scholarly journals Delayed dispersal and prolonged brood care in a family-living beetle

2017 ◽  
Vol 30 (12) ◽  
pp. 2230-2243 ◽  
Author(s):  
J. R. Dillard ◽  
T. A. Maigret
Keyword(s):  
Brood Care ◽  
Delayed Dispersal ◽  
Family Living

scholarly journals Urban life promotes delayed dispersal and family living in a non-social bird species

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Álvaro Luna ◽  
Nicolás A. Lois ◽  
Sol Rodríguez-Martinez ◽  
Antonio Palma ◽  
Ana Sanz-Aguilar ◽  
...  
Keyword(s):  
Bird Species ◽  
The Body ◽  
First Year ◽  
Athene Cunicularia ◽  
Burrowing Owl ◽  
Delayed Dispersal ◽  
Social Species ◽  
Monogamous Species ◽  
Animal Populations ◽  
Family Living

AbstractIn some vertebrate species, family units are typically formed when sexually mature individuals delay dispersal and independent breeding to remain as subordinates in a breeding group. This behaviour has been intensively studied in gregarious species but has also been described in non-social species where ecological and evolutionary drivers are less known. Here, we explore factors that favour delayed dispersal and family living and potential benefits associated with this strategy in a non-social, monogamous species (the burrowing owl, Athene cunicularia) occupying urban and rural habitats. Our results show that family units arise when first-year individuals, mainly males, delay their dispersal to stay in their natal nests with their parents. This delayed dispersal, while still uncommon, was more prevalent in urban (7%) than in rural (3%) habitats, and in areas with high conspecific density and productivity. Birds delaying dispersal contributed to the genetic pool of the offspring in 25% of the families analysed, but did not increase the productivity of the nests where they remained. However, their presence was related to an improvement in the body condition of chicks, which was ultimately linked to a slightly positive effect in offspring future survival probabilities. Finally, delayed dispersers were recruited as breeders in high-quality urban territories and closer to their natal nests than individuals dispersing during their first year of life. Thus, our results suggest that delaying dispersal may be mainly related to opportunities to inheriting a good quality territory, especially for males. Our study contributes to understanding the role played by habitat quality in promoting delayed dispersal and family living, not only in social but also non-social species, highlighting its impact in the ecology and evolution of animal populations.

Jazz, dementia, and moments of meeting

2020 ◽  
Vol 10 (1) ◽  
pp. 87-92
Author(s):  
Kate White
Keyword(s):  
Personal Account ◽  
Dementia Diagnosis ◽  
Emotional Connection ◽  
The Gift ◽  
Creative Force ◽  
Family Living

Playful jazz improvisations and singing continue in creating the gift of emotional connection in a family living with Alzheimer’s. Sharing their poignant reflections provides a personal account of the centrality of music in reaching each other at a feeling level throughout the course of their lives. The recognition of music as a powerful and creative force for all of us, particularly when there is a dementia diagnosis, is explored.

scholarly journals Stress and the costs of extra-territorial movement in a social carnivore

2009 ◽  
Vol 5 (4) ◽  
pp. 439-441 ◽  
Author(s):  
Andrew J Young ◽  
Steven L Monfort
Keyword(s):  
Chronic Stress ◽  
Physiological Stress ◽  
Negative Effects ◽  
Delayed Dispersal ◽  
Non Invasive ◽  
Suricata Suricatta ◽  
Related Distribution ◽  
Selection For ◽  
Animal Societies ◽  
Pituitary Adrenal Axis

Costs associated with extra-territorial movement are believed to have favoured the evolution of delayed dispersal and sociality across a range of social vertebrates, but remain surprisingly poorly understood. Here we reveal a novel mechanism that may contribute substantially to the costs of extra-territorial movement: physiological stress. We show that subordinate male meerkats, Suricata suricatta , exhibit markedly elevated faecal glucocorticoid metabolite levels (a non-invasive measure of hypothalamic–pituitary–adrenal axis activity) while conducting extra-territorial prospecting forays. While brief increases in glucocorticoid levels are unlikely to be costly, chronic elevations, arising from prolonged and/or frequent forays, are expected to compromise fitness through their diverse negative effects on health. Our findings strongly suggest that prolonged extra-territorial movements do result in chronic stress, as the high glucocorticoid levels of prospectors do not diminish on longer forays and are no lower among males with greater prospecting experience. A generalized ‘stress’ of extra-territorial movement may therefore have strengthened selection for delayed dispersal and sociality in this and other species, and favoured the conduct of brief forays over extended periods of floating. Our findings have implications too for understanding the rank-related distribution of physiological stress in animal societies, as extra-territorial movements are often conducted solely by subordinates.

scholarly journals Delayed dispersal in western bluebirds: teasing apart the importance of resources and parents

2014 ◽  
Vol 25 (4) ◽  
pp. 843-851 ◽  
Author(s):  
J. L. Dickinson ◽  
E. D. Ferree ◽  
C. A. Stern ◽  
R. Swift ◽  
B. Zuckerberg
Keyword(s):  
Delayed Dispersal ◽  
Western Bluebirds

Brood-care experience, nursing performance, and neural development in the ant Pheidole dentata

2013 ◽  
Vol 67 (5) ◽  
pp. 775-784 ◽  
Author(s):  
Mario L. Muscedere ◽  
Anisa Djermoun ◽  
James F. A. Traniello
Keyword(s):  
Neural Development ◽  
Brood Care ◽  
Care Experience ◽  
Pheidole Dentata

Inner Equipment for Family Living

1973 ◽  
Vol 50 (2) ◽  
pp. 90-95
Author(s):  
Rebecca Bradbeer Alexander
Keyword(s):  
Family Living
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