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Publikováno v:
Canadian Journal of Zoology. 86:1225-1234
Mammalian young are especially vulnerable to harm because of their small size, poorly developed survival skills, and strong dependence on maternal care. Tactics for rearing young, including avoiding harm, vary largely by environment type. Off Kaikour
Autor:
Mary L. Moser, U. G. ReinhardtU.G. Reinhardt, S. E. FriedlS.E. Friedl, L. EidietisL. Eidietis
Publikováno v:
Canadian Journal of Zoology. 86:1264-1272
New lamprey-friendly fishways feature inclined ramps that facilitate passage of Pacific lampreys ( Lampetra tridentata (Richardson, 1836)) over Bonneville Dam on the Columbia River, USA. We observed the lampreys moving against water at two flow volum
Publikováno v:
Canadian Journal of Zoology. 86:1121-1130
Using a natural population of masu salmon ( Oncorhynchus masou (Brevoort, 1856)) in a stream of Shikaribetsu Lake, Hokkaido, Japan, we combined behavioural observations with genetic parentage analysis to explore the factors affecting fertilization su
Publikováno v:
Canadian Journal of Zoology. 86:1002-1014
Variation at 14 microsatellite loci was surveyed in 205 populations of chum salmon ( Oncorhynchus keta (Walbaum in Artedi, 1792)) from British Columbia to determine population structure and the possible application of microsatellites to estimate stoc
Publikováno v:
Canadian Journal of Zoology. 86:525-538
We compiled age estimates and baleen plate δ13C data from 86 bowhead whales ( Balaena mysticetus L., 1758). We used previous whale age estimates based on aspartic acid racemization (AAR) and corpora counts to extend the use of δ13C data for age det
Autor:
G. Van Der Kraak, J. M. Shrimpton, M. T. Mathes, Scott G. Hinch, Srm Jones, Rosalind A. Leggatt, David A. Patterson, Anthony P. Farrell, Andrew G. Lotto, Steven J. Cooke, David Welch, Glenn T. Crossin
Publikováno v:
Canadian Journal of Zoology. 86:127-140
Since 1996, some populations of Fraser River sockeye salmon ( Oncorhynchus nerka Walbaum in Artedi, 1792) have begun spawning migrations weeks earlier than normal, and most perish en route as a result. We suspect that a high midsummer river temperatu
Publikováno v:
Canadian Journal of Zoology. 85:1125-1135
Eurasian otter, Lutra lutra (L., 1758), spraints collected at the Aguieira hydroelectric dam (central Portugal, n = 916) and tributaries (n = 412) were analysed to assess diet compared with prey availability. Fish and crayfish abundances in the reser
Publikováno v:
Canadian Journal of Zoology. 85:488-496
Over-snow vehicles are used extensively at Antarctic scientific research stations. Adult female Weddell seals ( Leptonychotes weddellii (Lesson, 1826)) also utilise the fast-ice and are therefore often exposed to vehicular activity, with the potentia
Publikováno v:
Canadian Journal of Zoology. 85:290-294
The US National Oceanic and Atmospheric Administration established a buffer zone around marine mammals to prevent harassment. The buffer zone varies by species listing status and by geographic area. However, it is unknown the extent to which vessels
Publikováno v:
Canadian Journal of Zoology. 85:1-15
Nine prey species (n = 7431) were fed to four captive female Steller sea lions ( Eumetopias jubatus (Schreber, 1776)) in 11 feeding trials over 75 days to investigate the effectiveness of different methods used to determine diet from prey hard remain