Sibling competition lengthens while hazardous environments shorten optimal human birth spacing
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Sibling competition lengthens while hazardous environments shorten optimal human birth spacing. The researchers developed a state-dependent optimality model to examine how birth intervals adapt to ecology and sibling competition. They found that high mortality environments lead to shorter birth spacing, while greater sibling competition leads to longer spacing between births. The model provides plausible mechanisms for how reproductive schedules adapt but does not include menopause; future work could examine additional factors.
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The treatment consists of replacing lost liquids and electrolytes (drinking drinking water and other recommended liquids, including consumption of juicy fruits such as papayas, apples, pears, among others that contain water in their composition).
To prevent this, it is necessary to promote health education, improve the hygienic-sanitary conditions of markets and communities in general as a way of promoting, preserving and prolonging PUBLIC HEALTH.
Gastritis and Gastric Health
Gastric Health is one of the most relevant concerns in human health, with gastrointestinal infections being among the main illnesses that affect humans.
Among gastric problems, we have GASTRITIS AND GASTRIC ULCERS as the main public health problems. Gastritis and gastric ulcers normally result from inflammation and corrosion of the walls of the stomach (gastric mucosa) and are generally associated (caused) by the bacterium Helicobacter pylor, which, according to the literature, this bacterium settles on these walls (of the stomach) and starts to release urease that ends up altering the normal pH of the stomach (acid), which leads to inflammation and corrosion of the mucous membranes and consequent gastritis or ulcers, respectively.
In addition to bacterial infections, gastritis and gastric ulcers are associated with several factors, with emphasis on prolonged fasting, chemical substances including drugs, alcohol, foods with strong seasonings including chilli, which ends up causing inflammation of the stomach walls and/or corrosion. of the same, resulting in the appearance of wounds and consequent gastritis or ulcers, respectively.
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Giloy, also known as Guduchi or Amrita in classical Ayurvedic texts, is a revered herb renowned for its myriad health benefits. It is categorized as a Rasayana, meaning it has rejuvenating properties that enhance vitality and longevity. Giloy is celebrated for its ability to boost the immune system, detoxify the body, and promote overall wellness. Its anti-inflammatory, antipyretic, and antioxidant properties make it a staple in managing conditions like fever, diabetes, and stress. The versatility and efficacy of Giloy in supporting health naturally highlight its importance in Ayurveda. At Planet Ayurveda, we provide a comprehensive range of health services and 100% herbal supplements that harness the power of natural ingredients like Giloy. Our products are globally available and affordable, ensuring that everyone can benefit from the ancient wisdom of Ayurveda. If you or your loved ones are dealing with health issues, contact Planet Ayurveda at 01725214040 to book an online video consultation with our professional doctors. Let us help you achieve optimal health and wellness naturally.
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- 1. Sibling competition lengthens while hazardous environments shorten optimal human birth spacing Matthew G Thomas†1, Daryl P Shanley†2, Thomas B L Kirkwood2 and Ruth Mace1 1 Human Evolutionary Ecology Group, University College London, UK 2 Institute for Ageing and Health, Newcastle University, UK
- 2. Birth intervals increase with age… … and range 3-5 years in natural fertility populations Younger children can increase their siblings’ risk of dying
- 3. Question: How do birth intervals adapt to ecology and sibling competition? We developed a state-dependent optimality model Optimises reproductive decisions, given female’s state Females have a state: Her age and the ages of her children
- 4. How do birth intervals adapt to ecology? Probability of death High mortality environment (Tsimane foragers) 1 0.8 0.6 Low mortality environment (1960s Sweden) 0.4 0.2 0 0 10 20 30 40 50 Age (years) 60 70 80 90
- 5. Sibling competition increases mortality Weight on siblings’ mortality 1 High intensity competition 0.8 Low intensity competition 0.6 0.4 Medium intensity competition 0.2 No competition 0 0 -0.2 2 4 6 8 Child age (years) 10 12 14
- 6. Results
- 7. High mortality environments shorten birth spacing 4 Birth interval (years) Low mortality environment (1960s Sweden) 3 2 High mortality environment (Tsimane) 1 Age (years) 0 15 30 45 60 75 90
- 8. Sibling competition lengthens birth intervals 5 Birth interval (years) High competition Medium competition 4 3 2 Low competition No competition 1 Low mortality environment (Modern Sweden) 0 15 40 65 90 15 Age (years) High mortality environment (Tsimane) 40 65 90
- 9. We have shown plausible mechanisms for how reproductive schedules adapt to mortality risks But no menopause Our state-dependent framework can also - examine juvenile help - test ‘mother effect’
- 10. Collaborators: Daryl Shanley (joint first author) Tom Kirkwood; Ruth Mace Thanks: Human Evolutionary Ecology Group (UCL)