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Artigos de revistas sobre o tema "Ewes South Australia Fertility"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 28 de janeiro de 2023

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1

Adams, NR, MR Sanders, and AJ Ritar. "Oestrogenic damage and reduced fertility in ewe flocks in south Western Australia." Australian Journal of Agricultural Research 39, no. 1 (1988): 71. http://dx.doi.org/10.1071/ar9880071.

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Prolonged exposure to oestrogen causes transsexual redifferentiation in the ewe, which can be assessed experimentally by measuring the cross-sectional area of lamina propria (lp) tissue lying underneath the cervical folds in the mid-cervix. The extent of transsexual redifferentiation caused by prolonged exposure to clover oestrogens was measured in ewes from 13 farms in Western Australia. Groups of 90-157 mature ewes were mated under normal farming husbandry, and consigned to the abattoirs 6-8 weeks later. Histological sections were prepared from the mid cervix of 37-80 ewes from each flock. T

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2

Kleemann, David O., Simon K. Walker, Raul W. Ponzoni, Dennis R. Gifford, James R. W. Walkley, Darryl H. Smith, Richard J. Grimson, Kaylene S. Jaensch, Samuel F. Walkom, and Forbes D. Brien. "Effect of previous reproductive performance on current reproductive rate in South Australian Merino ewes." Animal Production Science 56, no. 4 (2016): 716. http://dx.doi.org/10.1071/an15114.

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Reproductive performance of ewes in the current year may be influenced by their performance in the previous year and by the ability of seasonal and management conditions to facilitate full recovery before the next breeding cycle. This possibility was tested by analysing reproductive data from 2100 South Australian Merino ewes mated to Merino rams annually from 1991 to 1997. The model fitted to the data included the fixed effects of previous reproductive performance (PRP) (no lambs born; single or multiple lambs born, none reared; single lambs born, singles reared; multiples born, singles reare

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3

Kleemann, DO, RW Ponzoni, JE Stafford, and RJ Grimson. "Carcass composition of the South Australian Merino and its crosses with the Booroola and Trangie Fertility Merino." Australian Journal of Experimental Agriculture 28, no. 2 (1988): 167. http://dx.doi.org/10.1071/ea9880167.

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South Australian medium-wool (M), non- Peppin medium-wool Booroola (B) and Peppin medium-wool Trangie Fertility (TF) Merino rams were joined to M ewes at Turretfield Research Centre, South Australia, in 2 years. Carcass composition was assessed in the ewe and wether progeny at 2 mean slaughter liveweights, viz. 24 and 38 kg. When adjusted to the same carcass weight, B x M had 13% more carcass chemical fat, 15% more subcutaneous fat, 6% less bone and the same lean tissue as M. The same result was observed for TF x M in relation to M in year 2. However, TF x M had more lean and the same amount o

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4

Barwick, S. A., D. J. Brown, B. R. Cullis, A. K. Bell, T. J. May, M. W. Lollback, I. M. Rogan, et al. "The performance of the Border Leicester in Australia." Animal Production Science 61, no. 1 (2021): 1. http://dx.doi.org/10.1071/an19493.

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Aims We examine the average performance of Border Leicester (BL) flocks that are part of LAMBPLAN, Australia’s sheep performance recording and genetic evaluation system. We also summarise outcomes from the New South Wales Department of Primary Industry’s research on BL improvement, and discuss the performance required for the BL to continue to be a pivotal part of the Australian prime lamb industry. Key results Modest gains have been recorded in the BL in growth since 2000 and faecal egg counts have reduced, suggesting improved worm resistance. The net reproductive rate has slightly improved,

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5

Harrison, Matthew T., Karen M. Christie, Richard P. Rawnsley, and Richard J. Eckard. "Modelling pasture management and livestock genotype interventions to improve whole-farm productivity and reduce greenhouse gas emissions intensities." Animal Production Science 54, no. 12 (2014): 2018. http://dx.doi.org/10.1071/an14421.

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Livestock greenhouse gas (GHG) emissions form the largest proportion of emissions from agriculture. Here we seek intervention strategies for sustainably intensifying the productivity of prime lamb enterprises without increasing net farm emissions. We apply a biophysical model and an emissions calculator to determine the implications of several interventions to a prime lamb farm in south-eastern Australia. We examine the effects of lamb liveweight or age at sale, weaning rate, maiden ewe joining age, genetic feed-use efficiency, supplementary grain feeding according to green pasture availabilit

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6

Hinch, G. N., M. Lollback, S. Hatcher, J. Hoad, R. Marchant, D. F. Mackay, and J. M. Scott. "Effects of three whole-farmlet management systems on Merino ewe fat scores and reproduction." Animal Production Science 53, no. 8 (2013): 740. http://dx.doi.org/10.1071/an12440.

