An Arctic fairy shrimp (Artemiopsis stefanssoni Johansen 1921) in southern Alberta, with a note on the genus Artemiopsis

1968 ◽  
Vol 46 (3) ◽  
pp. 423-425 ◽  
Author(s):  
R. Hartland-Rowe ◽  
R. S. Anderson
Keyword(s):  
The Arctic ◽  
Fairy Shrimp ◽  
Southern Alberta ◽  
Artemiopsis Stefanssoni

The Arctic fairy shrimp Artemiopsis stefanssoni Johansen 1921 is reported from southern Alberta. Artemiopsis stefanssoni groenlandicus Linder 1932 is regarded as synonymous with the nominate species. A. stefanssoni is briefly compared with A. bungei Sars 1897.

scholarly journals Dancing around the pole: holarctic phylogeography of the Arctic fairy shrimp Branchinecta paludosa (Anostraca, Branchiopoda)

Hydrobiologia ◽  
2016 ◽  
Vol 772 (1) ◽  
pp. 189-205 ◽  
Author(s):  
Markus Lindholm ◽  
Marc Anglès d’Auriac ◽  
Jens Thaulow ◽  
Anders Hobæk
Keyword(s):  
The Arctic ◽  
Fairy Shrimp ◽  
Branchinecta Paludosa

On the distribution and biology of an arctic fairy shrimp Artemiopsis stefanssoni Johansen, 1921 (Crustacea: Anostraca)

1977 ◽  
Vol 55 (2) ◽  
pp. 280-287 ◽  
Author(s):  
Graham R. Daborn
Keyword(s):  
Body Size ◽  
Food Availability ◽  
Egg Production ◽  
Fairy Shrimp ◽  
Baffin Island ◽  
Egg Predation ◽  
Genital Opening ◽  
Somerset Island ◽  
Artemiopsis Stefanssoni ◽  
Branchinecta Paludosa

The distribution of Artemiopsis stefanssoni is described. Samples from eight localities in Baffin Island and Somerset Island were analysed and showed wide variations between populations in body size and egg production. These variations probably correspond to variations in food availability. Maximum lengths recorded were 9.00 mm for males and 11.95 mm for females. The egg sac of this species has no genital opening. Successive clutches are retained within the egg sac instead of being released after fertilisation and deposition of the tertiary shell. Egg sacs contained up to 120 eggs, whereas maximum ovary output was 40 eggs per clutch. It is suggested that retention of eggs within the egg sac affords protection against egg predation by benthic feeders such as Branchinecta paludosa and Lepidurus arcticus.

Is distribution of cold stenotherms constrained by temperature? The case of the Arctic fairy shrimp (Branchinecta paludosa O.F. Müller 1788)

2015 ◽  
Vol 53 ◽  
pp. 46-52 ◽  
Author(s):  
M. Lindholm ◽  
D.O. Hessen ◽  
P.J. Færøvig ◽  
B. Rognerud ◽  
T. Andersen ◽  
...  
Keyword(s):  
The Arctic ◽  
Fairy Shrimp ◽  
Branchinecta Paludosa

Cretaceous (Albian–Turonian) foraminiferal biostratigraphy and paleogeography of northern Montana and southern Alberta

1988 ◽  
Vol 25 (2) ◽  
pp. 316-342 ◽  
Author(s):  
Harold R. Lang ◽  
Alan McGugan
Keyword(s):  
Cross Sections ◽  
The Arctic ◽  
Tectonic Activity ◽  
Planktonic Foraminifer ◽  
The West ◽  
Isopach Maps ◽  
Southern Alberta ◽  
International Border ◽  
North And South ◽  
East West

In Albian–Turonian time, the interior of North America was flooded by a seaway extending from the present Gulf of Mexico to the Arctic Ocean. Detailed studies of this interval north and south of the Canada – United States international border have not usually been integrated. The present foraminiferal biostratigraphic study includes a 38 000 km2 area straddling the Alberta–Montana border from the Lewis thrust in the west to the Sweetgrass Hills in the east, including the Sweetgrass Arch.Stratigraphic cross sections and isopach maps of six Albian – early Turonian stratigraphic units prepared from 57 surface and subsurface sections demonstrate that sedimentation was controlled primarily by (i) sporadic volcanism to the west and (ii) tectonic activity coincident with the present location of the Sweetgrass Arch.The occurrence of the late Cenomanian planktonic foraminifer, Rotalipora cushmani, in association with three other keeled species, suggests an east–west marine connection between the eastern Pacific and Western Interior. This interpretation is consistent with the facies model described by Kauffman, the paleogeographic model developed in the present study, reported gastropod paleozoogeographic data, and reevaluation of pelecypod and ammonite paleozoogeographic interpretations.

