Tag Archives: torsvåg

Strange creatures with strange parasites

Have you ever heard about chaetognaths, aka arrow worms? They are a phylum of worm-like animals mostly found as part of planktonic communities worldwide. Their name originates from chaeto (spines) and gnatha (jaws). As you can see in the picture below, their name refers to their hooked, grasping spines located on each side of their head. Chaetognaths use their spines to grasp their prey (sometimes other arrow worms!). Luckily for us, they are just a few cm long, up to 10-12 cm in some cases, so nothing to worry much about. They can also have a funny, Edvard Munch’s The Scream’s-like appearance, such as the benthic chaetognath below. With over 130 species described worldwide, our knowledge on their true diversity and distribution is still very scarce. What we do know is that they are one of the most important planktonic predators and the second-most abundant planktonic group. Most species are transparent, and often classified as part of the so-called gelatinous zooplankton. However, ca. 20% of the species are benthic chaetognaths that can be found close to the seabed (like the surprised guy below).

three images of arrow worms

Figure 1. Different appearances of arrow worms, the one on the right with a parasitic nematode. Credit: Zatelmar CC BY SA 3.0 (left), Luis Martell (middle) and Luis Martell and Joan J. Soto-Angel (right).

Through Artsdatabanken project ParaZoo (Metazoan Parasites of non-crustacean Zooplankton) we are studying the diversity of parasites associated with jellyfish, comb jellies and chaetognaths. As we found very interesting specimens from our sampling trips to Svalbard, we joined a recent trip to Torsvåg in Northern Norway, hoping to get additional material from this understudied area. You can read more about this joint fieldwork here and here. Our MSc student Lea will tell you a bit more about her MSc project, and her experience in Torsvåg.

From Lea:
Hei! I am Lea, a Master student working on my Master thesis about the last C in the C + C + C research group: Cnidaria, Ctenophora, and now Chaetognaths! I am working with parasites of chaetognaths in Norwegian waters, a still much understudied topic. On the sampling trip to Torsvåg in Northern Norway, I got first hand experiences with a variety of sampling methods, cool jellies, and getting to know everyone better from the marine team at the University Museum.

Among the sampling methods, my favourite was definitely catching the jellies with a small net on the pier (see Figure 2). There, we – fearless of the everchanging weather conditions – caught the biggest jellies of our trip. Afterwards, I was mainly in charge of checking jellies for parasites for the ParaZoo, where we found trematoda in 2 different jelly species!

Sadly, pelagic chaetognaths were very sparse in Torsvåg. We even deployed manually (!) a plankton net all the way to 200 m deep in search for chaetognaths, but we only found about 30 in total, that were also unparasitized. Luckily, the polychaete group next door could offer some comfort.

Let me introduce you to my absolute favourite species from the trip: The benthic chaetognath Spadella cephaloptera! Have a bad day? – Just take a look at the constantly surprised, concerned, and slightly uncanny face of this small fella! You can count on me overusing this species in my upcoming presentations!

All in all, I developed a lot of useful skills, ranging from identifying common (and uncommon) gelatinous zooplankton species to untangling a fishing rope! It was such an amazing experience to be part of this sampling trip!

Five images in a collage: three shots of fieldwork/sampling site, and two of the arrow worm

Figure 2. Net sampling from different locations in beautiful Torsvåg. Spadella cephaloptera looking constantly surprised due to the corona ciliata below the two eye pigments (Photos: Joan J. Soto-Angel and Lea Dober)

From Joan and Lea

Minute snails in Northern Norway

From 21 till 28th of May, researchers, technicians, and students of the University Museum’s marine section, travelled up North to Torsvåg, close to Tromsø, for joint fieldwork. The participants represented several Artsdatabanken projects that cover marine fungi, hydrozoans, polychaetes, parasites of jellyfish, comb jellies and chaetognaths, bryozoans, marine amphipods and finally the Lower Heterobranchia and Pyramidellidae gastropods. In this blog you can read about the general experience of the fieldwork and more details about the different projects. And here you can read about the fieldwork through the eyes of two master students who joined. And if you want to read more adventures and see more pictures check out this blog post! It was a large group of young and more experienced scientists which created the perfect opportunity for a lot of knowledge transfer.

