Photoperiod, or the daily sequence of light and dark, has dramatic effects on many
physiological systems across animal species. Light patterns alter melatonin secretion …

Puberty is a period at which sexually organs are functionally developed and animals
become able to release the gametes. A cow maturing at early age will also calve at early …

Calves fed large amounts of milk replacer (MR) gain more body weight preweaning than
calves fed less-aggressive programs; however, postweaning growth may be reduced …

Contents Insufficient knowledge has been acquired regarding the prepubertal and pubertal
periods of domestic canids. Until further information becomes available, a better …

The objectives were to evaluate factors affecting reproductive performance of dairy heifers.
Holstein heifers (6389) were housed in a feed lot located in Parma, ID. Each week heifers …

The aim of this study was to check the effect of photoperiod (lightning duration) on dry matter
intake (DMI), water intake, average daily gain (ADG) and body condition score of Sahiwal …

This review aims at giving an overview on the physiological events leading to puberty onset
in mammals and more specifically in cattle. Puberty is an important developmental milestone …

Exposure to a long-day photoperiod (LDPP) increases mammary and lean growth in heifers
relative to a short day (SDPP). Whether these effects influence milk yield, however, is …

Deuterium oxide (D 2 O) dilution methods have been used to assess body composition in
live animals. Estimated body water content can be used to predict body fat and protein, and …

The objective was to determine the effects of feeding prepubertal dairy heifers a high-energy
diet for a duration of 0, 3, 6, or 12 wk on feed intake, growth, and fat deposition. We also …