Zobrazeno 1 - 10
of 20
pro vyhledávání: '"David A. Methven"'
Publikováno v:
ICES Journal of Marine Science. 60:38-51
We tested the hypothesis that patchiness increases after settlement to the bottom in a marine broadcast spawner, the Atlantic cod Gadus morhua. Patchiness P=1+1/k was estimated from the dispersion parameter k of the negative binomial distribution. Es
Publikováno v:
Estuarine, Coastal and Shelf Science. 52:669-687
Twice monthly sampling over two 16 month periods at a shallow site on Newfoundland's east coast showed the fish assemblage to be dominated by four taxa (Gasterosteus aculeatus, G. wheatlandi, Osmerus mordax, Gadus spp.) that accounted for 96% of the
Autor:
David C. Schneider, David A. Methven, Danny W. Ings, Robert S. Gregory, Vytenis Gotceitas, Tammo P. Bult
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 56:180-187
The problem of scaling spatially and temporally limited data to larger scale questions can no longer be ignored as evidence accumulates that the importance of any given process, relative to another, depends on spatial and temporal scale. A recently d
Publikováno v:
Environmental Biology of Fishes. 54:413-420
This study examined the effects of body size and food ration on over-winter survival of age-0 Atlantic cod. Cod were divided into two groups based on standard length (large=76.95±1.10 mm SL; small=57.65±1.02 mm SL; mean±1 SE) and wet weight (large
Autor:
David C. Schneider, David A. Methven
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 55:1430-1442
Habitat and size of juvenile Atlantic cod (Gadus morhua) change substantially during the first 3 years after settlement, and hence, cohort size cannot be followed using a single gear. We investigated whether catch could be calibrated across gear type
Autor:
David A. Methven, Colin McGowan
Publikováno v:
Canadian Journal of Zoology. 76:1054-1062
Two biochemical, 7 meristic, and 14 morphometric characters in addition to total body mass were examined to determine which characters best distinguish demersal Gadus ogac from Gadus morhua over the size range 87-135 mm standard length. These congene
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 54:25-29
Publikováno v:
Polar Biology. 16:201-207
We tested three hypotheses concerning the timing of spawning for a circumpolar species, capelin (Mallotus villosus), for which timing of larval emergence is known to be synchronized by physical conditions. The first hypothesis, developed from previou
Autor:
David A. Methven, Christopher Bajdik
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 51:78-90
Temporal variability in abundance and size of juvenile Atlantic cod (Gadus morhua) was studied at a shallow-water site in Trinity Bay, Newfoundland, from July 1982 to September 1983 and July 1989 to September 1990. Cod were collected with a small sei
Autor:
Birgitta Norberg, David A. Methven, Gregory P. Goff, Laurence W. Crim, Ingvar Huse, Joseph A. Brown
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 49:754-759
Atlantic halibut (Hippoglossus hippoglossus) collected off Newfoundland first mature at about 80 cm fork length (FL) for males and about 115–120 cm FL for females. Captive Newfoundland halibut did not release milt or eggs or have detectable levels