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pro vyhledávání: '"Geoff A. Black"'
Autor:
Geoff A. Black
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 40:643-647
Cystidicola stigmatura (Leidy, 1886) Ward and Magath, 1917 is considered a valid species after examination of specimens from Leidy's collection. Cystidicola cristivomeri White, 1941 is considered a synonym of C. stigmatura. Cystidicola stigmatura is
Autor:
Geoff A. Black, Murray W. Lankester
Publikováno v:
Canadian Journal of Zoology. 59:498-509
The population biology of Cystidicola cristivomeri White, 1941 was investigated in lake trout, Salvelinus namaycush, in three lakes in northwestern Ontario and in arctic char, S. alpinus, in Gaviafaeces Lake, Northwest Territories. Young lake trout f
Autor:
Geoff A. Black
Publikováno v:
Canadian Journal of Zoology. 59:1892-1896
Changes in the numbers of metazoan parasites of anadromous brook charr, Salvelinus fontinalis, during the summer 1980 were determined by examining 220 fish at different times and localities in the Moisie River, Quebec. The marine trematode Brachyphal
Autor:
Geoff A. Black, W. Linn Montgomery, Frederick G. Whoriskey, Stephen D. McCormick, Robert J. Naiman
Publikováno v:
Canadian Journal of Zoology. 61:2495-2502
During May–June 1980 and June–July 1982, six fish species exited Rivière à la Truite, a major tributary of the lower Moisie River, Quebec, in highly synchronized emigrations. Species included longnose sucker (Catostomus catostomus), white sucke
Autor:
Murray W. Lankester, Geoff A. Black
Publikováno v:
Canadian Journal of Zoology. 59:1454-1457
Ninety-five deepwater sculpin, Myoxocephalus quadricornis thompsonii (Girard), sampled from Burchell Lake, Ontario, 12 October 1980, were up to 92 mm long. Ninety-eight percent of the specimens were less than 4 years old. Some 2-year-old males had en
Autor:
Geoff A. Black
Publikováno v:
Canadian Journal of Zoology. 63:617-622
The reproductive output and population biology of the swim bladder nematode, Cystidicola stigmatura, were examined in Salvelinus alpinus in Gavia Lake, Northwest Territories, Canada. The size and number of gravid female nematodes increased with fish
Autor:
Geoff A. Black
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 40:1244-1253
New distributional records indicate that Cystidicola stigmatura occurs in lake trout (Salvelinus namaycush) and Arctic char (S. alpinus) in the Great Lakes and St. Lawrence River drainage basins, in lakes along an arc extending from northwestern Onta
Publikováno v:
Canadian Journal of Zoology. 64:21-31
The voluminous literature on the freshwater and diadromous fishes of Labrador is summarized in distributional maps. A total of 25 obligate freshwater spawning and one catadromous species has been reported. Fishes from Atlantic and Mississippi refugia
Autor:
J. Brian Dempson, Geoff A. Black
Publikováno v:
Environmental Biology of Fishes. 15:229-235
We tested the hypothesis that anadromous salmonids are guided on their homeward migration by population-specific pheromones. Our findings do not support the hypothesis. Wild migrant Arctic charr,Salvelinus alpinus, from Ikarut River, Labrador were tr
Autor:
Geoff A. Black, Murray W. Lankester
Publikováno v:
Canadian Journal of Zoology. 58:1997-2005
Third-stage larvae of Cystidicola cristivomeri White, 1941, and C. farionis Fischer, 1798, migrated directly via the pneumatic duct to the swim bladder of lake trout, Salvelinus namaycush, and rainbow trout, Salmo gairdneri, respectively. Larvae reac