Casting (induced any time of the year) seemed in itself to be a stimulus for new growth. If casting was blocked by temporarily elevated endogenous steroid levels, growth was delayed until the clear decrease of testosterone (December). Antler growth ceased at the end of March regardless of ...
“That suggests, " Qiu says, “that antler growth is more like that of bone cancer than that of typical bones." However, in contrast to bone cancer, where tumors grow unchecked, antler growth is tightly regulated by the activity of tumor-suppressing and tumor-promoting genes, the team ...
The changes in the testes confirm that the immunizations were effective in blocking the secretion of the gonadotrophic hormones. The re-development of antlers in these animals indicates that gonadotrophins are not directly involved in stimulating antler growth. 展开 ...
While antler size is not greatly affected by nutrition during the growth of immature (velvet) antler, it is influenced by body size and condition at casting, i.e. at the beginning of new antler growth. Antler growth appears to have a high priority for nutrients, especially energy, protein ...
2A and C). A scab is formed from the dried blood within 1–2 days of casting, and it occupies approximately half of the entire casting surface and is surrounded by a ring of shiny velvet-like skin, indicating that a new antler has commenced growth. As the wound healing process advances...
antlered onesdid itsignificantlymoreoftenthan hard antlered males. Also, amongvelvetmales,theoneswithfullygrownantlers,i.e. antlersin theprocessofmineralization,atebonesorantlerssignificantlymore often than other velvet males. Since antler growthis notseasonalinWilpattu theseresultscannotbeexplainedby a...
Casting is in response to a marked decline in testosterone secretion and can be induced by castration (Goss, 1983). New antler growth occurs during the quiescent phase of the testes, in the relative absence of testosterone secretion. Mineralisation (calcium phosphate deposition) of antlers ...
1. 1. Five normal male, 5 female, and 3 castrated fawns and 5 adult male white-tailed deer were housed in individual pens for one year to compare the relationships between thyroxine (T 4) and other blood parameters and the antler cycle. 2. 2. Biweekly serum samples were examined for ...
It has been already suggested, however, that this fits only to one group of species such as white-tailed deer (Odocoileus virginianus), mule-deer (0. hemionus), moose (Alces), reindeer, and caribou (Rangifer), where an interval exists between antler casting and new antler growth. Species ...
Whitetail Deer Antler Growth Cycle The amount of daylight and the season dictate when male white-tailed deershed and grow their antlers. They slowly begin to grow antlers in the springtime, with the growth rate rapidly increasing as summer arrives. Older bucks can grow as much as two inches ...