Occurrence of an arctic fairy shrimp Polyartemiella hazeni (Murdoch) 1884 (Crustacea: Anostraca) in Alberta and Yukon Territory

1976 ◽  
Vol 54 (11) ◽  
pp. 2026-2028 ◽  
Author(s):  
Graham R. Daborn
Keyword(s):  
Rainbow Trout ◽  
New Records ◽  
Stomach Contents ◽  
Yukon Territory ◽  
Range Extension ◽  
The Arctic ◽  
Fairy Shrimp ◽  
Single Male

New records are reported for the arctic fairy shrimp Polyartemiella hazeni (Murdoch) 1884 in Yukon Territory and Alberta. The Alberta record, a single male from stomach contents of a rainbow trout, represents a range extension of more than 1600 km, but the population could not be located. Distribution of the species is summarized.

A Late Cretaceous Microfossil Assemblage from the Buffalo Head Hills, North-Central Alberta

1975 ◽  
Vol 12 (7) ◽  
pp. 1157-1174 ◽  
Author(s):  
John H. Wall ◽  
Chaitanya Singh
Keyword(s):  
The Arctic ◽  
Pollen Assemblage ◽  
North Central ◽  
Radiolarian Assemblage ◽  
Southern Alberta ◽  
Corroborative Evidence ◽  
Northern Alaska ◽  
Microfossil Assemblage ◽  
Northern Alberta ◽  
Upper Campanian

A small outcrop belonging to an unnamed shale unit in the Buffalo Head Hills of north-central Alberta has yielded marine microfossils of Senonian, most probably Campanian, age.The foraminiferal fauna, including Haplophragmoides fraseri, Verneuilinoides bearpawensis, Praebulimina carseyae and Cassidella tegulata, suggests equivalence with that of the upper Campanian Bearpaw fauna of southern Alberta.The radiolarian assemblage includes Spongurus (Spongurantha) sp., Spongodiscus (Spongodisus) sp. cf. S. (S.) renillaeformis, Spongostaurus sp., Spongotripus (Spongotripus) sp. cf. S. (S.) morenoensis and Dictyomitra (Dictyomitra) multicostata, which are present in the Bearpaw Formation of southern Alberta, and in an interval of the Schrader Bluff Formation of northern Alaska, considered middle Senonian in age.Among the dinoflagellates recorded from the outcrop, three species of Dinogymnium – D. acuminatum, D. longicornis and D. sibiricum, and four species of Deflandrea – D. granulifera, D. minor, D. spectabilis and D. victoriensis are restricted to strata of Senonian age (inclusive of Maestrichtian Stage). Of this group, Dinogymnium longicornis, Deflandrea granulifera and D. spectabilis are present in the Bearpaw Formation of southern Alberta. The dinoflagellate assemblage has four species in common with that of the Senonian or younger beds in western Siberia.The pollen assemblage is dominated by species of Aquilapollenites – A. dolium, A. trialatus and A. turbidus – strongly indicative of a Campanian age. A megaspore, Balmeisporites rarus, suggests a Senonian age.The microfossil assemblage provides corroborative evidence in support of J. A. Jeletzky's hypothesis that a marine connection existed between the Arctic and Western Interior regions through northern Alberta during the Santonian and Campanian.

The ultrastructure of the double membrane-bound bodies and endoplasmic reticulum in serial sections of wheat spot mosaic-affected wheat plants

1990 ◽  
Vol 48 (3) ◽  
pp. 694-695
Author(s):  
M. H. Chen ◽  
C. Hiruki
Keyword(s):  
Endoplasmic Reticulum ◽  
High Resolution ◽  
Membrane Structure ◽  
Mosaic Disease ◽  
Serial Sections ◽  
Thin Sections ◽  
Double Membrane ◽  
Southern Alberta ◽  
Membrane Bound ◽  
Scanning Em

Wheat spot mosaic disease was first discovered in southern Alberta, Canada, in 1956. A hitherto unidentified disease-causing agent, transmitted by the eriophyid mite, caused chlorosis, stunting and finally severe necrosis resulting in the death of the affected plants. Double membrane-bound bodies (DMBB), 0.1-0.2 μm in diameter were found to be associated with the disease.Young tissues of leaf and root from 4-wk-old infected wheat plants were fixed, dehydrated, and embedded in Spurr’s resin. Serial sections were collected on slot copper grids and stained. The thin sections were then examined with a Hitachi H-7000 TEM at 75 kV. The membrane structure of the DMBBs was studied by numbering them individually and tracing along the sections to see any physical connection with endoplasmic reticulum (ER) membranes. For high resolution scanning EM, a modification of Tanaka’s method was used. The specimens were examined with a Hitachi Model S-570 SEM in its high resolution mode at 20 kV.

The Arctic Climate System

2005 ◽  
Author(s):  
Mark C. Serreze ◽  
Roger G. Barry
Keyword(s):  
Climate System ◽  
Arctic Climate ◽  
The Arctic
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