scholarly journals MEASURE INDUCED BY THE PARTITION OF THE GENERAL REGION

2013 ◽  
Vol 21 (3) ◽  
pp. 237-246
Author(s):  
Joo Sup Chang ◽  
Byoung Soo Kim
Keyword(s):  
General Region

Suppression of Autumnal Migratory Unrest in Dark-Eyed Juncos Held During Summer on, Near, or Far From their Previous Wintering Sites

The Auk ◽  
1987 ◽  
Vol 104 (2) ◽  
pp. 303-310 ◽  
Author(s):  
Ellen D. Ketterson ◽  
Val Nolan
Keyword(s):  
Home Range ◽  
Small Group ◽  
Site Fidelity ◽  
General Information ◽  
Previous Experience ◽  
Migratory Restlessness ◽  
Home Ranges ◽  
Junco Hyemalis ◽  
Far North ◽  
General Region

Abstract In previous experiments, Dark-eyed Juncos (Junco hyemalis) were captured on a winter home range to which they had shown year-to-year site fidelity and held there until just before the autumn. They failed to show normal autumn migratory restlessness and fattening, which suggested that previous experience at the migratory destination suppressed readiness to migrate. We asked what the suppressing cues might be. Possibilities included very local features peculiar to the individual's winter home range (e.g. its trees) and cues common to the general region (e.g. geophysical or celestial information); features of the latter sort might give information about latitude. To test these possibilities we monitored autumn restlessness and fattening of new groups of juncos that were held before migration where some could perceive landmarks of their familiar winter home range and others only more general information about their location. In autumn those held at, near, and far south of their winter home ranges again failed to become restless or fat. A small group held far north of their winter home ranges became somewhat restless, significantly more so than the others. These may have perceived that they had not reached their usual winter latitude, but alternative explanations are possible.

scholarly journals Aboriginal Ceramic Sherds from 41MA30 in the Navasota River Basin in Madison County, Texas

2013 ◽  
Author(s):  
Timothy K. Perttula
Keyword(s):  
River Basin ◽  
General Region ◽  
Madison County ◽  
Ceramic Assemblages

Aboriginal ceramic sherds from three sites (41MA27, 41MA29, and 41MA30) in the Navasota River basin in the Prairie Savannah of Texas provided the opportunity to investigate their spatial and temporal nature, and to establish with a reasonable certainty their origins, ethnic affiliations, as well as relationships to other ceramic assemblages in the general region. A second collection of nine ceramic sherds is available from 41MA30, and this article describes the analysis of these additional sherds, and then summarizes the character of the larger assemblage (n=30 sherds) as a whole.

A NEW RACE OF PAPILIO BELONGING TO THE MACHAON COMPLEX

1939 ◽  
Vol 71 (10) ◽  
pp. 216-217 ◽  
Author(s):  
J. McDunnough
Keyword(s):  
Red Deer ◽  
River Valley ◽  
General Region ◽  
New Race ◽  
Collection Time

For years several specimens of a Papilio form from Alberta, allied to oregonia Edw., have stood apart in the Canadian National Collection. Time and again I have puzzled over them but could never make them fit exactly under any of the existing names. Three of the series (males) came to us with the Wolley-Dod collection and were captured in 1905 in the bad lands of the Red Deer River Valley, somewhere near Drumheller; a fourth specimen (a female) was taken in the same general region in 1917 by C. H. Young.

Nesting parameters in a high density, declining population of blue grouse

1988 ◽  
Vol 66 (8) ◽  
pp. 1736-1741 ◽  
Author(s):  
Fred. C. Zwickel ◽  
Richard A. Lewis ◽  
Donald T. McKinnon
Keyword(s):  
British Columbia ◽  
Clutch Size ◽  
Nesting Success ◽  
Moderate Density ◽  
Egg Hatchability ◽  
General Region ◽  
Adult Females ◽  
Dendragapus Obscurus ◽  
Very High ◽  
Egg Fertility

Of four nesting parameters (clutch size, egg fertility, egg hatchability, and nesting success) in a population of blue grouse, Dendragapus obscurus fuliginosus, at Hardwicke Island, British Columbia, only clutch size differed between yearling and adult females. There was no difference among years for any of the parameters considered. This population declined from very high to moderate density during the studies reported here, and clutch size, egg fertility, and hatchability were significantly lower than reported for a more stable population (Comox Burn) in the same general region. Nesting success at Hardwicke Island, however, was higher than at Comox Burn. Collectively, the parameters examined do not, by themselves, explain the observed decline. Nevertheless, they suggest that the population at Hardwicke Island differed from that at Comox Burn in some fundamental aspects of reproduction that may be symptomatic of other factors possibly involved in its decline, e.g., the survival of chicks.

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