Joël Durant

• Durant, Joël; Ono, Kotaro & Langangen, Øystein Ole Gahr (2022). Empirical evidence of nonlinearity in bottom up effect in a marine predator-prey system. Biology Letters. ISSN 1744-9561. 18(11). doi: 10.1098/rsbl.2022.0309. Fulltekst i vitenarkiv Vis sammendrag

  Strength of species interaction may have profound effects on population dynamics. Empirical estimates of interaction strength is often based on the assumption that the interaction strengths are constant. Barents Sea cod and capelin are two fish populations for which such interaction has been acknowledged and used, under the assumption of constant interaction strength, when studying their population dynamics. However, species interaction can often be non-linear in marine ecosystems and might profoundly change our understanding of food chains. Analysing 37 years long survey time series in the Arcto-Boreal Barents Sea with a state-space modelling framework, we demonstrate that the effect of capelin on cod is not linear but shifts depending on capelin abundance: while capelin is beneficial for cod population at high abundance, below the threshold, it becomes less important for cod. Our analysis therefore shows the importance of investigating non-linearity in species interaction and may contribute to an improved understanding on species assemblages.

• Walseng, Bjørn; Durant, Joël; Hessen, Dag Olav; Jerstad, Kurt; Nilsson, Anna & Røstad, Ole Wiggo [Vis alle 7 forfattere av denne artikkelen] (2022). Long-term annual and spatial variation of polygyny in the white-throated dipper (Cinclus cinclus). Ecology and Evolution. ISSN 2045-7758. 12(10). doi: 10.1002/ece3.9416. Fulltekst i vitenarkiv
• Finne, Eirik Aasmo; Varpe, Øystein; Durant, Joël; Gabrielsen, Geir W. & Poste, Amanda (2022). Nutrient fluxes from an Arctic seabird colony to the adjacent coastal marine ecosystem. Polar Biology. ISSN 0722-4060. doi: 10.1007/s00300-022-03024-5. Fulltekst i vitenarkiv Vis sammendrag

  Seabirds are important vectors for nutrient transfer across ecosystem boundaries. In this seasonal study, we evaluate the impact of an Arctic colony (Alkhornet, Svalbard) of Black-legged Kittiwakes (Rissa tridactyla) and Brünnich’s Guillemots (Uria lomvia) on stream nutrient concentrations and fuxes, as well as utilization by coastal biota. Water samples from seabird-impacted and control streams were collected regularly throughout the melt season (June–September) for nutrient and organic carbon analysis. Stable carbon and nitrogen isotope analysis (δ13C and δ15N) was used to assess whether seabird derived nitrogen (N) could be traced into flamentous stream algae and marine algae as well as consumers (amphipods). Concentrations of nitrate (NO3−) and nitrite (NO2) peaked in July at 9200 µg N L−1 in seabird-impacted streams, 70 times higher than for control streams. Mean concentrations of phosphate (PO4 3−) in seabird-impacted streams were 21.9 µg P L−1, tenfold higher than in controls. Areal fuxes from seabird-impacted study catchments of NO3− + NO2− and PO4 3− had estimated ranges of 400–2100 kg N km−2 and 15–70 kg P km−2, respectively. Higher δ15N was found in all biota collected from seabird-impacted sites, indicating utilization of seabird-derived nitrogen. Acrosiphonia sp. from seabird-impacted sites had higher δ15N values (20–23‰ vs. 3–6‰) and lower C:N ratios (10.9 vs. 14.3) than specimens collected from control sites, indicating reliance on seabird-derived nitrogen sources and potentially higher N-availability at seabird-impacted nearshore sites. Our study demonstrates how marine nutrients brought onshore by seabirds also can return to the ocean and be utilized by nearshore primary producers and consumers. Cross-ecosystem fuxes · Runof · Svalbard · Seabird guano · Rissa tridactyla · Uria lomvia · Macroalgae

• Durant, Joël; Aarvold, Leana & Langangen, Øystein Ole Gahr (2021). Stock collapse and its effect on species interactions: Cod and herring in the Norwegian-Barents Seas system as an example. Ecology and Evolution. ISSN 2045-7758. 11, s. 16993–17004. doi: 10.1002/ece3.8336. Fulltekst i vitenarkiv Vis sammendrag

  Both the Norwegian Spring Spawning herring (Clupea harengus) and the Northeast Arctic (NEA) cod (Gadus morhua) are examples of strong stock reduction and decline of the associated fisheries due to overfishing followed by a recovery. Cod and herring are both part of the Barents Sea ecosystem, which has experienced major warming events in the early (1920–1940) and late 20th century. While the collapse or near collapse of these stocks seems to be linked to an instability created by overfishing and climate, the difference of population dynamics before and after is not fully understood. In particular, it is unclear how the changes in population dynamics before and after the collapses are associated with biotic interactions. The combination of the availability of unique long-term time series for herring and cod makes it a well-suited study system to investigate the effects of collapse. We examine how species interactions may differently affect the herring and cod population dynamic before and after a collapse. Particularly we explore, using a GAM modeling approach, how herring could affect cod and vice versa. We found that the effect of cod biomass on herring that was generally positive (i.e., covariation) became negative after the collapse (i.e., predation or competition). Likewise a change occurred for the cod, the juvenile herring biomass that had no effect before the collapse had a negative effect after. Our results indicate that the population collapses may alter the inter-specific interactions and response to abiotic environmental changes. While the stocks are at similar abundance levels before and after the collapses, the system is potentially different in its functioning and may require different management action.