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As part of the Cicerone Project’s whole-farmlet experiment on the Northern Tablelands of New South Wales, Australia, the fat scores and reproductive performance of ewes were measured to assess the effect of different management systems on these important production parameters over time. The three farmlets (each of 53 ha) included one (farmlet B) subjected to ‘typical’ district management consisting of moderate levels of inputs and a target stocking rate of 7.5 dse/ha, with flexible grazing management across eight paddocks. A second farmlet (A) was managed in a similar fashion to farmlet B with

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Graham, J. F., B. R. Cullen, G. M. Lodge, M. H. Andrew, B. P. Christy, P. J. Holst, X. Wang, S. R. Murphy, and A. N. Thompson. "SGS Animal Production Theme: effect of grazing system on animal productivity and sustainability across southern Australia." Australian Journal of Experimental Agriculture 43, no. 8 (2003): 977. http://dx.doi.org/10.1071/ea02197.

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The effects of various grazing management systems on sown, naturalised, and native pastures were studied at 6 different locations in the temperate high rainfall zone (HRZ, >600 mm rainfall/year) of southern Australia, as part of the Sustainable Grazing Systems (SGS) Program. The treatments examined had different pasture species and fertiliser management, with grazing method ranging from set stocking (continuous grazing) to rotation with rests based on pre- and post-grazing herbage mass or season and plant phenology. Sites were located at: Albany, Western Australia; Manilla, Barraba, Nundle,

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8

Robertson, S. M. "Crop stubbles are as important for sheep production as annual pastures in the Victorian Mallee." Australian Journal of Experimental Agriculture 46, no. 8 (2006): 993. http://dx.doi.org/10.1071/ea04033.

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The impact of different management strategies on production and profit can be evaluated with knowledge of how sheep production responds to changes in the available feed base and sheep or pasture management. This study aimed to quantify on-farm pasture and sheep production in mixed sheep and cropping systems in the Victorian Mallee of south-eastern Australia (325 ± 50 mm annual rainfall) as a prelude to computer simulation modelling. During 2001 (average rainfall) and 2002 (extreme drought) pasture production, the feed base and sheep production were monitored in 15 paddocks on 5 properties loca

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9

Cottle, D., C. A. Gaden, J. Hoad, D. Lance, J. Smith, and J. M. Scott. "The effects of pasture inputs and intensive rotational grazing on superfine wool production, quality and income." Animal Production Science 53, no. 8 (2013): 750. http://dx.doi.org/10.1071/an12289.

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A farmlet experiment was conducted between July 2000 and December 2006 as part of the Cicerone Project, which sought to enhance the profitability and sustainability of grazing enterprises on the Northern Tablelands of New South Wales, Australia. A self-replacing Merino enterprise was grazed as the dominant livestock enterprise, together with ~20% of the carrying capacity as cattle, on each of three farmlet treatments: higher levels of soil fertility and pasture renovation with flexible rotational grazing over eight paddocks (farmlet A), moderate soil fertility and pasture renovation with flexi

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10

Kleemann, DO, RW Ponzoni, JE Stafford, IN Cutten, and RJ Grimson. "Growth and carcass characters of the South Australian Merino and its crosses with the Booroola and Trangie Fertility Merino." Australian Journal of Experimental Agriculture 25, no. 4 (1985): 750. http://dx.doi.org/10.1071/ea9850750.

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South Australian Merino (M) and highly fecund Booroola (B) and Trangie Fertility (TF) Merino strain rams were mated to M ewes to produce M, B x M and TF x M progeny. At 4-5 months of age (24-kg slaughter group), TF x M and M lambs were heavier than B x M lambs (25.3 and 24.8 kg respectively, v. 228 kg). Similar proportional strain differences were observed at 14-1 5 months of age (38-kg slaughter group), except that, in one year, no difference was observed between the M and B x M strains, resulting in a strain x year interaction (P<0.05). When adjusted for age, TF x M carcasses were heavier

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11

Croker, KP, RI Cox, MA Johns, TJ Johnson, D. Roberts, M. Salerian, and F. Sunderman. "Potential for Fecundin to Influence the Reproductive Performance of Merino Ewes in Western Australia." Australian Journal of Biological Sciences 41, no. 1 (1988): 47. http://dx.doi.org/10.1071/bi9880047.

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Four experiments were conducted at different locations in Western Australia to evaluate the effectiveness of immunizing young (maiden, 1 liz year old) and adult Merino ewes with Fecundin to improve their reproductive performances. The ovulation rates of immunized maiden ewes was increased (0�06-0�30) above that of untreated ewes in both experiments 1 and 2. However, there were no significant improvements in the marking percentages for the immunized ewes with the differences between the untreated and immunized ewes ranging from -16�4 to 5�8070. In comparison with untreated ewes immunization 6 a

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12

Campbell, A. J. D., J. W. A. Larsen, and A. L. Vizard. "The effect of annual shearing time on wool production by a spring-lambing Merino flock in south-eastern Australia." Animal Production Science 51, no. 10 (2011): 939. http://dx.doi.org/10.1071/an10270.