This was also the first “big” fieldwork trip for the Lower Heterobranchia and Pyramidellidae project, after several sampling events in the Bergen area, which you can read here. Both Lower Heterobranchia and Pyramidellidae include small snails, just a few millimetres in length that are hard to identify (they can resemble other small species of gastropods). The diversity of these tiny sea snails is poorly understood in Norway, and thus, during this project these sea snails will be studied by combining DNA barcoding and shell characters. Sampling will be based on the use of dredges, grabs, and snorkelling.

Pyramidellidae are regarded as ectoparasites and are often found living on other molluscs or other marine invertebrates, but also free in soft sediments. The Lower Heterobranchia are often found on algae, for example on the stipes and in between the holdfasts of large kelp. Because of the small size of these snails the best way to collect them is by sampling the substrate they live on. So, this is what we did, we went snorkelling several times in the cold waters of Northern Norway, but thanks to good neoprene layers we were able to keep warm and simultaneously looking like seals!

Underwater shot of a person snorkelling, collecting algae just below the surface

Collecting the right substrates for the Lower Heterobranchs and Pyramidellidae while snorkeling. Photo by Eva Charlotte Samson, UiB

Little lab set-up in the kitchen to sort through the samples.

Little lab set-up in the kitchen to sort through the samples. Photo by Cessa Rauch, UiB.

 

It was challenging to find our snails; there was plenty of kelp and high diversity of many other taxonomic groups, but the conditions were not exactly right especially for the pyramidellids that seem to prefer areas with strong currents.

So, even though we sampled many different habitats, we often ended up not finding our snails when back in the lab sorting under the microscope.

 

 

 

A tiny snail lookin up at the camera

Species of Pyramidellidae; Odostomia turrita. Photo by Cessa Rauch, UiB.

 

Yet, after collecting a ton of material and spending many hours sorting, we finally found one pyramidellid!

In this case Odostomia turrita.

Odostomia are neat little pyramidellids that have glands with distinct colours, which makes somewhat easier the identification of species.

Drawings showing the colour patterns of snails

The different colour patterns distinguish different Odostomia species. Source from Høisæter 2014. (Høisæter, T. (2014). The Pyramidellidae (Gastropoda, Heterobranchia) of Norway and adjacent waters. A taxonomic review).

Although minute, the lower heterobranch were “easier” to find… They seem to be less picky with the environment, and on kelp and sand we managed to sample a few different species, amongst others two very similar ones: Ammonicera rota and Omalogyra atomus. In addition, we found in the sand and gravel small snails of the genus Rissoella – R. globularis.

Field season has just started, this was a good beginning for a busy Summer with many more blogs to come!

-Cessa & Manuel

NOAH goes North again!

A couple of weeks ago, a team of five jellyfish and polyp enthusiasts travelled to Torsvåg, Vannøya, a beautiful location two hours north of Tromsø by car (more about the fieldwork can be found here). Our goal? Collect, identify and catalogue some little-known hydrozoans for Artsdatabanken project NOAH (Norwegian Arctic Hydrozoa). This is the 3rd dedicated NOAH trip to obtain Arctic samples (or examine collections) in the last 12 months! After a very successful Arctic expedition to the West and North of Svalbard on board Kronprins Haakon in the context of the Barents Sea Ecosystem Survey by IMR, and a 1-week workshop at the Institute of Oceanology Polish Academy of Sciences (IOPAN) co-organized by our colleague Marta Ronowicz, this time we focused on the underexplored coasts of northern Norway.

