Zobrazeno 1 - 10
of 34
pro vyhledávání: '"R. Stewart Anderson"'
Autor:
David B. Donald, R. Stewart Anderson
Publikováno v:
Ecology. 84:2387-2394
Species and their abundances change along environmental gradients, and populations of some species are decimated by introductions of foreign species. We show that the prey-to-predator species ratio is resistant to change. We determined that ratios we
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 58:1822-1830
Impacts of introduced fish on zooplankton assemblages of lakes may persist for decades following fish removal. We tested this hypothesis by comparing zooplankton assemblages from four categories of lakes located in western Canadian mountain parks inc
Publikováno v:
Canadian Journal of Zoology. 72:259-261
In western Canada, the large diaptomids Hesperodiaptomus arcticus and (or) H. shoshone (> 2.5 mm) usually coexist with fish in large subalpine and alpine lakes located 1800 – 2455 m above sea level, but not in small lakes with area 2–16 ha and ma
Autor:
R. Stewart Anderson, Dwight R. Mudry
Publikováno v:
Journal of Fish Biology. 11:21-33
Sixteen parasite species including one monogenean, two digeneans, five cestodes, six nematodes. one acanthocephalan, and one copepod were collected from 257 fish of 13 species examined from 32 lake and nine stream sites in the mountain National Parks
Autor:
R. Stewart Anderson
Publikováno v:
Journal of the Fisheries Research Board of Canada. 31:855-869
The crustacean plankton communities of 340 lakes and ponds in southern Alberta and southeastern British Columbia were examined. The waters are situated between 660 m and 2455 m in elevation, have areas from
Publikováno v:
Canadian Journal of Zoology. 56:440-445
Four species of Hexarthra are reported from ponds and lakes in western Canada. Two Rocky Mountain forms are described as new subspecies: Hexarthra bulgarica canadensis n.subsp., at high altitudes, and Hexarthra polyodonta jasperina n.subsp. The nomin
Publikováno v:
Ecography. 3:50-63
Leptodiaptomus sicilis (S. A. Forbes 1882) in Pyramid Lake, Alberta, Canada, has only one main generation per year. A small summer generation probably does not survive. Adults may persist for 7 to 12 months, and individual copepods may live for up to
Publikováno v:
Hydrobiologia. 70:257-264
The numbers and biomass of meiobenthic invertebrates of nine representative mountain lakes were assessed relative to the macrobenthic invertebrates retained on 0.425 mm mesh. The meiobenthos accounted for an average of % MathType!MTEF!2!1!+-% feaafia
Autor:
Roderick B. Green, R. Stewart Anderson
Publikováno v:
SIL Proceedings, 1922-2010. 19:571-579
Autor:
R. Stewart Anderson
Publikováno v:
Canadian Journal of Zoology. 48:41-47
The occurrence of Diaptomus connexus Light 1938 in Alberta is reported. Comparative examination of specimens from Saskatchewan indicate that the species occurs there also. Specimens of D. siciloides Lilljeborg 1889 from widespread parts of North Amer