Category Archives: Student Projects

Fieldwork at Sletvik Fieldstation!

From Monday 12th of October till Monday the 19th a bunch of different projects funded by the Norwegian taxonomy initiative travelled up North together to meet up with researchers from NTNU in the NTNU Sletvik field station.

Front of Sletvik fieldstation main building, photo credits Nina T. Mikkelsen

Sletvik fieldstation is NTNU owned and is a short drive from Trondheim. The Germans built the station during the Second World War. Ever since it has been used as a town hall, a school and a shop. In 1976 the NTNU University took over the building and transformed it into a field station, which it remains ever since. The entire station contains of two buildings that has room for a total of 75 people (Before Corona). The main building has a kitchen, dining and living room plus a large teaching laboratory, a multilab and two seawater laboratories. Besides it has bedrooms, sauna, laundry rooms, and showers, fully equipped! The barracks have additional bedrooms and showers, all in all, plenty of space.

 

From the Natural History Museum of Bergen, 5 current running projects would use the NTNU fieldstation facilities for a week in order to work on both fixed as well as fresh material. Besides HYPCOP (follow @planetcopepod), we had Hardbunnsfauna (Norwegian rocky shore invertebrates @hardbunnsfauna), Norhydro (Norwegian Hydrozoa), Norchitons (Norwegian chitons @norchitons) and NorAmph2 (Norwegian amphipods) joining the fieldwork up North!

Lot of material needed to be sorted, photo credit @hardbunnsfauna / Katrine Kongshavn

 

At the Sletvik fieldstation, a lot of material from previous fieldwork was waiting for us to be sorted.

For HYPCOP we wanted to focus mostly on fresh material, as this was a new location for the project. And not just new, it was also interesting as we have never been able to sample this far north before.  Almost every day we tried to sample fresh material from different locations around the fieldstation

Cessa and Francisca on the hunt for copepods, photo credits Katrine Kongshavn)

On top of that we aimed to sample from different habitats. From very shallow heavy current tidal flows, rocky shores, steep walls, almost closed marine lakes (pollen called in Norwegian) and last but not least, sea grass meadows

Different habitats give different flora and invertebrate fauna, photo credits Nina T. Mikkelsen

Sampling we did by either dragging a small plankton net trough the benthic fauna or the most efficient way, going snorkeling with a net bag

Ready for some snorkeling with Cessa and August, photo credits Torkild Bakken

Benthic copepod species tend to cling on algae and other debris from the bottom, so it is a matter of collecting and see in the laboratory whether we caught some copepods, which, hardly ever fails, because copepods are everywhere!

Copepods are difficult to identify due to their small nature, differences between males, females and juveniles’ and the high abundance of different species. Therefore, we rely heavily on genetic barcoding in order to speed up the process of species identification. So, after collecting fresh material, we would make pictures of live specimens to document their unique colors, and then proceed to fixate them for DNA analyses.

Yet unidentified copepod species with beautiful red color, photo credits Cessa Rauch

Winter Wonderland! Photo credits Cessa Rauch

The other projects had a similar workflow so you can imagine, with the little time we got, the Sletvik fieldstation turned into a busy beehive! One week later we already had to say goodbye to the amazing fieldstation, and after a long travel back (even with some snow in the mountains), we finally arrived back in Bergen where unmistakably our work of sorting, documentation and barcoding samples continued!

If you are interested to follow the projects activity, we have social media presence on Twitter (@planetcopepod, @hardbunnsfauna, @norchitons), Instagram (@planetcopepod, @hardbunnsfauna, @norchitons) and Facebook (/planetcopepod /HydrozoanScience).

 

-Cessa

Sea slug day 2020; Jorunna in the spotlight

Today we celebrate Sea Slug Day! ✨

The day coincides with the birthday of Terry Gosliner, who has discovered one-third of all known sea slug species (more than a 1000!). Here’s a link to how October 29th became #SeaSlugDay.

And what better way to celebrate it than introducing a new species to the world. Today it will all be about the Jorunna tomentosa species complex that our master student Jenny Neuhaus studied for the last two years.

Jorunna tomentosa, picture Cessa Rauch

Jorunna tomentosa is known to occur in a wide variety of colour patterns, which tossed up the question whether we are actually looking at a single species at all, or maybe dealing with cryptic lineages.

