the aim of this study was to determine the effect of ewe breed on the reaction time and semencharacteristics in the ram. for this purpose, from the native sheep breeds in iran, seven lory rams and fourewes (two lory and two ghezel breeds) were selected. seven rams were individually subjected to 4 weeklytrials in which one of the following two treatments was applied alternately. all of rams were...

Angus (A), Brown Swiss (S) and A X S reciprocal F t (AS) dams were mated to A, S and AS (also reciprocal F 1 ) sires resulting in nine breed groups of progeny with varying proportions of Angus and Brown Swiss breeding. Breed group of dam and of sire significantly influenced birth weight, preweaning daily gain, weaning weight, 205-d weight, condition score and frame size. The means for birth wei...

Objectives of this study were to evaluate effects of seven sire breed groups and three levels of daily ME intake (DMEI = 132 or 189 kcal ME/kg BW(0.75) or ad libitum), beginning 5 mo prepartum, on BCS, length of postpartum anestrus, and circulating concentrations of IGF-1 and GH in F1 cows (six to eight cows per sire breed in each DMEI group) out of Angus or Hereford dams. At the initiation of ...

Growth is a physiologically demanding process that requires adequate amounts of energy as well as optimal intake of essential nutrients. Key nutritional factors, including energy and calcium, have been identified as important during growth. Large-breed puppies have a genetic tendency toward fast growth rates that can stress developing skeletal structures and result in malformations if left unch...

This study investigated the current management practices associated with stock herding dogs on Australian farms. A parallel goal was to determine whether these practices and the characteristics of the dog handlers were associated with success rates. Success rate refers to the proportion of dogs acquired by the farmer that were retained as working dogs. Data on a total of 4,027 dogs were obtaine...

The objectives of this study were to estimate effects of sire breed (Dorset, Finnsheep, Romanov, Texel, and Montadale), and dam breed (Composite III and Northwestern whiteface) on survival, growth, carcass, and composition traits of F1 lambs. Effects of mating season (August, October, and December) were estimated for survival and growth traits. Data were collected on 4,320 F1 lambs sired by 102...

First-parity Holstein (H), Normande-Holstein (NxH) crossbred, Montbeliarde-Holstein (MxH) crossbred and Scandinavian-Holstein (SxH) crossbred cows calving from June 2001 to December 2003 were compared for dystocia and stillbirths from seven California herds. Dystocia scores ranging from 1 (no assistance) to 5 (hard pull) and stillbirths (1 for alive and 0 for dead) were recorded for 1695 Holste...

Purebred and two-breed cross (F1) boars were mated to F1 females to produce all possible three- and four-breed cross pigs involving the Duroc, Yorkshire, Landrace and Spotted breeds. Individual postweaning average daily gain (ADG), age at 100 kg (AGE) and probed backfat thickness at 100 kg (BF) data were collected on 3,456 pigs. A total of 213 pens with an average of 15.58 pigs per pen was eval...

Key Points  There are few “true” breed sensitivities to anesthetics  Breed idiosyncrasies to various anesthetic, sedative, and analgesic drugs should be considered when formulating an anesthetic plan  Many myths in small animal anesthesia derive from mis-interpretation of data or singular experiences that evolve into “scientific fact”  This lecture will attempt to dispel some common myths a...