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Time of shearing affects many aspects of wool production and sheep health but no study has examined these factors concurrently in a spring-lambing, self-replacing Merino flock in southern Australia. A 5-year field experiment compared wool production in spring-lambing Merino ewes and their progeny shorn at different times and managed under commercial conditions in south-eastern Australia. Groups of 200 adult ewes were shorn in December, March or May, and their progeny were shorn in December or October, March or June, or May or July, respectively. There was no consistent association between time

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13

Behrendt, R., A. J. van Burgel, A. Bailey, P. Barber, M. Curnow, D. J. Gordon, J. E. Hocking Edwards, C. M. Oldham, and A. N. Thompson. "On-farm paddock-scale comparisons across southern Australia confirm that increasing the nutrition of Merino ewes improves their production and the lifetime performance of their progeny." Animal Production Science 51, no. 9 (2011): 805. http://dx.doi.org/10.1071/an10183.

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Experiments conducted by Lifetimewool at plot-scale have shown that differences in the maternal liveweight during pregnancy and lactation (liveweight profiles) of individual Merino ewes influences their wool production and reproductive rate as well as the birthweight, survival, weaning weight and lifetime wool production of their lambs in a predictable manner. This study determined whether these impacts of nutrition of the ewe on ewe and progeny performance are measurable on commercial properties across southern Australia at a paddock-scale where ewes were aggregated into flocks with a greater

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14

Craig, AD. "Pasture production of two cultivars of Trifolium subterraneum at Kybybolite, South Australia." Australian Journal of Experimental Agriculture 32, no. 5 (1992): 611. http://dx.doi.org/10.1071/ea9920611.

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Two cultivars of subterranean clover, Trikkala and Mt Barker, were continuously grazed by Merino ewes and lambs at 3 stocking rates (8, 13, and 18 ewes/ha) from 1976 to 198 1. The pastures were assessed for clover seedling density, pasture availability and composition, seed reserves, and oestrogen content. Trikkala produced consistently higher seed yields than Mt Barker, with an average yield 3.36 times that of Mt Barker by January 1981 (1178 v. 350 kg/ka). The higher Trikkala seed yields resulted in improved clover seedling densities and increased amounts of clover in the pastures. At the las

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15

Newman, Lareen A., and Graeme J. Hugo. "Women’s fertility, religion and education in a low-fertility population: Evidence from South Australia." Journal of Population Research 23, no. 1 (March 2006): 41–66. http://dx.doi.org/10.1007/bf03031867.

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Craig, AD. "The performance of Merino ewes and lambs grazing two cultivars of Trifolium subterraneum at Kybybolite, South Australia." Australian Journal of Experimental Agriculture 32, no. 5 (1992): 605. http://dx.doi.org/10.1071/ea9920605.

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Two cultivars of subterranean clover, Trikkala and Mt Barker, were continuously grazed by Merino ewes and lambs at 3 stocking rates (8, 13, 18 ewes/ha) from 1976 to 1981. The sheep were assessed for liveweight, fleeceweight, fibre diameter, staple length, wool yield and lambing performance including lambing, marking and weaning percentage. From September 1978 onward, ewes grazing Trikkala pastures were consistently heavier than those grazing Mt Barker pastures, and they produced heavier fleeces in 1978 and 1980, with a 3 and 9% greater total wool production. The heavier fleeces of 1980 were as

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17

Lee, G. J., M. A. Sladek, S. Hatcher, and J. S. Richards. "Using partial records to identify productive older ewes to retain in the breeding flock to increase the flock net reproduction rate." Animal Production Science 54, no. 10 (2014): 1631. http://dx.doi.org/10.1071/an14435.

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The reproductive performance of 7286 ewes from three Merino genetic resource flocks maintained in the central-western region of New South Wales was used to compare the use of fertility and fecundity information and net reproduction information whether recorded early (at 2 and 3 years of age) or later in life (at 4 and 5 years of age) with lifetime performance (at 2–6 years of age) as alternative selection criteria to identify productive older ewes to retain in the breeding flock. While the lifetime net reproduction rate is the best indicator of a ewe’s reproductive performance in later life, p

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18

Mitchell, M. L., M. R. McCaskill, and R. D. Armstrong. "Phosphorus fertiliser management for pastures based on native grasses in south-eastern Australia." Crop and Pasture Science 70, no. 12 (2019): 1044. http://dx.doi.org/10.1071/cp19217.

