MERCURY AND OTHER TRACE ELEMENTS IN FARMED AND WILD SALMON FROM BRITISH COLUMBIA, CANADA

2008 ◽  
Vol 27 (6) ◽  
pp. 1361 ◽  
Author(s):  
Barry C. Kelly ◽  
Michael G. Ikonomou ◽  
David A. Higgs ◽  
Janice Oakes ◽  
Cory Dubetz
Keyword(s):  
British Columbia ◽  
Trace Elements ◽  
Wild Salmon

MERCURY AND OTHER TRACE ELEMENTS IN FARMED AND WILD SALMON FROM BRITISH COLUMBIA, CANADA

2007 ◽  
Vol preprint (2008) ◽  
pp. 1 ◽  
Author(s):  
Barry Kelly ◽  
Michael Ikonomou ◽  
David Higgs ◽  
Janice Oakes ◽  
Cory Dubetz
Keyword(s):  
British Columbia ◽  
Trace Elements ◽  
Wild Salmon

scholarly journals Origin identification of migratory pests (European Starling) using geochemical fingerprinting

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e8962
Author(s):  
Upama Khatri-Chhetri ◽  
John G. Woods ◽  
Ian R. Walker ◽  
P. Jeff Curtis
Keyword(s):  
British Columbia ◽  
Trace Elements ◽  
Large Scale ◽  
Geographic Origin ◽  
Dairy Farms ◽  
European Starling ◽  
Northern Region ◽  
Stepwise Discriminant Analysis ◽  
Natal Origin ◽  
South Central

The European Starling (Sturnidae: Sturnus vulgaris L.) is an invasive bird in North America where it is an agricultural pest. In British Columbia (Canada), the starling population increases in orchards and vineyards in autumn, where they consume and damage ripening fruits. Starlings also cause damage in dairy farms and feedlots by consuming and contaminating food and spreading diseases. Damage can be partly mitigated by the use of scare devices, which can disperse flocks until they become habituated. Large-scale trapping and euthanizing before starlings move to fields and farms could be a practical means of preventing damage, but requires knowledge of natal origin. Within a small (20,831 km2), agriculturally significant portion of south-central British Columbia, the Okanagan-Similkameen region, we used 21 trace elements in bone tissue to discriminate the spatial distribution of juvenile starlings and to reveal the geographic origin of the problem birds in fall. Stepwise discriminant analysis of trace elements classified juveniles to their natal origin (minimum discrimination distance of 12 km) with 79% accuracy. In vineyards and orchards, the majority (55%) of problem birds derive from northern portions of the valley; and the remaining 45% of problem birds were a mixture of local and immigrant/unassigned birds. In contrast, problem birds in dairy farms and feedlots were largely immigrants/unassigned (89%) and 11% were local from northern region of the valley. Moreover, elemental signatures can separate starling populations in the Valley yielding a promising tool for identifying the geographic origin of these migratory birds.

Trace elements in native gold by solution ICP-MS and their use in mineral exploration: A British Columbia example

2008 ◽  
Vol 23 (5) ◽  
pp. 1076-1085 ◽  
Author(s):  
Marty McInnes ◽  
John D. Greenough ◽  
Brian J. Fryer ◽  
Ron Wells
Keyword(s):  
British Columbia ◽  
Trace Elements ◽  
Native Gold ◽  
Mineral Exploration ◽  
Icp Ms

Geochemistry of two Cretaceous coal-bearing sequences: James Bay lowlands, northern Ontario, and Peace River basin, northeast British Columbia

1987 ◽  
Vol 24 (5) ◽  
pp. 1038-1052 ◽  
Author(s):  
E. Van der Flier-Keller ◽  
W. S. Fyfe
Keyword(s):  
British Columbia ◽  
Trace Elements ◽  
River Basin ◽  
Pearson Correlation ◽  
Northern Ontario ◽  
Local Conditions ◽  
Modes Of Occurrence ◽  
Peace River ◽  
Element Contents ◽  
Moose River

