Premium
Hormonal Control of Seasonal Growth in a Temperate Zone Toad Bufo bufo
Author(s) -
WindLarsen Hanne,
Jørgensen C. Barker
Publication year - 1987
Publication title -
acta zoologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.414
H-Index - 37
eISSN - 1463-6395
pISSN - 0001-7272
DOI - 10.1111/j.1463-6395.1987.tb00875.x
Subject(s) - biology , toad , hibernation (computing) , bufo , temperate climate , hormone , zoology , growth hormone , endocrinology , ecology , medicine , state (computer science) , algorithm , computer science
Young toads were exposed to a light regimen of 12L/12D at 21°C and fed meal‐worms before hibernation in the autumn, when the toads reduce feeding and discontinue growth, and after hibernation in the spring, when feeding and growth is resumed. In the autumn treatment of the toads with bovine growth hormone maintained feeding and growth; in the spring the treatment protracted the period of feeding and growth. Thyroxin had no obvious effects on growth. It is concluded that the annual growth pattern of temperate zone toads is controlled by an internal rhythm in the secretion of growth hormone.