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Approximately 3.1 Mha (22%) of the agricultural area of south-eastern Australia can be classified as native pasture. There is the assumption that, owing to the widespread occurrence of low-fertility soils in Australia, native grass species do not respond to increased phosphorus (P) fertility. Currently, there are no industry recommendations of target soil-test P values for native-grass-based pastures. This paper reviews the responses of perennial native pasture species endemic to south-eastern Australia to P application in controlled environments, surveys, replicated experiments and paired-pad

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19

Young, J. M., A. N. Thompson, M. Curnow, and C. M. Oldham. "Whole-farm profit and the optimum maternal liveweight profile of Merino ewe flocks lambing in winter and spring are influenced by the effects of ewe nutrition on the progeny's survival and lifetime wool production." Animal Production Science 51, no. 9 (2011): 821. http://dx.doi.org/10.1071/an10078.

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Profitability of sheep production systems in southern Australia is optimised at a stocking rate that provides adequate nutrition for breeding ewes and enables efficient utilisation of grown pasture and supplements. In this paper we used bio-economic modelling to develop optimum liveweight1 profiles for spring-lambing Merino ewes in different environments. The modelling included the impacts of the ewe liveweight profile on the production of the ewe and the survival and lifetime wool production of her progeny. Fifteen ewe liveweight profiles were analysed for each region to determine the profita

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20

Lockwood, A., J. Trompf, L. Kubeil, A. Thompson, G. Refshauge, G. Kearney, and S. Hancock. "Decreasing the mob size but not stocking rate of ewes at lambing increases the survival of twin lambs born on farms across southern Australia." Animal Production Science 60, no. 16 (2020): 1949. http://dx.doi.org/10.1071/an19632.

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Context Data collected from producers in south-eastern Australia found that the survival of twin-born lambs decreased by 3.5% for each extra 100 ewes in the mob at lambing. Increasing stocking rate by 1 ewe/ha decreased lamb survival by a further 0.7%. These survey findings suggest that lamb survival could be improved by optimising the allocation of ewes to mobs and paddocks at lambing. Aim The present paper reports two experiments. Experiment 1 tested the hypotheses that (1) the survival of twin-born lambs would be greater when ewes lamb in smaller mobs and at lower stocking rates, and (2) th

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21

Croker, KP, MA Johns, AH Williams, SR McPhee, and LD Staples. "Effect of treatment with melatonin implants in conjunction with teaser rams on the reproductive performances of Poll Dorset x Merino ewes joined in early summer in the south-west of Western Australia." Australian Journal of Experimental Agriculture 32, no. 8 (1992): 1045. http://dx.doi.org/10.1071/ea9921045.

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Melatonin pretreatment to improve the reproductive performance of first-cross Poll Dorset x Merino ewes joined in early summer was investigated in 2 experiments conducted in consecutive years. In experiment 1, melatonin pellets were administered subcutaneously to 1 of 3 groups of ewes; 14 days later they were joined with testosterone-primed wethers ('teasers'), followed after 15 days by entire rams (melatonin-teased group). The other groups were untreated and teased only. Experiment 2 consisted only of teased and melatonin-teased groups, with the ewes from experiment 1 being reallocated, as we

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22

Lattimore, MAE. "Pastures in temperate rice rotations of south-eastern Australia." Australian Journal of Experimental Agriculture 34, no. 7 (1994): 959. http://dx.doi.org/10.1071/ea9940959.

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Legume-based pastures have long been an integral part of rice growing in the southern New South Wales irrigation areas and still offer potential to improve the productivity, profitability, and sustainability of the temperate rice-cropping system.This paper reviews both historical and current aspects of pastures in temperate rice rotations in southern New South Wales and highlights the importance of pastures in sustaining this cropping system as environmental pressures increase. Topics discussed include pasture species and rotations, their role in improving soil fertility and sustainability, th

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23

Freer, M., JR Donnelly, A. Axelsen, H. Dove, and DG Fowler. "Prime lamb production in relation to time of mating." Australian Journal of Experimental Agriculture 34, no. 1 (1994): 1. http://dx.doi.org/10.1071/ea9940001.

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Over 3 years, we examined the possible benefits of moving the joining date from mid March to early February for the productivity of a prime lamb system based on Border Leicester x Merino ewes on the southern tablelands of New South Wales. The proportion of ewes with >1 lamb (fertility) was affected more by year and by age of ewe than by joining date. The mean proportion of fertile ewes with >1 lamb (fecundity) was reduced from 0.28 to 0.15 at the earlier date, while immunisation against androstenedione increased fecundity at both mating times to 0.42 but significantly reduced fertility i

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24

Charlick, AJ, and GW Arnold. "Effect of bearing and rearing lambs on Merino wool production." Australian Journal of Experimental Agriculture 30, no. 5 (1990): 591. http://dx.doi.org/10.1071/ea9900591.