• Dupont, Nicolas; Durant, Joël; Gjøsæter, Harald; Langangen, Øystein Ole Gahr & Stige, Leif Christian (2021). Effects of sea ice cover, temperature and predation on the stock dynamics of the key Arctic fish species polar cod Boreogadus saida. Marine Ecology Progress Series. ISSN 0171-8630. 677, s. 141–159. doi: 10.3354/meps13878. Vis sammendrag

  Climate change has large effects on population dynamics of fish species in high latitude ecosystems. Arctic fish stocks experience multiple pressures with changing abiotic living conditions and increased competition and predation from boreal species. However, there are many unknowns regarding how environmental change influences the dynamics of those populations. Here, we focused on the Barents Sea polar cod, a pan-Arctic zooplanktivorous key fish species physiologically and ecologically adapted to the presence of sea ice. We developed an age-resolved Bayesian state-space model of the dynamics of polar cod based on 30 yr of survey data (1986-2015). Using this model, we quantified how inter-annual changes in abundance were associated with abiotic variables (temperature and sea ice cover) and biotic variables (prey biomasses and a predation index). Using the model output, we used a hindcast scenario approach to investigate to which degree the observed variations in total population size were related to the abiotic or biotic variables. Our results showed that variation in abundance of young polar cod (ages 0 and 1) was best explained by abiotic variables while variation in the older age groups (ages 3 and 4) was best explained by predation. Hindcast scenarios showed that the abiotic variables had a more evident effect than predation on population dynamics, but none of the variables we considered could explain the drastic population decline observed in recent years. Our work shows the advantages of studying age-specific responses as a stepping stone to understand changes at the population level.

• Ciannelli, Lorenzo; Neuheimer, Anna B.; Stige, Leif Christian; Frank, Kenneth T.; Durant, Joël & Hunsicker, Mary E. [Vis alle 10 forfattere av denne artikkelen] (2021). Ontogenetic spatial constraints of sub-arctic marine fish species. Fish and Fisheries. ISSN 1467-2960. s. 1–16. doi: 10.1111/faf.12619. Fulltekst i vitenarkiv
• Townhill, Bryony; Holt, Rebecca Emma; Bogstad, Bjarte; Durant, Joël; Pinnegar, John K. & Dolgov, Andrey V. [Vis alle 9 forfattere av denne artikkelen] (2021). Diets of the Barents Sea cod (Gadus morhua) from the 1930s to 2018. Earth System Science Data. ISSN 1866-3508. 13(3), s. 1361–1370. doi: 10.5194/essd-13-1361-2021. Fulltekst i vitenarkiv
• Durant, Joël M; Yaragina, Natalia & Stige, Leif Christian (2021). The role of spatial distribution for growth and survival of juvenile cod Gadus morhua in the Barents Sea. ICES Journal of Marine Science. ISSN 1054-3139. 78(8), s. 2700–2708. doi: 10.1093/icesjms/fsab143. Fulltekst i vitenarkiv Vis sammendrag

  While the importance of early life survival and growth variations for population dynamics is well documented, there is still a relatively limited understanding of how survival and growth is affected by the species’ spatial distribution. Using Barents Sea spatial bottom survey data (1994–2018), we study the spatiotemporal variability of the juvenile Atlantic cod (Gadus morhua) growth and survival. We used indices of the spatial distribution of juvenile cod at age-1 to study the role of distribution for the change in abundance and mean body size through their second winter of life (from age-1 to age-2). Over the 24 years analysed, we found that the location where the age-1 cod are in the Barents Sea matters for their growth and survival. We found that year-classes growing up in the western Barents Sea have higher mortality but faster growth than year-classes distributed farther east. Our results indicate that the biotic and abiotic conditions encountered at the settlement location may influence the spatial survival and growth of age-1 cod and subsequently the population dynamics. Our results underscore the importance of distribution for survival and growth early in life and by providing this essential information has implications for stock assessment and spatial fisheries management.

• Stenseth, Nils Christian; Payne, Mark R.; Bonsdorff, Erik; Dankel, Dorothy Jane; Durant, Joel Marcel & Anderson, Leif G. [Vis alle 17 forfattere av denne artikkelen] (2020). Attuning to a changing ocean. Proceedings of the National Academy of Sciences of the United States of America. ISSN 0027-8424. 117(34), s. 20363–20371. doi: 10.1073/pnas.1915352117. Fulltekst i vitenarkiv
• Dupont, Nicolas; Durant, Joel Marcel; Langangen, Øystein; Gjøsæter, Harald & Stige, Leif Christian (2020). Sea ice, temperature, and prey effects on annual variations in mean lengths of a key Arctic fish, Boreogadus saida, in the Barents Sea. ICES Journal of Marine Science. ISSN 1054-3139. 77(5), s. 1796–1805. doi: 10.1093/icesjms/fsaa040. Fulltekst i vitenarkiv
• Durant, Joel Marcel; Ono, Kotaro; Stenseth, Nils Christian & Langangen, Øystein (2020). Nonlinearity in interspecific interactions in response to climate change: Cod and haddock as an example. Global Change Biology. ISSN 1354-1013. 26(10), s. 5554–5563. doi: 10.1111/gcb.15264. Fulltekst i vitenarkiv
• Ferreira, Ana Sofia De Araújo; Stige, Leif Christian; Neuheimer, Anna B.; Bogstad, Bjarte; Yaragina, Natalia A. & Prokopchuk, Irina [Vis alle 7 forfattere av denne artikkelen] (2020). Match-mismatch dynamics in the Norwegian-Barents Sea system. Marine Ecology Progress Series. ISSN 0171-8630. 650, s. 81–94. doi: 10.3354/MEPS13276. Fulltekst i vitenarkiv Vis sammendrag

