Field station full of stories

Category: research (Page 1 of 2)

Funding opportunity to conduct research at Seili

CALL NOW OPEN! The European project ASSEMBLE Plus has opened its second call for Transnational Access, where researchers can apply for support to conduct research at one of more than 3 marine stations distributed over 16 countries. This call will give the opportunity to gain access to a wide array of technologies and services in the fields of marine science. The TA funding covers travel, accommodation, access to labs, research services, and standard disposables (but not researcher’s salaries).

In Finland, Tvärminne Zoological Station (University of Helsinki), the Archipelago Research Institute in Seili (University of Turku) and Husö biological station (Åbo Akademi University) offer access. Finnish researchers cannot apply for access to the Finnish stations, but are encouraged to apply for access to some of the other partner institutions.

In this new call, applications can be submitted at any time. Applications will be evaluated in six rounds, with the next collection date being 28 September 2018.   More information can be found here.

The Archipelago Research Institute provide facilities for various types of research projects at a unique location in the middle region of the Archipelago Sea. Researchers working at the station will have access to the Institute’s long-term environmental monitoring data as well as are able to use the Institute’s research vessel r/v Aurelia or any of the smaller vessels. The institute’s staff also have good local knowledge of the sea area and are there to support for visiting researchers. For more information regarding the Institute and Seili island, please visit our website
or contact us.

New paper! Influence of environmental conditions, population density, and prey type on the lipid content in the northern Baltic Herring

Our new paper, where we investigated the effects of different environmental stressors on the lipid content of the northern Baltic Herring (Clupea harengus membras) was recently accepted for publication in the Canadian Journal of Fisheries and Aquatic Sciences.

In this study we collected herring samples from local trap net fishermen during 1987-2006 and 2013-2014 and analysed their lipid content and fatty acid composition. We discovered that the average lipid content of herring muscle has decreased on average from 5-6% wet weight (w.wt) to 1.5% w.wt. The decrease in sea water salinity and increased size of the herring stock explained best the declining lipid content. Also,  sea water temperature during January-April also had a significant effect in our modelling. We estimated that the amount of the lipid storage incorporated in the spawning stock decreased by approximately 45% during the study, with respective energy content decreases. Fatty acid composition analysis revealed that herring lipids contained a high proportion of essential fatty acids EPA (20:5n-3) and DHA (22:6n-3), which likely originated from its main summertime prey, the freshwater calanoid copepod Limnocalanus macrurus – a zooplankton species that has become highly abundant in the Bothnian Sea.

Global climate change can affect the energy content of fish by altering their lipid physiology and consumption.The results of this study illustrate that various climate change induced processes are leading to changes in the lipid content of the Baltic Herring and, consequently, to changes in the energy flows of the northern Baltic ecosystem.

Silakka

Herring from the Archipelago Sea. Photo: Johannes Sahlsten

Rajasilta, M., Hänninen, J., Laaksonen, L., Laine, P., Suomela, J.-P., Vuorinen, I. & Mäkinen, K. 2018. Influence of environmental conditions, population density, and prey type on the lipid content in Baltic Herring (Clupea harengus membras) from the northern Baltic Sea. Canadian Journal of Fisheries and Aquatic Sciences (accepted for publication)

Read more about the project:

The Baltic herring project

 

New seawater laboratory in the making

During the winter, the “Laundry” building has undergone major renovations, which finished a few weeks ago. This week our staff started to move the lab equipment, glassware and other small items from the water lab in the main building (also known as a course lab) to the new sea water lab. The old lab will also undergo some renovations later this year and transform into something complete different. Here is a sneak peak to the new seawater lab!

Seili sea water laboratory

The “Laundry” building (on the left) will significantly improve the field laboratory facilities on the island. Next to it is a red storeroom (“Makasiini”), which includes two climate chambers and a couple freezers, where researchers can store samples during summertime. On the right is the “Sikala” building, named after its ancient use as a piggery. The building nowadays also functions as a small seawater lab with facilities for indoor and outdoor aquaria experiments. 5.5-6 PSU seawater is supplied to both labs with openings outside the island.