A collage of reserch related photos; people working in lab, a reserach vessel

Recent NOAH-related sampling trips. On top, Barents Sea Ecosystem Survey by IMR on board icebreaker Kronprins Haakon; in the middle, at IOPAN examining Marta Ronowicz’s extensive collection; bottom, NOAH team in Torsvåg (Troms). Pics: Joan Soto, Piotr Bałazy, Robert Johansen

Cruises, especially on cutting-edge icebreakers crashing ice on their way to the poles, are a lot of fun, but getting deep-water samples of both jellyfish and polyps is all but easy. Consequently, even when we carefully optimize the sampling procedures, some fragile species often arrive damaged or in bad shape. This time, we collected shallow-water specimens using our own hands. In addition to (MANUAL!) net deployments at ca. 180 m depth, we intensively checked marinas, tide pools, and shallow infralittoral environments by snorkeling. It worked fantastically well for those picky jellies and polyps which tentacles/polyps get lost after being trawled or towed with a tone of hard-bodied invertebrates and slimy fish within massive nets. We took the opportunity to document them in detail using both microscopes and macro photography. During our trip, we had the visit of Stine and Linda from Artsdatabanken. They even kindly gave us a hand collecting jellyfish from the piers! Good catch!

A photo collage of scientists at work, and a reindeer (presumably also at work)

Wide array of sampling methods, landscapes and local fauna, including a brand new wet lab (before: living room) specially made for the occasion. Stine and Linda testing our hand nets and successfully collecting some jellies. Pics: Joan Soto, Praveen Raj.

Each of us had our favorite species and top findings for the trip, and we were really excited to see alive and in good shape those species we have only examined within preserved collections, or only read about in scientific publications. These findings will definitely contribute to a better knowledge on the true diversity and distribution of these little known species, some of which have rarely been reported that far north in continental Norway.

I (Joan) stop here and leave you with some insights from the other NOAH team members that joined the trip: Marta and Praveen.

From Marta:
This was such a very interesting experience! During my work I usually study deep ecosystems, so I do not often see fresh samples of benthic hydroids, and when I do, they are often damaged by the sampling gear (e.g. bottom trawl, beam trawl…). This trip to Torsvåg has allowed me to sample the intertidal pools and marinas with my own hands, discover the great diversity that exists just below the surface, and to see multiple species in a way I never seen before.

For me, the most interesting species were undoubtedly the athecate hydroids, such as the incredibly beautiful Zanclea spp. and Sarsia spp. These animals are extremely fragile due to the lack of a theca to protect the polyp. In Torsvåg, I saw athecate hydroids of extraordinary quality, studied their sexual structures, their morphology, colours, behaviour…  Simply: WOW!!! I’m very much looking forward to the next NOAH trip!

Collage of microsope images of hydrids (looks like sticky flowers), happy people in lab and out in the field

During our sampling trip, Marta Gil (visiting researcher) showed a lot of excitement about the diversity in the intertidal pools and collected beautiful athecate polyps, all with reproductive structures! Pics: Joan Soto.

From Praveen:
My first sampling trip after joining the Cnidaria and Ctenophora Team as a PhD student was nothing short of exhilarating. Our team, led by Joan Soto, was focused on various life stages and projects related to the phyla Cnidaria and Ctenophora. Although I had conducted similar sampling procedures in India, working with live specimens of both planktonic and benthic stages of Cnidarians in Torsvåg was a new and fascinating experience.

One of the trip’s most challenging parts was venturing into open waters with a small fishing boat to collect samples. We had to troubleshoot a bit on board, but it finally turned out to be a success. Despite not finding Dimophyes arctica, one of the target species for my PhD, I was captivated by the immense diversity of hydroids in the piers near the island, some of which might be the so-far unknown polyp stage of some known Norwegian hydromedusae. Special thanks to Luis and Marta, who taught me a lot about hydrozoan taxonomy, and Cessa and Jon for driving the boat and patiently wait for the net to be recovered.