The colour diversity of Jorunna tomentosa, picture by Anders Schouw, Nils Aukan, Cessa Rauch, Manuel A. E. Malaquias

Jenny compared specimens from Norway, Ireland, Spain, Azores and South Africa, both genetically as well as anatomically. She used different gene markers like COI, 16S & H3 to check how these morphotypes compare with each other and evaluate the meaning of genetic distances. But she also did an elaborate morpho-anatomical study to look for differences between these colour patterns. Together with Dr. Marta Pola in Madrid, they dissected the different J. tomentosa specimens and looked at parts of the digestive (radula & labial cuticles) and the reproductive systems. These are all key to help unraveling putative different species and characterize them.

About Jorunna tomentosa

Jorunna tomentosa has an oval-elongate body shape with different colours varying from grey-white to cream-yellow and pale orange. They can reach a size up to 55 mm and occur at depths from a few meters down to more than 400m. they feed on sponges of the species Halichondria panicea, Haliclona oculata and Haliclona cinerea. J. tomentosa can be found from Finnmark in northern Norway, southwards along the European Atlantic coastline, the British Isles, the French coast, Iberian Peninsula, Mediterranean Sea up to Turkey, and the Azores and Canary Islands,. Besides the species has even been recorded from South Africa.

Before Jenny studied J. tomentosa, the various colour morphs were regarded as part of the natural variation of the species. By combining molecular phylogenetics with morpho-anatomical characters Jenny investigated the taxonomic status of the different colour morphs of J. tomentosa.

Jorunna sp. nov.?

Jenny sequenced 78 specimens of which 60 where successful for using in the final phylogenetic analyses. Her results supported a new Jorunna species, and a possible case of incipient speciation in J. tomentosa with two genetic lineages morphologically undistinguishable.

From left to right Jorunna spec. nov. Jorunna tomentosa lineage A and down Jorunna tomentosa lineage B

The new Jorunna species was based on material collected from Norway (Kristiansund, Frøya & the North Sea). Jorunna spec. nov. has a distinct colour pattern of cream-yellow with dark small dots (plus, as important; major differences in the radula and reproductive system).

Jorunna spec. nov.

It has been our pleasure to have Jenny here as a student, and she has done excellent work. Last year she won best student poster award last year with her work on Jorunna tomentosa at the World Congress of Malacology in California, USA. Most recently, Jenny defended her thesis on October 26 and passed with an A for her great work – congratulations from all of us at the Museum!

-Cessa Rauch

Sea slugs of Norway Instagram: @seaslugsofnorway

Sea slugs of Norway Facebook: www.facebook.com/seaslugsofnorway

Sea slugs of Southern Norway; farewell but not goodbye!

A note from the Norwegian Taxonomy Initiative project (artsprosjekt) “Sea Slugs of Southern Norway” (project home page), which ran from 2018 to the end of April 2020.

Dear all,

The Sea slugs of Southern Norway project reached its terminus at the end of April, with sending the last reports of our collection and research efforts to Artsdatabanken (the Norwegian Biodiversity Information Centre).

What we have been able to build up these last two years is of immense importance for the scientific collections of the Natural History Museum of Bergen (University of Bergen)  and for (Norwegian) biodiversity research.

Sea slugs of Southern Norway managed to collect over 1000 lots covering 93 different sea slug species, of which 19 are new for Norway and a few new to science (we are working on it!).

Below are photos of the species that were collected at different sampling events.  The photos are made either by the researchers associated with the project, or by the amazing team of citizen scientists.

Look at these beauties!

This would absolutely not have been possible without the special effort of our knowledgeable citizen scientists, and we would like to use this opportunity to name a few that were extraordinarily productive during the last years and provided the project and the Museum with valuable samples; Nils Aukan, Roy Dahl, Viktor Grøtan, Heine Jensen, Tine Kinn Kvamme, Runa Lutnæs, Ole Christian Meldahl, Jenny Neuhaus, Bjørnar Nygård, Anders Schouw, Erling Svensen, Cecilie Sørensen, Mona Susanne Tetlie, Anne Mari with Ottesen, Mandal Dykkerklub, Hemne Dykkerklubb, Slettaa Dykkerklubb, SUB-Studentes Undervannsklubb Bergen, Larvik Dykkerklubb, Sandefjord Dykkerklubb, and all the others that made big and small contributions.

