Sexual differences in biomass and nutrient allocation of first-year Silene dioica plants

Oecologia ◽  
1999 ◽  
Vol 118 (4) ◽  
pp. 453-460 ◽  
Author(s):  
Åsa M. Hemborg ◽  
P. Staffan Karlsson
Keyword(s):  
Sexual Differences ◽  
First Year ◽  
Nutrient Allocation ◽  
Silene Dioica

Seasonal Dynamics in Reproduction of First-Year Females and Males in Silene dioica

1998 ◽  
Vol 159 (6) ◽  
pp. 958
Author(s):  
Asa M. Hemborg
Keyword(s):  
Seasonal Dynamics ◽  
First Year ◽  
Silene Dioica

Sexual Differences in Biomass and Nutrient Allocation in the Dioecious Rubus Chamaemorus

Ecology ◽  
1988 ◽  
Vol 69 (4) ◽  
pp. 962-973 ◽  
Author(s):  
Jon Agren
Keyword(s):  
Sexual Differences ◽  
Nutrient Allocation ◽  
Rubus Chamaemorus

Seasonal Dynamics in Reproduction of First‐Year Females and Males in Silene dioica

1998 ◽  
Vol 159 (6) ◽  
pp. 958-967 ◽  
Author(s):  
Åsa M. Hemborg
Keyword(s):  
Seasonal Dynamics ◽  
First Year ◽  
Silene Dioica

Dispersal and range expansion by the cardinal: an analysis of banding records

1971 ◽  
Vol 49 (2) ◽  
pp. 185-198 ◽  
Author(s):  
Douglas D. Dow ◽  
D. M. Scott
Keyword(s):  
Range Expansion ◽  
Large Scale ◽  
Sexual Differences ◽  
First Year ◽  
Subsequent Period

Patterns of dispersal by the cardinal, Richmondena cardinalis, a species that has been undergoing range expansion for over 70 years, were analyzed from banding data. About 13% of 1523 foreign retraps and recoveries were found outside the 10-min block of latitude and longitude in which they had been banded. Significantly more immatures than adults dispersed; sexual differences were not pronounced. Dispersal was more common among young birds, but was not restricted to first-year birds. More distant movements probably occur in the first year and mortality may be related to distance travelled. As cardinals become older, females may become more sedentary than males. Cardinals travelled greater distances between 1933 and 1942 than in any subsequent period, and the greatest increase in numbers dispersing occurred between 1953 and 1962. Range expansion has possibly resulted from shifts in general centers of dispersal, as banding recoveries do not suggest large-scale unidirectional movements. The relation of these results to published accounts of range expansion by the cardinal is discussed.

scholarly journals Demographic consequences of sexual differences in age at first breeding in Cooper’s Hawks (Accipiter cooperii)

The Auk ◽  
2019 ◽  
Vol 136 (3) ◽  
Author(s):  
Brian A Millsap ◽  
Kristin Madden ◽  
Robert K Murphy ◽  
Mark Brennan ◽  
Joel E Pagel ◽  
...  
Keyword(s):  
Life History Theory ◽  
Sexual Differences ◽  
First Year ◽  
Accipiter Cooperii ◽  
Demographic Models ◽  
Individual Fitness ◽  
Age At First Breeding ◽  
Study Population ◽  
Second Year ◽  
Cooper's Hawks

Abstract Life-history theory predicts individuals should breed as soon as they are able to reproduce, but many long-lived birds delay breeding. In the Accipitriformes, delayed breeding is the norm, and age when breeding begins is influenced by competing selective pressures. In most Accipitriformes, the reproductive roles of males and females differ; males do most of the foraging and females tend eggs and young. Thus, sexual differences in age at first breeding might be expected, but these differences, possible causes, and implications for individual fitness have received little study. We investigated sexual differences in age at first breeding in a marked population of Cooper’s Hawks (Accipiter cooperii) from 2011 through 2018 in central New Mexico, USA. We hypothesized that males required more experience to pair and breed successfully than females, and we predicted: (1) a lower mean age at first breeding for females than males, and (2) that expected individual fitness of early-breeding males would be lower than for early-breeding females. We found that 79% more females than males bred in their first year (hatching year, HY), and expected individual fitness of HY-breeding females was 21% greater than for HY-breeding males. HY males that attempted to breed settled on nesting territories with exceptionally high prey abundance, nevertheless they experienced 37% lower second-year survival than males that delayed breeding. Females competed for mates based on male age. HY females that paired with relatively older males had 33% higher second-year survival and 16% higher expected individual fitness than HY females that initially paired with relatively younger males. The observed annual rate of growth (λ) of our study population was 1.08, closer to λ predicted by male (1.02) than female (1.21) demographic models. Delayed breeding by males thus had important ramifications for λ, highlighting the need to consider sexual differences in age at first breeding in demographic analyses.

Reflections on the first year of dental teaching

1971 ◽  
Vol 35 (1) ◽  
pp. 23-24
Author(s):  
JW Lowe
Keyword(s):  
First Year

Changes in role perceptions by first-year dental students

1977 ◽  
Vol 41 (8) ◽  
pp. 507-510 ◽  
Author(s):  
AC Rosen ◽  
M Marcus ◽  
N Johnson
Keyword(s):  
Dental Students ◽  
First Year ◽  
Role Perceptions

Relationship of stress and performance among first-year dental students

1986 ◽  
Vol 50 (5) ◽  
pp. 264-267 ◽  
Author(s):  
GH Westerman ◽  
TG Grandy ◽  
JV Lupo ◽  
RE Mitchell
Keyword(s):  
Dental Students ◽  
First Year ◽  
And Performance ◽  
Relationship Of

Interpersonal support and coping among first-year dental students

1980 ◽  
Vol 44 (4) ◽  
pp. 202-205 ◽  
Author(s):  
MB Goldstein
Keyword(s):  
Dental Students ◽  
First Year ◽  
Interpersonal Support ◽  
And Coping

First-year experience with a performance simulation system

1983 ◽  
Vol 47 (10) ◽  
pp. 666-670
Author(s):  
MA Boyd ◽  
D Donaldson
Keyword(s):  
Simulation System ◽  
First Year Experience ◽  
First Year ◽  
Performance Simulation ◽  
A Performance
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