Publications
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Amelineau, Francoise; Merkel, Benjamin; Tarroux, Arnaud; Descamps, Sebastien; Anker-Nilssen, Tycho & Bjørnstad, Oskar Kenneth
[Show all 41 contributors for this article]
(2021).
Six pelagic seabird species of the North Atlantic engage in a fly-and-forage strategy during their migratory movements.
Marine Ecology Progress Series.
ISSN 0171-8630.
676,
p. 127–144.
doi:
10.3354/meps13872.
Full text in Research Archive
Show summary
Bird migration is commonly defined as a seasonal movement between breeding and non-breeding grounds. It generally involves relatively straight and directed large-scale movements, with a latitudinal change, and specific daily activity patterns comprising less or no foraging and more traveling time. Our main objective was to describe how this general definition applies to seabirds. We investigated migration characteristics of 6 pelagic seabird species (little auk Alle alle, Atlantic puffin Fratercula arctica, common guillemot Uria aalge, Brünnich’s guillemot U. lomvia, black-legged kittiwake Rissa tridactyla and northern fulmars Fulmarus glacialis). We analysed an extensive geolocator positional and saltwater immersion dataset from 29 colonies in the North-East Atlantic and across several years (2008-2019). We used a novel method to identify active migration periods based on segmentation of time series of track characteristics (latitude, longitude, net-squared displacement). Additionally, we used the saltwater immersion data of geolocators to infer bird activity. We found that the 6 species had, on average, 3 to 4 migration periods and 2 to 3 distinct stationary areas during the non-breeding season. On average, seabirds spent the winter at lower latitudes than their breeding colonies and followed specific migration routes rather than non-directionally dispersing from their colonies. Differences in daily activity patterns were small between migratory and stationary periods, suggesting that all species continued to forage and rest while migrating, engaging in a ‘fly-and-forage’ migratory strategy. We thereby demonstrate the importance of habitats visited during seabird migrations as those that are not just flown over, but which may be important for re-fuelling.
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Dupuis, Benjamin; Amelineau, Francoise; Tarroux, Arnaud; Bjørnstad, Oskar; Bråthen, Vegard Sandøy & Danielsen, Jóhannis
[Show all 18 contributors for this article]
(2021).
Light-level geolocators reveal spatial variations in interactions between northern fulmars and fisheries.
Marine Ecology Progress Series.
ISSN 0171-8630.
676,
p. 159–172.
doi:
10.3354/meps13673.
Full text in Research Archive
Show summary
Seabird-fishery interactions are a common phenomenon of conservation concern. Here, we highlight how light-level geolocators provide promising opportunities to study these interactions. By examining raw light data, it is possible to detect encounters with artificial lights at night, while conductivity data give insight on seabird behaviour during encounters. We used geolocator data from 336 northern fulmars Fulmarus glacialis tracked from 12 colonies in the North-East Atlantic and Barents Sea during the non-breeding season to (1) confirm that detections of artificial lights correspond to encounters with fishing vessels by comparing overlap between fishing effort and both the position of detections and the activity of birds during encounters, (2) assess spatial differences in the number of encounters among wintering areas and (3) test whether some individuals forage around fishing vessels more often than others. Most (88.1%) of the tracks encountered artificial light at least once, with 9.5 ± 0.4 (SE) detections on average per 6 mo non-breeding season. Encounters occurred more frequently where fishing effort was high, and birds from some colonies had higher probabilities of encountering lights at night. During encounters, fulmars spent more time foraging and less time resting, strongly suggesting that artificial lights reflect the activity of birds around fishing vessels. Inter-individual variability in the probability of encountering light was high (range: 0-68 encounters per 6 mo non-breeding season), meaning that some individuals were more often associated with fishing vessels than others, independently of their colony of origin. Our study highlights the potential of geolocators to study seabird-fishery interactions at a large scale and a low cost.
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Knudtzon, Nina C; Thorstensen, Helene; Ruus, Anders; Helberg, Morten; Bæk, Kine & Enge, Ellen Katrin
[Show all 7 contributors for this article]
(2021).
Maternal transfer and occurrence of siloxanes, chlorinated paraffins, metals, PFAS and legacy POPs in herring gulls (Larus argentatus) of different urban influence.
Environment International.
ISSN 0160-4120.
152.
doi:
10.1016/j.envint.2021.106478.
