scholarly journals AGE-RELATED SURVIVAL AND BEHAVIOR OF SNOWY PLOVER CHICKS

The Condor ◽  
2007 ◽  
Vol 109 (3) ◽  
pp. 638 ◽  
Author(s):  
MARK A. COLWELL ◽  
SUSAN J. HURLEY ◽  
JAMES N. HALL ◽  
STEPHEN J. DINSMORE
Keyword(s):  
Age Related ◽  
Snowy Plover ◽  
And Behavior ◽  
Related Survival

scholarly journals Age-Related Survival and Behavior of Snowy Plover Chicks

The Condor ◽  
2007 ◽  
Vol 109 (3) ◽  
pp. 638-647 ◽  
Author(s):  
Mark A. Colwell ◽  
Susan J. Hurley ◽  
James N. Hall ◽  
Stephen J. Dinsmore
Keyword(s):  
High Mortality ◽  
Chick Survival ◽  
Lower Survival ◽  
Charadrius Alexandrinus ◽  
Avian Predators ◽  
Age Related ◽  
Age Dependent ◽  
Snowy Plover ◽  
And Behavior ◽  
Related Survival

AbstractAbstract. Precocial young often experience high mortality prior to achieving flight, especially in the first days after hatching. We quantified relationships between chick age, survival, behavior, and response to natural and anthropogenic danger for the threatened Western Snowy Plover (Charadrius alexandrinus nivosus) in coastal northern California, USA. Plover chicks were most likely to die in the first three days of their 28-day prefledging period, especially on sandy ocean beaches compared to coarser substrates of river habitats. Chick survival in both habitats increased across the ∼120-day chick-rearing period. Improved survival of older chicks coincided with an age-related reduction in brooding and increased distance from the tending parent, which was not related to season. Lower survival of younger chicks was correlated with a tendency to lie motionless when approached by humans; nearly all older chicks responded to human approach by running to evade danger. Chicks of all ages were more likely to lie motionless when potential avian predators flew nearby. Age-dependent survival of Snowy Plover chicks paralleled a trend of increasing development, thermal independence from adults, and capability of evading predators.

scholarly journals Fears for the future among Finnish adolescents in 2019

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
P Lindfors ◽  
L Lahti ◽  
J Kinnunen ◽  
A Rimpelä
Keyword(s):  
Climate Change ◽  
Age Groups ◽  
Nationwide Survey ◽  
Working Life ◽  
Political Values ◽  
Global Issues ◽  
Age Related ◽  
The Future ◽  
And Behavior ◽  
Images Of The Future

Abstract Background Adolescents' images of the future emerge from knowledge built on experiences of the past and present and their age-related developmental tasks. Images of the future direct adolescents' decision-making, choices, and behavior. The images of the future can act as a mirror of our times, reflecting the political values and ethos of society. The aim of this study was to examine the fears for the future among Finnish adolescents in the era of climate change. Methods Data from a nationwide survey on the health and health behavior of 12-, 14-, 16-, and 18-year-olds (n = 3520, the response rate 37 %) in 2019 in Finland. An open-ended question on fears for the future was employed as a final question on the survey. The data was analyzed first by inductive content analysis and then by statistical methods. Altogether 7829 fears were reported. These were constructed into 12 main categories. Results Fears for the social relationships and loneliness were the most common (35 %). Fears related to death (33 %), physical health and wellbeing (25 %), life management and success (19 %) and working life (17 %) were next common. Only 9 % of the adolescents reported climate and the environment related fears. In age group comparisons, 12-14-year-olds reported more global and social fears, while 16-18-year-olds reported more personal fears, such as study, working life and relationships. The most common fears among boys and girls were similar in all age groups. Conclusions The most common fears among Finnish adolescents are related to personal life and less to global issues. Against our hypothesis, climate and environmental related fears were not among the top fears, even these topics are figured prominently in media and other research has also reported high proportions of climate change related fears among adolescents. The inconsistencies might be explained by the differences in the research methodologies: whether open-ended questions or structured questions are used. Key messages Most common fears for the future are related to personal issues like relationships, health and work. Fears for climate change were not among the most common ones when open-ended questions were used.