A big thank-you to all contributors!

Would you like to know more about the citizen scientists part of the project? Check out this paper (starts on page 23) by Cessa and Manuel: Sea Slugs of Southern Norway: an example of citizens contributing to science.

Mandal team

One of the core components of the projects success was our outreach effort on all kind of social media platforms. During these two years these platforms got much more traffic than we initially thought; apparently we have many Norwegian sea slug fans, within and outside of Norway!

Therefore we decided to continue with our outreach efforts to keep everyone engaged and up to date about these wonderful animals in our ocean backyard, but with some minor adjustments. Some of you might have already noticed a few changes during the last days on the Facebook page  and our Instagram account. From today onward, the social media pages will cover sea slugs of all of Norway, and is now named accordingly. We also welcome a new admin to the facebook group: Torkild Bakken of NTNU University Museum. Welcome Torkild, the more expertise the better, so we are very happy to have you onboard!

We encourage everyone in this community to continue to be active and share your findings and knowledge with other.

Let’s carry on enjoying the wonderful world of sea slugs of Norway!

 

-Cessa & Manuel

 

Research Internship – Francesco

In the last part of 2019 Francesco Golin collaborated with us as an intern in project NorHydro. Francesco is a student at the University of Algarve, where he is enrolled in the International Master of Science in Marine Biological Resources (IMBRSea). We asked him about his internship and this is what he told us:

During the 2019 autumn semester I joined Luis Martell and Aino Hosia in project NorHydro as a research intern. My research contribution was aimed at finding how many species of the hydrozoan genus Euphysa are present in Norwegian waters, and how to define them morphologically and genetically. Euphysa is a common genus with 22 accepted species, but many of them are not easy to tell apart from each other, which is why we decided to implement an integrative approach for species delimitation including morphological and molecular analyses.

Some of the species of Euphysa occurring in Norway. From left to right: Euphysa aurata, Euphysa flammea, and Euphysa sp

Working on board during the cruise

My first mission as an intern was collecting some samples of Euphysa and other gelatinous organisms. Luckily, the opportunity to do so presented itself during the student cruise associated to BIO325, a course in which I participated as part of my studies at UiB.

During this cruise I used a light table to spot the tiny jellyfishes brought on board by the Multinet, then I placed them on a Petri dish and took pictures of them with a camera attached to a stereomicroscope, before transferring them to an Eppendorf tube filled with ethanol.

All these elements (the pictures of each organism, the associated sampling data, and the samples themselves) are needed for species delimitation of hydromedusae. The pictures are used to compare the morphology of different individuals and to identify important diagnostic characters (unfortunately, ethanol-fixed jellyfish are not useful for morphological analysis), while the ethanol-preserved samples are used to obtain DNA sequences.

The light table used to spot the gelatinous zooplankton

Some siphonophore parts are very transparent, and thus they are some of the most difficult animals to spot in plankton samples.

The hydrozoan Aglantha digitale (left) was very abundant in all my samples. Other cnidarians, such as this anthozoan larva (right) were also present.

My second mission consisted on gathering the original descriptions of the different species of Euphysa. This information is necessary if we want to understand what makes each species different, and will come handy when analyzing the individuals and their pictures collected on the field. Talking about species boundaries, I had the opportunity to attend a course on “Molecular Species Delimitation” offered by the University Museum. In this course I learned how to perform the analysis of DNA sequences for species delimitation, using some common software (MEGA and R) for this purpose. These are important tools that will allow us to assess the diversity of Euphysa in Norway, and together with the morphological analyses these data will help us determine if new species have to be described.

Now the semester has ended and my internship is over. Nevertheless, I hope my help was meaningful, as I want to continue being a part of this research project in the future. I will keep myself updated with the changes in the taxonomy of Euphysa, so I’m sure I will be able to join NorHydro again when I’ll come back to Bergen!

