| 1. |
- Granhall, Ulf, et al.
(författare)
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Bacterial community diversity in paper mills processing recycled paper
- 2010
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Ingår i: Journal of Industrial Microbiology & Biotechnology. - : Oxford University Press (OUP). - 1367-5435 .- 1476-5535. ; 37:10, s. 1061-1069
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Tidskriftsartikel (refereegranskat)abstract
- Paper mills processing recycled paper suffer from biofouling causing roblems both in the mill and final product. The total bacterial ommunity composition and identification of specific taxa in the process ater and biofilms at the stock preparation and paper machine areas in a ill with recycled paper pulp was described by using a DNA-based pproach. Process water in a similar mill was also analyzed to nvestigate if general trends can be found between mills and over time. acterial community profiles, analyzed by terminal-restriction fragment ength polymorphism (T-RFLP), in process water showed that the dominant eaks in the profiles were similar between the two mills, although the verall composition was unique for each mill. When comparing process ater and biofilm at different locations within one of the mills, we bserved a separation according to location and sample type, with the iofilm from the paper machine being most different. 16S rRNA gene clone ibraries were generated and 404 clones were screened by RFLP analysis. rouping of RFLP patterns confirmed that the biofilm from the paper achine was most different. A total of 99 clones representing all RFLP atterns were analyzed, resulting in sequences recovered from nine acterial phyla, including two candidate phyla. Bacteroidetes epresented 45% and Actinobacteria 23% of all the clones. Sequences with imilarity to organisms implicated in biofouling, like Chryseobacterium pp. and Brevundimonas spp., were recovered from all samples even though he mill had no process problems during sampling, suggesting that they re part of the natural paper mill community. Moreover, many sequences howed little homology to as yet uncultivated bacteria implying that aper mills are interesting for isolation of new organisms, as well as or bioprospecting.
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| 2. |
- Charisiadou, S., et al.
(författare)
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Coastal aquaculture in Zanzibar, Tanzania
- 2022
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Ingår i: Aquaculture. - : Elsevier. - 0044-8486 .- 1873-5622. ; 546
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Tidskriftsartikel (refereegranskat)abstract
- This study provides an overview of the multi-sectoral coastal aquaculture development in Zanzibar (Tanzania) over the last thirty years based on empirical evidence from interviews, field observations, policy reports and literature reviews. Despite the immense potential of aquaculture for food and livelihoods, only seaweed farming has so far established into commercial-scale production. This activity is dominated by women and became widespread in the early 1990s as a small but regular source of income. However, seaweed farming constraints such as frequent seaweed die-offs, as well as economic and institutional constraints inhibit its development. Other types of aquaculture activities such as fish farming, mud crab fattening, half-pearl farming, sea cucumber farming and sponge and coral cultures are under development with limited production or in experimental stages. Common constraints among these activities are economic limitations, lack of technical infrastructure and skills, small and irregular production, and limited trade and market availabilities. At the same time, there is a lack of sufficient management and monitoring systems, while there are no formal regulations or clear strategies to boost aquaculture at the national level. In addition, new aquaculture initiatives are often dominated by donor-driven projects instead of local entrepreneurships. This situation does not encourage engagement in aquaculture and thus such activities are outcompeted by other already established sectors (e.g. agriculture and fisheries). We conclude that aquaculture has great potential to evolve due to high environmental capacity. Nevertheless, achieving profitable production and a stronger commitment within local communities, as well as developing effective mariculture governance through support mechanisms and clear strategies to boost the sector at the national level, are essential for sustainable mariculture development in Zanzibar.
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| 3. |
- Luthman, Ola, et al.
(författare)
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Strong and weak sustainability in Nordic aquaculture policies
- 2022
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Ingår i: Aquaculture. - : Elsevier. - 0044-8486 .- 1873-5622. ; 550
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we critically analyze how sustainability is considered in aquaculture policies and strategies using the Nordic countries as a case. The strong versus weak sustainability concepts are used to define and clarify what sustainability aspects are central to each state. To illustrate these concepts further, we draw on and modify four mainstream environmental discourses defined by John Dryzek and apply them to the strong and weak sustainability dichotomy to help categorize how environmental sustainability is portrayed in Nordic aquaculture policies and strategies. Subsequently we apply the characteristics of the concepts to aquaculture and sustainability in the Nordic countries. This allows us to identify each state's depiction of sustainable aquaculture, compare these to one another and assess where the Nordic states position themselves regarding sustainability and aquaculture. Our findings show that the policies emphasize technological advancements, intensification, and economic growth, which correlates with weak sustainability. Environmental sustainability receives a significant role in the documents too but does not seem to trump increased intensification or profitability. All policies are heavily focused on fed aquaculture and in order to reduce negative impacts from aquaculture there is a need to incorporate key elements of strong sustainability in policies, including measures to reduce impacts from pollution and the spread of pathogens, use of high-grade food resources and energy consumption. This to transform the industry to sustainability rather than just making it less unsustainable.
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| 4. |
- Gallardo Fernández, Gloria L.