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Over a 15-year period, the greasy fleece weights of medium-wooled Merino ewes lambing in June in a 625 mm winter rainfall area in south-western Australia were examined in relation to the numbers of lambs born and reared. The ewes were set stocked at 6.7 ewes/ha on annual pasture. During this period selection for increased wool production was undertaken. A generalised linear model was used to assess the effects of bearing and rearing lambs. There was a significant (P<0.05) year x lambing interaction because of a different response over years 1-7 from that over years 8-15. Over years 1-7 when

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25

Yusuf, Farhat, and Dora Briggs. "Trends in legalized abortion in South Australia: 1970–81." Journal of Biosocial Science 17, no. 2 (April 1985): 215–21. http://dx.doi.org/10.1017/s0021932000015674.

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SummaryOfficial abortion statistics for South Australia for the years 1977–81 were examined and compared with those for 1970–76 reported earlier. The period 1970–81 represents the first 12 years' experience of legalized abortion in South Australia. A consistent increase in the incidence of abortion was noted, both in absolute numbers and in proportion to the number of live births. South Australia continued to experience lower fertility than other Australian states, although this would have been higher than in other states had it not been for the legalization of abortion. More of the younger an

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26

Mayberry, Chris, Shane K. Maloney, Peter Mawson, and Roberta Bencini. "Seasonal anoestrus in western grey kangaroos (Macropus fuliginosus ocydromus) in south-western Australia." Australian Mammalogy 32, no. 2 (2010): 189. http://dx.doi.org/10.1071/am09029.

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Public opposition to culling has generated interest in wildlife management through fertility control. Temporary, non-invasive methods of fertility control, such as by xenobiotics, can be best employed with an understanding of the target species’ breeding cycle. We used head length to calculate the conception date of 136 pouch-young of western grey kangaroos (Macropus fuliginosus ocydromus) from four sites around Perth, Western Australia, between May 2006 and October 2008: Thomsons Lake Nature Reserve (n = 80), Harry Waring Marsupial Reserve (n = 11), Melville Glades Golf Club (n = 29), and Mar

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Tyrell, LD, JWA Larsen, and N. Anderson. "Breech-strike on mulesed, clipped and unmulesed Merino ewes and hoggets in south-eastern Australia." Australian Veterinary Journal 92, no. 9 (August 24, 2014): 348–56. http://dx.doi.org/10.1111/avj.12228.

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Lee, G. J., K. D. Atkins, and M. A. Sladek. "Heterogeneity of lifetime reproductive performance, its components and associations with wool production and liveweight of Merino ewes." Animal Production Science 49, no. 7 (2009): 624. http://dx.doi.org/10.1071/an09013.

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The heterogeneity in lifetime (2–6 years of age) reproductive performance within three research flocks maintained at the Agricultural Research Centre, Trangie, in central-western New South Wales, was used to establish the potential to improve flock reproductive performance by identifying performance segments for either selection or for differential management. The data comprised a total of 32 716 records from 7322 ewes, collected over the period from 1977 to 2003. Within each of the flocks, there were large differences (P < 0.001) in lifetime net reproduction rate, and each of its component

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Wheeler, SH, and DR King. "The European Rabbit in South- Western Australia II. Reproduction." Wildlife Research 12, no. 2 (1985): 197. http://dx.doi.org/10.1071/wr9850197.

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'The reproduction of the European rabbit, Oryctolagus cuniculus (L.), at two intensive study sites in south-western Australia is compared with reproductive data from rabbits taken throughout the coastal and inland districts of the south-west region. South-western Australia has hot, arid summers and cool wet winters. Rabbit breeding in the region is characteristic of that in Mediterranean climates, with a winter breeding season which begins when pastures germinate with the initial winter rainfall (April-May) and ceases when the pastures dry out at the end of the year. Unseasonal cyclonic rain c

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Edwards, J. E. Hocking, K. J. Copping, and A. N. Thompson. "Managing the nutrition of twin-bearing ewes during pregnancy using Lifetimewool recommendations increases production of twin lambs." Animal Production Science 51, no. 9 (2011): 813. http://dx.doi.org/10.1071/an09158.

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The effect on ewe and lamb production by differential management of single- and twin-bearing Merino ewes during pregnancy and lactation was examined. The hypothesis that the survival and productivity of single- and twin-born progeny is not affected by differential management of single- and twin-bearing ewes was tested. To test this hypothesis, two ewe flocks were monitored on a commercial property in the south-east of South Australia. The body condition score of one flock of ewes was managed according to Lifetimewool recommendations for southern Australian (Lifetimewool flock; n = 464). Lifeti

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Kelly, RW. "Lamb mortality and growth to weaning in commercial Merino flocks in Western Australia." Australian Journal of Agricultural Research 43, no. 6 (1992): 1399. http://dx.doi.org/10.1071/ar9921399.

