult to recognise her objects, and her pictures might be both simple and complex at the same time.

Much of our scientific work is to observe minute details in our chosen organisms. Looking at amphipods scientifically means looking for serrations along curved ridges, counting small hairs (seta) and seeing if they have split ends, looking at shapes of mouthparts and lengths of feet and antennae, and documenting this with photos and drawings.

Example of scientific drawing of  mouthparts.  Exitomelita sigynae Tandberg, Rapp et al, 2011

Example of scientific drawing of
mouthparts. Exitomelita sigynae
Tandberg, Rapp et al, 2011

Having the luck and joy of seeing these same organisms represented artistically can give an added dimension to our work. It also gives the possibility for all the rest of you to get another gate to come in contact with our organisms through.

Maybe taking both views into account will help us learn and understand even more? The scientific and artistic views can supplement each other, and have been doing so already for generations.

Metopa boecki  (live) Photo:  Anne Helene Tandberg

Metopa boecki (live) Photo: Anne Helene Tandberg

The collaboration between Pippip and Anne Helene continues – yesterday Pippip visited the Invertebrate Lab, to get new ideas and inspirations for further artistic examinations… We are sure more beautiful, inspiring and maybe provoking representations of marine life will continue to come from this collaboration. Be sure to follow us!

– Anne Helene and Pippip

Door #7: Shrimp and salad

Hippolyte varians Leach, 1814 in sea lettuce, Ulva lactuca

Hippolyte varians Leach, 1814 in sea lettuce, Ulva lactuca

This small shrimp can be found on the shore in small ponds at low tide. The species was recorded from Western Norway already in the early 19 hundreds by research curators in Bergens Museum (Appellöf, 1906; Grieg, 1927). Interestingly, as also observed by Appellöf (1906:page 124) individuals of this the species appear in many contrasting colour variants due to the ability of the the body to mimic the colours in the environment. The Norwegian name of Hippolyte varians is «sjøgressreke», which refers to its association with sea grass meadows (Zostera marina), in which a green body colour would seem to be an appropriate camouflage appearance. The specimen on this picture was caught in the littoral at the island Turøy amongst sea lettuce, Ulva lactuca. We see that there is a good colour match between the shrimp and the lettuce.

However, reddish, pink, brownish, black or even white colours have been are observed in other environments and it seems that at night time the shrimp may take a rest from the camouflage by attaining a transparent whitish blue appearance as shown by Moen’s picture here.

Knowledge about the distribution and biology of Hippolyte varians is summarised by C. d’Udekem d’Acoz. 

References

Appellöf, A. 1906. Die Dekapoden Crustaceen. Meeresfauna von Bergen 2(3): 113-238.

Grieg, J.A. 1927. Decapoda Crustacea from the west coast of Norway and the North Atlantic. Bergens Museums Aarbok 7:1-53.

Udekem d’Acoz, C. (1996). The genus Hippolyte Leach, 1814 (Crustacea: Decapoda: Caridea: Hippolytidae) in the east Atlantic Ocean and the Mediterranean Sea, with a checklist of all species in the genus. Zoologische Verhandelingen (Leiden) 303: 1-133.

-Endre

International Conference on Crustacea in Frankfurt

Copy of GoetheUnivFrankfurt

The Casino building of the Goethe University

Almost 300 researchers from many nations were convened last week at the beautiful Campus Westend of the Goethe–University in Frankfurt for the 8th International Crustacean Congress (ICC-8). Many interesting talks and high quality posters were presented over six days. A special workshop on DNA-identification and barcoding filled the auditorium to the the edge and left many attendants standing through the session. EW gave a 15 minutes talk on results from our barcoding of decapods and stomatopods. He particularly emphasized how barcoding can reveal discordant species identifications among different labs and research environments and pinpoint the need for reidentification and / or taxonomic revision of species.ICC-8_presentation

Kenneth Meland (BIO, UiB) presented results from phylogenetic analyses of the ancient group Lophogastrida.  Separate analyses of morphological characters and DNA from four genes show surprisingly congruent results and have given us a new understanding of relations among  the  families of the group. Meland cooperates with EW and Stefan Richter (Univ. Rostock) in this  project.

ICC8_Lophogastrida