Cretaceous coal-bearing sequences from the Moose River basin in northern Ontario and the Peace River basin in northeast British Columbia were analysed for trace- and major-element contents. Modes of occurrence of the trace elements are proposed on the basis of Pearson correlation coefficients and scanning electron microscopy coupled with energy-dispersive X-ray analysis.The Moose River basin lignite was deposited in an alluvial floodplain environment, and the restricted mineralogy, dominated by quartz and kaolinite, reflects derivation from a highly weathered terrain. The bituminous coal from the Peace River basin was deposited in an alluvial to deltaic environment, with a dominant mineralogy including quartz, illite, kaolinite, mixed-layer clays, carbonates, barite, feldspar, and pyrite.Trace-element contents in both deposits are comparable to the average concentration in United States coals. Modes of occurrence of trace elements in the coals are extremely variable and depend on local conditions both during deposition and subsequently. Association with the organic matter is the most common mode of occurrence of trace elements in the Moose River basin lignites, whereas clay minerals are important trace-element sites in the Peace River basin coal.Factors including coal rank, clay mineralogy, nature of the surrounding rocks, and composition of the groundwaters appear to have important influences on the concentrations of the trace elements and their siting in the coals.

scholarly journals Trace elements in magnetite from porphyry Cu–Mo–Au deposits in British Columbia, Canada

2016 ◽  
Vol 72 ◽  
pp. 1116-1128 ◽  
Author(s):  
Dante Canil ◽  
Carter Grondahl ◽  
Terri Lacourse ◽  
Laura K. Pisiak
Keyword(s):  
British Columbia ◽  
Trace Elements ◽  
Porphyry Cu

scholarly journals Physiological consequences of the salmon louse ( Lepeophtheirus salmonis ) on juvenile pink salmon ( Oncorhynchus gorbuscha ): implications for wild salmon ecology and management, and for salmon aquaculture

2012 ◽  
Vol 367 (1596) ◽  
pp. 1770-1779 ◽  
Author(s):  
C. J. Brauner ◽  
M. Sackville ◽  
Z. Gallagher ◽  
S. Tang ◽  
L. Nendick ◽  
...  
Keyword(s):  
British Columbia ◽  
Ecosystem Health ◽  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Lepeophtheirus Salmonis ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Salmon Louse ◽  
Wild Salmon ◽  
Salmon Aquaculture ◽  
The Impact

Pink salmon, Oncorhynchus gorbuscha , are the most abundant wild salmon species and are thought of as an indicator of ecosystem health. The salmon louse, Lepeophtheirus salmonis , is endemic to pink salmon habitat but these ectoparasites have been implicated in reducing local pink salmon populations in the Broughton Archipelago, British Columbia. This allegation arose largely because juvenile pink salmon migrate past commercial open net salmon farms, which are known to incubate the salmon louse. Juvenile pink salmon are thought to be especially sensitive to this ectoparasite because they enter the sea at such a small size (approx. 0.2 g). Here, we describe how ‘no effect’ thresholds for salmon louse sublethal impacts on juvenile pink salmon were determined using physiological principles. These data were accepted by environmental managers and are being used to minimize the impact of salmon aquaculture on wild pink salmon populations.

Tissue residue concentrations of organohalogens and trace elements in adult Pacific salmon returning to the Fraser River, British Columbia, Canada

2010 ◽  
Vol 30 (2) ◽  
pp. 367-376 ◽  
Author(s):  
Barry C. Kelly ◽  
Michael G. Ikonomou ◽  
Nancy MacPherson ◽  
Tracy Sampson ◽  
David A. Patterson ◽  
...  
Keyword(s):  
British Columbia ◽  
Trace Elements ◽  
Pacific Salmon ◽  
Fraser River ◽  
Tissue Residue

Bias in hatchery-origin coho salmon survival estimates due to underestimated prerelease mortality

2021 ◽  
pp. 1-4
Author(s):  
James R. Irvine
Keyword(s):  
British Columbia ◽  
Experimental Evidence ◽  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
Data Sets ◽  
Wild Salmon ◽  
Natural Origin ◽  
Additional Work ◽  
Seaward Migration ◽  
Over Time

The widely accepted belief that hatchery-origin salmon survive less well than natural-origin or wild salmon can be, at least in part, an artifact of the way hatchery salmon survival is estimated. Hatchery salmon are often marked several months before release, while natural salmon are marked during their seaward migration. Underestimated prerelease mortalities result in biased low survival estimates. In British Columbia, although hatchery rearing practices have been modified to reduce unrecorded mortalities, experimental evidence indicates that coho salmon (Oncorhynchus kisutch) smolt survivals continue to be underestimated by ∼13%. Better reporting and incorporation of survival bias in data sets and analyses as well as additional work to evaluate bias for other regions and species over time is needed.

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