  A key process affecting variation in the recruitment of fish into fisheries is the spatio-temporal overlap between prey and predator (match-mismatch hypothesis, MMH). The Northeast Arctic cod Gadus morhua and its dominant prey, the copepod Calanus finmarchicus, have long been studied in the Norwegian-Barents Sea system. However, the mechanistic explanation of how cod survival is affected by MMH dynamics remains unclear. Most MMH studies have focused on either the time synchrony or the spatial overlap between trophic levels. Here, we used G. morhua larvae and C. finmarchicus data collected in the Norwegian-Barents Sea via ichthyoplankton surveys from 1959-1992 to assess the effect of the predator-prey relationship on predator recruitment to the fisheries at age 3 (as a measure of survival) and to develop a metric of predator-prey overlap using spatio-temporal statistical models. We then compared the interannual variability of the predator-prey overlap with the predator’s abundance at recruitment to assess how MMH dynamics explain the survival of cod during its early life stages. We found that the amount of overlap between cod larvae (length: 11-15 mm) and their prey explained 29% of cod recruitment variability. Positive correlations between predator-prey overlap and subsequent recruitment were also found for predators of 6-10 and 16-20 mm, but not for 21+ mm. This improved predator-prey overlap metric is thus (1) useful to better understand how predator-prey dynamics at early life stages of fish impact the survival of later stages; and (2) a valuable tool for assessing the state of an ecosystem.

• Färber, Leonie Anette; van Gemert, Rob; Langangen, Øystein; Durant, Joel Marcel & Andersen, Ken Hasle (2020). Population variability under stressors is dependent on body mass growth and asymptotic body size. Royal Society Open Science. ISSN 2054-5703. 7(2), s. 1–11. doi: 10.1098/rsos.192011. Fulltekst i vitenarkiv
• Durant, Joel Marcel; Molinero, Juan Carlos; Ottersen, Geir; Reygondeau, Gabriel; Stige, Leif Christian & Langangen, Øystein (2019). Contrasting effects of rising temperatures on trophic interactions in marine ecosystems. Scientific Reports. ISSN 2045-2322. 9:15213, s. 1–9. doi: 10.1038/s41598-019-51607-w. Fulltekst i vitenarkiv Vis sammendrag

  In high-latitude marine environments, primary producers and their consumers show seasonal peaks of abundance in response to annual light cycle, water column stability and nutrient availability. Predatory species have adapted to this pattern by synchronising life-history events such as reproduction with prey availability. However, changing temperatures may pose unprecedented challenges by decoupling the predator-prey interactions. Here we build a predator-prey model accounting for the full life-cycle of fish and zooplankton including their phenology. The model assumes that fish production is bottom-up controlled by zooplankton prey abundance and match or mismatch between predator and prey phenology, and is parameterised based on empirical findings of how climate influences phenology and prey abundance. With this model, we project possible climate-warming effects on match-mismatch dynamics in Arcto-boreal and temperate biomes. We find a strong dependence on synchrony with zooplankton prey in the Arcto-boreal fish population, pointing towards a possible pronounced population decline with warming because of frequent desynchronization with its zooplankton prey. In contrast, the temperate fish population appears better able to track changes in prey timing and hence avoid strong population decline. These results underline that climate change may enhance the risks of predator-prey seasonal asynchrony and fish population declines at higher latitudes.

• Stige, Leif Christian; Rogers, Lauren; Neuheimer, Anna B.; Hunsicker, Mary E.; Yaragina, Natalia A. & Ottersen, Geir [Vis alle 9 forfattere av denne artikkelen] (2019). Density‐ and size‐dependent mortality in fish early life stages. Fish and Fisheries. ISSN 1467-2960. 20(5), s. 962–976. doi: 10.1111/faf.12391. Fulltekst i vitenarkiv
• Brosset, Pablo; Durant, Joel Marcel; Van Beveren, Elisabeth & Plourde, Stéphane (2019). Fish population growth in the Gulf of St Lawrence: effects of climate, fishing and predator abundance. Marine Ecology Progress Series. ISSN 0171-8630. 624, s. 167–181. doi: 10.3354/meps13029. Fulltekst i vitenarkiv Vis sammendrag

  Climate variability, fishing and predation are the main factors affecting fish population dynamics. In this study, the drivers of population growth variability were investigated for 7 fish stocks (2 cod, 4 herring and 1 mackerel stock) in the Gulf of St. Lawrence (NW Atlantic). The annual population growth sensitivity to both recruitment and survival (i.e. how much population growth depends on recruitment and survival) was estimated through elasticity analyses before being linked to harvesting history as well as environmental conditions (climate and predation). Stock-specific generalized additive models showed that population growth was most sensitive to recruitment variability with decreasing fish generation time, increasing water temperature and, in some cases, with predation. The dependence of population growth on recruitment, however, was generally close to 0, albeit higher for pelagic stocks than for demersal ones. This indicates that adult survival was more important than recruitment in shaping population growth and thus population size. As climate mainly acts on recruitment while fishing affects adult survival, management efforts seem more important than climate variability in regulating population growth, especially for long-lived cod. Nevertheless, population growth may become increasingly dependent on recruitment variability with warming waters; therefore, more flexible management strategies should be developed to cope with these oscillations.

• Holt, Rebecca Emma; Bogstad, Bjarte; Durant, Joel Marcel; Dolgov, Andrey & Ottersen, Geir (2019). Barents Sea cod (Gadus morhua) diet composition: long-term interannual, seasonal, and ontogenetic patterns. ICES Journal of Marine Science. ISSN 1054-3139. 76(6), s. 1641–1652. doi: 10.1093/icesjms/fsz082. Fulltekst i vitenarkiv
• Sguotti, Camilla; Otto, Saskia A; Frelat, Romain; Langbehn, Tom; Plambech Ryberg, M & Lindegren, Martin [Vis alle 9 forfattere av denne artikkelen] (2019). Catastrophic dynamics limit Atlantic cod recovery. Proceedings of the Royal Society of London. Biological Sciences. ISSN 0962-8452. 286(1898). doi: 10.1098/rspb.2018.2877. Fulltekst i vitenarkiv
• Langangen, Øystein; Färber, Leonie Anette; Stige, Leif Christian; Diekert, Florian Klaus; Barth, Julia Maria Isis & Matschiner, Michael [Vis alle 11 forfattere av denne artikkelen] (2018). Ticket to spawn: Combining economic and genetic data to evaluate the effect of climate and demographic structure on spawning distribution in Atlantic cod. Global Change Biology. ISSN 1354-1013. 25(1), s. 134–143. doi: 10.1111/gcb.14474. Fulltekst i vitenarkiv
• Färber, Leonie Anette; Durant, Joel Marcel; Vindenes, Yngvild & Langangen, Øystein (2018). Increased early offspring growth can offset the costs of long-distance spawning migration in fish. Marine Ecology Progress Series. ISSN 0171-8630. 600, s. 141–150. doi: 10.3354/meps12662. Vis sammendrag

