Context Mating of ewe lambs can increase farm profitability, although uptake is limited by low reproductive success. Reproductive loss to Day 35 pregnancy in peripubertal greater than adult ewes; however, the precise timing this unknown.Aim We aimed define more clearly early embryo development and key times ewes.Methods Health embryos from naturally cycling crossbred ewes ~8months age were reco...

Context Proximity sensors were used recently to determine the maternal pedigree of lambs on a small plot with high accuracy. If this accuracy is maintained under commercial grazing conditions, method could be useful alternative improving genetic gain in sheep, including reproduction traits. Aims To investigate using proximity and define level interactions required confidently irrespective diffe...

Susceptibility to infection from nematode parasites in sheep is most pronounced in young animals and in periparturient ewes. The susceptibility of young animals is a consequence of an inability to develop effective acquired immune responses to nematode parasites. In the periparturient ewe, susceptibility arises from a temporary loss of acquired immunity. Loss of immunity is associated with a ri...

We present a comprehensive analysis of estimation of fisheries Maximum Sustainable Yield (MSY) reference points using an ecosystem model built for Mille Lacs Lake, the second largest lake within Minnesota, USA. Data from single-species modelling output, extensive annual sampling for species abundances, annual catch-survey, stomach-content analysis for predatory-prey interactions, and expert opi...

Reproductive wastage is a key issue for sheep producers, both regionally and globally. The reproductive output of farm animals can be influenced by physiological and environmental factors. Rapid and reliable quantification of physiological stress can provide a useful tool for designing and testing on-farm management interventions to improve farm animal welfare and productivity. In this study, w...

This paper identifies and analyses a new effect related to the cyclical behaviour of labour supply: Entitled-Worker Effect (EWE). is different from well-known Added-Worker (AWE) Discouraged-Worker (DWE). The EWE consequence one most important institutions: unemployment benefit (UB). We develop model with uncertainty about results job-seeking transaction costs linked such search process, showing...

introduction: gonadotropin inhibitory hormone (gnih) has been known as a key inhibitor of the secretion of gonadotropin releasing hormone (gnrh). ewe has estrous cycles comprising of follicular and luteal phases. follicular phase is in turn divided into proestrous and estrous phases. blood level of lh increases in follicular and decreases in luteal phases. the aim of the present study was to ev...

a crossbreeding experiment involving four iranian fat-tailed sheep breeds, namely kurdi (k), chaal (c), afshari (a) and sanjabi (s) was carried out to determine the ram breed effects on productivity of kurdi fat-tailed ewes (k) under extensive production system. a total of 475 kurdi ewes were mated to 24 rams from four breeds producing 454 lambs including pure kurdi, kk, (116 lambs), afshari × ...

The 1st field outbreak of vermeersiekte induced by Geigeria burkei Harv. subsp. burkei var. hirtella Merxm, is reported. It is also the first recorded outbreak of this disease in the arid sweet bushveld of the Northern Province of South Africa. The toxicosis was experimentally reproduced in a sheep following daily intraruminal administration of 2.5-5.0 g/kg dried, milled plant material for 18 c...