-Francesco

Guest researcher: Eric

Eric, from the Federal University of ABC, visited the University Museum in November. We asked him about his time in Bergen examining some of the least common species of siphonophores in the collections and this is what he told us:

My name is Eric Nishiyama, and I am a PhD student from Brazil. The main focus of my research is the taxonomy and systematics of siphonophores, a peculiar group of hydrozoans (Cnidaria, Medusozoa) notorious for their colonial organization, being composed of several units called zooids. Each zooid has a specific function within the colony (such as locomotion, defense or reproduction) and cannot survive on its own.

Fig_1. I had the opportunity to examine both ethanol- and formalin-fixed material from the museum. For morphological analyses, specimens preserved in formalin are preferable because ethanol-fixed individuals are usually severely deformed due to shrinkage.

Understanding how zooids evolved could provide major insights on the evolution of coloniality, which is why I am looking at the morphology of the different types of zooids. In this sense, siphonophore specimens available at museum collections provide valuable information for visiting researchers such as myself.

During my short stay at the University Museum of Bergen in November, I was able to examine a few siphonophore samples deposited at the museum’s collections. By examining the specimens under a stereomicroscope, and using photography and image processing tools, I was able to gather a lot of information on the morphology of several species.

Fig_2. Documenting the morphology of the nectophores of Rudjakovia plicata (left) and Marrus or-thocanna (right) was particularly interesting because these species are not commonly found in museum collections.

Fig_3. Other ‘unusual’ siphonophores that I was able to examine were Crystallophyes amygdalina (left) and Heteropyramis maculata (right).

Fig_4. Some large nectophores of Clausophyes preserved in formalin.

The data obtained will allow me to score morphological characters for a phylogenetic analysis of the whole group, and hopefully will help me revise the group’s taxonomy.

– Eric

Field season’s end

Sletvik field station, October 15th-23rd 2019

We wanted to make a write-up of the last combined fieldwork/workshop we had in 2019, which was a trip to the marine field station of NTNU, Sletvik in Trøndelag, in late October. From Bergen, Luis (NorHydro), Jon, Tom, and Katrine (Hardbunnsfauna) stuffed a car full of material, microscopes, and drove the ~12 hours up to the field station that we last visited in 2016.Beautiful fall in Trøndelag

There we joined up with Torkild, Aina, Karstein, and Tuva from NTNU university museum, students August and Marte, and Eivind from NIVA. We also had some visitors; Hauk and Stine from Artsdatabanken came by to visit (if you read Norwegian, there’s a feature about it here), and Per Gätzschmann from NTNU UM dropped by for a day to photograph people in the field.

Most of the workshop participants lined up Photo: Hauk Liebe, Artsdatabanken

During a productive week the plan was to work through as much as possible of the material that we and our collaborators had collected from Kristiansand in the South to Svalbard in the North. Some of us went out every day to collect fresh material in the field close to the station.The Artsprosjekts #Sneglebuss, Hardbunnsfauna, NorHydro, and PolyPort gathered at Sletvik, and with that also the University museums of Trondheim and Bergen. Of course we were also collecting for the other projects, and the museum collections.

One of the things Hardbunnsfauna wanted to do whilst in Sletvik was to pick out interesting specimens to submit for DNA barcoding. This means that the animals need to be sorted from the sediment, the specimens identified, and the ones destined to become barcode vouchers must be photographed and tissue sampled, and the data uploaded to the BOLD database. We managed to complete three plates of gastropods, select specimens for one with bivalves, and begin on a plate of echinoderms, as well as sort through and select quite a few crustaceans and ascidians for further study.

Collecting some fresh material was particularly important for NorHydro because the hydroids from the coasts of Trøndelag have not been thoroughly studied in recent years, and therefore we expected some interesting findings in the six sites we managed to sample. We selected over 40 hydrozoan specimens for DNA barcoding, including some common and widespread hydroids (e.g. Dynamena pumila), some locally abundant species (e.g. Sarsia lovenii) and exceptionally rare taxa, such as the northernmost record ever for a crawling medusa (Eleutheria dichotoma). We also used a small plankton net to catch some of the local hydromedusae, and found many baby jellyfish belonging to genus Clytia swimming around the field station.

Plan B when the animals (in this case Leuckartiara octona) won’t cooperate and be documented with the fancy camera; bring out the cell phones!

It was a busy week, but combining several projects, bringing together material spanning all of Norway, and working together like this made it extremely productive!

Thank you  very much to all the participants, and to all the people who have helped us gather material so far!

