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Letteratura scientifica selezionata sul tema "Crossbred doe"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 9 febbraio 2022

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Articoli di riviste sul tema "Crossbred doe"

Prayaga, K. C., e S. J. Eady. "Performance of purebred and crossbred rabbits in Australia: doe reproductive and pre-weaning litter traits". Australian Journal of Agricultural Research 53, n. 9 (2002): 993. http://dx.doi.org/10.1071/ar02002.

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Data from a rabbit breeding experiment were analysed to compare the doe reproductive and pre-weaning litter performance of 3 breeds of rabbits, namely New Zealand White (N), Californian (C), and Flemish Giant (F), and their crosses CN (C × N) and FN (F × N). The foundation stock of 152 rabbits was collected from 26 different sources in New South Wales, Australia. Data on reproductive traits, doe age at first successful mating (DA), doe weight at first successful mating (DW) arising from 104 does, conception rate (CR) from 808 matings, and kindling interval (KI) from 325 records of 119 does were analysed. Overall means for reproductive traits DA, DW, CR, and KI were 21 weeks, 3.6 kg, 0.75, and 7.4 weeks, respectively. DA, CR, and KI did not differ significantly among different breeds and their crosses. DW of C does was found to be significantly lighter than all other breed crosses in the study. Month–year of mating significantly affected DA, DW, and CR (P < 0.01), and as the parity number increased, there was a significant (P < 0.01) decrease in KI. As age of the doe at mating increased there was a significant increase in DW (P < 0.01), CR (P < 0.05), and KI (P < 0.01). Data from 436 litters of 157 does were included in the analysis of pre-weaning litter traits. The overall means for the pre-weaning litter traits were: number born per litter (NB, 8.1), number born alive per litter (NBA, 6.9), number weaned per litter (NW, 3.3), total litter birth weight (TLBW, 453.7 g), live litter birth weight (LLBW, 397.1 g), litter weaning weight (LWW, 2.8 kg), and average birth weight of kits per litter (ABW, 58.1 g). Doe breed significantly affected NW (P < 0.05), TLBW (P <�0.01), LLBW (P < 0.05), LWW, and ABW (P < 0.01). N does and crossbred does (CN and FN) performed better than purebred F and C does for NW and LWW. A significant heterosis of 41.9% and 40.8% was observed in CN does for traits NW and LWW, respectively. ABW of F does was significantly higher than that of all other breed crosses in the study. Buck breed did not have any significant effect on any of the pre-weaning litter traits under study. Parity significantly affected NW (P < 0.05), TLBW (P < 0.01), LLBW (P < 0.05), and ABW (P < 0.01). First parity does produced litters with significantly lighter birth weights. The month–year of birth effect was significant for NW, LWW (P < 0.01), and ABW (P < 0.05).�The coefficients of variation for the doe reproductive traits and pre-weaning litter traits ranged between 12.1 and 59.5% and 16.1 and 93.3%, respectively. High phenotypic variances and coefficients of variation observed for traits NW and LWW indicate that good response could be realised through selection. Repeatability estimates for reproductive traits CR and KI were very low. Low to moderate repeatability estimates in the range 0.17–0.25 were observed for pre-weaning litter traits. Significant positive phenotypic correlations were observed between litter size and litter weight traits (0.30–0.97). A significant negative correlation was observed between ABW and NB (–0.56) and NBA (–0.36).

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Iyeghe-Erakpotobor, G. T., E. O. Oyedipe, L. O. Eduvie e D. Ogwu. "Effect of rebreeding interval on reproductive performance and body weight changes of does during pregnancy". Nigerian Journal of Animal Production 32, n. 1 (1 gennaio 2021): 142–52. http://dx.doi.org/10.51791/njap.v32i1.1070.