The research was undoubtedly the focus, but the social activities and adventures we shared were equally memorable. Torsvåg itself was mesmerizing, with its high mountains and breathtaking views. We all enjoyed evening hikes and took advantage of the midnight sun, which provided a perfect balance to our intense sampling schedule. Our group dinners were another highlight of the trip for me: with colleagues from 7 different nationalities and 3 continents, we had a delightful variety of cuisines as we took turns for preparing dinner.

All in all, this sampling trip was an incredible blend of scientific discovery and personal enrichment. The stunning landscape and the camaraderie of our team made it an unforgettable experience.

A collage of images, three showing happy poeple out in northern Norwegian nature, and five of different jellyfish photographed against a black baground

Praveen Raj on his first sampling trip for his PhD. He not only captured and identified an impressive amount of jellyfish, but also had a great time hiking around Torsvåg and enjoyed the dramatic landscapes that Northern Norway can offer. Pics: Joan Soto, Praveen Raj, Lea Dober.

From Joan, Marta and Praveen.

Torsvåg through the eyes of two of our MSc students

“Ooh ooh ooh! I found a parasite! Bonita!”
– A phrase not usually heard in the fishing harbor of Torsvåg! But this week was far from the usual fishing business.

Lea (left) and Eva (right) out sampling on the boat. Photos: Eva Samson & Nataliya Budaeva

Heisann!
We are Eva and Lea, and we’re marine biology students in the second semester of our masters degree.

Since we’re writing our master’s theses at the University Museum, we got to be a part of the fieldwork in Torsvåg (Troms) in the last week of May.

Welcome to our first sampling trip with the researchers from the University Museum of Bergen and the University of Tromsø!

 

scenic shot of a small island connected by a bridge to the bigger island

Torsvåg seen from one of the (smaller) mountains of Vannøya
(Photo: Lea Dober)

As the trip was a joint project by different groups that work on different phyla, we got opportunities to try a lot of different sampling methods.

Here is a couple of our favorites:

  • Chasing jellies from piers, à la Pokemon “gotta catch them all”
  • Freediving in the 4°C-cold but crystal-clear water
  • Setting sail to deeper waters, sampling at depths up to 50 m with a grab and 180 m with a plankton net with pure biceps-power (Kudos to all strong men and women)
    collage of images where various people dressed in rain gear operates a grab and a net on a boat

    Haul away! Sampling from a boat that – unlike our research vessels – does not have a winch, meant a good workout! Here’s Eva, Tom and Jon working the grab, and Praveen and Joan with the plankton net. Photos: Eva Samson, Katrine Kongshavn

    A bucket full of joy and jellies! (Photo: Lea Dober)

Following the sampling we also spent quite some hours processing the samples and taking pictures in the lab. I (Eva) had my own little workspace where I usually helped with sorting the benthic samples, mostly focusing on annelids as I’m also working on these in my thesis. At the beginning of the week I was struggling to even find worms in between all the sandgrains. But luckily I had a lot of experts sitting in the same room and helping me! And little by little, I got more confident in identifying the common families of polychaetes.

Three people working with stereomicroscopes

Jon, Eva and Tom working in the improvised lab for benthos. Photo: Katrine Kongshavn

And I (Lea) worked in the gelatinous zooplankton lab, right next to the polychaete group. There, I helped with sorting zooplankton, checking the jellies for parasites, and taking pictures of the specimens. A great opportunity to get to know more about the fascinating diversity of jellies in Norway!

At the end of the long days, we usually fell right into bed and even the midnight sun couldn’t keep us from falling asleep within minutes!

our quite unusual home for a week – the Torsvåg lighthouse in the midnight sun! (Photo: Eva Samson)

Not only the life underwater had a lot to offer, but we were also astonished at the spectacular wildlife above the surface. Otters, reindeer, all sorts of arctic birds, you name it…

All in all an incredible week for us master students to learn all the field methods and work on living specimens – quite different from the fixed material in the Museum collection. And a great opportunity to get to know everybody from the marine invertebrate groups better!

