The Avalon Magnetic Lineament—A Possible Continuation of the Triassic Dike System of New Brunswick and Nova Scotia

1975 ◽  
Vol 12 (2) ◽  
pp. 332-335 ◽  
Author(s):  
V. S. Papezik ◽  
J. P. Hodych ◽  
A. K. Goodacre
Keyword(s):  
Nova Scotia ◽  
Atlantic Ocean ◽  
New Brunswick ◽  
Grenville Province ◽  
Early Mesozoic ◽  
Avalon Peninsula

A magnetic lineament that cuts across the Avalon Peninsula lies on strike with the Shelburne Dike of Nova Scotia and may represent a northeasterly extension of a system of early Mesozoic dikes and basalts associated with the opening of the Atlantic Ocean. An alternative, but less likely, possibility is that the Avalon Lineament is related to Cambrian dike systems cutting rocks of the Grenville Province.

scholarly journals Distributional Status of an Introduced Land Snail Discus rotundatus (Rotund Disc, Mollusca: Discidae) in Canada

2016 ◽  
Vol 130 (3) ◽  
pp. 236
Author(s):  
Robert G Forsyth ◽  
John E Maunder ◽  
Donald F McAlpine ◽  
Ronald G Noseworthy
Keyword(s):  
British Columbia ◽  
Nova Scotia ◽  
North America ◽  
New Brunswick ◽  
First Record ◽  
Land Snail ◽  
Avalon Peninsula

First collected in North America in 1937 on the Avalon Peninsula of the Island of Newfoundland, the introduced, primarily European land snail, Discus rotundatus, has now been recorded from the Island of Newfoundland, Nova Scotia, New Brunswick, Quebec, Ontario, and British Columbia. We review all known records from Canada, demonstrate that D. rotundatus is more widespread than was previously recognized on the Island of Newfoundland, and report the first record from New Brunswick.

scholarly journals Winter Predation by River Otter, Lontra canadensis, on Tautog, Tautoga onitis, at Western Arm Jeddore Harbour, Halifax County, Nova Scotia, Canada, with a Review of Evidence for Resident Relict Populations of the Tautog in Nova Scotia and New Brunswick

2008 ◽  
Vol 122 (3) ◽  
pp. 247 ◽  
Author(s):  
John Gilhen ◽  
Kim Aaboe
Keyword(s):  
Nova Scotia ◽  
Atlantic Ocean ◽  
New Brunswick ◽  
Marine Fish ◽  
Lontra Canadensis ◽  
River Otter ◽  
Western Atlantic ◽  
Western Atlantic Ocean ◽  
Relict Populations

We report winter predation by River Otter, Lontra canadensis, on Tautog, Tautoga onitis, a southern marine fish, at Western Arm Jeddore Harbour, Halifax County, Nova Scotia (44°46'N, 63°03'W), on 17 February 2008. We also discuss the distribution of Tautog in the western Atlantic Ocean, review Canadian records, and provide evidence that resident relict populations of this fish exist in Nova Scotia and New Brunswick.

The Shelburne dike, an early Mesozoic diabase dike in Nova Scotia: mineralogy, chemistry, and regional significance

1981 ◽  
Vol 18 (8) ◽  
pp. 1346-1355 ◽  
Author(s):  
V. S. Papezik ◽  
Sandra M. Barr
Keyword(s):  
New Jersey ◽  
Nova Scotia ◽  
Advanced Stage ◽  
Calcic Plagioclase ◽  
Southwestern Part ◽  
Dike Swarm ◽  
Early Mesozoic ◽  
Avalon Peninsula

A diabase dike about 140 km long (the Shelburne dike) cuts in a northeasterly direction across the southwestern part of Nova Scotia. The dike, recently dated at 201 Ma, forms part of a major Appalachian system of diabase dikes and basaltic flows of early Mesozoic age, emplaced during the first stages of opening of the present Atlantic Ocean.The Shelburne dike is tholeiitic and quartz normative. Its chemistry resembles that of the Palisade sill of New Jersey, but differs substantially from the more primitive magnesian composition of a similar dike on the Avalon Peninsula of Newfoundland. A more advanced stage of differentiation is reflected also in the composition of its main minerals (augite, pigeonite, zoned orthopyroxene, calcic plagioclase). Such chemical variations among the roughly contemporaneous diabase dikes of the northern Appalachians complicate the existing petrogenetic and tectonic models of the development of the Appalachian dike swarm.

