The Baltic Sea Seal and Cormorant project aimed at producing new knowledge of the seal and cormorant induced problems, and at raising public awareness about the troubled situation in the Baltic Sea area. In co-operation with the Natural Resources Institute Finland the project launched a survey in 2018 to investigate the impacts of seal and cormorant populations on small-scale fishing livelihoods along the Baltic Sea coast. This report presents the main results based on 219 interviews conducted in 6 countries.
Capital and environmental valuation in the Finnish fisheries – technical aspects and policy implications
The thesis describes the justification for the choices made in the estimation process and how these choices affect the results. In addition, the differences between economic and financial analysis are discussed.
Evaluation of the Gulf sampling method : Report conducted in the VELMU Inventory Programme for the Underwater Marine Environment
Along the Finnish coast, the Gulf Olympia paired ichthyoplankton samplers have been widely used for collecting early life stages of pelagic fish, e.g. within the Finnish Inventory Programme for Marine Underwater Environment (VELMU), aiming to localize larval habitats. The aim of this study was to examine how prevailing conditions during the sampling period impact the sampling efficiency and the data obtained with the Gulf Olympia samplers.
Synthesis on bioeconomy monitoring systems in the EU Member States – indicators for monitoring the progress of bioeconomy
This report presents an overview of existing bioeconomy strategies, policies or related initiatives and indicators to monitor and assess these at EU MS level, and the importance of existing bioeconomy sectors at national level. Furthermore, it presents the existing or needed most suitable bioeconomy key indicators and related indicators, and their respective data availability, for assessing and monitoring the progress of a bioeconomy at national level. The identified most suitable bioeconomy indicators important and feasible at the national context, can contribute to the further discussions when setting the frame for the development of a common EU bioeconomy monitoring system.
The results show, that the injury rate of Finnish commercial fishers is high. Forty per cent of the fishing-related injuries occur aboard or when entering or leaving the vessel, while 37% happened ashore, and 11% on sea or lake ice. The most common type of incident is preceded by a slip, trip, or sway followed by a fall to lower level.
Suppression of Saprolegnia infections in rainbow trout (Oncorhynchus mykiss) eggs using protective bacteria and ultraviolet irradiation of the hatchery water
Since formalin is widely used in prevention of Saprolegnia infections in salmonid fish hatcheries, there is a need for more environmentally safe treatment methods.
In this study, we assessed boldness-indicating behaviors of Eurasian perch Perca fluviatilis using individually conducted experiments measuring the time taken to explore a novel arena containing predator (burbot, Lota lota) cues.
This study addresses long term changes in coastal fish communities at Baltic Sea regional scale, in order to identify overall trends and support the operationalization of large scale status assessments of marine biota. However, the results for the two last time windows indicate some improvement in <em>Piscivores</em> (frequency of trends within the expected range in 2003–2012, predominately increasing trends in 2004–2013).
Social success of in-stream habitat improvement: from fisheries enhancement to the delivery of multiple ecosystem services
Stream restoration often aims to enhance fisheries by improving stream conditions for target fish species. However, river restoration has a potential impact on a variety of ecosystem services. Results indicate that both user groups highly supported the restoration goals, but they were not always satisfied with the restoration outcomes.
Estimating the mortality caused by great cormorant predation on fish stocks: pikeperch in the Archipelago Sea, northern Baltic Sea, as an example
In this study, we calculated the annual instantaneous mortality caused by great cormorants (Phalacrocorax carbo sinensis) on young pikeperch (Sander lucioperca), using data from Archipelago Sea, southwestern coast of Finland.
Enriched rearing environment and wild genetic background can enhance survival and disease resistance of salmonid fishes during parasite epidemics
The importance and volume of aquaculture is increasing world-wide. Rearing practices play a key role in determining growth rate, survival and disease resistance in aquaculture fishes.
Developing methods to reduce the incidental catch of non-target species is important, as by-catch mortality poses threats especially to large aquatic predators. We examined the effectiveness of a novel device, a "seal sock", in mitigating the by-catch mortality of seals in coastal fyke net fisheries in the Baltic Sea.
This review provides a coherent view of the current understanding of DOM dynamics in the Baltic Sea.
The relationship between stocking eggs in boreal spawning rivers and the abundance of brown trout parr
Stocking with eggs has been widely used as a management measure to support degraded salmonid stocks. In Finland, Atlantic salmon and both seamigrating and lake-migrating brown trout are stocked as eggs, alevins, fry, parr, and smolt, whereas trout are also stocked as mature fish. The aim of this stocking is to improve catches and to support collapsed spawning stocks