The post-fledging period, extending from fledging to independence, is a crucial life stage characterized by high mortality due to fledglings' limited mobility and inexperience. During this stage, fledglings gradua...The post-fledging period, extending from fledging to independence, is a crucial life stage characterized by high mortality due to fledglings' limited mobility and inexperience. During this stage, fledglings gradually increase their mobility, leave their parents, disperse from their natal site, and respond to the challenges of new environments. Characterizing these post-fledging movements and space use is essential for understanding juvenile survival strategies and devising targeted conservation measures. The Crested Ibis (Nipponia nippon), an endangered species and a highly protected animals at the national level in China, has seen limited research on its post-fledging movements and space use. From 2015 to 2023, we utilized biologgers, combined with field surveys, to study the movement and space use characteristics of 37 fledglings in Hanzhong City, Shaanxi Province, China, over a two-month post-fledging period. We quantified changes in activity levels (based on overall dynamic body acceleration), independence timing, onset of post-fledging dispersal, habitat selection, and daily activity rhythms after independence. Our results revealed individuals began independent living 26.23 ± 2.34 days post-fledging and onset of dispersal at 25.58 ± 2.33 days, with a range area at the natal of 2.08 ± 0.56 km^(2). The initial 30 days post-fledging are characterized as an ontogenetic phase marked by a rapid increase in body activity level. Fledglings preferred paddy fields during the independent period rather than the forests they relied on before independence. Interestingly, the daily activity rhythm, particularly foraging behavior, peaked at noon—contrasting with the expected morning and evening activity peaks—likely as an adaptation to avoid periods of peak human activity. Additionally, drowning, collisions, and predation in paddy fields are noteworthy causes of fledgling mortality. Consequently, we recommend protecting a 2-km^(2) area around the nest site for at least two-month post-fledging, implementing safety measures around power lines and cesspools. Additionally, reducing human disturbances near foraging habitats and expanding space within paddy fields would help mitigate survival pressures on fledglings.展开更多
Unlike developed countries,the process of ageing in the developing country is a major and serious concern where the health infrastructure,geriatric system and social security remain underdeveloped.This paper aims to a...Unlike developed countries,the process of ageing in the developing country is a major and serious concern where the health infrastructure,geriatric system and social security remain underdeveloped.This paper aims to assess the gaps in quality of life among the elderly by socio-economic and demographic characteristics and to know the issues and challenges in the selected developing countries where Study on Global Ageing and Adult Health(SAGE)namely China,India,Ghana,South Africa,Mexico,and Russia has been conducted.The overall score indicates that there is a little variation in the quality of life across the countries,ranging from 52.1(China)to 45.5(Ghana).However,there is considerable variation in the quality-of-life score by socio-economic characteristics.From the existing policy perspectives,different aspects of old age policies are varied across the selected countries.The rapid expan-sion of the private sector into these areas is unlikely to benefit the bulk of the elders.The countries like India,South Africa and Mexico,where the private sector plays a major role,lack health care support for the elderly.However,financial support sig-nificantly contributes to the quality of life in terms of policy intervention in those countries.Thus,the respective governments need to address urgently the areas like health care,financial and social security to achieve the healthy lives and wellbeing for all of the sustainable development goals by 2030.展开更多
基金funded by the National Natural Science Foundation of China(No.32270554,32400400).
文摘The post-fledging period, extending from fledging to independence, is a crucial life stage characterized by high mortality due to fledglings' limited mobility and inexperience. During this stage, fledglings gradually increase their mobility, leave their parents, disperse from their natal site, and respond to the challenges of new environments. Characterizing these post-fledging movements and space use is essential for understanding juvenile survival strategies and devising targeted conservation measures. The Crested Ibis (Nipponia nippon), an endangered species and a highly protected animals at the national level in China, has seen limited research on its post-fledging movements and space use. From 2015 to 2023, we utilized biologgers, combined with field surveys, to study the movement and space use characteristics of 37 fledglings in Hanzhong City, Shaanxi Province, China, over a two-month post-fledging period. We quantified changes in activity levels (based on overall dynamic body acceleration), independence timing, onset of post-fledging dispersal, habitat selection, and daily activity rhythms after independence. Our results revealed individuals began independent living 26.23 ± 2.34 days post-fledging and onset of dispersal at 25.58 ± 2.33 days, with a range area at the natal of 2.08 ± 0.56 km^(2). The initial 30 days post-fledging are characterized as an ontogenetic phase marked by a rapid increase in body activity level. Fledglings preferred paddy fields during the independent period rather than the forests they relied on before independence. Interestingly, the daily activity rhythm, particularly foraging behavior, peaked at noon—contrasting with the expected morning and evening activity peaks—likely as an adaptation to avoid periods of peak human activity. Additionally, drowning, collisions, and predation in paddy fields are noteworthy causes of fledgling mortality. Consequently, we recommend protecting a 2-km^(2) area around the nest site for at least two-month post-fledging, implementing safety measures around power lines and cesspools. Additionally, reducing human disturbances near foraging habitats and expanding space within paddy fields would help mitigate survival pressures on fledglings.
文摘Unlike developed countries,the process of ageing in the developing country is a major and serious concern where the health infrastructure,geriatric system and social security remain underdeveloped.This paper aims to assess the gaps in quality of life among the elderly by socio-economic and demographic characteristics and to know the issues and challenges in the selected developing countries where Study on Global Ageing and Adult Health(SAGE)namely China,India,Ghana,South Africa,Mexico,and Russia has been conducted.The overall score indicates that there is a little variation in the quality of life across the countries,ranging from 52.1(China)to 45.5(Ghana).However,there is considerable variation in the quality-of-life score by socio-economic characteristics.From the existing policy perspectives,different aspects of old age policies are varied across the selected countries.The rapid expan-sion of the private sector into these areas is unlikely to benefit the bulk of the elders.The countries like India,South Africa and Mexico,where the private sector plays a major role,lack health care support for the elderly.However,financial support sig-nificantly contributes to the quality of life in terms of policy intervention in those countries.Thus,the respective governments need to address urgently the areas like health care,financial and social security to achieve the healthy lives and wellbeing for all of the sustainable development goals by 2030.