-Katrine & Luis

World Congress of Malacology 2019: 10 – 17 August 2019

On August 10, four delegates from the University Museum of Bergen made their way to Monterey Bay California, USA.

Attending the World congress of Malacology 2019, from left to right; Jenny Neuhaus, Justine Siegwald, Manuel Malaquias & Cessa Rauch

This year the World Congress of Malacology took place at the Asilomar conference grounds in Pacific Grove, Monterey. Monterey Bay is well known among many marine biologists due to its world-famous aquarium and aquarium research institute (MBARE), many marine protected areas (7; including the Asilomar State Marine reserve, close to where the conference was held), Hopkins Marine Station of Stanford University, Steinbeck Center (although located in Salinas, close enough to make it count). The latter was named after the famous marine biologists John Steinbeck and Ed Ricketts from the Monterey County; Among other works they contributed to marine biology with their famous books ‘The sea of Cortez’ and ‘Between Pacific Tides’. All in all, Monterey Bay seems like an exciting place to be for us marine biologists.

The World Congress of Malacology was organized and chaired by the famous Terry Gosliner (Terry described more than 1000 species of sea slugs!) a senior curator of the California Academy of Sciences. About 300 participants contributed to a very lively and busy scheduled week

Some of the participants of the World Congress of Malacology 2019

Registration for the conference started on Sunday the 11th of August, but Monday was the real kick off of the program with fabulous keynote speakers such as Geerat Vermeij, David Lindberg, Susan Kidwell, etc.. During the poster session Jenny Neuhaus and Cecilie Sørensen, two of our master students working in close collaboration with the Museum project Sea Slugs of Southern Norway have presented their preliminary results. Unfortunately, Cecilie could not join us due to time constraints, and the poster was presented by Cessa

Justine presenting her work on Scaphander

On Tuesday we had a crammed agenda with multiple speakers talking at the same time, divided over the different halls in a variety of sessions. It was a busy day of running around trying to catch those talks one were most interested in. Justine had her talk in the Systematics session about her PhD research on Scaphander titled; First global phylogeny of the deep-sea gastropod genus Scaphander reveals higher diversity, a possible need for generic revision and polyphyly across oceans. It received a lot of attention and numerous questions afterwards, it was great to see how her research was perceived with so much curiosity and enthusiasm.

Wednesday we had a day off filled with several excursions. Jenny went to the whale watching trip, Justine went to spot marine mammals and Cessa to a trip along the coast to meet and greet the Californian red giants. The trips were all well organized and a very nice break off the week as the many presentations and sessions made the days long and intense. The whale watching trip took place in Monterey Bay and Jenny was lucky enough to observe the mighty blue whale, Balaenoptera musculus, plenty of humpback whales (Megaptera novaeangliae), and several sunfish (Mola mola) swimming at the surface. It was an incredible experience for her to be able to watch the animals thrive in the great Pacific Ocean.

Whale-watching with Jenny Neuhaus in Monetery Bay

Cessa walking in between the Californian red giants

 

The trip to South Monterey was along the California’s rugged coastline and provided one of the most spectacular maritime vistas in the world. It has peaks dotted with the coast redwoods that go all the way to the water’s edge. The trip took you to Pfeiffer Big Sur State Park where we got the opportunity to walk through the redwood forest. Along the way we stopped at numerous scenic vistas, it was definitely a memorable day .

 

On Thursday, all well rested, we had another hectic day full of presentations, this time it was Cessa’s turn, she would talk about the ‘Sea slugs of Southern Norway project as an example of citizen science’ (Picture 8. Cessa presenting the sea slugs of Southern Norway project). It was placed in the citizen science session and many that attended had questions about citizen science which constituted a great opportunity to share our experience acquired during the last year of our project.

Cessa presenting the sea slugs of Southern Norway project

Friday, on the last day of the conference, Manuel had his talk about the phylogeny and diversity of the Indo-West Pacific gastropods Haloa sensu lato (Cephalaspidea: Haminoeidae): Tethyan vicariance, generic diversity, and ecological specialization. This was part of the recent collaborative work his previous PhD student Trond Oskars

Manuel Malaquias presenting his and Trond’s work on the phylogeny of Haminoeidae

Jenny Neuhaus won the best poster award for her research on Jorunna tomentosa

 

The day was closed off with a big dinner and the award ceremony. Prizes were handed out to the best student’s oral and poster presentations. Jenny was awarded by the Malacological Society of London the prize for the best student poster. This was a very exciting way to end a successful conference trip!

