DTU Aqua invitererer til professor Karin Hüssy og professor Teunis Jansens tiltrædelsesforelæsninger den 14. december 2023 på DTU Lyngby Campus og online.
Program
- 14:00
Karin Hüssy: Otoliths – the fishes own “black box” – and their use in unravelling the ecology of marine fishes
- 14:45
Teunis Jansen: Arctic insights – Unveiling the population dynamics of pelagic and semi-pelagic fish in Greenlandic waters
- 15:30-17.00
Reception
Om forelæsningerne
Karin Hüssy: Otoliths – the fishes own “black box” – and their use in unravelling the ecology of marine fishes
One of the greatest providers of proteins for human consumption are fish. Sustainable management of our fisheries resources relies on science-based advice giving. At the core of the advice is detailed knowledge of the ecology of the fish stocks: Geographic home range, movement patterns and behaviour, mixing of stocks, along with vital biological processes such as age, growth, reproduction and mortality. Knowledge of these ecological aspects may be obtained by decoding the information stored in otoliths – the fishes own “black box”. Combined with other approaches such as molecular methods and tagging of the fish with archival tags, otoliths are thus a powerful tool to obtain information not only of individual fish’s entire lifetime, but also of ecological aspects of the species.
In this presentation, I will show how physical and chemical properties of the environment interact with biological processes to regulate otolith biomineralization and chemical composition. Through specific case studies I will show how the chronological information stored in fish otoliths can be used to infer knowledge on fish growth, habitat use and movement, and how this information ultimately contributes to improved fish stock assessment and sustainable management.
Teunis Jansen: Arctic insights – Unveiling the population dynamics of pelagic and semi-pelagic fish in Greenlandic waters
Marine living resources drives the economy in Greenland and is an integral part of everyday living and culture. Sustainable utilization is therefore vital, but this is a challenge in the arctic where the impact from fishing is accompanied with strong environmental forcing, rapid climate change and where important aspects of the pelagic marine ecosystem are unknown.
In this presentation, I will provide examples of the work we do at Greenland Institute of Natural Resources and DTU Aqua to improve the accuracy of fish abundance estimation and thereby management advice. I will showcase how these collaborative endeavors are underpinned by technical innovations. This will provide an overview of our research centered on pelagic fish and the motivation behind this thematic focus in my research.