Thesis (Ph. D.)--Göteborg University, 2005. / Includes bibliographical references.

Diss. (sammanfattning) Uppsala : Sveriges lantbruksuniv., 2007. / Härtill 4 uppsatser.

The recovering harbor seal population along the Swedish west coast has coincided with declining cod stocks. Although the cod stocks were primarily depleted by intense fisheries, some stakeholders argue that reduced seal populations could have direct, positive effects on the cod stocks. The outbreaks of Phocine distemper virus (PDV) in 1988 and 2002 when up to 66% of the harbor seals along the Swedish west coast died, could be viewed as natural experiments allowing for assessment of any positive impacts of reduced mortality from seal predation on cod abundance. I quantified removal from seal predation and fishery landings and analyzed correlations to cod abundance of different length classes. Analyses were conducted for a longer time- series, 1979-2019, reaching back to when removal from fisheries was substantially larger than that from seal consumption. I also analyzed the data with a more recent perspective, 2003-2019, starting after the later PDV outbreak when seal predation relative landing sizes has increased. During this period, fishery discard data is available and included in the models. Methods include graphical presentation, multiple linear regression analyses, and to expand the existing data on seal diet, I collected diet samples of harbor seal feces from two haul-outs in Skagerrak. No statistically significant, negative correlations between seal predation and cod abundance were found in any data set, hence, I cannot support the idea of harbor seals having an impact on cod abundance. Also, the significant correlations between cod abundance and landings were all positive. I argue that culling of seals cannot be motivated as a strategy to help cod recover, as this would jeopardize the persistence of the seal population rather than assuring cod stability.

The purpose of this study is to investigate one of the European Structural Fundprogrammes, Interreg V Öresund-Kattegat-Skagerrak (ÖKS) and the priority areaTransportation. The programme gives financial support to transportation projectsaiming to develop sustainable (environmentally friendly) transportation alternativesand solutions. Through studies and theories on cross-border collaboration (CBC) and goals forsustainable transportation a major need of joint strategies for solving shared problems,such as environmental concerns has been demonstrated. This approach ofcollaboration projects as a pillar for sustainable development has been the foundationof how the current Interreg programme has been studied and the starting point for thisresearch. The study aims to clarify the relationship between the overall view uponcooperation and joint development programmes (within areas stretching over nationaland administrative borders, such as transportation) and the specific Interregprogramme. A programme which during current period (2014-2020) experienced adrastic decline of number of applicants. In order to further understand the context thecurrent study has trough empirical research defined added values (advantages) of theCBC but also identified the perceived difficulties and barriers (disadvantages). Thefounding’s have further been compared and supplemented with perspectives fromrelevant actors engaged in transportation development. This material has beencollected through qualitative interviews enabling a vital and good understanding ofconcerned actors and their view of advantages and disadvantages with CBC. Theanalysis has also enabled the conclusion that the general view among the actors is thatcollaboration projects are necessary for a sustainable development. However, studiedprogramme with declined number of applicants did not succeed in attracting desiredparticipants. Consequently, the actors were also asked to share their view upon thedecline of applicants for current Interreg period. One identified explanation wasrelated to the administrative burden which was perceived too heavy by the actors. Inaddition, the financial part was perceived to be too low or poorly designed. Theknowledge about the programme was also found to be limited among some of theactors. To be able to involve more participants in the future it has been concluded thatimprovements within the three areas of defined obstacles have to be implemented. This investigation and findings aim to contribute to increased insights andunderstanding of the cross-border cooperation process in order to be able to reach andinvolve relevant actors in the most favourable way for successful future projects anddesired sustainable development.