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  • 1
    Online Resource
    Online Resource
    ORBITAL PARAMAGNETISM IN METALLIC SYSTEMS WITH LARGE ANGULAR MOMENTA
    World Scientific Pub Co Pte Ltd ; 1995
    In:  International Journal of Modern Physics B Vol. 09, No. 21 ( 1995-09-30), p. 2735-2751
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 09, No. 21 ( 1995-09-30), p. 2735-2751
    Abstract: We demonstrate that the field induced spin and orbital moments in paramagnetic metals in general are parallel, since the Zeeman energy overcomes the spin-orbit energy that is in favor of an antiparallel arrangement when the electronic shell is less than half-filled. In the early actinides, however, the spin-orbit energy becomes sufficiently strong to approach the border where the moments can couple antiparallel. This results in peculiar magnetic states for α-Pu and some uranium compounds, where the spin moments are antiparallel to the applied field and the magnetic response dominated by the orbital character, and consequently these systems display unusual spin densities and magnetic form factors.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979295001026
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 1995
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  • 2
    Online Resource
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    Functional link between foraging performance, functional morphology, and diet shift in roach ( Rutilus rutilus )
    Canadian Science Publishing ; 2003
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 60, No. 6 ( 2003-06-01), p. 700-709
    Details
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 60, No. 6 ( 2003-06-01), p. 700-709
    Abstract: This study explores how feeding performance (size-dependent attack rate) and the diet shift from zooplankton to benthic macroinvertebrates in the fish species roach (Rutilus rutilus L.) is related to changes in functional morphology over ontogeny. The morphological changes included overall body shape and structures of the feeding apparatus. The foraging performance of roach on zooplankton, as a function of size, was hump-shaped with a maximum of ~160 mm, and the diet shift took place around 150 mm. Over ontogeny, roach body shape gradually changed from fusiform into high-bodied. The second principal component (PC2) of the feeding apparatus had a U-shaped relationship with body size, with a minimum at 140-mm total length, which is the inverse of that found for the foraging performance on zooplankton. We suggest that changes of the feeding apparatus affect prey intake during the early zooplanktivorous phases and at the final benthivorous feeding stage, whereas prey retention ability limits the maximum intake rate at a later phase of the zooplanktivorous feeding stage. Our results also suggest the presence of both positive and negative correlations in morphology between the feeding niches, which point to the occurrence of morphological trade-offs within ontogenetic niches.
    Type of Medium: Online Resource
    ISSN: 0706-652X , 1205-7533
    URL: Article
    DOI: 10.1139/f03-058
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2003
    detail.hit.zdb_id: 7966-2
    detail.hit.zdb_id: 1473089-3
    SSG: 21,3
    SSG: 12
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  • 3
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    A no-take zone and partially protected areas are not enough to save the Kattegat cod, but enhance biomass and abundance of the local fish assemblage
    Oxford University Press (OUP) ; 2022
    In:  ICES Journal of Marine Science Vol. 79, No. 8 ( 2022-10-26), p. 2231-2246
    Details
    In: ICES Journal of Marine Science, Oxford University Press (OUP), Vol. 79, No. 8 ( 2022-10-26), p. 2231-2246
    Abstract: To supplement catch and effort regulations with the purpose to rebuild the cod (Gadus morhua) stock in Kattegat, Sweden and Denmark established a large (426 km2) year-round no-take zone (NTZ) surrounded by partially protected areas (PPAs) in 2009. The purpose of these spatial regulations was to prohibit cod fishing on the spawning grounds and to displace fisheries bycatch of cod from areas where mature cod aggregate in the Kattegat. The aim of this study is to evaluate the effects of the established NTZ and PPAs on the local fish assemblage, including cod. Based on a spatially high-resolution bottom trawl survey in the Kattegat (covering 2008–2021), multivariate analyses revealed significant shifts in the fish assemblage. A closer analysis indicated that six to seven fish species, including cod increased in the NTZ relative to control areas depending on if abundance or biomass was used as dependent variable. Univariate analysis showed that two flatfish species dab (Limanda limanda) and lemon sole (Microstomus kitt), and Norway lobster (Nephrops norvegicus) significantly increased in biomass in the NTZ, and turbot (Scophthalmus maximus) in the PPA relative to the control areas. These results suggest that the NTZ protected even relatively mobile species in an open sea system, such as the Kattegat. However, neither cod abundance nor biomass showed a significant increase as an effect of the NTZ and PPA despite two relatively strong year classes in 2012 and 2013, which possibly would have helped the recovery of the cod stock. As assessed by the International Council for the Exploration of the Sea in 2022, Kattegat cod continuously suffer from being severely overfished with low recruitment, and high discard rates in the mixed N. norvegicus fishery, is considered the major driver behind the reinforced depletion of the stock.