Full text in Research Archive
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Urban herring gulls (Larus argentatus) are exposed to contaminants from aquatic, terrestrial and anthropogenic sources. We aim to assess if differences in urbanisation affect ecological niche and contaminant concentrations in female herring gulls. Furthermore, we investigated maternal transfer from mothers to eggs for all the target compounds, including chlorinated paraffins (CPs) and cyclic volatile methyl siloxane (cVMSs), which to our knowledge have not been assessed in herring gulls previously. We compare concentrations of legacy and emerging contaminants and metals in blood and eggs between two herring gull colonies located 51 km apart, in the urban influenced Norwegian Oslofjord. While both colonies are within an urbanised area, the inner fjord is more so, as it is surrounded by Oslo, the capital and largest city in Norway Stable isotopes of carbon and nitrogen indicated a more marine ecological niche in the outer than the inner fjord colony, although with overlap. Persistent organic pollutant (POP) concentrations were similar in the inner and outer fjord colonies, while the short-chained chlorinated paraffins (SCCP), which are recently added to the Stockholm convention and contaminants of emerging concern (CECs) varied, with higher concentrations of SCCP and the cVMS decamethylcyclopentasiloxane (D5) in females and eggs of the inner fjord colony. Per- and polyfluorinated substances (PFAS) concentrations were higher in the outer fjord colony, likely linked to releases from a point-source (airport and waste management facility with open access to food waste). In blood, chlorinated paraffins contributed most the total lipophilic contaminants (inner: 78%, outer: 56%), while polychlorinated biphenyls (PCBs) were the most abundant lipophilic contaminants in eggs (inner: 62%, outer: 46%). Dechloranes and brominated flame retardants (BFRs) were detected in few samples. Maternal transfer, assessed by egg to blood ratios, of cVMSs were similar to the POPs with mean log ratio 0.39 (D5), while it was lower for SCCPs, with log ratios-0.77. Our results indicate comparable POP exposure of the herring gulls in the inner and outer Oslofjord, likely due to overlap in ecological niches between the colonies and wide distribution of POPs. The differences between the colonies in concentrations of PFAS, cVMS and CPs shows that point source exposures and urban influence may be more important than ecological niche for these compounds.
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Bustnes, Jan Ove; Bårdsen, Bård-Jørgen & Helberg, Morten
(2020).
Lesser Black-backed Gulls (Larus fuscus fuscus) were studied over 10 breeding seasons (2005-2014) to assess factors influencing nesting distribution among 7 subcolonies with two distinct habitats (open-rocky or vegetated) in an archipelago on the Norwegian Coast. The study was divided into an early (2005-2008) and late period (2009-2014), depending on a predatory event in 2008, where one subcolony suffered a complete reproductive failure. In the early period, three open-rocky subcolonies in the .
Waterbirds (De Leon Springs, Fla.).
ISSN 1524-4695.
43(2),
p. 163–173.
doi:
10.1675/063.043.0204.
Show summary
Lesser Black-backed Gulls (Larus fuscus fuscus) were studied over 10 breeding seasons (2005-2014) to assess factors influencing nesting distribution among 7 subcolonies with two distinct habitats (open-rocky or vegetated) in an archipelago on the Norwegian Coast. The study was divided into an early (2005-2008) and late period (2009-2014), depending on a predatory event in 2008, where one subcolony suffered a complete reproductive failure. In the early period, three open-rocky subcolonies in the periphery appeared to contain birds of higher quality (assessed by stability in number of pairs among years, reproductive timing, clutch size, and chick production) compared to a large vegetated subcolony. In the late period, the proportion of the population nesting in the large vegetated subcolony increased, as did the quality of individuals, a result of birds from the depredated subcolony settling there. In subcolonies not subject to complete reproductive failure, philopatry to natal subcolonies was high among juveniles (∼80%), and the rate of among-year change between subcolonies by adult breeders was as low as 0-3%, although the rate of change increased up to ∼15% following years of poor reproductive success. However, there was no evidence that either habitat consistently offered better nest protection and reproductive success than the other.
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Thorstensen, Helene; Ruus, Anders; Helberg, Morten; Bæk, Kine; Enge, Ellen Katrin & Borgå, Katrine
(2020).
Common Eider and Herring Gull as Contaminant Indicators of Different Ecological Niches of an Urban Fjord System.
