When this happens, the thyroid gland is no longer under pituitary control. The amount of hormone it produces is dependent on levels of TSI. TSI are the direct cause of hyperthyroidism in Gravesâ disease and various immune system chemicals known as cytokines also contribute to the symptoms that occur in this disorder.
Iguanas are reptiles and nearly all reptiles lay eggs. There are some reptiles that do not lay eggs, but they are very rare. Female iguanas usually lay a clutch of eggs every year once they're mature. If there is no male iguana, she will still lay eggs, but they won't be fertile.
March is on average the driest month of the year in the Cayman Islands, and the iguanas are highly active as they are entering their breeding season. The value for implied by comparison of conventional distance sampling and repeated counts in our data may, therefore, represent a high point in seasonal availability of iguanas for detection.