 

 

 

-Cessa & Jenny

Royal hydrozoans and noble snails at Her Majesty the Queen of the fjords

As part of our continuous quest for hydrozoans and snails, we (Luis and Justine) recently embarked on a trip to the mighty Hardangerfjord on board the RV Hans Brattström. This is an area that we at the museum are keen to explore, since there have not been many sampling efforts in Hardanger in recent years, at least not after the joint survey carried out in the years 1955–1963 and in which Hans Brattström himself (the scientist, not the ship) took part. The Hardangerfjord has changed a lot since the 1960s, developing into one of the major fish-farming regions of Norway while at the same time retaining its touristic and agricultural vocation, so it is very interesting to come back and see if and how the invertebrate communities have also changed.

Our trip started with warm summer temperatures and clear skies…

…but it quickly turned into a more ‘typical’ western Norwegian weather. Fortunately we were prepared for the rain!

The Queen of the fjords, as Hardangerfjord is sometimes known, is the second longest fjord in Norway and the fourth longest in the world, which means that we had quite a lot of ground to cover in our two day-trip if we wanted to have at least a brief look at the diversity of habitats and animals living in its waters. For this trip, we settled for a sampling scheme involving 9 stations distributed in the middle and outer parts of Hardanger, and we decided to leave the innermost part of the fjord for a future occasion. We looked at the animals living in the bottom of the fjord (benthos), the water column (plankton) and also deployed a couple of traps in order to catch specific critters. We explored rocky sites, sandy bottoms, muddy plains and kelp beds, and found an interesting array of animals in all our samples.

The samples came from the deployed amphipod traps, triangular dredge, and plankton net.

Some of the animals we saw (most of them were actually returned to the sea):

Without any doubt, the highlights of our trip were the snail Scaphander lignarius and the hydrozoans Eudendrium sp. and Laodicea sp. The colonies of Eudendrium sp. were relatively abundant in shell- and rock-dominated bottoms, but their small size and not reproductive status prevented us from identifying them to species level right away. For a correct identification, we now have to look closely at the stinging cells (nematocysts) of the hydroids, and of course we will also try to get the DNA barcode of some of the specimens. Unlike Eudendrium sp., which lives in the bottom of the sea, our specimens of Laodicea sp. were swimming around in the water column. This species is interesting because previous DNA analysis have shown that, although they look like each other, different species of Laodicea coexist in Norwegian waters, so we are looking forward to obtain the DNA barcode of the jellies from Hardanger to compare it with the sequences we have from other parts of Norway.

. A polyp of Eudendrium sp. (left) and the hydromedusa of Laodicea sp. (right)

Scaphander lignarius was quite the surprise finding. We really wanted to collect some individuals, but our hopes were not very high and we were mostly convinced that we would not see any during our trip. Luckily for us, there were several of them happily crawling around the mud in two of our stations! S. lignarius is one of the few representatives of the Scaphandridae family in Norway. This family of bubble snails is of particular interest to us to study the biogeography and speciation process of invertebrates in the deep sea on a worldwide scale, since members of the family are distributed all around the world, and most tend to inhabit depths below 500m. Sampling some of them will definitely help that project!

Two views of Scaphander lignarius

All around, this was a quite successful sampling trip, with many specimens collected to be added to the Museum Collections, and which will be very useful to many different research projects!

– Justine and Luis

PS: You can find more updates on our Artsdatabanken project NorHydro here in the blog, on the project’s facebook page and in Twitter with the hashtag #NorHydro.

 References and related literature about the survey of the Hardangerfjors in 1955–1963

Braarud T (1961) The natural history of the Hardangerfjord, Sarsia, 1:1, 3-6.

Brattegard T (1966) The natural history of the Hardangerfjord 7. Horizontal distribution of the fauna of rocky shores, Sarsia, 22:1, 1-54.

Lie U (1967) The natural history of the Hardangerfjord 8. Quantity and composition of the zooplankton, September 1955 – September 1956, Sarsia, 30:1, 49-74.

