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Animals that change color with the seasons mainly do so in response to daylight changes, but climate change is causing camouflage problems that may require evolutionary changes.

Researchers found genes that control hair color and growth change before the visible coat color changes in snowshoe hares.

Genes related to pigmentation, body rhythms, and behavior change during hares' seasonal coat color transition, with a common genetic mechanism in two hare species.

Human skin's melanocytes respond to light by changing shape, producing pigments and hormones, which may affect sleep patterns.

Melatonin helps regulate hair growth and protects the hair follicle from stress.

Adult male raccoon dogs shed their winter fur in spring and grow new fur for winter in autumn.

Environmental factors like temperature and nutrition affect hair growth, with humans showing seasonal hair growth differences.

Vitamin A deficiency changes cattle hair structure, while pregnancy may improve it, suggesting hair can indicate cattle health.

Hair growth is influenced by hormones and goes through different phases; androgens can both promote and inhibit hair growth depending on the body area.

Androgens can both stimulate and cause hair loss, and understanding their effects is key to treating hair disorders.

Adrenal glands delay the start of winter fur growth in mink.

Androgens can both increase and decrease hair growth in different parts of the body.

Prolactin affects when mice shed and grow hair.

Prolactin affects when mice shed and grow hair.

Prolactin affects hair growth cycles and can cause early hair follicle regression.

The document concludes that understanding hair and feather regeneration can help develop new regenerative medicine strategies.

Artificially inducing hair regrowth in mice can change the normal pattern and timing of hair growth, with minimal color differences between old and new fur.

Melatonin treatment speeds up fur maturation and changes the hair growth cycle in young chinchillas.

Cashmere and milk goats have different hair growth cycles and gene expressions, which could help improve wool production.

The document concludes that for hair and feather growth, it's better to target the environment around stem cells than the cells themselves.

Mouflon rams mature gradually with changes in body, horns, and hormones linked to age and seasons, reaching full sexual maturity well after puberty.

Hair growth is influenced by interactions between skin layers, growth factors, and hormones, but the exact mechanisms are not fully understood.

Human skin can make serotonin and melatonin, which help protect and maintain it.

Researchers found that hair shedding happens mostly when new hair is growing and involves a unique process.

The article concludes that better understanding gene regulation related to seasonal changes can offer insights into the mechanisms of seasonal timing in mammals.

Red deer only have androgen receptors in neck hair cells for mane growth during breeding season.

Goat skin changes with the seasons due to genes affected by daylight and hormones.

Androgens can cause hair growth in some areas and hair loss on the scalp.

The document concludes that early diagnosis and treatment are crucial for managing skin diseases in ferrets.

Prolactin contributes to hair loss by promoting hair follicle shrinkage and cell death.