Seili sea water laboratory

The laundry room after the renovations.  The old washing machines and drier are replaced with a fume hood and stainless steel tables. The room is almost finished, only a couple of items remain to be added.

Seili sea water laboratory

The former drying room is still empty, waiting for two aquaria racks to be installed. The space is designed for experimental work.

Seili sea water laboratory

Previously a gym for the staff and visitors, this  course room is now a perfect class room for school and university students awaiting to learn about the Baltic Sea and species identification. The cabinets includes new Zeiss stereomicroscopes, acquired with FINMARI funding, and all glassware and plastic items you need in handling samples. Next week the room will receive few finishing touches, when tables and chairs arrive. The room will also include a  video projector and a WiFi connection.

Ways FINMARI infrastructure has improved our research

High-quality research and teaching requires investment in good research infrastructures. The FINMARI consortium was founded in 2013 and since then, with its support, we have been able to modernize and improve our research infrastructure.  Good research equipment help researchers and students across disciplines to study various interesting and important questions, related for example to the climate change. Here we introduce some of the equipment we have recently acquired.

Last week, we visited Tvärminne, the Zoological Station of the University of Helsinki and attended in the FINMARI Researcher Days. During the two-day meeting, we presented our latest work as well as heard many interesting presentations from other FINMARI partner organizations. In the photo, our master’s student Markus Weckström is giving a presentation on his master’s thesis. Photo: Jari Hänninen.

What is FINMARI?

Finnish Marine Research Infrastructure (FINMARI) is a cross-institutional consortium founded in 2013 and coordinated by the Marine Research Centre of SYKE. The consortium assembles research institutes, universities and a state-owned company, all with a strong interest in marine research. The distributed infrastructure network includes field stations, research vessels an multi-purpose icebreakers, laboratory facilities, ferryboxes, fixed measurement platforms and buoys.

Our research vessel r/v Aurelia is a part of the FINMARI infrastructure network.The 18,1 m long vessel hosts small wet and dry labs and is equipped with standard hydrographic and marine biological research and sampling equipment (incl. CTD, sediment corers and grabs, An acoustic Doppler current profiler (ADCP), on-line chlorophyll fluorometer, Meridata digital sonar system and other sonars), weather station, differential GPS, Navi Fisher navigating system. R/v Aurelia operates in the Archipelago Sea.

The latest major additions to our research infrastructure have been a Hydro-Bios Multinet Mini and a Manta trawl. The Multinet allows the collection of 5 parallel horizontal or vertical zooplankton samples (mesh size 100 um) and thereby essentially increases sampling efficiency by allowing the collection of more samples in less time. The Manta-trawl is a horizontal net system (mesh size 335 um), which allows researchers to collect microplastics and plankton from the surface waters.

The multiple plankton sampler on board of r/v Aurelia.

Sampling microplastics in the Arctic with the manta trawl. Did you know that the net was named after the Manta ray due to their similar shape?

In 2015, we acquired 10 aquaria racks. Each rack includes 12 aquaria with a closed water circulation to a flow-through system. Recently the aquaria have been used to study how the projected future salinity conditions of the Baltic Sea will affect the genetics of bladderwrack (Fucus vesiculosus).

University and school courses visiting Seili have been able to use new  improved stereo microscopes since 2016.

In spring 2018, we will also receive a side scan sonar system for shallow water, with which we’ll be able to study for example the bottom morphology of fish spawning grounds. The equipment can also open new research possibilities for example in marine archaeology.

Researchers interested in working  abroad may apply for funding at Assembleplus.eu. Assemble plus provides transnational access to marine biological research facilities and resources. At Seili, we offer a wide variety of services, including access to a brackish-water coastal ecosystem, state-of-the-art experimental facilities, historical observation data, and various research support services. Contact us for more information or stay tuned for new funding calls!

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