scholarly journals Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish

2019 ◽  
Vol 9 (19) ◽  
pp. 11112-11121 ◽  
Author(s):  
Marine Cusa ◽  
Jørgen Berge ◽  
Øystein Varpe
Keyword(s):  
High Arctic ◽  
Feeding Patterns ◽  
Arctic Fish ◽  
Seasonal Shifts

Sequencing and characterization of a multi-organ Arctic charr transcriptome: A toolbox for investigating polymorphism and seasonal life in a high Arctic fish

2016 ◽  
Vol 29 ◽  
pp. 45-53 ◽  
Author(s):  
Elodie Magnanou ◽  
Celine Noirot ◽  
Jack Falcón ◽  
Even Hjalmar Jørgensen
Keyword(s):  
Arctic Charr ◽  
High Arctic ◽  
Arctic Fish

scholarly journals Impact of vessel traffic on the home ranges and movement of shorthorn sculpin (Myoxocephalus scorpius) in the nearshore environment of the high Arctic

2018 ◽  
Vol 75 (12) ◽  
pp. 2390-2400 ◽  
Author(s):  
Silviya V. Ivanova ◽  
Steven T. Kessel ◽  
Justin Landry ◽  
Caitlin O’Neill ◽  
Montana F. McLean ◽  
...  
Keyword(s):  
Acoustic Telemetry ◽  
Open Water ◽  
High Arctic ◽  
The Arctic ◽  
Environmental Drivers ◽  
Home Ranges ◽  
Shorthorn Sculpin ◽  
Arctic Fish ◽  
Myoxocephalus Scorpius ◽  
The Impact

Sea ice reduction in the Arctic is allowing for increased vessel traffic and activity. Vessel noise is a known anthropogenic disturbance, but its effects on Arctic fish are largely unknown. Using acoustic telemetry — Vemco positioning system — we quantified the home ranges and fine-scale movement types (MT) of shorthorn sculpin (Myoxocephalus scorpius), a common benthic Arctic fish, in response to vessels and environmental drivers during open water over 3 years (2012–2014). Low overlap of core home ranges (50%) for all years and a change of overall MT proportions (significant in 2012 only) were observed when vessels were present compared with absent. However, changes in MTs associated with vessel presence were not consistent between years. Photoperiod was the only environmental driver that influenced (R2 = 0.32) MTs of sculpin. This is the first study of vessel impacts on Arctic fish using acoustic telemetry and demonstrates that individuals alter their behavior and home ranges when vessels are present. Given increasing vessel traffic in the Arctic, additional study on the impact of vessels on these ecosystems is warranted.

Summer phytoplankton of the northern Barents Sea (75–80º N)

2019 ◽  
pp. 8-19
Author(s):  
Larisa A. Pautova ◽  
Vladimir A. Silkin ◽  
Marina D. Kravchishina ◽  
Valeriy G. Yakubenko ◽  
Anna L. Chultsova
Keyword(s):  
Barents Sea ◽  
Weighted Average ◽  
Arctic Basin ◽  
High Arctic ◽  
Alexandrium Tamarense ◽  
Warm Water ◽  
The Arctic ◽  
Absolute Maximum ◽  
Deep Trench ◽  
Maximum Biomass

The structure of the summer planktonic communities of the Northern part of the Barents sea in the first half of August 2017 were studied. In the sea-ice melting area, the average phytoplankton biomass producing upper 50-meter layer of water reached values levels of eutrophic waters (up to 2.1 g/m3). Phytoplankton was presented by diatoms of the genera Thalassiosira and Eucampia. Maximum biomass recorded at depths of 22–52 m, the absolute maximum biomass community (5,0 g/m3) marked on the horizon of 45 m (station 5558), located at the outlet of the deep trench Franz Victoria near the West coast of the archipelago Franz Josef Land. In ice-free waters, phytoplankton abundance was low, and the weighted average biomass (8.0 mg/m3 – 123.1 mg/m3) corresponded to oligotrophic waters and lower mesotrophic waters. In the upper layers of the water population abundance was dominated by small flagellates and picoplankton from, biomass – Arctic dinoflagellates (Gymnodinium spp.) and cold Atlantic complexes (Gyrodinium lachryma, Alexandrium tamarense, Dinophysis norvegica). The proportion of Atlantic species in phytoplankton reached 75%. The representatives of warm-water Atlantic complex (Emiliania huxleyi, Rhizosolenia hebetata f. semispina, Ceratium horridum) were recorded up to 80º N, as indicators of the penetration of warm Atlantic waters into the Arctic basin. The presence of oceanic Atlantic species as warm-water and cold systems in the high Arctic indicates the strengthening of processes of “atlantificacion” in the region.

