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Researchers found that hermit crabs constrained by undersized shells do not eat less to slow their growth. Instead, they increase defecation frequency, indicating a lower efficiency in converting consumed food into new tissue. This shifts the mechanism from reduced appetite to altered internal nutrient assimilation.

The finding suggests that growth regulation can occur at the level of metabolic processing rather than just external consumption. While this does not directly explain human weight variation, it highlights that intake and tissue growth are distinct biological processes.

more: https://www.futurity.org/hermit-crabs-growth-shells-3345862/?utm_source=rss&utm_medium=rss&utm_campaign=hermit-crabs-growth-shells-3345862

Research published in the Journal of Applied Psychology shows that employees who are assertive are more likely to be promoted into leadership roles. However, assertiveness does not correlate with the traits that make leaders effective. Effective leaders tend to exhibit high achievement motivation, a preference for order, strong self‑discipline, and optimism.

Organizations that rely on assertiveness as a hiring criterion risk appointing leaders who lack the skills to guide teams well. The study suggests re‑evaluating selection processes to focus on motivation, order, self‑discipline, and optimism instead. Still, the findings are based on aggregated past studies and may not capture all contextual variables that influence leadership success.

more: https://www.futurity.org/personality-leaders-3346102/?utm_source=rss&utm_medium=rss&utm_campaign=personality-leaders-3346102

A Virginia Tech‑led study found that 95% of participants reported a positive effect on their well‑being from feeding and watching birds, compared with 55% for other life events. The research used a standard mental‑well‑being questionnaire over a six‑month period and asked respondents to reflect on how the activity influenced them. The authors identified three key pathways: emotions, engagement, and a sense of meaning.

The results suggest that a simple, low‑cost activity can boost mood and reduce stress for many people. However, the study relies on self‑report from volunteers who already enjoy birdwatching, so it may not apply to the general population. Anyone who wants to feed birds should still follow best‑practice guidelines to minimise risks to wildlife.

more: https://www.futurity.org/feeding-birds-can-make-you-feel-better-3345882/?utm_source=rss&utm_medium=rss&utm_campaign=feeding-birds-can-make-you-feel-better-3345882