Integrated Environmental Assessment and Management.
ISSN 1551-3777.
17,
p. 422–433.
doi:
10.1002/ieam.4340.
Full text in Research Archive
Show summary
Seabirds like gulls are common indicators in contaminant monitoring. The herring gull (Larus argentatus) is a generalist with a broad range of dietary sources, possibly introducing a weakness in its representativeness of aquatic contamination. To investigate the herring gull as an indicator of contamination in an urban‐influenced fjord, the Norwegian Oslofjord, we compared concentrations of a range of lipophilic and protein‐associated organohalogen contaminants (OHCs), Hg, and dietary markers in blood (n = 15), and eggs (n = 15) between the herring gull and the strict marine‐feeding common eider (Somateria mollissima) in the breeding period of May 2017. Dietary markers showed that the herring gull was less representative of the marine food web than the common eider. We found higher concentrations of lipophilic OHCs (wet weight and lipid weight) and Hg (dry weight) in the blood of common eider (mean ± SE ∑PCB = 210 ± 126 ng/g ww, 60 600 ± 28 300 ng/g lw; mean Hg = 4.94 ± 0.438 ng/g dw) than of the herring gull (mean ± SE ∑PCB = 19.0 ± 15.6 ng/g ww, 1210 ± 1510 ng/g lw; mean Hg = 4.26 ± 0.438 ng/g dw). Eggs gave opposite results; higher wet weight and lipid weight OHC concentrations in the herring gull (mean ± SE ∑PCB = 257 ± 203 ng/g ww, 3240 ± 2610 ng/g lw) than the common eider (mean ± SE ∑PCB = 18.2 ± 20.8 ng/g ww, 101 ± 121 ng/g lw), resulting in higher OHC maternal transfer ratios in gulls than eiders. We suggest that the matrix differences are due to fasting during incubation in the common eider. We suggest that in urban areas, herring gull might not be representative as an indicator of marine contamination but rather urban contaminant exposure. The common eider is a better indicator of marine pollution in the Oslofjord. The results are influenced by the matrix choice, as breeding strategy affects lipid dynamics regarding the transfer of lipids and contaminants to eggs and remobilization of contaminants from lipids to blood during incubation, when blood is drawn from the mother. Our results illustrate the benefit of a multispecies approach for a thorough picture of contaminant status in urban marine ecosystems. Integr Environ Assess Manag 2020;00:1–12. © 2020 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals LLC on behalf of Society of Environmental Toxicology & Chemistry (SETAC)
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Nilsson, Anna; Slagsvold, Tore; Røstad, Ole Wiggo; Knudsen, Endre; Jerstad, Kurt & Cadahia, Luis
[Show all 10 contributors for this article]
(2019).
Territory location and quality, together with climate, affect the timing of breeding in the white-throated dipper.
Scientific Reports.
ISSN 2045-2322.
9,
p. 1–11.
doi:
10.1038/s41598-019-43792-5.
Full text in Research Archive
Show summary
Recent climate change has led to advanced spring phenology in many temperate regions. The
phenological response to variation in the local environment, such as the habitat characteristics of the
territories birds occupy, is less clear. The aim of this study is to understand how ecological conditions
affect breeding time, and its consequences for reproduction, in a white-throated dipper Cinclus cinclus
population in a river system in Norway during 34 years (1978–2011). Hatching date advanced almost
nine days, indicating a response to higher temperatures and the advanced phenology in the area. Earlier
breeding was found in warm springs and at lower altitudes. High population density facilitated earlier
breeding close to the coast. Furthermore, when population density was low, breeding was early at
territories that were rarely occupied, while in years with high density, breeding was early at territories
that were frequently occupied. Also, when population density was low, earlier breeding occurred at
territories that on average produced more offspring than other territories, while there was no difference
in breeding time in high population years. Selection for early breeding was dependent on spring
temperatures and high spring temperatures contributed to higher breeding success during the study
period. We found that breeding phenology may have strong effects on fitness in the white-throated
dipper, and thus that breeding time is an important ecological factor in a species that feeds mainly on
aquatic rather than terrestrial prey.
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Bustnes, Jan Ove; Moe, Børge; Helberg, Morten & Phillips, Richard A.
(2013).