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The effect of rebreeding interval on the reproductive performance and body weight changes of does during pregnancy was investigated using 24 multiparous crossbred (New Zealand White X California) does. The does were placed on three treatments comprising mating at 14, 21 and 28 days postpartum. The docs were served 250g-concentrate meal (23% CP und 2600 kcal ME/kg) daily, while water was given ad libitum. Parameters monitored were doe willingness to mate, doe weights during pregnancy, feed intake, pregnancy rate, litter size and weight at birth, alive at birth and up to 21 days postpartum and stillbirth rate. Kits were weaned at 4 weeks of age. Results obtained showed that does mated 14 days postpartum lost more weight in the second week of pregnancy than the other groups. Rebreeding interval did not significantly (P>0.05) affect doe weight gain in the 19, 3" and 4th weeks of pregnancy. Does mated 14-d postpartum had significantly (P<0.05) higher feed intake during the l", 2nd and 3rd weeks of pregnancy. Feed:guin ratio was higher for does mated 21 d postpartum than for other treatments. Pregnancy rate was higher in the 14-d group and lowest in the 28-d group. Willingness to mate also decreased with increasing rebreeding interval. Litter size at birth, number of kits alive at birth and up to 28 days postpartum were not affected (P>0.05) by rebreeding interval as was the case for litter birth weight and percent stillbirths. Does mated 14 days postpartum however, had numerically more kits alive at birth and up to 28 days postpartum than the other groups. Litter weights were slightly higher for does mated 14 and 21 days postpartum than 28 days. It is concluded from this study that mating does 14 days postpartum under tropical conditions could increase the number of kits weaned per doe and hence increase profitability of the rabbit production enterprise.

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Herold, P., H. Snell e E. S. Tawfik. "Growth, carcass and meat quality parameters of purebred and crossbred goat kids in extensive pasture". Archives Animal Breeding 50, n. 2 (10 ottobre 2007): 186–96. http://dx.doi.org/10.5194/aab-50-186-2007.

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Abstract. Goats are more and more used as shrub-fighters in landscape conservation. Important traits for the extensive production system are vitality and robustness but also acceptable meat production of kids during the grazing period. To investigate possible selection traits for "landscape conservation suitability", 35 kids were investigated for vitality parameters directly after birth whereas all-in 65 kids were investigated for performance traits under extensive grazing conditions. Birth weight as a parameter for vitality and survivability of kids was significantly influenced by sex, genotype and age of doe. Besides rectal temperature 3 hours p.p., other factors regarded as possible vitality parameters were not influenced by birth weight. Birth weight had a significant influence on daily weight gain during the extensive period; kids with higher birth weight showed slightly better weight gain. Birth weight had also a significant effect on some carcass parts, indicating that higher birth weight implies a high probability of a better carcass performance especially in some valuable parts. Still, the effect of the genotype on carcass performance was considerably higher than any other investigated effect. As a result of the present study, there are indications that birth weight can be taken as a parameter for kids' vitality. Also, it is indicated that goats of Cashmere type as fibre animals are not appropriate for landscape management whereas crossbred animals with a meat, dairy and fibre component in their genotype showed to be a vital animal with acceptable efficiency also in harsh conditions and with an average meat and carcass performance.

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EL-DARAWANY, Abdel-Halim Ali, Ibrahim Fayez Mahmud MARAI, Kamal Mohamed ELWAN e Akram Abdel-Sattar EL-TARABANY. "Mucus and hormonal traits in three gestation patterns (pre-, full- and post-term) of Egyptian Nubian (Zaraibi) crossbred doe goats". Animal Science Journal 76, n. 6 (dicembre 2005): 541–47. http://dx.doi.org/10.1111/j.1740-0929.2005.00302.x.

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Brahmantiyo, Bram, Yono C. Raharjo e L. H. Prasetyo. "Production performance of HyCole, New Zealand White Rabbits and its reciprocal". Jurnal Ilmu Ternak dan Veteriner 22, n. 1 (1 marzo 2018): 16. http://dx.doi.org/10.14334/jitv.v22i1.1590.

