scholarly journals No evidence for hybridization between Calanus finmarchicus and Calanus glacialis in a subarctic area of sympatry

2020 ◽  
Author(s):  
Marvin Choquet ◽  
Gauthier Burckard ◽  
Stig Skreslet ◽  
Galice Hoarau ◽  
Janne E. Søreide
Keyword(s):  
Calanus Finmarchicus ◽  
Calanus Glacialis

scholarly journals Ocean acidification does not alter grazing in the calanoid copepods Calanus finmarchicus and Calanus glacialis

2015 ◽  
Vol 73 (3) ◽  
pp. 927-936 ◽  
Author(s):  
Nicole Hildebrandt ◽  
Franz J. Sartoris ◽  
Kai G. Schulz ◽  
Ulf Riebesell ◽  
Barbara Niehoff
Keyword(s):  
Body Mass ◽  
Calanus Finmarchicus ◽  
High Pco2 ◽  
Calanoid Copepods ◽  
Additional Energy ◽  
Ingestion Rates ◽  
Energy Demands ◽  
Seawater Ph ◽  
Calanus Glacialis ◽  
Acid Base Status

Abstract It is currently under debate whether organisms that regulate their acid–base status under environmental hypercapnia demand additional energy. This could impair animal fitness, but might be compensated for via increased ingestion rates when food is available. No data are yet available for dominant Calanus spp. from boreal and Arctic waters. To fill this gap, we incubated Calanus glacialis at 390, 1120, and 3000 µatm for 16 d with Thalassiosira weissflogii (diatom) as food source on-board RV Polarstern in Fram Strait in 2012. Every 4 d copepods were subsampled from all CO2 treatments and clearance and ingestion rates were determined. During the SOPRAN mesocosm experiment in Bergen, Norway, 2011, we weekly collected Calanus finmarchicus from mesocosms initially adjusted to 390 and 3000 µatm CO2 and measured grazing at low and high pCO2. In addition, copepods were deep frozen for body mass analyses. Elevated pCO2 did not directly affect grazing activities and body mass, suggesting that the copepods did not have additional energy demands for coping with acidification, neither during long-term exposure nor after immediate changes in pCO2. Shifts in seawater pH thus do not seem to challenge these copepod species.

The Copepods Calanus glacial is Jaschnov and Calanus finmarchicus (Gunnerus) in Canadian Arctic-Subarctic Waters

1961 ◽  
Vol 18 (5) ◽  
pp. 663-678 ◽  
Author(s):  
E. H. Grainger
Keyword(s):  
North America ◽  
North Atlantic ◽  
Canadian Arctic ◽  
Atlantic Water ◽  
Calanus Finmarchicus ◽  
Subarctic Region ◽  
The North ◽  
Calanus Glacialis ◽  
History Of ◽  
The North Atlantic

The literature on Calanus finmarchicus (Gunnerus) in arctic-subarctic Canada is reviewed, and the history of the 2-size-group phenomenon in the North Atlantic subarctic region is discussed. Calanus glacialis Jaschnov is briefly described, and compared with material from North America, the characters emphasized being size and the structure of the fifth legs. It is concluded that specimens from arctic and subarctic North America agree essentially with C. glacialis, those from the subarctic and north boreal regions with C. finmarchicus. Occurrence of the 2 species in northern North America is given, that of the large glacialis alone being shown to coincide closely with the known extent of unmixed polar water, of the 2 together to occupy the region of mixed polar and Atlantic water, and of the small finmarchicus alone to inhabit Atlantic water.

scholarly journals The relationship between plankton, capelin, and cod under different temperature conditions

2005 ◽  
Vol 62 (7) ◽  
pp. 1281-1292 ◽  
Author(s):  
E.L. Orlova ◽  
V.D. Boitsov ◽  
A.V. Dolgov ◽  
G.B. Rudneva ◽  
V.N. Nesterova
Keyword(s):  
Species Distribution ◽  
Phytoplankton Bloom ◽  
Calanus Finmarchicus ◽  
Feeding Intensity ◽  
Sea Temperature ◽  
Northern Areas ◽  
Calanus Glacialis ◽  
Reproductive Processes ◽  
The Relationship ◽  
Prey Overlap

Abstract On the basis of data from cold (1982 and 1987) and warm summers (1983, 1984, 1990, and 1992), we explore the relationship between the phytoplankton bloom and the timing and intensity of the zooplankton bloom. In warm years, there is more overlap in the time between the zooplankton and the phytoplankton bloom. In northern areas (76–78°N) with seasonal ice, the phytoplankton bloom and reproductive processes in Calanus finmarchicus and Calanus glacialis continue well into August, evidenced by the presence of an abundance of nauplii and younger copepodites. We analyse feeding intensity of capelin and its distribution relative to food availability and capelin abundance. The extent to which feeding areas of cod and capelin, its major prey, overlap is subject to the abundance of these species, distribution of zooplankton, and sea temperature in a given year.

scholarly journals Mitochondrial genomes of the key zooplankton copepods Arctic Calanus glacialis and North Atlantic Calanus finmarchicus with the longest crustacean non-coding regions

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Agata Weydmann ◽  
Aleksandra Przyłucka ◽  
Marek Lubośny ◽  
Katarzyna S. Walczyńska ◽  
Ester A. Serrão ◽  
...  
Keyword(s):  
North Atlantic ◽  
Calanus Finmarchicus ◽  
Mitochondrial Genomes ◽  
Coding Regions ◽  
Calanus Glacialis

Lipids and life strategies of Calanus finmarchicus , Calanus glacialis and Calanus hyperboreus in late autumn, Kongsfjorden, Svalbard

Polar Biology ◽  
2000 ◽  
Vol 23 (7) ◽  
pp. 510-516 ◽  
Author(s):  
Catherine L. Scott ◽  
S. Kwasniewski ◽  
Stig Falk-Petersen ◽  
John R. Sargent
Keyword(s):  
Calanus Finmarchicus ◽  
Life Strategies ◽  
Late Autumn ◽  
Calanus Glacialis ◽  
Calanus Hyperboreus
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