Rapid long-distance migration in Norwegian Lesser Black-backed Gulls Larus fuscus fuscus along their eastern flyway.
IBIS.
ISSN 0019-1019.
155(2),
p. 402–406.
doi:
10.1111/ibi.12022.
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Helberg, Morten; Systad, Geir Helge; Birkeland, Ingve; Lorentzen, Nils H. & Bustnes, Jan Ove
(2009).
Migration patterns of adult and juvenile Lesser Black-backed Gulls Larus fuscus from northern Norway.
Ardea.
ISSN 0373-2266.
97(3),
p. 281–286.
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Bustnes, Jan Ove; Fauchald, Per; Tveraa, Torkild; Helberg, Morten & Skåre, Janneche Utne
(2008).
The potential impact of environmental variation on the concentrations and ecological effects of pollutants in a marine avian top predator.
Environment International.
ISSN 0160-4120.
34,
p. 193–201.
Show summary
Concentrations of organochlorine contaminants (OCs) and associations between OCs and fitness components were examined in great blackbacked gulls (Larus marinus) in three colonies along the coast of northern Norway. In one of the colonies, data were collected in two subsequent seasons. Concentrations of four OCs (HCB, oxychlordane, DDE and PCB) were measured in blood (n=260) and fitness components (reproductive variables and adult return rate between breeding seasons) were recorded. In the first year, in two of the colonies, body condition and reproductive performance among the gulls were poor compared to the third colony, suggesting spatial variation in environmental conditions, especially food availability. However, in the third colony, body condition and reproductive performance were even better in the second season; i.e. environmental conditions varied temporally. OC residues were higher in the colonies where environmental conditions were poor, but much of this variation was explained by differences in body condition among colonies. Moreover, concurrent with improved body condition from one season to the next, the concentrations of OCs were halved. In the two colonies where environmental conditions were poor, female OC residues were negatively related to egg-laying date, egg size and nesting success, and in the colony where the concentrations of OC were highest, gulls with elevated DDE residues had low probability of returning between breeding seasons. In comparison, in the colony where environmental conditions were better in the first year, other types of adverse relationships between OCs and fitness components were found; i.e. chicks from females with high OC concentrations were in poor condition at hatching, suggesting maternal transfer of OCs to the eggs, and males with high OC residues had poor nesting success and chick survival, suggesting OC-mediated behavioural changes. With improved environmental conditions and lower OC concentrations in the second season, no significant adverse relationships between OCs and fitness components were found. This study thus suggests that there are complex interrelationships between both concentrations and ecological effects of OCs, and the environment, indicating that effects of OCs in nature may only be assessed after considering environmental variation.
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Bustnes, Jan Ove; Helberg, Morten; Strann, Karl-Birger & Skåre, Janneche Utne
(2006).
Environmental pollutants in endangered vs. increasing subspecies of the lesser black-backed gull on the Norwegian Coast.
Environmental Pollution (1987).
ISSN 0269-7491.
144,
p. 893–901.
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Kristiansen, Kai-Ove; Bustnes, JO; Folstad, Ivar & Helberg, Morten
(2006).
Carotenoid coloration in great black-backed gull Larus marinus reflects individual quality.
Journal of Avian Biology.
ISSN 0908-8857.
37.
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Helberg, Morten; Bustnes, Jan Ove; Erikstad, K. E.; Kristiansen, Kai Ove & Skåre, Janneche Utne
(2005).
Relationships between reproductive performance and organochlorine contaminants in great black-backed gulls (Larus marinus).
Environmental Pollution (1987).
ISSN 0269-7491.
134(3),
p. 475–483.
View all works in Cristin
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Braaten, Espen; Eikeseth, Unni; Helberg, Morten; Lesund, Brit Drøivoldsmo & Voll, Liv Oddrun
(2021).
Solaris naturfag 6.
Aschehoug & Co.
ISBN 9788203406607.
272 p.
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Svorkmo-Lundberg, Torkild; Bakken, Vidar; Helberg, Morten; Mork, Kjetil; Røer, Jan Erik & Sæbø, Solve
(2006).
Norsk VinterfuglAtlas : Fuglenes utbredelse, bestandsstørrelse og økologi vinterstid.
Norsk Ornitologisk Forening.
ISBN 8278520739.
496 p.