  For long-distance migrations to pay off for individual fish, the energetic costs must be counterbalanced by benefits. Understanding the fitness trade-offs associated with migration is essential for our ability to sustainably manage migratory species. Here, we investigated such trade-offs associated with the spawning migration of Northeast Arctic cod Gadus morhua, a stock of high historical and commercial value known to be able to migrate more than 1000 km southward to reach suitable spawning grounds. Reaching the more distant spawning grounds requires more energy and hence leaves less energy available for processes such as egg production. Previous studies have indicated that increased larval survival (e.g. from rapid early development in warmer southern waters) may offset the parental costs of migration. However, it was suggested that spatial variability in survival of early life stages might cancel out this survival benefit. As an alternative, we ask if the fitness benefit of long-distance migration may reside in increased offspring growth. Using an integral projection model incorporating effects of body length and migration distance, we quantified the increase in offspring growth needed to offset parental costs of long-distance migration on fitness. Our results suggest that a 12.5% length in crease of juvenile cod is required to offset parental costs of long-distance migration. This is within the estimated growth benefit of 20% suggested by drift models of early life stages of cod. These results highlight the potential importance of offspring growth as another factor explaining the benefit of long distance migration, broadening our knowledge on spawning migration.

• Durant, Joel M & Hjermann, Dag Ø (2017). Age-structure, harvesting and climate effects on population growth of Arcto-boreal fish stocks. Marine Ecology Progress Series. ISSN 0171-8630. 577, s. 177–188. doi: 10.3354/meps12210. Fulltekst i vitenarkiv Vis sammendrag

  We used a comparative approach investigating commercially fished species with contrasting life histories and trophic positions in an Arcto-boreal system, the Barents Sea. Our objective was to address the ecological consequences of harvesting on stock properties (stochastic growth rate; a property related to intrinsic growth rate) in relation to different external conditions (fishing pressure and climate). We used age-structured population matrices to calculate the transient elasticity of population growth with respect to recruitment (how much population growth depends on recruitment) over time. Using a generalized additive model (GAM) analysis, we found that the transient elasticity of population growth to recruitment overall depends mostly on age structure (which in turn is affected by fishing) but also on climate (temperature change or winter North Atlantic Oscillation). Our results indicate that under warmer conditions, population growth of high latitude stocks becomes increasingly dependent on recruitment, which makes the stocks more difficult to manage. In general, there was no effect of ongoing fishing pressure on elasticity after age structure had been taken into account, supporting the view that long-term fishing pressure affects the susceptibility of the population to climate indirectly, by changing the age structure of the stock. However, for most of the stocks we have studied here, populations have low elasticity to recruitment due to their life history, meaning that the health of the stock mainly depends on survival after the recruitment stage; i.e. fisheries management is more important than climate.