Lea & Eva

Fieldwork at Torsvåg Lighthouse (Troms)

map of Norway with a marker indicating Torsvåg, a bit north of Tromsø

Torsvåg lighthouse. Graphic from norgeskart.no)

 

During the last week of May, eleven of us in “the marine group” went on fieldwork together, up far north.

Based in Torsvåg (see map), we’ve collected material for several species mapping projects supported by the Norwegian Taxonomy Initiative (Artsprosjektet).

 

group photo of th eparticipants - 11 scientists in outdoor clothing standing in front of the ocean

The UMB participants. From back left: Joan, Jon, Tom, Nataliya, Katrine, Cessa, Marta (guest of NOAH). Front from left: Lea, Luis, Eva and Praveen

The fieldwork originated from the collaboration between the projects “Norwegian Marine Fungi” (Teppo Rämä, UiT), “NOAH – Norwegian Arctic Hydrozoans” (Joan J. Soto-Àngel, UMB), and “Polychaetes in the Arctic” (ManDAriN) (Nataliya Budaeva, UMB).

Additionally, the projects “Lower Heterobranchia and Pyramidellidae of Norway,” “Parasites on Jellyfish, Comb Jellies, and Chetognaths” (ParaZoo), “Digitization of Norwegian Bryozoans” (NorDigBryo), and “Marine Amphipods: Diversity, Species Complex, and Molecular Studies” (MADAM) were represented (many of us participate in multiple projects), covering a wide range of organisms.

The light house, and some signs that you may have been invaded by marine biologists (photo: K. Kongshavn)

Weather-wise, the Bergen team had some doubts as we packed our car in nearly 30-degree heat while snow was falling up North. However, it turned out that good weather awaited us! By the time we settled into our accommodations, the spring-winter was over, the sun came out – and didn’t set! An advantage of being in the land of the midnight sun, for sure.

four images: two from plane window going from summer (bergen) to winter (tromsø), two screen shot of the weather reporting in media

From summer to winter – or? (photos: K. Kongshavn, screengrabs from yr.no and nrk.no)

The scenery was breathtaking!
Upon arriving at Torsvåg Lighthouse, Teppo treated us to pancakes and a strategy meeting. Before the evening was over, we had our first samples in the lab, collected at low tide near the lighthouse.

scenic shot of tidepool and snow covered mountains

Our first colleting of the trip was done in these tide pools. Photo: K. Kongshavn

From there, it was a flurry of activity: collecting from tide pools, docks, marinas, kelp forests, and boats. We had one day of suboptimal weather with too much wind for extensive outdoor work, but by then we certainly had enough material to keep us busy indoors.

a collage showing different gears and methods used for collecting samples

Sampling methods: Snorkelling, from boat, hand pick in the intertidal, using a (small!) grab, sieving and collecting from piers and marinas. Photos: K. Kongshavn

In total, there were 14 of us, spread across the lighthouse and two apartments.
The lab space was set up for fungi in the lighthouse, while the two apartments were home to “team cnidarians & ctenophores” and “team benthos” (polychaetes, snails, bryozoans, and amphipods). Sorting, identification, photography, and documentation took place, with samples migrating between labs as we discovered interesting finds.

a collage of different animals; a bristle worm, a tiny snail, an amphipod and a bryozoan colony

Some of our collected animals, a screenshot from the dealing of samples via WhatsApp, and a sample being sorted. Fotos: K. Kongshavn

We also had a nice visit from the Norwegian Biodiversity Information Centre (Artsdatabanken), who joined us for fieldwork and lab activities. Stay tuned for a news article—we’ll share the link when it’s available.

A big thank you to everyone for their great attitudes, willingness to share knowledge, samples, and boat time, as well as for all the delicious food made and fun memories created!

Keep an eye out for posts from the different projects in the near future!

–Katrine (on behalf of the travelers)