(författare)
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From Seascapes of Extinction to Seascapes of Confidence : Territorial Use Rights in Fisheries in Chile: El Quisco and Puerto Oscuro
- 2008
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Bok (övrigt vetenskapligt/konstnärligt)abstract
- In Chile, the indiscriminate harvest for export of the edible shellfish, Concholepas concholepas or false abalone, propelled by a neo-liberal market economy during the 1970s, almost led to the extinction of the species, thereby threatening the dependant small-scale artisan fishers’ survival as well as the ecosystem. To reverse this, fishers’ organizations in Chile have adopted the state created regulatory measure, Management and Exploitation Areas for Benthic Resources (MEABR; locally known as Management Areas -- MAs). Replacing the former unsuccessful fishing regulatory measurements, the MEABR regime empowers the fishers with exclusive territorial use rights (TURF) to manage the species, often under commons institutions, thus creating new seascapes of confidence. However, as is often the case with new solutions, emergent problems are posed that threaten to undermine the reform. With the new regulated extraction measure and geographical expansion of this novel labour and production alternative, fishers experience a transition from ‘nomadic’ to sedentary fishing leading to a transformation of their lifestyle and skills. If MAs become permanent, fishing in rural areas may lead to tensions as the fishers settle on coastal lands without entitlement, or are hindered from developing their own fisheries infrastructure. The legal system does not seem to fully foresee the consequences of the reform, and prevailing power relations and private property rights work to disadvantage the fishers. Using a participatory approach for the first research location of El Quisco (Valparaíso Region), and interviews with key informants for the second research location of Puerto Oscuro (Coquimbo Region), fishers’ views of the Chilean TURF were evaluated. How fishers perceive this experience should be central for the success or failure of the MAs as a viable alternative to the earlier conditions of open access. While the assessment of El Quisco deals more with the performance of the MA, Puerto Oscuro is used to portray the seascapes of conflict that have emerged as ownership of the coastal land is contested. The study shows that while the reform has brought better incomes from the benthic resources, the overall economic importance of the MAs for the fishers is reduced relative to the incomes coming from fishing activities realized outside the MAs. Experiences in both cases have been otherwise positive in terms of the recuperation of the species, ecological concerns and strengthening fishers’ so-called soft assets. Nevertheless, many problems remain, among them the problem of access to the sea border and those related to ambiguous land rights to support coastal settlement and fishing infrastructure development.
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| 5. |
- Wallner-Hahn, Sieglind, et al.
(författare)
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Destructive gear use in a tropical fishery : Institutional factors influencing the willingness-and capacity to change
- 2016
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Ingår i: Marine Policy. - : Elsevier BV. - 0308-597X .- 1872-9460. ; 72, s. 199-210
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to empirically assess institutional aspects shaping fishers' behavior leading to unsustainable resource use, by using the example of destructive drag-net fishing in Zanzibar, Tanzania. A broad institutional approach was used to specifically assess institutional factors influencing the fishers' reasons for the current use of destructive drag-nets as well as their willingness- and economic capacity to change to less destructive gears. Different regulative, normative, cultural-cognitive and economic factors (tradition, group-belonging, social acceptance, common practice, identity of drag-net users and weak economic capacity) were identified as critical elements influencing the current use of destructive gears, as well as obstructing changes to other gears. Hence, the importance of addressing all of these factors, matching to the different contexts, rather than focusing on fast-moving regulative measures, is emphasized to increase chances of management success. More promising approaches would be resource allocations to more sustainable fishing gears, well-managed gear exchange programs, as well as alterations of slow-moving normative and cultural factors, e.g. awareness raising on the advantages of more sustainable fishing gears, their traditional and cultural values, information on the actual income they generate, as well as education and an exchange of traditional knowledge on how to use them.
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| 6. |
- Bonow, Madeleine, et al.
(författare)
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Karpfiskarnas tillbakagång i svenskt kosthåll
- 2013
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Ingår i: Från matproduktion till gastronomi. - Huddinge : Södertörns högskola. - 9789197501774 ; , s. 91-114, s. 91-114
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 7. |
- Eggertsen, Linda, 1981-, et al.
(författare)
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Where the grass is greenest in seagrass seascapes depends on life history and simple species traits of fish
- 2022
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Ingår i: Estuarine, Coastal and Shelf Science. - : Academic Press. - 0272-7714 .- 1096-0015. ; 266
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Tidskriftsartikel (refereegranskat)abstract
- Tropical seagrass meadows are critical habitats for many fish species, yet few studies have investigated the influence of multiple scale-dependent factors and marine protected areas on seagrass fish species of differing life histories. We assessed the influence of fine-scale seagrass meadow characteristics and seascape-scale variables on the abundance of fish in a seagrass-dominated seascape in the Bazaruto Archipelago, Mozambique, particularly examining patterns of nursery- vs. resident species as well as mobile- vs. sedentary species. We found that fish distribution patterns in this seagrass-dominated seascape were dependent on species’ life history characteristics; nursery taxa showed lower abundance in seagrass meadows further from adult reef habitats, while resident species within seagrass meadows occurred in higher abundances far from reefs. For taxa utilizing both mangroves and seagrass meadows as nursery habitat, proximity to mangroves was an important factor. Fish abundances were generally influenced by variables at the seascape scale (km), while sedentary species were predominantly influenced by area variables, and smaller seascapes (<500 m in radius) better explained distribution patterns. The influence of marine protected areas was taxon-specific, with the strongest effects of protection on resident species. Our results indicate that protection efforts in seagrass-dominated seascapes can have varying impacts on fish distribution, depending on the life history of the species present, and the geographical placement of the reserve within the seascape. Further, we suggest that simple species attributes can be utilised to describe generalized abundance patterns of fish in seagrass seascapes.