• Langangen, Øystein; Ohlberger, Jan; Stige, Leif C.; Durant, Joel M.; Ravagnan, Elisa & Stenseth, Nils C. [Vis alle 7 forfattere av denne artikkelen] (2017). Cascading effects of mass mortality events in Arctic marine communities. Global Change Biology. ISSN 1354-1013. 23(1), s. 283–292. doi: 10.1111/gcb.13344. Fulltekst i vitenarkiv
• Feng, Jianfeng; Durant, Joel Marcel; Stige, Leif Christian; Hessen, Dag Olav; Hjermann, Dag Øystein & Zhu, Lin [Vis alle 8 forfattere av denne artikkelen] (2015). Contrasting correlation patterns between environmental factors and chlorophyll levels in the global ocean. Global Biogeochemical Cycles. ISSN 0886-6236. 29(12), s. 2095–2107. doi: 10.1002/2015GB005216.
• Stenseth, Nils Christian; Durant, Joel Marcel; Fowler, Mike; Matthysen, Erik; Adriaensen, Frank & Jonzén, Niclas [Vis alle 12 forfattere av denne artikkelen] (2015). Testing for effects of climate change on competitive relationships and coexistence between two bird species. Proceedings of the Royal Society of London. Biological Sciences. ISSN 0962-8452. 282, s. 1–9. doi: 10.1098/rspb.2014.1958.
• Durant, Joel Marcel; Skern-Mauritzen, Mette; Krasnov, Yuri V.; Nikolaeva, Natalia G.; Lindstrøm, Ulf & Dolgov, Andrey V. (2014). Temporal dynamics of top predators interactions in the Barents Sea. PLOS ONE. ISSN 1932-6203. 9(11). doi: 10.1371/journal.pone.0110933. Fulltekst i vitenarkiv
• Feng, Jianfeng; Stige, Leif Christian; Durant, Joel Marcel; Hessen, Dag Olav; Zhu, Lin & Hjermann, Dag Øystein [Vis alle 8 forfattere av denne artikkelen] (2014). Large-scale season-dependent effects of temperature and zooplankton on phytoplankton in the North Atlantic. Marine Ecology Progress Series. ISSN 0171-8630. 502, s. 25–37. doi: 10.3354/meps10724.
• Stige, Leif Christian; Dalpadado, Padmini; Orlova, Emma L.; Boulay, Ann-Cecilie; Durant, Joel Marcel & Ottersen, Geir [Vis alle 7 forfattere av denne artikkelen] (2014). Spatiotemporal statistical analyses reveal predator-driven zooplankton fluctuations in the Barents Sea. Progress in Oceanography. ISSN 0079-6611. 120, s. 243–253. doi: 10.1016/j.pocean.2013.09.006.
• Chambers, Lynda E.; Altwegg, Res; Barbraud, Christophe; Barnard, Phoebe; Beaumont, Linda J. & Crawford, Robert J. M. [Vis alle 16 forfattere av denne artikkelen] (2013). Phenological Changes in the Southern Hemisphere. PLOS ONE. ISSN 1932-6203. 8(10). doi: 10.1371/journal.pone.0075514. Fulltekst i vitenarkiv
• Ottersen, Geir; Stige, Leif Christian; Durant, Joel Marcel; Chan, Kung-Sik; Rouyer, Tristan Alexander & Drinkwater, Kennneth F. [Vis alle 7 forfattere av denne artikkelen] (2013). Temporal shifts in recruitment dynamics of North Atlantic fish stocks: effects of spawning stock and temperature. Marine Ecology Progress Series. ISSN 0171-8630. 480, s. 205–225. doi: 10.3354/meps10249.
• Durant, Joel Marcel; Hjermann, Dag Øystein & Handrich, Yves (2013). Diel feeding strategy during breeding in male Barn Owls (Tyto alba). Journal of Ornithology = Journal fur Ornithologie. ISSN 0021-8375. 154(3), s. 863–869. doi: 10.1007/s10336-013-0956-1. Fulltekst i vitenarkiv
• Durant, Joel Marcel; Hidalgo, Manuel; Rouyer, Tristan Alexander; Hjermann, Dag Øystein; Ciannelli, Lorenzo & Eikeset, Anne Marie [Vis alle 8 forfattere av denne artikkelen] (2013). Population growth across heterogeneous environments: effects of harvesting and age structure. Marine Ecology Progress Series. ISSN 0171-8630. 480, s. 277–287. doi: 10.3354/meps10308. Fulltekst i vitenarkiv
• Durant, Joel Marcel; Hjermann, Dag Øystein; Falkenhaug, Tone; Gifford, Dian; Naustvoll, Lars Johan & Sullivan, Barbara [Vis alle 8 forfattere av denne artikkelen] (2013). Extension of the match-mismatch hypothesis to predator-controlled systems. Marine Ecology Progress Series. ISSN 0171-8630. 474, s. 43–52. doi: 10.3354/meps10089. Fulltekst i vitenarkiv
• Sabarros, Philippe Sunil; Durant, Joel Marcel; Grémillet, David; Crawford, Robert J. M. & Stenseth, Nils Christian (2012). Differential responses of three sympatric seabirds to spatio-temporal variability in shared resources. Marine Ecology Progress Series. ISSN 0171-8630. 468, s. 291–301. doi: 10.3354/meps09972.
• Durant, Joel Marcel; Krasnov, Yuri V.; Nikolaeva, Natalia G. & Stenseth, Nils Christian (2012). Within and between species competition in a seabird community: statistical exploration and modeling of time-series data. Oecologia. ISSN 0029-8549. 169(3), s. 685–694. doi: 10.1007/s00442-011-2226-3.
• Hidalgo, Manuel; Rouyer, Tristan Alexander; Bartolino, Valerio; Cerviño, Santiago; Ciannelli, Lorenzo & Massuti, Enric [Vis alle 12 forfattere av denne artikkelen] (2012). Context-dependent interplays between truncated demographies and climate variation shape the population growth rate of a harvested species. Ecography. ISSN 0906-7590. 35(7), s. 637–649. doi: 10.1111/j.1600-0587.2011.07314.x.
• Rouyer, Tristan Alexander; Ottersen, Geir; Durant, Joel Marcel; Hidalgo, Manuel; Hjermann, Dag Øystein & Persson, Jonas [Vis alle 8 forfattere av denne artikkelen] (2011). Shifting dynamic forces in fish stock fluctuations triggered by age truncation? Global Change Biology. ISSN 1354-1013. 17(10), s. 3046–3057. doi: 10.1111/j.1365-2486.2011.02443.x.
• Le Maho, Y; Saraux, Claire; Durant, Joel Marcel; Viblanc, Vincent A.; Gauthier-Clerc, Michel & Yoccoz, Nigel [Vis alle 8 forfattere av denne artikkelen] (2011). An ethical issue in biodiversity science: The monitoring of penguins with flipper bands. Comptes rendus. Biologies. ISSN 1631-0691. 334(5-6), s. 378–384. doi: 10.1016/j.crvi.2011.04.004.
• Crawford, Robert J.M.; Altwegg, Res; Barham, Barbara J.; Barham, Peter J.; Durant, Joel Marcel & Dyer, Bruce M. [Vis alle 15 forfattere av denne artikkelen] (2011). Collapse of South Africa’s penguins in the early 21st century. South African Journal of Marine Science. ISSN 0257-7615. 33(1), s. 139–156. doi: 10.2989/1814232X.2011.572377.
• Saraux, Claire; Le Bohec, Céline; Durant, Joel Marcel; Viblanc, Vincent A.; Gauthier-Clerc, Michel & Beaune, David [Vis alle 10 forfattere av denne artikkelen] (2011). Reliability of flipper-banded penguins as indicators of climate change. Nature. ISSN 0028-0836. 469(7329), s. 203–208. doi: 10.1038/nature09630.
• Durant, Joel Marcel; Crawford, R.J.M.; Wolfaardt, Anton C.; Agenbag, Kobus; Visagie, Johan & Upfold, Leisha [Vis alle 7 forfattere av denne artikkelen] (2010). Influence of feeding conditions on breeding of African penguins-importance of adequate local food supplies. Marine Ecology Progress Series. ISSN 0171-8630. 420, s. 263–271. doi: 10.3354/meps08857.
• Durant, Joel Marcel; Gendner, Jean-Paul & Handrich, Yves (2010). Behavioural and body mass changes before egg laying in the Barn Owl: cues for clutch size determination? Journal of Ornithology = Journal fur Ornithologie. ISSN 0021-8375. 151(1), s. 11–17. doi: 10.1007/s10336-009-0415-1. Vis sammendrag