    Type of Medium: Online Resource
    ISSN: 1054-3139 , 1095-9289
    URL: Article
    DOI: 10.1093/icesjms/fsac152
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2022
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    detail.hit.zdb_id: 29056-7
    SSG: 12
    SSG: 21,3
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  • 4
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    Which factors can affect the productivity and dynamics of cod stocks in the Baltic Sea, Kattegat and Skagerrak?
    Elsevier BV ; 2022
    In:  Ocean & Coastal Management Vol. 223 ( 2022-05), p. 106154-
    Details
    In: Ocean & Coastal Management, Elsevier BV, Vol. 223 ( 2022-05), p. 106154-
    Type of Medium: Online Resource
    ISSN: 0964-5691
    URL: Article
    DOI: 10.1016/j.ocecoaman.2022.106154
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 1109890-9
    detail.hit.zdb_id: 1497382-0
    SSG: 21,3
    SSG: 14
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  • 5
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    Inter‐annual variation in herring, Clupea harengus , and sprat, Sprattus sprattus , condition in the central Baltic Sea: what gives the tune?
    Wiley ; 2006
    In:  Oikos Vol. 112, No. 3 ( 2006-03), p. 638-650
    Details
    In: Oikos, Wiley, Vol. 112, No. 3 ( 2006-03), p. 638-650
    Abstract: The Baltic Sea ecosystem has undergone large changes during the last two decades, including a severe reduction in cod and herring biomass but, at the same time, a large increase in sprat abundance. The lower trophic levels of the Baltic Sea also changed due to environmental fluctuations, including variations in salinity and in volume of oxygenated water. In this apparently shifting environment, the conditions of herring and sprat have undergone large inter‐annual variations during the past 15–20 years. In this study, we explore how abiotic factors (i.e. salinity and temperature) and biotic factors (biomass of the copepods Pseudocalanus elongatus , Temora longicornis , Acartia spp. and of cladocerans as well as clupeid abundance) in different seasons (May and August) affect clupeid body condition. Our analyses suggest that data of zooplankton biomass and abiotic factors in August have higher predictive power than May data. Although our analysis suggests that salinity (a bottom‐up process) has an effect on sprat condition, total abundance of clupeids (a top‐down process) is by far the most significant predictor of both herring and sprat condition. The strong correlation between clupeid abundance and total zooplankton biomass points to food competition and to top‐down control by herring and sprat on common food resources. Furthermore, clupeid condition co‐varied with the changes in the weight of zooplankton in the stomachs, which further suggest food competition being the main mechanism behind the changes in clupeid condition during the last two decades. Hence, our results are not in agreement with most of the current literature that has suggested that clupeid growth is regulated by environmentally mediated bottom‐up processes acting on the abundance of copepods. This is, to our knowledge, the first evidence of food resources mediated density‐dependent fish growth in a large marine ecosystem.
    Type of Medium: Online Resource
    ISSN: 0030-1299 , 1600-0706
    URL: Issue
    URL: Article
    DOI: 10.1111/oik.2006.112.issue-3
    DOI: 10.1111/j.0030-1299.2006.13860.x
    Language: English
    Publisher: Wiley
    Publication Date: 2006
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    detail.hit.zdb_id: 207359-6
    SSG: 12
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  • 6
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    Temporal variation in feeding morphology and size–structured population dynamics in fishes
    The Royal Society ; 2003
    In:  Proceedings of the Royal Society of London. Series B: Biological Sciences Vol. 270, No. 1522 ( 2003-07-07), p. 1407-1412
    Details
    In: Proceedings of the Royal Society of London. Series B: Biological Sciences, The Royal Society, Vol. 270, No. 1522 ( 2003-07-07), p. 1407-1412
    Type of Medium: Online Resource
    ISSN: 0962-8452 , 1471-2954
    URL: Article
    DOI: 10.1098/rspb.2003.2376
    Language: English
    Publisher: The Royal Society
    Publication Date: 2003
    detail.hit.zdb_id: 1460975-7
    SSG: 12
    SSG: 25
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  • 7
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    Fishing through time: population dynamics of plaice ( Pleuronectes platessa ) in the Kattegat–Skagerrak over a century
    Wiley ; 2010
    In:  Population Ecology Vol. 52, No. 2 ( 2010-04), p. 251-262
    Details
    In: Population Ecology, Wiley, Vol. 52, No. 2 ( 2010-04), p. 251-262
    Abstract: Over the past century, advances in technology and historical events such as climate change have resulted in significant changes in the exploitation pattern, population sizes and the potential yield of fish stocks. These variations provide contrast in the data that improves our knowledge on population dynamics and our ability to develop management strategies for long‐term sustainable exploitation. In this study, we use a standardized scientific trawl survey to obtain a historical time series (1901–2007) of relative abundance, recruitment and size structure for plaice in the Kattegat–Skagerrak. Our work extends the available time series by more than 80 years so that the evaluation of trends is more informative than is possible from the current assessment. We show that the current adult biomass is approximately 40% of the maximum observed at the beginning of the century and during the 1960s. The average maximum individual length has been reduced by 10 cm over the studied time period. An analysis of trends in mean length indicates that fishing mortality was variable during the first half of the century and has increased steadily over the past 20 years. Recruitment has been the highest on record during recent years, suggesting that the alleged link between coastal environmental degradation and juvenile survival is of low importance. The overall findings of our work will provide managers with a historical perspective on the population dynamics of the stock, which will support the long‐term management of plaice in the Kattegat–Skagerrak.
