Removal trapping studies of dispersal in Peromyscus leucopus

1985 ◽  
Vol 63 (1) ◽  
pp. 71-75 ◽  
Author(s):  
David T. Krohne ◽  
Mark S. Miner
Keyword(s):  
Significant Relationship ◽  
Deciduous Forest ◽  
Peromyscus Leucopus ◽  
Eastern Deciduous Forest ◽  
Old Growth ◽  
Male And Female ◽  
Resident Populations

Removal trapping was used to study the patterns of dispersal in a population of Peromyscus leucopus inhabiting old-growth eastern deciduous forest. Dispersers colonizing an artificial dispersal sink were biased toward males compared with nearby resident populations. Both male and female dispersers were biased toward younger, nonreproductive classes. There was no relationship between the number of dispersers or the rate of dispersal and density. In comparison with previous studies of dispersal in these same populations, removal trapping appeared to confirm the lack of any significant relationship between dispersal and density. However, it is apparent that removal trapping studies induce mice to disperse that otherwise might not have moved.

THE DISTRIBUTION OF DERMACENTOR TICKS IN CANADA IN RELATION TO BIOCLIMATIC ZONES

1967 ◽  
Vol 45 (4) ◽  
pp. 517-537 ◽  
Author(s):  
P. R. Wilkinson
Keyword(s):  
British Columbia ◽  
Deciduous Forest ◽  
Strong Association ◽  
Eastern Deciduous Forest ◽  
Egg Development ◽  
The North ◽  
Winter Activity ◽  
Bioclimatic Zone ◽  
Soil Temperatures ◽  
Time Of Year

Dermacentor andersoni has been collected north of Jasper, Alberta, close to 54° N. and near 53° N. in British Columbia. Spread to the north and northwest is probably limited by low summer soil temperatures, which would act principally by slowing egg development, thus disrupting the seasonal cycle of the tick. To the southwest, mild winters may fail to release diapause at the correct time of year. Aspect and slope are important factors. Altitude spread of records is from 1000–7000 ft. The most generally applicable description of its distribution is the ecotone between western grassland and moister regions, including clearings and rocky outcrops m the montane and Columbia forests, and shrubby areas of the prairies. In British Columbia, a series of randomly selected transects indicated a strong association between the tick's presence and several species of shrubs growing without tree shade.Each bioclimatic zone tends to have a characteristic group of rodents as main hosts of the immature stages. The prairie and montane regions differ in the indigenous hosts available to the adult tick.East of 105° D. andersoni is replaced by D. variabilis, which is adapted to the more humid summers of the eastern deciduous forest zones, and differs considerably from D. andersoni in its phenology. There are no reliable records of indigenous D. variabilis north of 52° latitude.D. albipictus occurs from the east to the west coast. Because of the winter activity of its larvae, allowing the whole summer for egg development, it is able to penetrate much farther north than the other two species. There are two records close to 60° latitude.

scholarly journals The Academic Intrinsic Motivation and its Relationship with the Emotional Intelligence Level with a Sample of the Academic Overachievers and Underachievers of Najran University

2016 ◽  
Vol 6 (2) ◽  
pp. 119 ◽  
Author(s):  
Ibrahim Ragab Abbas Ibrahim ◽  
Weal Ameen AL-Ali
Keyword(s):  
Emotional Intelligence ◽  
Intrinsic Motivation ◽  
Significant Relationship ◽  
Female Students ◽  
Male And Female ◽  
First Semester ◽  
Academic Intrinsic Motivation ◽  
Study Population ◽  
The University ◽  
Academic Year

<p>The research tackled the academic intrinsic motivation and its relationship with the emotional intelligence with a sample of the academic overachievers and underachievers of Najran University. The study population consisted of the students of Najran University who are enrolled in the University academic year 2015/2016, during the first semester in the various colleges. The study sample consisted of (423) male and female students; and the study instruments included the emotional IQ which consisted of (54) items, and the academic intrinsic motivation questionnaire, which consisted of (36) items, to identify the overall emotional intelligence degree and the motivation with the students. The results showed that the academic intrinsic motivation and emotional intelligence degrees were high with the university students. Furthermore, the results showed a direct correlational, statistically significant relationship between the academic intrinsic motivation and the emotional intelligence; and there are statistically significant differences between the motivation and emotional intelligence among the academically outstanding and non-outstanding students.</p>

The biology of Canadian weeds. 130. Solidago nemoralis Ait.

2004 ◽  
Vol 84 (4) ◽  
pp. 1221-1233 ◽  
Author(s):  
Jerry G. Chmielewski ◽  
John C. Semple
Keyword(s):  
United States ◽  
North America ◽  
Deciduous Forest ◽  
Sandy Soils ◽  
The United States ◽  
Eastern Deciduous Forest ◽  
Rock Outcrops ◽  
Native North American ◽  
Forest Region ◽  
Riparian Habitats

Solidago nemoralis, the gray goldenrod, is a polycarpic hemicryptophyte that reproduces vegetatively from branched caudices. This native North American species is morphologically variable throughout its range, and includes an eastern (ssp. nemoralis) and western (ssp. decemflora) race. The eastern subspecies occurs throughout the eastern deciduous forest region of North America and is commonly diploid, though tetraploids do occur throughout. The western race typically occurs on the prairies and is strictly tetraploid. The species occupies riparian habitats, rock outcrops and open fields and roadsides and grows best in well-drained sandy soils in full sunlight. Although the species is weedy in both Canada and the United States it is not noxious. Key words: Solidago nemoralis, gray goldenrod, verge d'or des bois, Asteraceae, Compositae

scholarly journals Scientific Temper and Academic Achievement among Tribal and Non-Tribal Students

