Search for dissertations about: "resurser"
Showing result 21 - 25 of 505 swedish dissertations containing the word resurser.
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21. Increasing the biological knowledge of Baltic Sea cod: growth, movements and reproductive potential from historical and contemporary data
Abstract : Knowledge about life-history traits of commercially exploited fish stocks and their possible changes over time is essential for implementing a sustainable management. Biological parameters such as growth rate, fecundity and movement patterns are in fact, underlying determinants for stock responses to environmental forcing and fishing exploitation. READ MORE
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22. Understanding the spatiotemporal dynamics of demersal fish species in the Baltic Sea
Abstract : Species are not homogeneously distributed and the interdependencies between trophic interactions, environmental factors and anthropogenic forcing determine how their distribution changes over time. Hence taking into account both the spatial and temporal components of the dynamics of potentially interacting species is essential in management and conservation. READ MORE
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23. Fish predation by the great cormorant (Phalacrocorax carbo sinensis) : analytical basis for ecosystem approaches
Abstract : This thesis concerns the diet of a piscivorus top predator, the Great Cormorant (Phalacrocorax carbo sinensis), in the Baltic Sea. The Great Cormorant has increased exponentially in numbers during the last decades. This has resulted in a human-cormorant conflict because of its perceived competition with fisheries and negative impact on ecosystems. READ MORE
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24. The interactions between cormorants and wild fish populations : analytical methods and applications
Abstract : Predation is the core in ecology, as a function in food webs which regulate both populations and communities. Seabirds are at the top of the food chain and key players in many aquatic food webs. So are humans, and in certain cases conflicts of resources arise. READ MORE
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25. Population regulatory processes in the Baltic salmon (Salmo salar)
Abstract : Knowledge and understanding of population regulation is the foundation that allows for sustainable harvest of natural populations. In this thesis, I explore potential sources of bias in stock recruitment relationships resulting from potential spawning behaviours, and investigate alternative methods that can be used in order to evaluate population regulatory processes and improve estimates of stock-assessments of the Atlantic salmon (Salmo salar) in the Baltic Sea. READ MORE
