An experiment was conducted to determine whether prolactin is involved in growth or in mediating the photoperiod-induced growth response in sheep. Prolactin was manipulated by im injections of 2-Br-~-ergocryptine (CB154) or sc injections of ovine prolactin (oPRL) "and by two light:dark regimens (16L: 8D and 8L:16D). Fifty-six wether lambs (two/ pen) were allotted to one of four treatments for a...

We examine the interference of fairness and observers in digital coin systems. Since copying of coins cannot be prevented cryptographically in anonymous off-line coin systems, double-spending detection is one of the major tasks. An observer is a tamper resistant device that prevents doublespending physically, i.e., Alice has no access to her coins and therefore she cannot copy them. Digital coi...

Two experiments were performed to examine the ability of human pancreatic growth hormone releasing factor (hGRF) administration to stimulate endogenous growth hormone (GH) secretion in lambs. Each study utilized eight Dorset wether lambs in replicated 4 X 4 Latin square experiments. Growth hormone response (integrated area under the curve for 150 min post-injection) for 0, 1, 5 and 10 microgram...

Risk aversion has been shown to have adverse effects on agents’ bidding. In private value auctions, risk aversion induces more aggressive bidding, whenever the number of participants remain unchanged. Risk aversion may also prevent agents from entering the auction, in the first place, if a certain outcome is available, which lessens competition and, eventually the agent’s bids. Moreover, if bid...

Eighteen spring-born Columbia ram, wether, and zeranol-implanted ram lambs were examined to determine the influence of castration or zeranol implantation on collagen characteristics of skin, fell, and epimysium and possible relationships between collagen properties of each tissue and difficulty of pelt removal. Pelt removal force was lower in wethers than in rams (P < .05) and intermediate for ...

Recently we reported elimination of radioactivity from [14C]heptachlor from body stores of lactating ovines, mainly into excreta rather than milk, contrasting sharply with bovines. To further assess heptachlor metabolism and clearance by ovines, 12 fine-wool wether larabs (41 + 3 kg) housed in metabolism stalls were fed pelleted alfalfa hay (96%) plus molasses (3%) ad libitum and were dosed i.p...

Context There is concern about potential competition between non-native fallow deer (Dama dama) and livestock for food, particularly during times of low rainfall when pasture scarce.Aims We aimed to estimate the extent which a high-density population (~37deerperkm2) competed with food severe drought on pastoral properties Liverpool Plains, New South Wales, Australia.Methods collected rumen cont...