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Eighteen farm flocks of four-tooth Merino ewes (average of 371 ewes at lamb marking, range 278 to 511) were studied in 1987/88 ( n =8 ) and 1988/89 (n=10) over the period from 2 to 4 weeks pre-joining until 12 weeks post-lambing. All farms were located in the south-west of Western Australia, and the flocks started lambing between mid-April and mid-July. The average liveweights of ewes pre-joining ranged over 40.2 to 61.8 kg, and average condition scores ranged from 2.2 to 4.2. Mean liveweight changes of the ewes ranged over losses of up to 8.5 kg to gains of up to 10.4 kg between consecutive r

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Harries, Martin, Ken C. Flower, and Craig A. Scanlan. "Sustainability of nutrient management in grain production systems of south-west Australia." Crop and Pasture Science 72, no. 3 (2021): 197. http://dx.doi.org/10.1071/cp20403.

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Balancing nutrient inputs and exports is essential to maintaining soil fertility in rainfed crop and pasture farming systems. Soil nutrient balances of land used for crop and pasture production in the south-west of Western Australia were assessed through survey data comprising biophysical measurements and farm management records (2010–15) across 184 fields spanning 14 Mha. Key findings were that nitrogen (N) inputs via fertiliser or biological N2 fixation in 60% of fields, and potassium (K) inputs in 90% of fields, were inadequate to balance exports despite increases in fertiliser usage and ad

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Masters, David G., and Andrew N. Thompson. "Grazing crops: implications for reproducing sheep." Animal Production Science 56, no. 4 (2016): 655. http://dx.doi.org/10.1071/an14517.

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Integration of crops and livestock has been revitalised in Australia, initially as an opportunity to increase cropping within the high-rainfall grazing zones, and more recently, to improve enterprise diversification and profitability across the low-, medium- and high-rainfall, and mixed-farming zones. Young crops are highly digestible (>80% dry matter digestibility, DMD) with a high energy density (>12 MJ/kg DM) and, in much of southern Australia, fill a winter feed gap. The quality and time of feed availability also coincide with the high nutrient requirements of ewes in late pregnancy

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Baatar, B., L. A. Parra-Avila, M. L. Fiorentini, P. Polito, and A. J. Crawford. "Porphyry Cu fertility of the Loch Lilly-Kars Belt, Western New South Wales, Australia." Australian Journal of Earth Sciences 67, no. 1 (July 25, 2019): 75–87. http://dx.doi.org/10.1080/08120099.2019.1637937.

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Botha, Willings, Natasha Donnolley, Marian Shanahan, and Georgina M. Chambers. "Assessment of the societal and individual preferences for fertility treatment in Australia: study protocol for stated preference discrete choice experiments." BMJ Open 8, no. 2 (February 2018): e020509. http://dx.doi.org/10.1136/bmjopen-2017-020509.

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IntroductionIn Australia, societal and individual preferences for funding fertility treatment remain largely unknown. This has resulted in a lack of evidence about willingness to pay (WTP) for fertility treatment by either the general population (the funders) or infertile individuals (who directly benefit). Using a stated preference discrete choice experiment (SPDCE) approach has been suggested as a more appropriate method to inform economic evaluations of fertility treatment. We outline the protocol for an ongoing study which aims to assess fertility treatment preferences of both the general

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Jenkins, Cheryl, Martina Jelocnik, Emily Onizawa, Justine McNally, Ronald Coilparampil, Pedro Pinczowski, Daniel Bogema, and Thomas Westermann. "Chlamydia pecorum Ovine Abortion: Associations between Maternal Infection and Perinatal Mortality." Pathogens 10, no. 11 (October 22, 2021): 1367. http://dx.doi.org/10.3390/pathogens10111367.

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Chlamydia pecorum is a common gastrointestinal inhabitant of livestock but infections can manifest in a broad array of clinical presentations and in a range of host species. While C. pecorum is a known cause of ovine abortion, clinical cases have only recently been described in detail. Here, the prevalence and sequence types (STs) of C. pecorum in ewes from a property experiencing high levels of perinatal mortality (PNM) in New South Wales (NSW), Australia, were investigated using serological and molecular methods. Ewes that were PNM+ were statistically more likely to test seropositive compare

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Cottle, D. J., M. T. Harrison, and A. Ghahramani. "Sheep greenhouse gas emission intensities under different management practices, climate zones and enterprise types." Animal Production Science 56, no. 3 (2016): 507. http://dx.doi.org/10.1071/an15327.

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Greenhouse gas emissions (GHG) from broadacre sheep farms constitute ~16% of Australia’s total livestock emissions. To study the diversity of Australian sheep farming enterprises a combination of modelling packages was used to calculate GHG emissions from three sheep enterprises (Merino ewe production for wool and meat, Merino-cross ewes with an emphasis on lamb production, and Merino wethers for fine wool production) at 28 sites across eight climate zones in southern Australia. GHG emissions per ha, per dry sheep equivalents and emissions intensity (EI) per tonne of clean wool or liveweight s

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Davies, H. Lloyd, and I. N. Southey. "Effects of grazing management and stocking rate on pasture production, ewe liveweight, ewe fertility and lamb growth on subterranean clover-based pasture in Western Australia." Australian Journal of Experimental Agriculture 41, no. 2 (2001): 161. http://dx.doi.org/10.1071/ea00012.

