Velizara Stoilova (RivEM and Norconsult’s industry Ph.D. student) from the biology department of Karlstad University will be giving a seminar about her ongoing doctoral research entitled Existing approaches to facilitate downstream migrating fish. Velizara mainly works on solutions for fish migration and connectivity of rivers impacted by dams. As the title suggests, Velizara will be giving a talk on existing approaches to facilitate downstream migrating fish in rivers with limited connectivity and outlining her planned research.

This seminar will be streamed live on zoom on the 18th of January at 13.15 (CET). To join the seminar live on zoom, use the link https://kau-se.zoom.us/my/kaubiology. You are all welcome.

Dr. Mahboobeh Hajiesmaeli, a PostDoc Researcher from Karlstad University’s biology department and a member of the River Ecology and Management (RivEM) group will be giving a talk on how individual-based models (IBMs) of salmonid populations can be used as an effective tool for understanding and managing fish population responses to hydropeaking (hydropower short-term regulation) practices. The main focus is on the first application of an individual-based model, inSTREAM 7.2-SD, to assess the effects of peaking flows on growth, survival and distribution of Atlantic salmon (Salmo Salar) and brown trout (Salmo trutta) in the lower Gullspång River, Sweden. Lilla Åråsforsen (see picture below) was used as the study site for the IBM modeling.

This seminar will be streamed live on zoom on the 21st December at 13.15 (CET) at the link https://kau-se.zoom.us/my/kaubiology

On 15-6-2021 Sebastian Rock will be giving a talk introducing his work on the host-parasite interactions of unionid mussels. Within the broader LifeConnects projects, this work will improve mussel conservation and reintroduction efforts of this little studied order of bivalves in Sweden and around the world.

River Vramsån, a spot for future mussel reintroduction (photo by Sebastian Rock).

The seminar starts at 13.15 and will be streamed live over Zoom. Contact Olle Calles (olle.calles@kau.se) to receive the zoom link to this seminar.

On 25 May, Sara Cousins, professor in Physical Geography and associate professor in Plant Ecology at Stockholm University, will give a talk entitled “How does landscape change affect plant diversity?”. Sara combines plant community ecology and landscape history to improve the understanding of how land use changes affects plant dispersal and community composition, and also focuses on how climate change affects these processes.

The seminar starts at 13.15 and will be streamed live over Zoom. Contact Olle Calles (olle.calles@kau.se) to receive the zoom link to this seminar.

On 6 April, Ted Morrow will give a talk entitled “Sexually antagonistic genes in flies and humans”. Sexually antagonistic selection occurs when natural selection on traits shared by males and females operates opposite directions in the two sexes. Sexually antagonistic genetic variation is apparently common and taxonomically widespread and yet very few specific genetic loci have been identified. The talk will give an overview of experimental work that has been carried out in the Morrow lab to find these genes in the fruit fly model as well as ask why no sexually antagonistic genes have been reported from humans.

The seminar starts at 13.15 and will be streamed live over Zoom. Contact Olle Calles (olle.calles@kau.se) to receive the zoom link to this seminar.

On March 30th Jeff Marker, PhD student in our group, will be giving a talk on his work involving stable isotopes in spiders. He investigated the feasibility of using non-lethal samples in laboratory and field-collected spiders finding, in general, spider legs are reliable proxies for stable isotope values in whole bodies. Jeff will discuss some of the implications including more robust conservation efforts and the possibility of endangered species sampling.

The seminar starts at 13.15 and will be streamed live over Zoom. Contact Olle Calles (olle.calles@kau.se) to receive the zoom link to this seminar.

On Tuesday 9 March, Einar Kärgenberg, a senior researcher in Wildlife Estonia, will give an overview of their recently published studies. These describe the movement patterns of lithophilous migratory fish in Estonian free-flowing and fragmented rivers using acoustic telemetry. Behavioural patterns of little-studied cyprinids (asp (Leuciscus aspius) and vimba bream (Vimba vimba)) were identified. In addition, the effectiveness of potential and implemented mitigation measures (removal of dams, building fishways, the effectiveness of bar-racks) was assessed. Additional methods (incl. fyke-nets, diving) were used to directly estimate the mortality of Atlantic salmon smolts (Salmo salar) caused by Kaplan-type turbines.

The seminar starts at 13.15 and will be streamed live over Zoom. Contact Olle Calles (olle.calles@kau.se) to receive the zoom link to this seminar.

Photo: Aron Hejdström

On Tuesday 16 February Kaj Hulthén will give the seminar “Causes and consequences of partial migration in a freshwater fish”. Kaj works as a researcher in the research group Aquatic Ecology at Lund University. Kaj is particularly interested in intraspecific variation in migratory behaviour and works primarily with partially migratory fish populations in the lakes of southern Sweden. During the seminar Kaj will mainly talk about why certain individuals make the decision to migrate whereas others choose to stay as year-round residents.

The seminar starts at 13.15 and will be streamed live over Zoom. Contact Olle Calles (olle.calles@kau.se) to receive the zoom link to this seminar.

Brown trout (Salmo trutta) eggs with eyed embryos

On Tuesday 8 December Kalle Filipsson, RivEM PhD student, will present his work on how elevated temperatures and predator presence during egg incubation affect development and behaviour of brown trout. The seminar starts at 13:15 and will be streamed live on Zoom. Contact Kalle (karl.filipsson@kau.se) if you are interested in attending the seminar, and he will send you a link.

Jeff Marker and Jeanette Karlsson (research assistant) electrofishing in a small stream.

On Tuesday 1 December Jeffery Marker, RivEM PhD student, will be giving a talk where he presents the plans for his PhD project.

The seminar is held on Zoom and starts at 13:15. Everyone is welcome to attend the seminar. Contact Jeff (jeffery.marker@kau.se) or Olle Calles (olle.calles@kau.se) if you want to attend, and they will send you a link.