Reproductive Biology of Caulophyllum thalictroides (Berberidaceae), an Early Flowering Perennial of Eastern North America

1996 ◽  
Vol 136 (2) ◽  
pp. 267 ◽  
Author(s):  
Gary L. Hannan ◽  
Hewlett A. Prucher
Keyword(s):  
North America ◽  
Reproductive Biology ◽  
Early Flowering ◽  
Eastern North America ◽  
Caulophyllum Thalictroides

scholarly journals The Reproductive Biology of the Softshell Clam,Mya arenaria, in Ireland, and the Possible Impacts of Climate Variability

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
M. E. Cross ◽  
S. Lynch ◽  
A. Whitaker ◽  
R. M. O'Riordan ◽  
S. C. Culloty
Keyword(s):  
North America ◽  
Climate Variability ◽  
Histological Examination ◽  
Reproductive Biology ◽  
Mya Arenaria ◽  
Eastern North America ◽  
Fertilisation Success ◽  
Male Ratio ◽  
The Mean ◽  
Softshell Clam

Little is known about the biology of the softshell clam in Europe, despite it being identified as a potential species to culture for food in the future. Monthly samples of the softshell clam,Mya arenaria, were collected intertidally from Co. Wexford, Ireland, over a period of sixteen months. The mean weight of sampled individuals was74±4.9 g and mean length was8.2±0.2 cm. Histological examination revealed a female-to-male ratio of 1 : 1.15. In 2010,M. arenariaat this site matured over the summer months, with both sexes either ripe or spawning by August. A single spawning event was recorded in 2010, completed by November. Two unusually cold winters, followed by a warmer-than-average spring, appear to have affectedM. arenariagametogenesis in this area, potentially affecting the time of spawning, fertilisation success, and recruitment of this species. No hermaphrodites were observed in the samples collected, nor were any pathogens observed. Timing of development and spawning is compared with the coasts of eastern North America and with other European coasts.

The Identification and Study of Indian Shell Middens in Eastern North America: 1643–1861

1986 ◽  
Vol 6 (3) ◽  
pp. 227-243 ◽  
Author(s):  
Andrew L. Christenson
Keyword(s):  
Nineteenth Century ◽  
Civil War ◽  
North America ◽  
East Coast ◽  
Eastern North America ◽  
Shell Midden ◽  
Shell Middens ◽  
Work Done

Although the interest in shell middens in North America is often traced to reports of the discoveries in Danish kjoekkenmoeddings in the mid-nineteenth century, extensive shell midden studies were already occurring on the East Coast by that time. This article reviews selected examples of this early work done by geologists and naturalists, which served as a foundation for shell midden studies by archaeologists after the Civil War.

HAVE WE SEEN THE LARGEST EARTHQUAKES IN EASTERN NORTH AMERICA?

2018 ◽  
Author(s):  
James S. Neely ◽  
◽  
Seth Stein ◽  
Miguel Merino ◽  
John Adams
Keyword(s):  
North America ◽  
Eastern North America
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