- Thursday 30. April
- 12:15 – 13:00
- The Nash Auditorium, 2. floor, VilVite, Thormøhlens gt 51
Coffe, tee and buns will be served.
From fish boxes to ecological questions: image-based approaches in Mediterranean fisheries (Dr. Ignacio A. Catalán Alemany)
Mediterranean fisheries are highly heterogeneous, and obtaining biological information at the spatial and temporal scales needed to understand them remains challenging. In this talk, I will show how image-based analysis of fish landings can provide detailed, high-resolution size information for multiple species, using examples from the Balearic Islands. I will then show how we combine these data with vessel tracking and environmental information to support fisheries monitoring and spatial management, and to address ecological questions in our ongoing work. The talk will highlight some of the insights and practical applications made possible by these approaches.
Ignacio A. Catalán Alemany is a Scientific Researcher at The Mediterranean Institute for Advanced Studies (IMEDEA)
Wild salmon versus farmed salmon. Short story of two viruses: ISAV & SGPV (Professor emeritus Are Nylund)
Around 300 000 wild salmon return to spawn in Norwegian rivers every year and on the way back the meet 500 million farmed salmon in the coastal area. The Isavirus salaris (ISAV) and Salmonpoxvirus gillpox (SGPV) are both natural occurring viruses in wild populations of Salmo salar. Both are also occurring in farmed salmon, but they seem to be differently affected by salmon farming. The natural hosts for ISAV are S. salar and S. trutta, while the SGPV seem to be specific for the salmon. The Fish Diseases Research Group (FDRG) has in the period 2013 – 2024 analyzed 11 000 wild salmon and around 2000 wild trout collected in National Salmon Fjord and associated river. These salmonids have been screened for 18 different pathogens that occur in wild and farmed salmon, and a significant number of the viruses from positive fish have been sequenced. These sequences make it possible to compare the relationship between ISAV and SGPV viruses found in farmed and wild salmon. Both viruses contain identical isolates in both farmed and wild salmon, but the data also shown that farmed salmon has contributed to diversification of ISAV. The evolution of SGPV seems to be, so far, limited affected by salmon farming. The main transmission of SGPV occur in rivers.
Are Nylund is a Professor Emeritus at the Department of Biological Sciences, Unviersity of Bergen