Organochlorine Residues in Brook Trout and Yellow Perch From New Brunswick and Nova Scotia (Canada) Lakes

1987 ◽  
Vol 22 (3) ◽  
pp. 352-364
Author(s):  
R. Peterson ◽  
S. Ray
Keyword(s):  
Nova Scotia ◽  
New Brunswick ◽  
Brook Trout ◽  
Yellow Perch ◽  
Intensive Agriculture ◽  
Fish Tissues ◽  
North Central ◽  
Ddt Metabolites ◽  
Headwater Lakes

Abstract Brook trout and yellow perch collected while surveying New Brunswick and Nova Scotia headwater lakes were analyzed for DDT metabolites, chlordane, hexacyclohexane isomers, hexachlorobenzene, toxaphene and PCB’s. Concentrations of DDT metabolites were much higher from fish taken from lakes in north-central N.B. (200-700 ng/g wet wt) than from fish taken elsewhere (<10 ng/g). Seventy to 90% of the DDT metabolites was DDE. Chlordane (3-13 ng/g) was analyzed in seven trout, six of them from central N.B. areas with intensive agriculture. Isomers of hexachlorocyclohexane were in highest concentration from north-central N.B. (10-20 ng/g), eastern N.S. (5-15 ng/g) and southern N.B. (5-20 ng/g). In most cases, alpha-hexachlorocyclohexane (lindane) was the isomer in highest concentration. Concentrations of hexachlorobenzene in fish tissues was highly variable with no obvious geographic bias. PCB’s were detected in very few fish, and no toxaphene was detected.

Pollen evidence for the postglacial origins of Nova Scotia's forests

1987 ◽  
Vol 65 (6) ◽  
pp. 1163-1179 ◽  
Author(s):  
David G. Green
Keyword(s):  
Nova Scotia ◽  
New Brunswick ◽  
New England ◽  
Ice Sheets ◽  
Arrival Times ◽  
Local Environments ◽  
Pollen Diagrams ◽  
Propagule Dispersal ◽  
Coastal Shelf ◽  
Maritime Canada

Pollen diagrams from sites in southwest Nova Scotia and close to the New Brunswick – Nova Scotia border show that after retreat of the Wisconsin ice sheets, most tree taxa arrived in the extreme southwest of Nova Scotia earlier than anywhere else in the province. For most tree taxa, arrival times at sites in maritime Canada and in northeastern New England are consistent with very early dispersal of individuals along the coastal strip via the exposed coastal shelf and with their entering Nova Scotia from the southwest. These scattered pioneer populations acted as centres for major population expansions, which followed much later in some cases. Local environments, fire, and interspecies competition appear to have been more important than propagule dispersal rates as factors limiting the spread of most taxa.

PREDATION BY INSECTS AND SPIDERS INHABITING COLONIAL WEBS OF HYPHANTRIA CUNEA

1972 ◽  
Vol 104 (8) ◽  
pp. 1197-1207 ◽  
Author(s):  
R. F. Morris
Keyword(s):  
Population Dynamics ◽  
Nova Scotia ◽  
North America ◽  
Population Density ◽  
New Brunswick ◽  
Numerical Response ◽  
Initial Number ◽  
Hyphantria Cunea ◽  
The North ◽  
The Mean

AbstractThe number of predators inhabiting nests of Hyphantria cunea Drury was recorded annually for 13 years in four areas in New Brunswick and two areas on the coast of Nova Scotia. The most common groups were the pentatomids and spiders, which sometimes reproduced within the nests, but the mean number per nest was low in relation to the number of H. cunea larvae in the colonies. The rate of predation on fifth-instar larvae was low. Small or timid predators appeared to prey largely on moribund larvae or small saprophagans during the principal defoliating instars of H. cunea.No relationship could be detected between the number of larvae reaching the fifth instar and the number of predators in the colony; nor could any functional or numerical response of the predators to either the initial number of larvae per colony or the population density of colonies be found. It is concluded that the influence of the nest-inhabiting predators is small and relatively stable, and may be treated as a constant in the development of models to explain the population dynamics of H. cunea.H. cunea is a pest in parts of Europe and Asia, where it has been accidentally introduced from North America. The introduction to other continents of the North American predator, Podisus maculiventiis (Say), is discussed briefly.

Limnetic Zooplankton Assemblages in Atlantic Canada with Special Reference to Acidification

1986 ◽  
Vol 43 (2) ◽  
pp. 444-456 ◽  
Author(s):  
J. C. H. Carter ◽  
W. D. Taylor ◽  
R. Chengalath ◽  
D. A. Scruton
Keyword(s):  
Nova Scotia ◽  
New Brunswick ◽  
Fish Predation ◽  
Low Ph ◽  
Buffering Capacity ◽  
The Other ◽  
Bay Of Fundy ◽  
Factor Scores ◽  
Multiple Discriminant Analysis ◽  
Biological Factors

Crustacean and rotifer plankton assemblages of 93 lakes in Labrador, 107 in Newfoundland, and 142 in New Brunswick – Nova Scotia were investigated for evidence of correlations with lake morphometric, chemical, or biological factors. Labrador assemblages were almost completely lacking in identifiable structure. Newfoundland species clustered into two groups of different body size, suggesting the influence of fish predation. Only one species in Labrador and Newfoundland was significantly correlated with a derived factor related to lake water buffering capacity. New Brunswick – Nova Scotia species clustered into two groups, one featuring significant positive and the other significant negative correlations with the buffering factor. From this we conclude that acidification is having an impact on the limnetic zooplankton of these two provinces. Multiple discriminant analysis was used to demonstrate that New Brunswick – Nova Scotia lakes differing in their buffering capacity were also distinct in zooplankton composition. Lakes with low factor scores (low pH, alkalinity, and calcium) were mainly located in the Bay of Fundy region; this area has above average fog and precipitation, and lies within the summer air flow carrying pollutants from the south.

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