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Svorkmo-Lundberg, Torkild; Bakken, Vidar; Helberg, Morten; Mork, Kjetil; Røer, Jan Erik & Sæbø, Solve
(2006).
Norsk VinterfuglAtlas : Fuglenes utbredelse, bestandsstørrelse og økologi vinterstid.
Norsk Ornitologisk Forening.
ISBN 978-82-7852-073-4.
496 p.
View all works in Cristin
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Tarroux, Arnaud; Amelineau, Francoise; Anker-Nilssen, Tycho; Bjørnstad, Oskar; Bringsvor, Ingar Støyle & Bråthen, Vegard Sandøy
[Show all 44 contributors for this article]
(2021).
Year-round exposure of pelagic Arctic-breeding seabirds to fisheries and other anthropogenic stressors in the Northeast Atlantic.
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Knudtzon, Nina Cathrine; Thorstensen, Helene; Ruus, Anders; Helberg, Morten; Bæk, Kine & Enge, Ellen Katrin
[Show all 7 contributors for this article]
(2021).
Maternal Transfer and Occurrence of Siloxanes, Chlorinated Paraffins and Legacy POPs in Herring Gulls (Larus argentatus) of Different Urban Influence.
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Gudmundsson, Sveinn H; Madslien, Knut Ivar Engesæter; Rømo, Grim; Gjerset, Britt; Moldal, Torfinn & Follestad, Arne
[Show all 8 contributors for this article]
(2021).
Høypatogen fugleinfluensa påvist i Norge.
Norsk Veterinærtidsskrift.
ISSN 0332-5741.
p. 140–142.
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Ruus, Anders; Helberg, Morten; Knudtzon, Nina Cathrine; Bæk, Kine; Enge, Ellen Katrin & Borgå, Katrine
(2020).
Emerging and legacy contaminants in two urban herring gull colonies.
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Ruus, Anders; Helberg, Morten; Bæk, Kine; Enge, Ellen Katrin & Borgå, Katrine
(2020).
Common eider and herring gull as indicators of contaminants in an urban fjord system.
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Thorstensen, H. S.; Ruus, Anders; Helberg, Morten; Bæk, Kine; Enge, Ellen Katrin & Borgå, Katrine
(2020).
Herring gull and common eider as indicators of contaminants in an urban fjord.
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Båtvik, Jan Ingar Iversen & Helberg, Morten
(2019).
An der Eismeerküste – Norwegens frostiger Norden.
[TV].
MareTV.
Show summary
TV-selskapet filmet en del av aktivitetene fra nordområdene også i Vardø og Kiberg havn i Øst-Finnmark. Her fanget Morten Helberg ei krykkje som ble ringmerket og vist fram for en skoleklasse i Vardø. Jan Ingar Båtvik fanget en stellerand i Kiberg for blodprøvetaking og ringmerking og hvor TV-selskapet var og filmet. De fikk en orientering om hva vi holdt på med, litt om stellerand og dens krav til tilværelsen før frislippet av denne.
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Baggott, Carl David & Helberg, Morten
(2018).
Breeding ‘Baltic Gulls’ from the Horsvær archipelago in Norway and the occurrence of such birds in Britain.
British Birds.
ISSN 0007-0335.
111,
p. 499–511.
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Keilen, Ellen Kristine; Borgå, Katrine; Ruus, Anders; Helberg, Morten; Reiertsen, Tone & Warner, Nicholas Alexander
[Show all 7 contributors for this article]
(2017).
Levels and effects of environmental contaminants in herring gull (Larus argentatus) from an urban and a rural colony in Norway.
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Helberg, Morten
(2015).
Do climate have an impact on survival in wintering
Gulls?
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Helberg, Morten
(2013).
Seabird survival in relation to climate change.
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Helberg, Morten
(2012).
Is optimal seabird monitoring scale at colonial, regional or global level? An evaluation of the use of mark-sight-resight methods.
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Breistøl, Arild & Helberg, Morten
(2012).
Dystre tall for hettemåkebestanden i Norge.
Vår Fuglefauna.
ISSN 0332-5601.
35(4),
p. 150–157.
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Helberg, Morten
(2011).
Bymåkene skal under lupen.
[Newspaper].
Stavanger Aftenblad.
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Helberg, Morten
(2011).
Vil forske på urbane måser.
Avisa Tromsø.
p. 6–6.