  To investigate laying decision and clutch size determination in indeterminate layers, we analysed in-nest activity (nest presence, and copulation, prey deliveries, and entrance frequencies) and female body mass change, as well as their relation to clutch size variation in five Barn Owl pairs (Tyto alba) nesting in eastern France. Body mass of the female and behaviour [copulation frequency, entrance frequency, and prey delivery to the nest by the male (in number and mass)] were monitored using an automated weighing system and a video camera. There was a consistent change of behaviour and foraging activity among pairs ca. 18 days before laying indicating that the females may be tied to the nest at this time. Barn Owls being indeterminate layers have their clutch size determined at the oviposition of the first egg of the clutch. Window correlation analyses between the clutch size and the female body mass gain indicate that the clutch size might be determined no later than a few days before the laying of the first egg. Our results suggest that female Barn Owls may use the pre-laying period to determine the clutch size using cues such as the male food deliveries (a proxy for male quality).

• Durant, Joel Marcel; Hjermann, Dag Øystein; Frederiksen, Morten; Charrassin, Jean-Benoît; Le Maho, Yvon & Sabarros, Philippe Sunil [Vis alle 8 forfattere av denne artikkelen] (2009). Pros and cons of using seabirds as ecological indicators. Climate Research (CR). ISSN 0936-577X. 39(2), s. 115–129. doi: 10.3354/cr00798. Fulltekst i vitenarkiv
• Cury, Philippe Maurice ; Shin, Yunne-Jai; Planque, Benjamin; Durant, Joël Marcel; Fromentin, Jean-Marc & Kramer-Schadt, Stephanie A. [Vis alle 9 forfattere av denne artikkelen] (2008). Ecosystem oceanography for global change in fisheries. Trends in Ecology & Evolution. ISSN 0169-5347. 23(6), s. 338–346. doi: 10.1016/j.tree.2008.02.005.
• Durant, Joel Marcel; Hjermann, Dag Øystein; Sabarros, Philippe Sunil & Stenseth, Nils Christian (2008). Northeast Arctic Cod population persistence in the Lofoten-Barents Sea system under fishing. Ecological Applications. ISSN 1051-0761. 18(3), s. 662–669.
• Le Bohec, Céline; Durant, Joel Marcel; Gauthier-Clerc, Michel; Stenseth, Nils Christian; Park, Young-Hyang & Pradel, Roger [Vis alle 9 forfattere av denne artikkelen] (2008). King penguin population threatened by Southern Ocean warming. Proceedings of the National Academy of Sciences of the United States of America. ISSN 0027-8424. 105, s. 2493–2497. doi: 10.1073/pnas.0712031105.
• Durant, Joel Marcel; Landys, MM & Handrich, Y (2008). Composition of the body mass overshoot in European barn owl nestlings (Tyto alba): insurance against scarcity of energy or water? Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology. ISSN 0174-1578. 178. doi: 10.1007/s00360-007-0246-4.
• Durant, Joël M.; Hjermann, Dag Ø.; Ottersen, Geir & Stenseth, Nils Chr. (2007). Climate and the match or mismatch between predator requirements and resource availability. Climate Research (CR). ISSN 0936-577X. 33(3), s. 271–283. Fulltekst i vitenarkiv
• Hjermann, Dag Øystein; Melsom, Arne; Dingsør, Gjert Endre; Durant, Joël M.; Eikeset, Anne Maria & Røed, Lars Petter [Vis alle 9 forfattere av denne artikkelen] (2007). Fish and oil in the Lofoten-Barents Sea system: synoptic review of the effect of oil spills on fish populations. Marine Ecology Progress Series. ISSN 0171-8630. 339, s. 283–299.
• Durant, Joel Marcel; Anker-Nilssen, Tycho & Stenseth, Nils Christian (2006). Ocean climate prior to breeding affects the duration of the nestling period in the Atlantic puffin. Biology Letters. ISSN 1744-9561. 2, s. 628–631. doi: 10.1098/rsbl.2006.0520.
• Durant, Joel Marcel; Hjermann, Dag Øystein; Anker-Nilssen, Tycho; Beaugrand, Grégory; Mysterud, Atle & Pettorelli, Nathalie [Vis alle 7 forfattere av denne artikkelen] (2005). Timing and abundance as key mechanisms affecting trophic interactions in variable environments. Ecology Letters. ISSN 1461-023X. 8, s. 952–958. doi: 10.1111/j.1461-0248-2005.00798.
• Stenseth, Nils Christian; Mysterud, Atle; Durant, Joel Marcel; Hjermann, Dag Øystein & Ottersen, Geir (2005). Uniting ecologists into a smooth, tasty and potent blend. Marine Ecology Progress Series. ISSN 0171-8630. 304, s. 289–292.