Structural variation in the songs of Atlantic walruses breeding in the Canadian High Arctic

2003 ◽  
Vol 29 (2) ◽  
pp. 297-318 ◽  
Author(s):  
Becky Sjare ◽  
Ian Stirling ◽  
Cheryl Spencer
Keyword(s):  
Structural Variation ◽  
High Arctic ◽  
Canadian High Arctic

Body condition and spring migration in female high-arctic barnacle geeseBranta leucopsis

1996 ◽  
Vol 2 (1) ◽  
pp. 247-251 ◽  
Author(s):  
Ingunn M. Tombre ◽  
Kjell E. Erikstad ◽  
Geir W. Gabrielsen ◽  
Karl-Birger Strann ◽  
Jeffrey M. Black
Keyword(s):  
Body Condition ◽  
High Arctic ◽  
Spring Migration

Pollen morphology of selected tundra plants from the high Arctic of Ny-Ålesund, Svalbard

2013 ◽  
Vol 23 (2) ◽  
pp. 103-115 ◽  
Author(s):  
Yifeng YAO ◽  
Qi ZHAO ◽  
Subir BERA ◽  
Xiaoli LI ◽  
Chengsen LI
Keyword(s):  
Pollen Morphology ◽  
High Arctic

Hydrological Response of a Patchy High Arctic Wetland

2000 ◽  
Vol 31 (4-5) ◽  
pp. 317-338 ◽  
Author(s):  
Kathy L. Young ◽  
Ming-ko Woo
Keyword(s):  
Weather Conditions ◽  
High Arctic ◽  
Ground Ice ◽  
Ice Melt ◽  
Snow Storage ◽  
Streamflow Response ◽  
Dry Seasons ◽  
And Storage ◽  
Surface And Subsurface Flow ◽  
Present Understanding

High Arctic patchy wetlands are ecological oases in a polar desert environment and are vulnerable to climatic warming. At present, understanding of their responses to external factors (climate and terrain) is limited. This study examines a wetland located in a topographic depression maintained by seasonal snowmelt, ground ice melt and lateral inflows. The wetland is located on Cornwallis Island, Nunavut, Canada. Hydrological, climatological and soil observations were made over several summers with different weather conditions. The summers of 1996 and 1997 were cool and wet but the summer of 1998 was warm and dry. The melt in 1996 was rapid due to rain on snow events and only lasted six days. Deeper snow in 1997 prolonged the melt season to 18 days. A shallow snow-cover in 1998 and early melt depleted the snow by early June. Surface, groundwater and storage fluctuations in the wetland were dictated by snowmelt, rainfall, evaporation loss from the wetland and lateral inputs which in turn were controlled by the melting of the late-lying snow storage in the catchment. Soil factors influence the spatial variations in ground thaw which affects the surface and subsurface flow. Streamflow response of the wetland reflects a nival regime and augmentation of streamflow thoughout the summer season in all three years is supported by multiple water sources: ground ice melt and suprapermafrost water from a large late-lying snowpack. Overall, this study suggests that the survival of some patchy wetlands depends on their interaction with the surrounding basin, with a dependency probably being more important during warm and dry seasons.

In situ optical and microphysical properties of tropospheric aerosols in the Canadian High Arctic from 2016 to 2019

2021 ◽  
Vol 250 ◽  
pp. 118254
Author(s):  
Andy Vicente-Luis ◽  
Samantha Tremblay ◽  
Joelle Dionne ◽  
Rachel Y.-W. Chang ◽  
Pierre F. Fogal ◽  
...  
Keyword(s):  
High Arctic ◽  
Canadian High Arctic ◽  
Microphysical Properties ◽  
Tropospheric Aerosols
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