Results 261 to 270 of about 52,059 (298)

Circumpolar genetic population structure of polar cod, Boreogadus saida

Polar Biology, 2020
Polar cod, Boreogadus saida, is an important part of Arctic and boreal marine ecosystems. Knowledge of polar cod population genetic structuring can provide insight into how the species may respond to environmental change, and allow for establishment of meaningful management units. To examine population genetic structure of B.
R. J. Nelson, C. Bouchard, L. Fortier, A. R. Majewski, J. D. Reist, K. Præbel, M. L. Madsen, G. A. Rose, S. T. Kessel, G. J. Divoky   +9 more
openaire   +1 more source

The polar cod of Porsangerfjorden, Norway; revisited

Sarsia, 2000
Abstract The polar cod, Boreogadus saida (Lepechin, 1774) (Gadidae), is a genuinely arctic fish species, which was recorded from Norwegian waters, i.e. the Austerbotn Basin of Porsangerfjorden, for the first time in 1967. Whether the polar cod in Austerbotn are strays from arctic waters or represent a population of its own is a matter of debate.
Jörgen Schou Christiansen, Svein-Erik Fevolden   +1 more
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Spawning and development of Polar cod

2022
Three genera of gadoid fishes — Eleginus, Arctogadus and Boreogadus — are represented in the cold seas of the Arctic Ocean. Their species are marine fish but their life is connected with brackish waters, as rightly indicated by Zenkevitch in 1933. Eleginus navaga, the navaga, approaches the shores and enters the lower part of the rivers before spawning,
openaire   +1 more source

Is the poleward expansion by Atlantic cod and haddock threatening native polar cod, Boreogadus saida?

Polar Biology, 2011
During a recent period of increased influx of warm Atlantic water to the western coast of Svalbard, we have observed a northward expansion of boreal Atlantic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) into areas dominated by the native polar cod (Boreogadus saida).
Renaud, P.E., J. Berge, Ø. Varpe, O.J. Lønne, J. Nahrgang, C. Ottesen, I. Hallanger   +7 more
openaire   +1 more source

Ichthyoplankton of Russian Arctic Seas: 1. Polar cod Boreogadus saida

Journal of Ichthyology, 2018
The information on the size composition and distribution of the larvae and juveniles of polar cod Boreogadus saida on the shelf of Russian Arctic seas (the Kara Sea, the Laptev Sea, and the East Siberian Sea) is presented for the period of July–September 2015–2017.
A. V. Mishin, S. A. Evseenko, D. V. Bol’shakov, Ya. Yu. Bol’shakova   +3 more
openaire   +1 more source

Isolation and characterization of pepsin from polar cod (Boreogadus saida)

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1985
1. 1. Two zymogens of pepsin, pepsinogens A and B, were isolated from the gastric mucosa from Polar cod. Pepsins A and B accounted for more than 90% of the total pepsin units obtained in the crude extract of the mucosa. 2. 2. Pepsinogen A had a mol. wt of 42,000 and a P1 of 3.75. With hemoglobin as substrate, pepsin A had pH optimum of 2.0, a Km′
K. Arunchalam, N.F. Haard
openaire   +1 more source

Biomarker responses in polar cod (Boreogadus saida) exposed to dietary crude oil

Aquatic Toxicology, 2010
Polar cod Boreogadus saida were exposed weekly to two doses of dietary crude oil for 4 weeks followed by 2 weeks of depuration. Administered doses corresponded on average to 4 and 9microgSigmaPAHsg(-1)fishweek(-1). Cytochrome P4501A1 (cyp1a1) and glutathione S-transferase (gst) mRNA expression, ethoxyresorufin O-deethylase (EROD) activity and ...
Jasmine, Nahrgang, Lionel, Camus, Patrice, Gonzalez, Martina, Jönsson, Jørgen S, Christiansen, Haakon, Hop   +5 more
openaire   +2 more sources

PAH biomarker responses in polar cod (Boreogadus saida) exposed to benzo(a)pyrene

Aquatic Toxicology, 2009
With expanding oil and gas activities into the Arctic region, there is a need to evaluate the induction capacity of polycyclic aromatic hydrocarbon (PAH) biomarkers on Arctic marine organisms and to test analytical methods that have been optimized for their temperate counterparts.
Nahrgang, Jasmine, Camus, Lionel, Gonzalez, Patrice, Goksøyr, Anders, Christiansen, Jørgen S., Hop, Haakon   +5 more
openaire   +3 more sources

Feeding of Polar cod Boreogadus saida in the Kara Sea

Journal of Ichthyology, 2017
In the summer–autumn period of 2007, 2010, and 2013, the peculiarities of Polar cod feeding Boreogadus saida in the Kara Sea were considered. In these years, the intensity of feeding of adult individuals was quite similar. Spatial and interannual differences in the composition of the food have been observed.
openaire   +1 more source