Sea slug hunt in Egersund!

I’m always scared to look at the current date, time flies! It was already two months ago that we went on a blitz fieldwork trip to Egersund with a very special group of people. But nevertheless, good times become good memories (and especially good museum specimens) and it definitely does not get too old for a small blog about it.

From January 17 to January 21 a small group of sea slug enthusiasts consisting of a student, citizen scientists, a collaborator and museum members rented a van and drove 7 hours down to our Southern neighbor town Egersund.

Egersund was not randomly picked as it is the home town to one of Norway’s most productive and dedicated ‘citizen scientist’; Erling Svensen. Author of a number of books and the most well-known and worldwide used ‘Dyreliv I havet – nordeuropeisk marin fauna’ (English Marine fish and invertebrates of Northern Europe), which amateurs and professionals alike use as an extensive research source.

Erling Svensen’s famous book Dyreliv I Havet

With his almost 5000 dives and counting, Erling knows the critters of the North Sea, big and small, on the back of his hand. Already since the beginning of the sea slug project, Erling was helping providing valuable sea slug species, so it was about time to pay him a visit and bring our team over to make Egersund “biologically unsafe” – enough so to end up in the local news!

We made Egersund unsafe enough to have a small news item about it in the ‘Dalane Tidende’, a local newspaper

The group consisted of Manuel, Cessa, citizen scientist Anders Schouw, collaborator from Havard University Juan Moles and master student Jenny Neuhaus

From left to right Erling Svensen, Anders Schouw, Jenny Neuhaus, Cessa Rauch, Juan Moles and Manuel Malaquias. Photo by Erling Svensen

Jenny just started her Masters in Marine Biology at the University of Bergen in the fall of 2018, she will be writing her thesis on the diversity of sea slugs from the Hordaland county and on the systematics of the genus Jorunna (Nudibranchia) in Europe. The results of this work will definitely become a blog entry of its own.

Jorunna tomentosa, Jennies new pet! Photo by Nils Aukan.

Two of the five days of our fieldwork were basically spendt driving up and down from Bergen to Egersund, it left us only with a good 3 days to get an overview of Erling’s backyard sea slug species. Little time as you can imagine. But time was used efficiently, as Anders and Erling are both extremely good sea slug spotters and with help of sea slug specialist Juan and the eager helping hand of Jenny, Manuel and I were able to identify and add 36 species to our museum sea slug database.

Overview of collected specimens in Egersund

In comparison, we registered 41 one species in Drøbak last year by spending almost a week at the field station! No one thought this would be the outcome (not even Erling himself, as he mentioned that he didn’t find that many sea slug species this time of year on earlier surveys). But we were all very happily surprised, and maybe it was not just luck but also the combination of people we had attending this short field trip. With so many good specialists, either professional or amateur, senior or junior, we were able to work extremely efficient and with a clear communal goal. There was little time spend in reinventing the wheel and explaining the work flow, it was a good valuable exercise that will definitely help us with future brief fieldwork trips and how to make the most from short and tight time schedules. Besides it was a very valuable experience for our student Jenny, as she got first-hand experience with what it’s like to see her study specimens alive, how to handle these fragile individuals, how to sort them from other species and how to document them, which is a good thing to know for her thesis and future career

Jenny learning a lot from the master himself. Photo by Erling Svensen

So yes, all in all our Egersund fieldtrip was short but very sweet!

Furthermore
You want to see more beautiful pictures of sea slugs of Norway! Check out the Sea slugs of Southern Norway Instagram account; and don’t forget to follow us. Become a member of the sea slugs of southern Norway Facebook group, stay updated and join the discussion.

Explore the world, read the invertebrate blogs!

-Cessa & Jenny

Job alert! PhD position in biosystematics at UMB

The following position is currently announced, application deadline is 18th of February 2019

The Department of Natural History, University Museum of Bergen (University of Bergen, Norway) opens a vacancy for a PhD student position within the field of biosystematics. The position is for a fixed-term period of four years of which 25% (one full year) is work duty including teaching assistance and curation of scientific collections at the museum.

The candidate will be working on a research project on taxonomy, systematics, and phylogeny of marine annelids and will focus on the systematic revision of the annelid family Orbiniidae.

Click here for more information and full announcement