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Border Leicester x Merino ewes joined to Dorset Horn rams were grazed for 3 years on subterranean clover-based pastures established on virgin ground at Bakers Hill, Western Australia, at 3 stocking rates and 2 systems of grazing management (viz. continuous grazing compared with a deferred grazing system which was designed to ensure that pasture availability met the nutritional requirements of breeding ewes at critical phases of their reproductive cycle). Both stocking rate and grazing management affected pasture availability: there was always a greater amount of pasture available on offer unde

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Schoch, Conrad L., Pedro W. Crous, Giancarlo Polizzi, and Steven T. Koike. "Female Fertility and Single Nucleotide Polymorphism Comparisons in Cylindrocladium pauciramosum." Plant Disease 85, no. 9 (September 2001): 941–46. http://dx.doi.org/10.1094/pdis.2001.85.9.941.

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Cylindrocladium pauciramosum is well established in South America, and has recently been collected from nurseries in South Africa, Italy, and the United States. Isolates were compared with respect to the percentages of hermaphrodites and the respective mating types in the different samples. Based on these data, the effective population size could be determined for the different areas studied. All nurseries had mating type ratios significantly different from an idealized 1:1 ratio. In the South African nursery, the MAT-1 mating type was dominant, while the MAT-2 mating type dominated in other s

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Masters, David G., Serina Hancock, Gordon Refshauge, Susan Robertson, Marie Bhanugopan, Michael Friend, and Andrew N. Thompson. "Mineral status of reproducing ewes grazing vegetative cereal crops." Animal Production Science 58, no. 11 (2018): 2049. http://dx.doi.org/10.1071/an16530.

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Grazing vegetative wheat, barley and oats (both dual-purpose and traditional spring varieties) is becoming an important strategic and tactical grazing option on farms where crops and livestock co-exist. The high winter growth rates of the crops offer an opportunity to fill the winter feed gap and the high nutritive value (metabolisable energy and crude protein) makes them well suited to meet the requirements of reproducing ewes. However, metabolic disorders have been reported and many producers avoid grazing these crops with reproducing ewes because of the risk. The present study aimed to esta

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Unkovich, Murray, Therese McBeath, Rick Llewellyn, James Hall, Vadakattu VSR Gupta, and Lynne M. Macdonald. "Challenges and opportunities for grain farming on sandy soils of semi-arid south and south-eastern Australia." Soil Research 58, no. 4 (2020): 323. http://dx.doi.org/10.1071/sr19161.

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Sandy soils make up a substantial fraction of cropping land in low rainfall (&lt;450 mm p.a.) south and south-eastern Australia. In this paper we review the possible soil constraints to increased production on these soils in this region. Many of these soils have a very low (&lt;3%) clay content and suffer from severe water repellency, making crop establishment and weed control problematic. Crops which do emerge are faced with uneven soil wetting and poor access to nutrients, with crop nutrition constraints exacerbated by low fertility (soil organic matter &lt; 1%) and low cation ex

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Ho, C. K. M., T. Jackson, M. T. Harrison, and R. J. Eckard. "Increasing ewe genetic fecundity improves whole-farm production and reduces greenhouse gas emissions intensities: 2. Economic performance." Animal Production Science 54, no. 9 (2014): 1248. http://dx.doi.org/10.1071/an14309.

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Ewes with the fecundity Booroola (FecB) gene produce more lambs per ewe on average than ewes without the gene and offers a potential way to decrease greenhouse gas emissions (net and per unit animal product) without reducing lamb production if the lambs can be reared to market weights. Using a case study farm in south-west Victoria, a biophysical modelling study has previously showed that increased ewe fecundity from 1 to 1.5 lambs per ewe increased production by 27% and reduced net farm emissions by 21% for the same long-term stocking rate. In this study, a whole-farm economic analysis was us

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Nash, David, Craig Butler, Justine Cody, Michael St J. Warne, Mike J. McLaughlin, Dianne Heemsbergen, Kris Broos, et al. "Effects of Biosolids Application on Pasture and Grape Vines in South-Eastern Australia." Applied and Environmental Soil Science 2011 (2011): 1–11. http://dx.doi.org/10.1155/2011/342916.