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New Zealand White rabbits (NZW) has been known as broiler rabbit that has been well adapted in Indonesia. HyCole rabbits were imported from France that were selected for high reproduction and growth rate. This study was aimed to evaluate the productivity of HyCole and New Zealand White rabbits and their reciprocal as the basis to develop broiler rabbit which adaptive to tropical climate. Forty heads of doe (PBPB) and 17 heads of buck (PAPA) of HyCole rabbit, and 30 heads of doe and 6 heads of buck of New Zealand White rabbits (NN) were used. The ration was given according to IRIAP standard ration (18 % CP, 2500 kcal ME/kg and 14 % CF). The diet was provided in the morning and the evening, and drinking water was provided ad libitum. Reproductive performance of does (litter size at birth, litter size at wean, mortality and weekly does body weight) and the kit’s growth performance (weekly body weight from weaning until the age of 20 weeks) were evaluated. Data were analyzed using the SAS program (SAS 2001). Rabbits growth data were periodically analyzed by Gompertz model (Blasco & Gomez 1993). HyCole rabbit which was bred in Indonesia had production performance better than NZW rabbit and PAN crossbred (HyCole bucks x NZW does) had the potential to be bred as superior rabbit adaptive to tropical climate because they had hybrid vigor of the number of litter size at birth and kit’s growth rate.

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Tsavkar, D. T., M. Y. Latu, D. T. Tsavkar, A. K. Olutunmogun, P. P. Barje e G. T. Iyeghe- Erakpotobor. "Energy partitioning of pregnant and lactating rabbit fed combination of concentrate and stylosanthes hamata hay". Nigerian Journal of Animal Production 46, n. 1 (28 dicembre 2020): 94–100. http://dx.doi.org/10.51791/njap.v46i1.1320.

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The study was carried out to examine energy partitioning of pregnant and lactating rabbit offered levels of concentrate and Stylosanthes hamata hay to ascertain whether it meets their high reproductive and nutritional requirement. Forty-eight nulliparous crossbred does (New Zealand White x California and California x Chinchilla breeds) of eight months old were allocated to four dietary treatments in a completely randomised design. During gestation, 150 g/doe/day concentrate and Stylosanthes hamata hay combinations (30:120g, 60:90g, 90:60g and 120:30g) was offered while 350 g/doe/day concentrate and Stylosanthes hamata hay combinations (70:280g, 140:210g, 210:140g and 280:70g) was offered during lactation. Estimations of digestible energy during pregnancy and lactation were carried out and reference data were used to calculate forDE DE DE DE BalanceDE and DE /LW0.75. req, m, fg, macc, req Results obtained showed non-significant (P>0.05) difference among 90:60 and 120:30% concentrate and Stylosanthes hamata hay combinations in terms of DM DE DE DE intake, intake, req, fg, DE BalanceDE and DE /LW0.75, but were significantly (P<0.05) higher than 30:120 and macc, req 60:90% concentrate and Stylosanthes hamata hay combinations. Rabbit in the 4th week of pregnancy had significantly (P<0.05) higher DE DE DE DE BalanceDE and intake, req, fg, macc, DE /LW0.75 than does in the 2nd week of pregnancy. During lactation, all parameters showed req non-significant (P>0.05) difference. Therefore, the diet combinations were sufficient to provide adequate digestible energy for the physiological needs of does during pregnancy and lactation.

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Saha, BK, MB Sarker, MH Alam, ME Kabir, MR Amin e M. Moniruzzaman. "Effect of re-mating intervals on growth and reproductive performance of rabbits". Bangladesh Journal of Animal Science 42, n. 2 (31 dicembre 2013): 143–47. http://dx.doi.org/10.3329/bjas.v42i2.18497.

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The aim of this study was to know the effects of postpartum re-mating intervals on reproductive performances of does and growth of kits. Fifteen female New Zealand White crossbred rabbits were divided into three groups of equal numbers. They were re-mated within 24 hours, at 10 days and 28 days postpartum. Animals were individually caged in cells measuring 2'×2'×2'. Does were kept under natural lighting. Plastic nest boxes were supplied to does 3-4 days before parturition. They were reared up to four generation. Litter weight at birth was significantly (p<0.05) higher at 10 days postpartum than within 24 hours and at 28 days postpartum intervals. Higher growth rate was observed in 10 days postpartum group comparing to other re-mating groups. Milk yield of the dams were significantly (p<0.05) higher when dam re-mated at 10 days postpartum than those re-mated within 24 hours after parturition. Conception rate, gestation length of does, litter size at birth and weaning, litter weight at weaning, doe weight at mating, kidding, weaning and kid mortality did not differ significantly among the groups. Rabbit does re-mated at 10 days postpartum show maximum litter weight at birth, growth rate of kits and milk yield of dam.DOI: http://dx.doi.org/10.3329/bjas.v42i2.18497 Bang. J. Anim. Sci. 2013. 42 (2): 143-147

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Martínez-Bas, Ana María, Mathieu Kessler e Eva Armero. "Relative growth in rabbits: the effects of genetic line, diet and gender". World Rabbit Science 26, n. 3 (28 settembre 2018): 201. http://dx.doi.org/10.4995/wrs.2018.7435.