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Helberg, Morten; Breistøl, Arild & Lorentzen, Nils Helge
(2011).
Hvordan går det med hettemåkene i Norge?
Vår Fuglefauna.
ISSN 0332-5601.
34(1),
p. 6–11.
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Helberg, Morten; Heggøy, Oddvar; Dahl, Espen; Fredriksson, Øyvind; Gunleifsen, Leif & Gunnersen, Jan Edvinn
[Show all 14 contributors for this article]
(2021).
Intensiv overvåking av hubro i Norge i 2021.
BirdLife Norge.
ISSN 978-82-78-52180-9.
Show summary
Intensiv overvåking av hubro Bubo bubo inngår som en del av oppfølgingen av den nasjonale handlingsplanen for arten, og ble startet opp av Norsk Ornitologisk Forening (NOF) i 2012. Overvåkingen har som mål å undersøke status for hubrotilhold, hekking og ungeproduksjon i et utvalg overvåkingsterritorier. For hvert overvåkingsområde er det lagt ut 15 territorier, hvor hubroenes aktivitet kartlegges med metoder som minimaliserer forstyrrelse for å påvirke fuglene minst mulig.
Fire delområder inngikk i intensivovervåkingen t.o.m. 2019 (Telemark, Aust-Agder, Høg-Jæren og Øygarden). I tillegg har hubrobestanden i et område i Nordland (Helgelandskysten) blitt overvåket vha. en noe annerledes metodikk i perioden. Samtidig som overvåkingsmetodikken ble revidert og Statens naturoppsyn (SNO) overtok ansvaret for prosjektet, ble overvåkingen utvidet med et delområde nord i Østerdalen f.o.m. feltsesongen 2020.
I 2021 fikk vi tilstrekkelige overvåkingsdata fra 74 av 75 territorier i Sør-Norge, og (for de fleste parametere) fra alle 51 territoriene på Helgeland. Vellykket hekking ble påvist i 13 av 74 territorier i Sør-Norge (18%), og her ble det produsert 23 hubrounger som hadde alder på minst 60 dager (flygedyktig alder). Om hubroungene vokser opp til flygedyktig alder eller ikke, påvises nå ved hjelp av lyttebokser, og denne metoden brukes også tidlig i sesongen, for å kartlegge roping som forteller oss om fuglene er til stede i territoriet.
På Helgeland ble alle 51 overvåkingsterritoriene kontrollert, og vellykket hekking ble dokumentert i 15 av disse (29 %). På Helgeland ble det produsert minst 20 hubrounger ved flygedyktig alder, en nedgang fra hekkesesongen 2020, hvor minst 26 hubrounger ble påvist flygedyktige. Også for territoriene i Sør-Norge er det en nedgang fra 2020 til 2021, fra 34 hubrounger i 2020 til 23 i 2021.
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Ruus, Anders; Bæk, Kine; Rundberget, Thomas; Allan, Ian; Beylich, Bjørnar & Vogelsang, Christian
[Show all 10 contributors for this article]
(2020).
Environmental Contaminants in an Urban Fjord, 2019.
Norsk institutt for vannforskning.
ISSN 978-82-577-7290-1.
Full text in Research Archive
Show summary
This programme, “Environmental Contaminants in an Urban Fjord” has covered sampling and analyses of sediment and organisms in a marine food web of the Inner Oslofjord, in addition to samples of blood and eggs from herring gull. The programme also included inputs of pollutants via surface water (storm water), and effluent water and sludge from a sewage treatment plant. The bioaccumulation potential of the contaminants in the Oslo fjord food web was evaluated. The exposure to/accumulation of the contaminants was also assessed in birds. A vast number of chemical parameters have been quantified, in addition to some biological effect parameters in cod, and the report serves as a status description of the concentrations of these chemicals in different compartments of the Inner Oslofjord marine ecosystem.
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Ruus, Anders; Bæk, Kine; Petersen, Karina; Allan, Ian; Beylich, Bjørnar & Schlabach, Martin
[Show all 9 contributors for this article]
(2018).
Environmental Contaminants in an Urban Fjord, 2017.
Norsk institutt for vannforskning.
ISSN 978-82-577-7103-4.