Age-related alterations in the rodent brain cholinergic system and behavior

1980 ◽  
Vol 1 (1) ◽  
pp. 59-63 ◽  
Author(s):  
R STRONG ◽  
P HICKS ◽  
L HSU ◽  
R BARTUS ◽  
S ENNA
Keyword(s):  
Cholinergic System ◽  
Rodent Brain ◽  
Age Related ◽  
And Behavior

Age-related survival disparity in stage IB and IIB cervical cancer patients

2019 ◽  
Vol 45 (3) ◽  
pp. 686-694
Author(s):  
Atsuko Sakakibara ◽  
Kunihiko Matsui ◽  
Toshiro Katayama ◽  
Toshihiro Higuchi ◽  
Koichi Terakawa ◽  
...  
Keyword(s):  
Cervical Cancer ◽  
Cancer Patients ◽  
Stage Ib ◽  
Age Related ◽  
Related Survival

scholarly journals Age-related shapes of the cost of reproduction in vertebrates

2007 ◽  
Vol 3 (6) ◽  
pp. 674-677 ◽  
Author(s):  
G Proaktor ◽  
E.J Milner-Gulland ◽  
T Coulson
Keyword(s):  
Life History ◽  
Exponential Decay ◽  
Theoretical Method ◽  
Cost Of Reproduction ◽  
Frequent Pattern ◽  
Costs Of Reproduction ◽  
Age Related ◽  
Cost Curves ◽  
The Cost ◽  
Related Survival

The shape of the association between age and the cost of reproduction varies across species. However, it is unclear whether there are any general patterns in the way the cost of reproduction varies with life history, taxon or ecological function. Using a simple theoretical method, we identified three characteristic patterns to describe the age-related survival cost of reproduction. The most frequent pattern is an approximately exponential decay (ED) with increasing age. Two additional u-shaped patterns were identified, where the cost of reproduction was higher for young and old individuals compared with intermediate-aged individuals. The majority of these u-shaped curves suggested higher costs of reproduction at older ages (RQ), with the rest suggesting a higher cost at young ages (LQ). While predators were most likely to exhibit ED-shaped cost curves, herbivores were equally likely to exhibit ED and RQ curves; birds were likely to exhibit ED-shaped curves and mammals were split equally between ED and RQ curves. These findings suggest that there may be predictable differences in the age-related shape of the cost of reproduction between species, but further research is required to identify the mechanisms generating such differences.

scholarly journals Quantifying age-related changes in brain and behavior: A longitudinal versus cross-sectional approach

eNeuro ◽  
2021 ◽  
pp. ENEURO.0273-21.2021
Author(s):  
Georgette Argiris ◽  
Yaakov Stern ◽  
Christian Habeck
Keyword(s):  
Cross Sectional ◽  
Age Related ◽  
Brain And Behavior ◽  
And Behavior ◽  
Age Related Changes

scholarly journals Measuring the repertoire of age-related behavioral changes in Drosophila melanogaster

2021 ◽  
Author(s):  
Katherine E. Overman ◽  
Daniel M. Choi ◽  
Kawai Leung ◽  
Joshua W. Shaevitz ◽  
Gordon J. Berman
Keyword(s):  
Drosophila Melanogaster ◽  
Energy Budget ◽  
Behavioral Changes ◽  
Sexually Dimorphic ◽  
Behavioral Repertoire ◽  
Biological Mechanisms ◽  
Age Related ◽  
Using Data ◽  
Almost All ◽  
And Behavior

Aging affects almost all aspects of an organism – its morphology, its physiology, its behavior. Isolating which biological mechanisms are regulating these changes, however, has proven difficult, potentially due to our inability to characterize the full repertoire of an animal’s behavior across the lifespan. Using data from fruit flies (D. melanogaster) we measure the full repertoire of behaviors as a function of age. We observe a sexually dimorphic pattern of changes in the behavioral repertoire during aging. Although the stereotypy of the behaviors and the complexity of the repertoire overall remains relatively unchanged, we find evidence that the observed alterations in behavior can be explained by changing the fly’s overall energy budget, suggesting potential connections between metabolism, aging, and behavior.

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