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The relative growth of different parts of the body and tissues was analysed using an allometric model. Animals were crossbred rabbits (males and females) from the mating of commercial lines HYLA-grand parental doe (HY-GPD) female with HYLA Coloured (HY-CO) or Grimaud (GR) males, both selected for the growth rate, or HY-GPD males, selected for weaning weight. They were fed on two different diet, mainly differing in their energy content, and the relative growth of the different parts of their body was assessed. The components with a nearly isometric growth pattern, which grew at the same mean rate as the rest of the body, were skin, chilled carcass and reference carcass; hind legs for retail cuts; and dorsal and carcass length for linear measurements. All allometric coefficients were calculated with respect to the slaughter weight, except percentage of hind leg inter-intramuscular fat (IIMF), which was calculated with respect to the weight of the hind leg. The components that showed early maturing were liver, kidneys, breast and rib viscera for offal and organs; head and breast and ribs for retail cuts; and bone and IIMF percentage of the hind leg. The components with late maturing were forelegs and loin for retail cuts, inguinal, scapular and perirenal fat, meat of the hind leg, and thigh and lumbar circumference length for carcass linear measurements. The GR line showed earlier growth for loin than the maternal HY-GPD line. In addition, the GR and HY-CO lines developed scapular and inguinal fat later than the HY-GPD line. For IIMF percentage, GR presented later growth than HY-CO and HY-GPD. The main effect of the diet was on liver development and on scapular fat: rabbits fed on the high-energy diet showed later liver and scapular fat growth.

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Iyeghe-Erakpotobor, G. T., A. A. Sekoni e L. O. Esievo. "Nutrient Intake and digestibility of Rabbit does fed varying levels of concentrate and lablab during pregnancy". Nigerian Journal of Animal Production 36, n. 2 (29 dicembre 2020): 275–87. http://dx.doi.org/10.51791/njap.v36i2.1381.

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Nulliparous crossbred does were used to study the effects of concentrate:lablab ratio (CL) and stage of pregnancy on nutrient intake and digestibility. Treatments consisted of four concentrate and lablab combinations on a gram:gram basis: 20:130, 40: 110, 80:70 and 100:50 and two stages of pregnancy: second and fourth week of pregnancy Concentrate intake increased as level increased up to 80g/day offered while lablab intake increased from 50 to 130g/day offered. Doe weight and metabolic size were similar for all treatments. Total feed intake was not affected by concentrate and lablab levels. Dry matter intake was lower for 100:50 CL than other treatments. Ether extract and crude fibre intakes decreased with increase in concentrate levels. Dry matter and nitrogen free extract digestibility were higher for 80:70 CL than other combinations. Crude fibre digestibility was higher for 80:70 than 40:110 and 100:50 CL Crude protein retention was higher for 80:70 than 20:130 and 100:50 CL. Fetal growth requirement, total protein requirement and balance of protein were high at 80:70 and 100:50 CL. During pregnancy, dry matter and all nutrients intake were higher in the second than fourth week. Ether extract, crude protein and nitrogen free extract digestibilities were lower in the second than fourth week of pregnancy. Fetal growth requirement and balance of protein were higher in the second than fourth week of pregnancy relationship between feed intake (g DM/day) and nutrient digestibility was negative. The relationship between feed intake (g DM/kg body weight/day) and feed intake (g DM/kg LW0.75/day) was however, positive for all the nutrients except crude protein. For the small scale rabbit producer in developing countries, it is feasible to maintain rabbits on combinations of concentrate and lablab during pregnancy

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Khaira Nova, dan Syahrio Tantalo, Ramdan Febrianto, Rudy Sutrisna,. "PEMBERIAN RANSUM DENGAN DOSIS HERBAL YANG BERBEDA TERHADAP SUSUT TETAS, MORTALITAS EMBRIO, DAN DAYA HIDUP DOC AYAM PERSILANGAN". Jurnal Riset dan Inovasi Peternakan (Journal of Research and Innovation of Animals) 4, n. 1 (1 aprile 2020): 7–13. http://dx.doi.org/10.23960/jrip.2020.4.1.7-13.

