BIOL30001 Lecture Notes - Lecture 9: Citral, Food Energy, Anterior Pituitary

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L9: seasonal breeding a matter of time. Male and femal may not be fertile at the same time they wont completley overlap at the same time in some species they are not in complete sync. May not be the effect of the food calorie balance or it could be the hormones. Hormones and other factors in feed affect timing of breeding or compounds in the food that trigger the reproductive cycle. Seasonal breeding short day breeders or long day breeders depends on the gestation length. Circannual rhythm day length at the top in terms of hours july and augst is the highest in day length prolactin is important. Fsh and testosterone levels of fsh ramps up at the rutting season there is a similar spike for testoesterone in the rutting season decrease in light is paralleles on the fsh and testosterone and prolactin. Main responsibility is that it makes the hormone melatonin which is only.

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