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• Durant, Joël (2022). Match-mismatch, trophic interactions and climate change. Vis sammendrag

  Climate change is affecting the trophic interactions on which we base our understanding of marine systems. The consequence is that we must get used to a world where our hard acquired knowledge on ecosystem and trophic interactions is no longer accurate, or at least not reliably so. In other words, the models we have developed based on long-term time series may not be reliable. We know that the physiology and the mechanisms it is driving are changing at the slower pace than climate. Building mechanistic models could thus be useful to explore the future consequences of climate change. In fish, the major driver of population dynamics is the recruitment of individuals through the reproduction process (i.e., production and survival through the early life stages). Several mechanistic hypotheses have been set forth to explain changes in fish production in relation to phenology, which is well documented to be strongly affected by climate change. One of the most well-known is the “match-mismatch” hypothesis (MMH) elaborated by David Cushing. A question is if the MMH is a useful tool to understand animal recruitment in the context of global climate change. I will present some of the latest development from my group on match-mismatch models (role of abundance and spatial distribution…) and the role of MMH for population dynamics. Finally, I will address the value of the MMH to make projection and I will highlight some of the limitation of our current understanding of MMH.

• Jentoft, Sissel & Durant, Joël (2021). A not so icy relationship: The Polar cod in the Barents Sea.
• Dupont, Nicolas; Durant, Joël; Gjøsæter, Harald; Langangen, Øystein Ole Gahr & Stige, Leif Christian (2021). Using time series to predict the future: quantifying the effects of borealization on polar cod (Boreogadus saida).
• Holt, Rebecca Emma; Bogstad, Bjarte; Durant, Joël; Dolgov, Andrey V. & Ottersen, Geir (2019). Erratum: Barents Sea cod (Gadus morhua) diet composition: Long-term interannual, seasonal, and ontogenetic patterns (ICES Journal of Marine Science (2019) DOI: 10.1093/icesjms/fsz082). ICES Journal of Marine Science. ISSN 1054-3139. 76(6). doi: 10.1093/icesjms/fsz117.
• Dupont, Nicolas; Durant, Joel Marcel; Langangen, Øystein; Gjøsæter, Harald & Stige, Leif Christian (2019). Environmental effects on population annual mean length of polar cod (Boreogadus saida) in the Barents Sea .
• Dupont, Nicolas; Durant, Joel Marcel; Langangen, Øystein; Gjøsæter, Harald & Stige, Leif Christian (2019). Environmental effects on population annual mean length of polar cod (Boreogadus saida) in the Barents Sea .
• Stige, Leif Christian; Durant, Joel Marcel & Langangen, Øystein (2019). Effects of climate change, fishing and oil on marine ecosystems.
• Stige, Leif Christian; Langangen, Øystein; Durant, Joel Marcel; Knutsen, Halvor; Olsen, Esben Moland & Ottersen, Geir (2019). Forskning på torsk. Biolog. ISSN 0801-0722. 37(2), s. 46–49.
• Stige, Leif Christian; Rogers, Lauren; Neuheimer, Anna B.; Hunsicker, Mary E.; Yaragina, Natalia A. & Ottersen, Geir [Vis alle 9 forfattere av denne artikkelen] (2019). Density- and size-dependent mortality in fish early life stages.
• Fauchald, Per & Durant, Joel Marcel (2019). Hvorfor fluktuerer de store marine fiskebestandene? Naturen. ISSN 0028-0887. 143(3), s. 124–132. doi: 10.18261/issn.1504-3118-2019-03-06.
• Llope, Marcos; Blenckner, Thorsten; Vasilakopoulos, Paris; McGinty, Niall; Lynam, Christopher Philip & Helaouët, Pierre [Vis alle 10 forfattere av denne artikkelen] (2018). Resilience of northeast Atlantic marine ecosystems.
• Llope, Marcos; Blenckner, Thorsten; Vasilakopoulos, Paris; McGinty, Niall; Lynam, Christopher Philip & Helaouët, Pierre [Vis alle 10 forfattere av denne artikkelen] (2018). Continuous and abrupt changes in the resilience of northeast Atlantic marine ecosystems.
• Deris, Leana; Langangen, Øystein & Durant, Joel Marcel (2018). Effect of stock collapse on predator prey relationships.
• Färber, Leonie Anette; Sguotti, Camilla; Durant, Joel Marcel; Langangen, Øystein; Otto, Saskia A & Möllmann, Christian (2018). Detecting catastrophic transitions – the case of North Atlantic herring.
• Deris, Leana; Langangen, Øystein & Durant, Joel Marcel (2018). Effect of cod (Gadus morhua) predation on juvenile herring (Clupea harengus) in the Barents Sea. Vis sammendrag

  The Barents Sea is a shelf sea sustaining a highly productive ecosystem including several commercially important fish stocks among which the Northeast Arctic (NEA) cod (Gadus morhua), Norwegian Spring Spawning (NSS) herring (Clupea harengus) and the Barents Sea (BS) capelin (Mallotus villosus) are key fish species in this ecosytem. NSS herring is currently one of the largest herring stocks in the world, and it is both an important prey (for e.g. cod and marine mammals) and predator species (for e.g. planktonic early life stages of fish and zooplankton). It spawns in the Norwegian Sea in February-March and deposits eggs on the sea bottom. After hatching, larvae and 0-group appear in the upper water layer and drift by the coastal current to enter the Barents Sea where they spend their first 3 to 4 years of life before migrating to the north Atlantic as adult. It is during its juvenile life stage that the herring is susceptible to predation by the large stock of NEA cod. Here, we develop a state-space model to estimate the effect of cod predation on young herring mortality. We used the obtained estimates to quantify at the population level the joint effect of fishing and cod predation on young herring. Our results indicate a significant effect of cod and illustrate how management of NSS herring benefits from jointly considering cod and fishing.