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This study aimed to determine the effect of giving ration with different herbal doses on the hatching shrinkage, embryo mortality, and DOC viability of crossbred chickens, and also to know the best dosage of herbal in the ration on the parameters. This research was conducted in October 2018 in the poultry house of Integrated Field Laboratory, Faculty of Agriculture, University of Lampung. The chickens used were 20 females and 4 males of crossbreed chickens between male Lohman brown and female kampong (3/4 Lohman brown + 1/4 kampong) in laying phase (aged 51 weeks). The treatment given were ration with different doses, namely without herbs (H0), 1 g/1 kg (H1), 2 g/1 kg (H2), and 3 g/1 kg (H3). Hatched shrinkage data were analyzed using variance analysis at 5% significance level and continued with the Least Significant Difference test. Data on embryo mortality and DOC viability obtained were tabulated and analyzed descriptively. The results showed that the lowest average value of hatching shrinkage was found in ration with herbal 1 g/kg, and the highest value of embryo mortality and the lowest DOC viability was found in ration treatment without herbs. Keywords: Rations, Hatching shrinkage, Embryo mortality, DOC viability, Crossbred chicken

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Più fonti

Tesi sul tema "Crossbred doe"

Ngwekhulu, Livhuwani. "Fiber growth of goats as influenced by the doe's genotype, plane of nutrition and physiological stage (gestation and lactation)". Diss., 2003. http://hdl.handle.net/2263/27373.

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The full text of this thesis/dissertation is not available online. Please contact us if you need access. Read the abstract in the section 00front of this document.
Dissertation (M Inst Agrar (Animal Production))--University of Pretoria, 2006.
Animal and Wildlife Sciences
unrestricted

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Libri sul tema "Crossbred doe"

Coile, Caroline. Designer Dogs: Portraits and Profiles of Popular New Crossbreeds. Gold Street Press, 2007.

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Court, Jane, Sue Hides e John Webb-Ware, a cura di. Sheep Farming for Meat and Wool. CSIRO Publishing, 2010. http://dx.doi.org/10.1071/9780643101333.

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Sheep Farming for Meat and Wool contains practical, up-to-date information on sheep production and management for producers throughout temperate Australia. It is based on research and extension projects conducted over many years by the Department of Primary Industries and its predecessors and the University of Melbourne. The book covers business management, pasture growth and management, nutrition and feed management, drought management, reproductive management, disease management, genetic improvement, animal welfare and working dog health. It also gives seasonal reminders for a spring lambing wool-producing flock, for autumn lambing Merino ewes joined to Border Leicester rams, and for winter lambing crossbred ewes joined to terminal sires. It will guide new and established farmers, students of agriculture and service providers with detailed information on the why and how of sheep production, and will assist farmer groups to initiate activities aimed at increasing their efficiency in specific areas of sheep production.

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Moran, John. Rearing Young Stock on Tropical Dairy Farms in Asia. CSIRO Publishing, 2012. http://dx.doi.org/10.1071/9780643107915.

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Rearing young stock for replacement heifers is probably one of the least well understood and practised aspects of herd and feeding management on dairy farms throughout the world, particularly on small holder dairy farms in the tropics. This book addresses all the major concerns of the small holder dairy farmer in Asia. It shows how to attain optimal growth in young stock, so that as cows, they can calve at an appropriate early age at the lowest cost and promptly substitute for any cows culled from the milking herd. This provides continuing returns on the investments of feed, labour and other farm resources. Low reproductive rates and high calf mortality are the major causes of reproductive wastage. This has a direct bearing on culling and replacement strategies and on genetic improvement. In many tropical countries, calf mortality can be as high as 50%. In some areas this can be due to climatic stress on temperate or crossbred stock. While climatic stress compounds the other hazards of calf life, high calf mortality is usually due to diseases and poor feeding management. Rearing Young Stock on Tropical Dairy Farms in Asia encourages the small holder dairy farmer to maintain their investment in replacement heifers and gives them the tools necessary to achieve realistic targets for mortalities, live weight gain, mating age, and age and live weight at first calving. It is a companion volume to three previous manuals written by John Moran: Tropical Dairy Farming, Business Management for Tropical Dairy Farmers and Managing High Grade Dairy Cows in the Tropics.

