Biomagnification of polychlorinated biphenyls in a harbor seal (Phoca vitulina) food web from the strait of Georgia, British Columbia, Canada

2012 ◽  
Vol 31 (11) ◽  
pp. 2445-2455 ◽  
Author(s):  
Donna L. Cullon ◽  
Mark B. Yunker ◽  
Jennie R. Christensen ◽  
Robie W. Macdonald ◽  
Michael J. Whiticar ◽  
...  
Keyword(s):  
British Columbia ◽  
Polychlorinated Biphenyls ◽  
Food Web ◽  
Harbor Seal ◽  
Phoca Vitulina ◽  
Strait Of Georgia

GROWTH AND DEVELOPMENT IN FREE-RANGING HARBOR SEAL (PHOCA VITULINA) PUPS FROM SOUTHERN BRITISH COLUMBIA, CANADA

2002 ◽  
Vol 18 (3) ◽  
pp. 721-733 ◽  
Author(s):  
Paul E. Cottrell ◽  
Steven Jeffries ◽  
Brian Beck ◽  
Peter S. Ross
Keyword(s):  
British Columbia ◽  
Growth And Development ◽  
Harbor Seal ◽  
Phoca Vitulina ◽  
Free Ranging

Clear diel patterns in breeding calls of harbor seals (Phoca vitulina) at Hornby Island, British Columbia, Canada

2018 ◽  
Vol 96 (11) ◽  
pp. 1236-1243
Author(s):  
Katrina Nikolich ◽  
Héloïse Frouin-Mouy ◽  
Alejandro Acevedo-Gutiérrez
Keyword(s):  
British Columbia ◽  
Foraging Behavior ◽  
Breeding Season ◽  
Light Level ◽  
Harbor Seal ◽  
Phoca Vitulina ◽  
Harbor Seals ◽  
Female Behavior ◽  
Nocturnal Foraging ◽  
Male Calling

During the breeding season, male harbor seals (Phoca vitulina Linnaeus, 1758) produce underwater calls for sexual advertisement. The daily and seasonal timing of these calls is influenced by female availability (i.e., tidal haul-out patterns, foraging behavior, and oestrus cycle). Therefore, temporal patterns of male calling can provide clues about patterns of female behavior. We collected underwater recordings during the 2014 breeding season at Hornby Island, British Columbia, Canada, and examined the relationships of light level, progression of breeding season, and tide relative to call presence or absence and calling rate. Calls were 15 times more likely to occur at night than during the day. Nocturnal peaks in calling rate have been observed in other harbor seal populations and have been attributed to tidal haul-out patterns and nocturnal foraging of females. In this study, tide level did not have a significant effect on calling rate, and female foraging behavior was not monitored. One acoustic observation of mammal-eating killer whale (Orcinus orca (Linnaeus, 1758)) calls was followed by 48 h of decreased calling rate. We infer that predation risk influences the temporal pattern of male calling at this location and suggest further study to support this hypothesis.

Recent Trends in the Abundance of Harbour Seals, Phoca vitulina, in British Columbia

1990 ◽  
Vol 47 (5) ◽  
pp. 992-1003 ◽  
Author(s):  
Peter F. Olesiuk ◽  
Michael A. Bigg ◽  
Graeme M. Ellis
Keyword(s):  
British Columbia ◽  
Vancouver Island ◽  
Phoca Vitulina ◽  
Primary Study ◽  
Relative Distribution ◽  
Strait Of Georgia ◽  
Queen Charlotte Islands ◽  
Harbour Seals ◽  
Recent Trends ◽  
Skeena River

Aerial censuses of harbour seals (Phoca vituiina) were conducted in the Strait of Georgia (1966–88), the lower Skeena River (1977–87), off the southwest coast of Vancouver island (1976–87), off the northeast coast of the Queen Charlotte Islands (1986), in Jervis Inlet (1987), and at the entrance to Queen Charlotte Strait (1988). The estimated number of seals in the Strait of Georgia, the primary study area, increased from 2170 in 1973 to 15 810 in 1988; the number in the lower Skeena River from 520 in 1977 to 1590 in 1987; and the number off south western Vancouver Island from 210 in 1976 to 1130 in 1987. The trends indicated that populations throughout British Columbia had been increasing at a rate of about 12.5% ∙yr−1 since 1973. Based on the density of seals in the areas surveyed, and the relative distribution of bounty and commercial kills, the total post-pupping population in British Columbia was estimated to have numbered 75 000–88 000 in 1988, compared with 9000–10 500 when the species was protected in 1970. Despite the recent increases, which probably reflect the recovery from historic kills, there was no evidence of density-dependent changes in the population growth rate.

Comparison of the effect of anoxic anoxia and apnea on renal function in the harbor seal (Phoca vitulina, L.)

1956 ◽  
Vol 48 (1) ◽  
pp. 35-49 ◽  
Author(s):  
Preston B. Lowrance ◽  
James F. Nickel ◽  
Cheves McC. Smythe ◽  
Stanley E. Bradley
Keyword(s):  
Renal Function ◽  
Harbor Seal ◽  
Phoca Vitulina

scholarly journals Upper-crustal structure beneath the Strait of Georgia, Southwest British Columbia

2007 ◽  
Vol 170 (2) ◽  
pp. 800-812 ◽  
Author(s):  
R. K. Dash ◽  
G. D. Spence ◽  
M. Riedel ◽  
R. D. Hyndman ◽  
T. M. Brocher
Keyword(s):  
British Columbia ◽  
Crustal Structure ◽  
Strait Of Georgia
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