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Biosolids were applied to a pasture and a vineyard in south-eastern Australia. At both sites, soil Cd, Cu, and Zn concentrations linearly increased with biosolids application rates although not to the extent of exceeding soil quality guidelines. Biosolids marginally increased soil C and N concentrations at the pasture site but significantly increased P concentrations. With lower overall soil fertility at the vineyard, biosolids increased C, N, and P concentrations. At neither site did biosolids application affect soil microbial endpoints. Biosolids increased pasture production compared to the

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Abigail, Wendy F., Charmaine Power, and Ingrid Belan. "Termination of pregnancy and the over 30s: what are trends in contraception use 1996 - 2006?" Australian Journal of Primary Health 16, no. 2 (2010): 141. http://dx.doi.org/10.1071/py09020.

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There is a shift in fertility patterns with more women commencing childbearing over 30 years of age. Little is known about trends in contraception use by women in this age group seeking a termination of pregnancy. This research presents a trend analysis to determine if there were significant changes in trends in contraception use pre- and post-termination of pregnancy for women over 30 years of age from 1996 to 2006 in South Australia. Data were collected from 1996 to 2006 from a service in South Australia. Data were examined using simple linear regression. At the time of conception, 53% of wo

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Spencer, Christopher J., Christopher L. Kirkland, and Nicholas M. W. Roberts. "Implications of erosion and bedrock composition on zircon fertility: Examples from South America and Western Australia." Terra Nova 30, no. 4 (May 15, 2018): 289–95. http://dx.doi.org/10.1111/ter.12338.

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Young, J. M., G. Saul, R. Behrendt, F. Byrne, M. McCaskill, G. A. Kearney, and A. N. Thompson. "The economic benefits of providing shelter to reduce the mortality of twin lambs in south-western Victoria." Animal Production Science 54, no. 6 (2014): 773. http://dx.doi.org/10.1071/an13256.

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Achieving higher lamb weaning percentages by reducing lamb mortality can improve the profitability of sheep enterprises. In this paper we estimated the financial benefits from providing shelter to reduce the mortality of twin lambs in self-replacing Merino or dual-purpose Merino flock enterprises in south-west Victoria. A whole-farm bio-economic model (MIDAS) was initially used to estimate the increase in profit from reducing mortality of twin lambs and a second analysis included the costs of using perennial grass hedges to provide the shelter during lambing. The economic value of providing sh

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Waller, R. A., P. W. G. Sale, G. R. Saul, and G. A. Kearney. "Tactical versus continuous stocking in perennial ryegrass-subterranean clover pastures grazed by sheep in south-western Victoria. 3. Herbage nutritive characteristics and animal production." Australian Journal of Experimental Agriculture 41, no. 8 (2001): 1121. http://dx.doi.org/10.1071/ea01019.

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A 4-year grazing experiment was carried out in south-western Victoria to compare the effect of tactical stocking with continuous stocking on the persistence of perennial ryegrass (Lolium perenne L.) and the productivity of sheep used for prime lamb production. Tactical stocking consisted of variable length summer, autumn and winter rotations and continuous stocking in spring. The 2 grazing strategies were compared on 2 contrasting pastures: an upgraded pasture, sown with newer cultivars of perennial ryegrass and subterranean clover (Trifolium subterraneum L.) with 26 kg phosphorus/ha.year, and

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Clark, S. G., E. A. Austen, T. Prance, and P. D. Ball. "Climate variability effects on simulated pasture and animal production in the perennial pasture zone of south-eastern Australia.1. Between year variability in pasture and animal production." Australian Journal of Experimental Agriculture 43, no. 10 (2003): 1211. http://dx.doi.org/10.1071/ea02101.

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Climate variability is a major constraint to farming in south-eastern Australia and one that is out of the farmers' control. However, a better understanding of long-term climate variability would be beneficial for on-farm management decisions. A series of long-term simulations were undertaken with the GrassGro decision support tool to determine the effect of climate variability on pasture and animal production at 6 locations in south-eastern Australia. The simulations ran from 89 to 119 years using daily weather records from each location. All simulations were for spring-lambing flocks of medi

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Duka, Toni, and Pip Masters. "Confronting a tough issue: Fertility control and translocation for over-abundant Koalas on Kangaroo Island, South Australia." Ecological Management and Restoration 6, no. 3 (December 2005): 172–81. http://dx.doi.org/10.1111/j.1442-8903.2005.00234.x.

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Laurence, M., N. Stephens, and G. Megirian. "Animal and human health is unlikely to be at risk when generations of sheep graze bauxite residue (Alkaloam®)-amended pastures." Animal Production Science 56, no. 12 (2016): 2074. http://dx.doi.org/10.1071/an14913.

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Bauxite residue (Alkaloam®) applied to pasture has been shown significantly to improve pasture production on sub-fertile soil, such as those found in south-west Western Australia, because it increases soil pH. There are concerns that animals grazing Alkaloam-amended pasture may suffer ill health through heavy metal accumulation in tissues, and that this effect could be amplified over generations. There are additional concerns that eating exposed animals, or direct exposure to Alkaloam, may be detrimental to human health. Although some literature exists there are no studies that address these i

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