    Type of Medium: Online Resource
    ISSN: 1438-3896 , 1438-390X
    URL: Article
    DOI: 10.1007/s10144-009-0177-x
    Language: English
    Publisher: Wiley
    Publication Date: 2010
    detail.hit.zdb_id: 1474902-6
    SSG: 12
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  • 8
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    Trends in cpue and related changes in spatial distribution of demersal fish species in the Kattegat and Skagerrak, eastern North Sea, between 1981 and 2003
    Oxford University Press (OUP) ; 2005
    In:  ICES Journal of Marine Science Vol. 62, No. 4 ( 2005-01-01), p. 671-682
    Details
    In: ICES Journal of Marine Science, Oxford University Press (OUP), Vol. 62, No. 4 ( 2005-01-01), p. 671-682
    Abstract: We explored the trends in ln-transformed catch per unit effort, defined as average weight (kg) per 1 h trawling, and the spatial distribution of 32 demersal fish species in the Kattegat and Skagerrak using International Bottom Trawl Survey data collected between 1981 and 2003. As in other areas, the biomass of roundfish species such as cod, pollack, hake, and ling drastically decreased during this period most likely owing to fishing pressure. However, other commercially important fish species, e.g. haddock, whiting, and some flatfish, showed a constant or increasing trend during the same period. Non-commercial species showed no or an increasing trend in ln-cpue, by as much as 40 times in hagfish. Furthermore, analyses of the spatial distribution of 14 selected fish species by means of distribution maps of ln-cpue suggested that fish stocks contracted and expanded in response to decrease and increase of the stock biomass, respectively, with some flatfish species (i.e. plaice and flounder) and hagfish representing the exceptions to this general pattern.
    Type of Medium: Online Resource
    ISSN: 1095-9289 , 1054-3139
    URL: Article
    DOI: 10.1016/j.icesjms.2004.12.018
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2005
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    detail.hit.zdb_id: 1468003-8
    detail.hit.zdb_id: 29056-7
    SSG: 12
    SSG: 21,3
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  • 9
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    Comments on Local cod (Gadus morhua) revealed by egg surveys and population genetic analysis after longstanding depletion on the Swedish Skagerrak Coast by Svedäng et al.
    Oxford University Press (OUP) ; 2019
    In:  ICES Journal of Marine Science Vol. 76, No. 4 ( 2019-07-01), p. 1209-1211
    Details
    In: ICES Journal of Marine Science, Oxford University Press (OUP), Vol. 76, No. 4 ( 2019-07-01), p. 1209-1211
    Abstract: Svedäng et al. (2018) concluded that “the occurrence of locally spawned cod eggs suggests that spawning on the Swedish Skagerrak coast takes place, which belong to either a coastal subpopulation that is a remnant stock of a once much larger cod population, or a newly formed subpopulation that is now successfully inhabiting the coastal ecosystems along the Swedish Skagerrak coast”. However, after carefully reviewing the results and the data presented by the authors, we were no longer convinced that the information presented provided enough evidence for a local, distinct, coastal cod population in the Swedish Skagerrak. Thus, we requested the original genotype data, which the authors kindly provided to us. This allowed us to explore the substructure of these samples further using STRUCTURE 2.3.2. Re-analysis of the data consistently rejects the existence of an independent coastal Swedish stock in contrast with Svedäng et al. (2018) conclusions. We acknowledge the observation of cod spawning in the area but, based on re-analysis of the original genetic data of Svedäng et al. (2018), we currently lack the scientific basis to assume the existence of established local stocks, and even less the demographic expansion of an older, relict population in the area.
    Type of Medium: Online Resource
    ISSN: 1054-3139 , 1095-9289
    URL: Article
    DOI: 10.1093/icesjms/fsz095
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2019
    detail.hit.zdb_id: 2463178-4
    detail.hit.zdb_id: 1468003-8
    detail.hit.zdb_id: 29056-7
    SSG: 12
    SSG: 21,3
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  • 10
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    Sustainability Jam Sessions for vision creation and problem solving
    Elsevier BV ; 2015
    In:  Journal of Cleaner Production Vol. 98 ( 2015-07), p. 29-35
    Details
    In: Journal of Cleaner Production, Elsevier BV, Vol. 98 ( 2015-07), p. 29-35
    Type of Medium: Online Resource
    ISSN: 0959-6526
    URL: Article
    DOI: 10.1016/j.jclepro.2014.10.041
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2015
    detail.hit.zdb_id: 1179393-4
    detail.hit.zdb_id: 2029338-0
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