Sexually dimorphic morphology of hatchling snapping turtles (Chelydra serpentina) from contaminated and reference sites in the Great Lakes and St. Lawrence River basin, North America

2002 ◽  
Vol 21 (5) ◽  
pp. 922-929 ◽  
Author(s):  
Shane R. de Solla ◽  
Christine A. Bishop ◽  
Ronald J. Brooks
Keyword(s):  
North America ◽  
Great Lakes ◽  
River Basin ◽  
Sexually Dimorphic ◽  
Chelydra Serpentina ◽  
Reference Sites ◽  
Snapping Turtles ◽  
St Lawrence River

Early Maize in Northeastern North America: A Comment on Emerson and Colleagues

2021 ◽  
Vol 86 (2) ◽  
pp. 425-427
Author(s):  
John P. Hart ◽  
William A. Lovis ◽  
M. Anne Katzenberg
Keyword(s):  
North America ◽  
Great Lakes ◽  
Empirical Evidence ◽  
River Valley ◽  
Human Bone ◽  
Northeastern North America ◽  
Isotopic Evidence ◽  
St Lawrence River

Emerson and colleagues (2020) provide new isotopic evidence on directly dated human bone from the Greater Cahokia region. They conclude that maize was not adopted in the region prior to AD 900. Placing this result within the larger context of maize histories in northeastern North America, they suggest that evidence from the lower Great Lakes and St. Lawrence River valley for earlier maize is “enigmatic” and “perplexing.” Here, we review that evidence, accumulated over the course of several decades, and question why Emerson and colleagues felt the need to offer opinions on that evidence without providing any new contradictory empirical evidence for the region.

Freight Capacity and Utilization of the Erie and Great Lakes Canals before 1850

1976 ◽  
Vol 36 (4) ◽  
pp. 852-877 ◽  
Author(s):  
Thomas F. McIlwraith
Keyword(s):  
Nineteenth Century ◽  
North America ◽  
Great Lakes ◽  
Canal Enlargement ◽  
The Relationship ◽  
Eastern Half ◽  
St Lawrence River

This paper deals with the relationship between tonnage capacity and utilization of the Erie, Welland and St. Lawrence River canals before 1850. Estimates are presented for the capacities of the canals, as built and modified. Comparison with the actual tonnage carried eastward for selected years shows that the British canals were grossly and increasingly underutilized, while the Erie's utilization was closely correlated with its capability, particularly through its eastern half. Reasons for this situation are given and it is argued that had British funds been redirected away from canal enlargement and applied to the construction of vessels and harbor facilities, the British might have entered upon a prosperous carrying trade within North America in the second quarter of the nineteenth century.

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