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Capitoli di libri sul tema "Crossbred doe"

Foreman, Max, Roberta Rasotto e Salih Eminaga. "Lumbar Nephroblastoma in a Young Crossbreed Dog". In BSAVA Congress 2021: Clinical abstract presentations. British Small Animal Veterinary Association, 2021. http://dx.doi.org/10.22233/9781913859039.24.

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Valadares Filho, Sebastião de Campos, Luiz Fernando Costa e. Silva, Mateus Pies Gionbelli, Polyana Pizzi Rotta, Marcos Inácio Marcondes, Mário Luiz Chizzotti e Laura Franco Prados. "Nutrient Requirements of Zebu and Crossbred Cattle - BR-CORTE". In Exigências Nutricionais de Zebuínos Puros e Cruzados - BR-CORTE. Editora Federal de Viçosa, 2016. http://dx.doi.org/10.5935/978-85-8179-111-1.2016b002.

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Baldassini, Welder Angelo, Mateus S. Ferreira, Otávio Rodrigues Machado Neto, Talita Tanaka Fernandes, Rogério A. Curi, Guilherme Luis Pereira, Bianca Torin e Luis Artur Loyola Chardulo. "CORRELATIONS OF CARCASS AND MEAT QUALITY TRAITS IN CROSSBRED AND PURE BULLS FEEDLOT FINISHED THROUGH MULTIVARIATE APPROACH". In Bovinocultura: Ferramentas do Melhoramento Genético em Prol da Bovinocultura, 35–46. Editora Científica Digital, 2021. http://dx.doi.org/10.37885/210203141.

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Atti di convegni sul tema "Crossbred doe"

Brosilovski, Yael. "Crossbreed – (Re) producing the Future". In International Conference on the 4th Game Set and Match (GSM4Q-2019). Qatar University Press, 2019. http://dx.doi.org/10.29117/gsm4q.2019.0017.

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The subject of technological intervention has been largely debated among the world’s greatest minds. Political, theological, psychological, biological and ethical implications have all been argued for and against the ‘technological other’. Does the fact we now CAN perform certain operations and changes to the human body and society at large actually mean we SHOULD? What impact can we foresee with unlimited human intervention in nature ‘as it was intended’? How can we benefit from an era of information flow, where crossing and hybridizing-disciplines, or as I term it “crossbreeding”, become the new breeding ground for innovation? How would Architecture be affected by a future that belongs to organic, non-organic humans and anything in between? This paper will discuss these issues and take a peep into where we might be headed in the near future, so to better understand the challenges that are ahead of us.

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Praharani, Lisa, Supriyati Supriyati e Rantan Krisnan. "A Preliminary Study on Some Reproductive Traits and Heterosis Effects of Anglo Nubian and Etawah Grade Crossbred Does". In Proceedings of International Seminar on Livestock Production and Veterinary Technology. Indonesian Center for Animal Research and Development (ICARD), 2016. http://dx.doi.org/10.14334/proc.intsem.lpvt-2016-p.252-260.

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Camilleri, Duncan, Donald Mackenzie e Robert Hamilton. "Shakedown of a Thick Cylinder With a Radial Crosshole". In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93302.

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The shakedown behaviour of a thin cylinder subject to constant pressure and cyclic thermal loading is described by the well known Bree diagram. In this paper, the shakedown and ratchetting behaviour of a thin cylinder, a thick cylinder and a thick cylinder with a radial crosshole is investigated by inelastic finite element analysis. Load interaction diagrams identifying regions of elastic shakedown, plastic shakedown and ratchetting are presented. The interaction diagrams for the plain cylinders are shown to be similar to the Bree Diagram. Incorporating the radial crossbore in the thick cylinder significantly reduces the plastic shakedown boundary on the interaction diagram but does not significantly affect the ratchet boundary. The radial crosshole can therefore be regarded as a local structural discontinuity and neglected when determining the maximum shakedown or (primary plus secondary stress) load in Design by Analysis.

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