• Färber, Leonie Anette; Camilla, Sguotti; Durant, Joel Marcel; Langangen, Øystein; Otto, Saskia A & Möllmann, Christian (2018). Detecting catastrophic transitions – the case of North Atlantic herring.
• Holt, Rebecca Emma; Durant, Joel Marcel; Ottersen, Geir & Bogstad, Bjarte (2017). Cod diet and food web dynamics: What can we learn from the past?
• Färber, Leonie Anette; Durant, Joel Marcel; Vindenes, Yngvild & Langangen, Øystein (2017). Benefit of long distance migration for Barents Sea cod.
• Durant, Joel Marcel; Langangen, Øystein & Dupont, Nicolas (2017). Barents Sea cod larvae survival and match-mismatch .
• Diekert, Florian Klaus; Langangen, Øystein; Färber, Leonie Anette; Stige, Leif Christian & Durant, Joel Marcel (2016). Ticket to Spawn – Using economic data to shed light on biological hypothesis.
• Färber, Leonie Anette; Stige, Leif Christian; Durant, Joel Marcel; Diekert, Florian Klaus & Langangen, Øystein (2016). Ticket to Spawn – Using economic data to shed light on biological hypothesis.
• Durant, Joel Marcel (2016). MARmaED: MARine MAnagement and Ecosystem Dynamics under climate change.
• Durant, Joel Marcel & Ottersen, Geir (2016). Effect of juvenile distribution and environment on the Northeast Arctic haddock .
• Walle, Eirik & Durant, Joel Marcel (2015). Investigating the effect of changes in the timing of fishing on the breeding success of a South African seabird.
• Durant, Joel Marcel; Krasnov, Yuri V.; Nikolaeva, Natalia G. & Hjermann, Dag Øystein (2015). Prey abundance and Competition with fish as drivers for kittiwake population in the subarctic .
• Paasche, Øyvind; Österblom, Henrik; Neuenfeldt, Stefan; Bonsdorff, Erik; Brander, Keith M. & Conley, Daniel [Vis alle 13 forfattere av denne artikkelen] (2015). Connecting the seas of Norden. Nature Climate Change. ISSN 1758-678X. 5(2), s. 89–92. doi: 10.1038/nclimate2471.
• Dankel, Dorothy Jane; Durant, Joel Marcel; Ottersen, Geir; Kjesbu, Olav Sigurd & Stenseth, Nils Christian (2014). "Eco-Harvest Control Rules".
• Durant, Joel Marcel & Ottersen, Geir (2014). Match-mismatch and climate warming, what can we expect?
• Durant, Joel Marcel (2014). Harvesting and Population Structure Effect on Population Growth.
• Durant, Joel Marcel; Skern-Mauritzen, Mette; Krasnov, Yuri V.; Nikolaeva, Natalia G. & Lindstrøm, Ulf (2013). Temporal dynamics of the major predator interaction in the Barents Sea.
• Durant, Joel Marcel; Ottersen, Geir & Stenseth, Nils Christian (2013). Impact of climate and fisheries on sub-Arctic stocks - INTRODUCTION. Marine Ecology Progress Series. ISSN 0171-8630. 480, s. 199–203.
• Saraux, Claire; Le Bohec, Céline; Durant, Joel Marcel & Stenseth, Nils Christian (2011). Terres Australes : les bagues pénalisent les manchots royaux. [Internett]. Ecolorama.fr.
• Saraux, Claire; Le Bohec, Céline; Durant, Joel Marcel & Stenseth, Nils Christian (2011). The flip side of flipper bands on penguins. [Avis]. The Guardian.
• Durant, Joel Marcel; Hidalgo, Manuel & Ciannelli, Lorenzo (2010). How does exploitation of prey fish affect population growth rate in changing seas?
• Durant, Joel Marcel (2009). Response of trophic relationships to climate change in Sub-Arctic Seas.
• Durant, Joel Marcel (2009). Trophic interactions and climate change.
• Durant, Joel Marcel & Le Maho, Yvon (2009). The effect of climate variation on seabirds.
• Durant, Joel Marcel; Le Bohec, Céline; Hjermann, Dag Øystein; Stenseth, Nils Christian & Sabarros, Philippe Sunil (2009). The King Penguin under climate changes: trend and sensitivity.
• Durant, Joel Marcel; Hjermann, Dag Øystein & Stenseth, Nils Christian (2009). Reversing the Match-mismatch relationship: the prey point of view.
• Durant, Joel Marcel (2008). Match-Mismatch: Trophic interactions and climate change.
• Sabarros, Philippe Sunil; Durant, Joel Marcel; Crawford, RJM & Stenseth, Nils Christian (2008). Resource sharing between three seabirds in South Africa.
• Sabarros, Philippe Sunil; Durant, Joel Marcel; Crawford, RJM & Stenseth, Nils Christian (2007). African penguin dynamics in South Africa.
• Durant, Joel Marcel; Hjermann, Dag Øystein; Sabarros, Philippe Sunil & Stenseth, Nils Christian (2007). Food threshold and recruitment.
• Durant, Joel Marcel (2007). Match-mismatch, trophic interactions and climate change.
• Durant, Joel Marcel; Stenseth, Nils Christian & Hjermann, Dag Øystein (2006). Ecosystem tests of the match-mismatch hypothesis. Journal of Ornithology = Journal fur Ornithologie. ISSN 0021-8375. 147, s. 160–160.
• Durant, Joel Marcel; Stenseth, Nils Christian; Dhondt, A.; Sætre, Glenn-Peter & Matthysen, E. (2006). Competition in variable environments. Journal of Ornithology = Journal fur Ornithologie. ISSN 0021-8375. 147, s. 160–160.
• Durant, Joel Marcel (2006). Climate and hunting success in male barn owls. Journal of Ornithology = Journal fur Ornithologie. ISSN 0021-8375. 147, s. 159–160.
• Durant, Joel Marcel; Stenseth, Nils Christian & Hjermann, Dag Øystein (2006). An Ecosystem approach of the match-mismatch hypothesis.
• Durant, Joel Marcel; Hjermann, Dag Øystein & Stenseth, Nils Christian (2005). Match-Mismatch: An old new-idea.

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