Full text in Research Archive
Show summary
This programme, “Environmental Contaminants in an Urban Fjord” has covered sampling and analyses
of sediment and organisms in a marine food web of the Inner Oslofjord, in addition to samples of
blood and eggs from herring gull and eider duck. The programme also included inputs of pollutants
via surface water (storm water), and effluent water and sludge from a sewage treatment plant. The
bioaccumulation potential of the contaminants in the Oslo fjord food web was evaluated. The
exposure to/accumulation of the contaminants was also assessed in birds. A vast number of chemical
parameters have been quantified, in addition to some biological effect parameters in cod, and the
report serves as valuable documentation of the concentrations of these chemicals in different
compartments of the Inner Oslofjord marine ecosystem.
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Ruus, Anders; Bæk, Kine; Petersen, Karina; Allan, Ian; Beylich, Bjørnar & Schlabach, Martin
[Show all 8 contributors for this article]
(2016).
Environmental Contaminants in an Urban Fjord, 2015.
Norsk institutt for vannforskning.
ISSN 978-82-577-6808-9.
Full text in Research Archive
Show summary
This programme, “Environmental Contaminants in an Urban Fjord” has covered sampling and analysis of sediment and organisms in a marine food web of the Inner Oslofjord, in addition to samples of blood and eggs from herring gull. The programme also included inputs of pollutants via surface water (storm water). The bioaccumulation potential of the contaminants in the Oslo fjord food web was evaluated. The exposure to/accumulation of the contaminants was also assessed in herring gull, as an indicator of an urban fjord inhabitant. A vast number of chemical parameters have been quantified, in addition to
some biological effect parameters in cod, and the report serves as valuable documentation of the concentrations of these chemicals in different compartments of the Inner Oslofjord marine ecosystem. Furthermore, this report presents relationships between the contaminant concentrations and various biological variables.
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Ruus, Anders; Allan, Ian; Beylich, Bjørnar; Bæk, Kine; Schlabach, Martin & Helberg, Morten
(2015).
Environmental Contaminants in an Urban Fjord, 2014.
Norsk institutt for vannforskning.
ISSN 978-82-577-6619-1.
Full text in Research Archive
Show summary
This programme, “Environmental Contaminants in an Urban Fjord” has covered sampling and analysis of organisms in a marine food web of the Inner Oslofjord, in addition to samples of sediment, blue mussel and polychaetes at selected locations in the fjord. The programme also included inputs of pollutants via surface water (storm water). Results from other monitoring programmes such as "Contaminants in coastal areas" (MILKYS) and "Riverine inputs and direct discharges to Norwegian coastal waters" (RID), as well as results from other input measurements to the inner Oslofjord, and measurements of contaminants at Bekkelaget sewage treatment plant are referred and placed in context with the results of the present programme. A vast number of chemical parameters have been quantified, and the report serves as valuable documentation of the concentrations of these chemicals in different compartments of the Inner Oslofjord marine ecosystem. Furthermore, this report presents relationships between the contaminant concentrations and various biological variables.
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Ruus, Anders; Allan, Ian; Beylich, Bjørnar; Bæk, Kine; Schlabach, Martin & Helberg, Morten
(2014).
Environmental Contaminants in an Urban Fjord.
Norsk institutt for vannforskning.
ISSN 978-82-577-6449-4.
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This programme, “Environmental Contaminants in an Urban Fjord” has covered sampling and analysis of organisms in a marine food web of the Inner Oslofjord, in addition to samples of sediment, blue mussel and polychaetes at selected locations in the fjord. The programme also included inputs of pollutants via surface water (storm water). Results from other monitoring programmes such as "Contaminants in coastal areas" (MILKYS) and "Riverine inputs and direct discharges to Norwegian coastal waters" (RID), as well as results from other input measurements to the inner Oslofjord, and measurements of contaminants at Bekkelaget sewage treatment plant are referred and placed in context with the results of the present programme. A vast number of chemical parameters have been quantified, and the report serves as valuable documentation of the concentrations of these chemicals in different compartments of the Inner Oslofjord marine ecosystem. Furthermore, this report presents relationships between the contaminant concentrations and various biological variables.
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Helberg, Morten; Johnsen, Trond Vidar & Fauchald, Per
(2005).
Registrering av sjøfugl fra flytokt. Barentshavet øst, 8.februar 2005.
Norsk institutt for naturforskning.
ISSN 82-426-1564-0.
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Published Nov. 3, 2010 3:27 PM
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