For many breeding companies, performance testing in maternal lines is generally confined to traits such as average daily gain (ADG), back fat (BF) and perhaps loin muscle depth or area (LMD or LMA), along with litter size traits such as number born alive (NBA) or total born (TB). More sophisticated breeding programs will also accommodate traits associated with sow performance, longevity or pigl...

The use of a separate fall lambing group is feasible for spreading lamb production out through the year, especially with the use of mature animals. If each lambing group is uniquely identified, the two groups could be commingled for much of the year to make best use of feed resources. The lambing groups only need to be separate at breeding and lambing time, making management less complicated. L...

The objectives of this presentation are to review results of our previous and on-going research with respect to the risk factors and consequences of poor reproductive performance in dairy cows, and to develop an economic framework to optimize decisions related to dairy cow reproductive performance. To make profitable breeding and replacement decisions, the farmer must account for factors includ...

Introduction On many dairy farms, reproductive failure and the occurrence of mastitis are two of the most common management problems. Risk factors for mastitis and reproductive disorders are similar and it can be difficult to determine the specific impact of mastitis on reproductive performance. Age of cow, heat stress, occurrence of metabolic diseases, immune suppression in early lactation and...

The study was conducted to explore various aspects of reproduction in camels viz. Effect of breed on fertility, effect of repeat services during same estrous period on pregnancy rate, effect of copulation time on fertility in female dromedary camels, early versus late onset of sexual libido in males, male fertility and investigations into mating ability, semen donation efficiency in Artificial ...

BACKGROUND AND AIMS Short life cycles and trade-offs linked to breeding systems make bryophytes good models for the study of plant reproductive strategies. Our aim was to test if differences in sexual reproductive performance of bryophytes in tropical rainforests are driven by the breeding system of the species (monoicous or dioicous) or are mainly affected by the habitat. METHODOLOGY The rep...

SYNOPSIS Arnold's 1983 path-analytic paradigm, considering "morphology, performance, and fitness," has been elaborated in several ways. For example, current versions recognize the level of "behavior" (including aspects of motivation) as a filter between performance abilities (only measurable if motivation is maximal) and fitness components. Performance abilities constrain behavior, but behavior...

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Obesity and overweight are not only problem of developed nations but also increasing problem in developing countries with health consequence. Studies have highlighted the link between obesity, infertility and adverse reproductive health outcome. Obesity contribute majorly to two most common medical risks in pregnancy: diabetes and hypertension. Is is associated with increasesd risk of large-for...