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| 8. |
- Elofsson, Katarina, et al.
(författare)
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The impact of climate information on milk demand : Evidence from a field experiment
- 2016
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Ingår i: Food Policy. - : Elsevier BV. - 0306-9192 .- 1873-5657. ; 58, s. 14-23
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Tidskriftsartikel (refereegranskat)abstract
- It has been suggested that carbon labelling of food, on voluntary or non-voluntary basis, could reduce emissions of greenhouse gases. However, there is limited empirical evidence on the influence of such labels on consumer purchases. The purpose of this study was to investigate whether voluntary carbon labelling affects the demand for milk. A randomized field experiment was conducted in 17 retail stores in Sweden, where a sign provided consumers with qualitative information about the carbon impact of climate-certified milk. The results suggest that the sign increased the demand for the climate-certified milk by approximately 6-8%, and the result is robust to alternative model specifications. The effect is entirely driven by large stores, such as supermarkets. We find no statistically significant impact on total milk sales, and the dataset is too small to verify the consequences for other milk brands. The effect on the demand for the labelled milk is short-lived.
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| 9. |
- Gallardo Fernández, Gloria L., 1953-
(författare)
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Communal Land Ownership: Remnant of the Past? : The agricultural communities in the Commune of Canela, Norte Chico (1600-1998)
- 2002
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Bok (övrigt vetenskapligt/konstnärligt)abstract
- Other land property forms than the private are often conceived as residues of the past, residues that paradoxically seem never to pass away. An example is the form of semi-communal land ownership of the agricultural communities of Chile’s Region IV. Using sociological and historical research methods, this study explores the origin and the emergence of this agrarian form during the last four centuries, through the community Canela Baja and the neighbouring latifundium El Totoral, as a contrasting case. Having on one hand, the form of communal land as the common denominator, we have on the other the social aspects resulting from particular histories of the form. Therefore, a distinction between imposed and spontaneous forms is introduced. Confronting the case study with research results from other socio-political and material conditions, the study suggest that while some of the present communal ownership forms are the outcome of political decisions, others are of long historical processes. The imposed forms are not so much communities; rather reserves or homelands. Differentiating it from both private property and the so called “tragedy of the commons“, communal land ownership is conceived as an institution of its own which in Chile shares the same historical origin in colonial land grants as private property. Since they have kept their territorial integrity permanently in an undivided form, the study suggest that these agrarian collectives have historically avoided their conversion into minifundium, being thus a resource management solution, which acted as a brake to land fragmentation. Thus, the communal form represents not only another historical pattern of development, but also another way of organising ownership and production than both the latifundium and minifundium.
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| 10. |
- Gustafsson, Kerstin, et al.
(författare)
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Direct and indirect effects of the fungicide azoxystrobin in outdoor brackish water microcosms
- 2010
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Ingår i: Ecotoxicology. - : Springer Science and Business Media LLC. - 0963-9292 .- 1573-3017. ; 19:2, s. 431-444
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Tidskriftsartikel (refereegranskat)abstract
- The effects of the strobilurin fungicide azoxystrobin were studied in brackish water microcosms, with natural plankton communities and sediment. Two experiments were conducted: Experiment 1 (nominal conc. 0, 15 and 60 mu g/L, 24-L outdoor microcosms for 21 days) and a second, follow-up, Experiment 2 (nominal conc. 0, 3, 7.5, 15 mu g/L, 4-L indoor microcosms for 12 days). The microcosms represent a simplified brackish water community found in shallow semi-enclosed coastal areas in agricultural districts in the Baltic Sea region. Measured water concentrations of the fungicide (Experiment 1) were, on average, 83 and 62% of nominal concentrations directly after application, and 25 and 30% after 21 days, for the low and high dose treatments, respectively, corresponding to mean DT50-values of 15.1 and 25.8 days, for low and high dose treatments, respectively. In Experiment 1, direct toxic effects on calanoid copepods at both test concentrations were observed. Similarly, in Experiment 2, the copepod abundance was significantly reduced at all tested concentrations. There were also significant secondary effects on zooplankton and phytoplankton community structure, standing stocks and primary production. Very few ecotoxicological studies have investigated effects of plant protection products on Baltic organisms in general and effects on community structure and function specifically. Our results show that azoxystrobin is toxic to brackish water copepods at considerably lower concentrations than previously reported from single species tests on freshwater crustaceans, and that direct toxic effects on this ecologically important group may lead to cascade effects altering lower food webs and ecosystem functioning.
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