translate English to French: Survival rates among juveniles vary considerably from one year to the next depending on the weather conditions and the abundance of predators.
Le taux de survie des jeunes varie considÃ©rablement dâ€™une annÃ©e Ã lâ€™autre, selon les conditions mÃ©tÃ©orologiques et lâ€™abondance de prÃ©dateurs.