2017 ◽  
Vol 4 (3) ◽  
Author(s):  
Azad Ahmad Andrabi ◽  
Nayyar Jabeen
Keyword(s):  
Academic Achievement ◽  
Significant Relationship ◽  
Random Sampling ◽  
Sampling Technique ◽  
Female Students ◽  
Stratified Random Sampling ◽  
Jammu And Kashmir ◽  
Male And Female ◽  
Tribal Group ◽  
Adolescent Students

The present investigation is a comparative study in which a total of 564 tribal and non-tribal adolescent students of Jammu And Kashmir State were selected by stratified random sampling technique. The tribal and non-tribal students were compared for the relationships between academic achievement and scientific temper. Data collected by The Scientific temper scale (2008) by Showkat and Nadeem showed a significant relationship between academic achievement and scientific temper in non-tribal adolescents only. Further gender wise comparisons revealed that male and female students of non-tribal group had significant relationship between the two variables as compared to tribal group.

Demographic characteristics of Peromyscus leucopus inhabiting a natural dispersal sink

1989 ◽  
Vol 67 (9) ◽  
pp. 2321-2325 ◽  
Author(s):  
David T. Krohne
Keyword(s):  
Population Biology ◽  
Peromyscus Leucopus ◽  
Demographic Characteristics ◽  
Winter Survival ◽  
Old Growth ◽  
Naturally Occurring ◽  
West Central ◽  
Reproductive Rates ◽  
Autumn And Winter ◽  
Natural Dispersal

The population biology of white-footed mice (Peromyscus leucopus) inhabiting a 1.4-ha naturally occurring dispersal sink was studied for 5 years in west-central Indiana and compared with that in surrounding old-growth habitat. Densities in the dispersal sink were consistently lower than in prime habitat. Autumn and winter survival were practically nil. The sink was recolonized by adults in the spring following extreme low winter densities or extinction. Summer reproductive rates and the pattern of territoriality were similar to those in prime habitat. Mice colonized elsewhere when empty prime habitat was made experimentally available. The data suggest that few dispersing mice can be accommodated by the dispersal sink.

Evaluating relationships among tree growth rate, shade tolerance, and browse tolerance following disturbance in an eastern deciduous forest

2009 ◽  
Vol 39 (12) ◽  
pp. 2460-2469 ◽  
Author(s):  
Lisa M. Krueger ◽  
Chris J. Peterson ◽  
Alejandro Royo ◽  
Walter P. Carson
Keyword(s):  
Forest Dynamics ◽  
Shade Tolerance ◽  
Deciduous Forest ◽  
Species Turnover ◽  
Light Availability ◽  
Woody Species ◽  
Plant Performance ◽  
Eastern Deciduous Forest ◽  
Interspecific Differences ◽  
The Impact

Interspecific differences in shade tolerance among woody species are considered a primary driving force underlying forest succession. However, variation in shade tolerance may be only one of many interspecific differences that cause species turnover. For example, tree species may differ in their sensitivity to herbivory. Nonetheless, existing conceptual models of forest dynamics rarely explicitly consider the impact of herbivores. We examined whether browsing by white-tailed deer ( Odocoileus virginianus Zimmermann) alters the relationship between light availability and plant performance. We monitored growth and survival for seedlings of six woody species over 2 years within six windthrow gaps and the nearby intact forest in the presence and absence of deer. Browsing decreased seedling growth for all species except beech ( Fagus grandifolia Ehrh.). More importantly, browsing altered growth rankings among species. Increased light availability enhanced growth for three species when excluded from deer, but browsing obscured these relationships. Browsing also reduced survival for three species; however, survival rankings did not significantly differ between herbivory treatments. Our results indicated that browsing and light availability operated simultaneously to influence plant growth within these forests. Thus, existing models of forest dynamics may make inaccurate predictions of the timing and composition of species reaching the canopy, unless they can account for how plant performance varies as a result of a variety of environmental factors, including herbivory.

Estimation of stature from little finger length and formulation of regression equation in both sexes

2021 ◽  
Vol 8 (2) ◽  
pp. 140-144
Author(s):  
Ranjna Janagal ◽  
Shradha Iddalgave ◽  
Nagesh Kuppast ◽  
Sundip Charmode ◽  
Pratik V Tawade ◽  
...  
Keyword(s):  
Forensic Medicine ◽  
Significant Relationship ◽  
Strong Correlation ◽  
Intervertebral Discs ◽  
Regression Equation ◽  
Dead Body ◽  
Male And Female ◽  
Medical College ◽  
Finger Length ◽  
Little Finger

Estimation of stature or height of a person is subject to variations during life due to muscular relaxation and elasticity of intervertebral discs, but could be still valuable in identification. Stature of an individual may reduce as age advances after 30 years due to natural senile degeneration. The stature will be reduced by 0.6mm per year after thirty. The identification of the dead body and corpus delicti is important before sentence is passed in murder trials. The present study was carried in the department of Forensic Medicine and Toxicology, ESIC Medical College, Kalburagi. Total 140 students (70 males and 70 females) from ESIC Medical College, Kalburagi were randomly selected for the study. The present study “Estimation of stature from little finger length and formulation of regression equation in both sexes” is taken with the aim, to determine correlation between stature and little finger length of a person and develop regression formulae to estimate stature from little finger length for both male and female sexes separately. The results of this study showed that there is a statistically significant relationship between the little finger length and the stature. In this study females shows strong correlation between little finger length and stature compared to males. The regression equation developed in the study can be used to estimate stature of a person efficiently with SE of 6.6289 and 6.5957 in males for right little finger and left little finger respectively and SE of 6.3239 and 5.3946 in females for right little finger length and left little finger length respectively.

Sign in / Sign up

Export Citation Format

Share Document