Reproduction in Domestic Animals - Facultad de Ciencias Veterinarias

More documents

Recommendations

Info

$(Microsoft PowerPoint - Lecci\363n 2_07.ppt)$

16 t h International Congress on Animal Reproduction 218 Poster Abstracts southwest of China. Gayal has a calving behavior that the cows are out of the herd lonely when calving. The special calving behavior has not been covered so far. The objective of this study was, through the investigation of calving behavior of to collect relevant information on ethology, which, hopefully, would benefit in protecting the herds in immigration and feeding management whenever making the most of gayal scientifically. The study was carried out on the Mithun conservation farm of Phenix mountain at Lushui county in Yunnan province (98°59′--99°03′E, 25°58′--26°04′N, an altitude of 2700-- 3200m)from June 1 st to 21 st , 2007, by observing three gayal cows being about to delivery(two of multiparous, one of primiparous, average age of 9.0±5.6) and one adult bull(age of 3.5 years old) under free grazing on two hectare fenced improved pasture consisting of Dactylis glomerata, Trifolium repense and free grazing on the sward of native grasses with the same management. Average temperature and relative humidity recorded during the experiment were 16.85±1.01 and 74.27±4.54%, respectively to an elevation of 2420m. Relative behavior was recorded with digital vidicon and camera on Day 3 before the parturition, and monitored gayal cow with full track at daylight and at every 2h interval for 30 min at night. The results were shown that gayal behaved out a series of preparative behavior before the delivery, namely calving behavior were expressed as: 60% cows would leave the herd to look for food and proper delivering place alone from 10 to 3 days before calving, preventing milk sucking from the previous calves with more watchful walking from 24 to 12hours before calving. Impatience and mounting behavior (including mounting on gayal bull) of the cows were observed from 8 to 1 hour before calving. In a few hours before calving, Gayal cows performed strongly the behavior of signory, rudely chasing the other animals. Rather flat sward on the higher place with lower gradient was naturally selected by cows as parturition site, where the tall grass in 4~6m 2 was cleaned up by the cows to provide a convenient and safe parturition area for calves. Calving was from 7 o’clock in the morning to 6 o’clock in the afternoon, tending towards a sort of daylight delivering system. Activity of calving took 63.33±101.16min after chasing other animal and lying on the ground for calving, 25.00±5.00min. From calf born to placenta expelled, it took 11.74±10.89h. The number of getting up and lying down of cows were 7.00±6.00 times during the delivery course. Average birthweight was 17.83±1.04kg for male and female without any dystocia case. Activity time of new calf: From birth to the first standing, it took 52.70±29.69min; from the first standing to the first milk sucking, 38.7±29.14min and from the first milk sucking to walking around, 61.33±1.53 min. The study indicated that calving performance of gayal was orderly processed with hardly undystocia case, good maternity, better ability of rearing calf, and the best capability of reproduction and survival in the wild condition. Keywords System of Semi-intensive management; Mithun(Bos frontalis); calving behavior; investigation. P577 Treatment of postpartum dairy cows ‘not-detected in oestrus’ with gonadotrophin releasing hormone, prostaglandin and progesterone McDougall, S Animal Health Centre, New Zealand Oestradiol benzoate (ODB) has been extensively used in synchrony programmes in dairy cattle to manage follicle wave emergence and timing of oestrus. However, ODB has recently been banned by the European Union and hence removed from other markets. Thus alternate protocols to synchronise cows are required. The objective of this study was to assess the efficacy of 3 treatments of dairy cows ‘not detected in oestrus’ before the start of seasonal breeding programme (PSM). The ovaries of 2222 cows not detected in oestrus by 9 days before the PSM were examined using ultrasonography and randomly assigned to be treated with: 1. Gonadotrophin releasing hormone (GnRH), prostaglandin F2a and GnRH at 7 and 2-day intervals, respectively; with fixed time artificial insemination 1 day after the second GnRH treatment (‘GPG’ programme), 2. ‘GPG’ and insertion of an intravaginal progesterone-releasing device between the first GnRH injection and the PG, with fixed time artificial insemination 1 day after the second GnRH treatmen (GPG + P4) , 3. As for 2, but with oestrus detection for 3 days after the PG treatment, and with the second GnRH treatment occurring only where oestrus has not been detected by 3 days after PG (GPG + P4 + heat), or 4. No treatment (Control). Pregnancy status was assessed using ultrasonography at 35 days after the PSM. Data were analysed using logistic regression models which included treatment group, age, herd, CL status (presence or absence) and days from calving to the PSM. Estimated marginal means (95% CI) were calculated and the multiple comparisons among treatment groups accounted for by using the Bonferroni adjustment. The conception rate to service within the first 7 days was higher in the treatment groups which included progesterone than in the control or GPG groups (0.43 (0.36-0.50), 0.56 (0.49-0.63), 0.48 (0.41-0.55), 0.34 (0.23-0.44) for the GPG, GPG+P4, GPG+P4+heat and Control groups, respectively; p = 0.48, 0.001, and 0.04 compared to the Control group). Additionally, the pregnancy rate (i.e. total number of cows confirmed pregnant/total number of cows treated) varied among groups (0.40 (0.34-0.47), 0.54 (0.47-0.60), 0.46 (0.40-0.54), 0.08 (0.05-0.11) for the GPG, GPG+P4, GPG+P4+heat and Control groups, respectively. The control was lower than all other groups (p
16 t h International Congress on Animal Reproduction Poster Abstracts 219 incidence of subclinical hypocalcaemia varies between 5% and 10% of all dairy cows, it could be a safe of money. P579 Boar sperm quality after addition of pentoxifylline to short-term extender Yeste, M*; Briz, M; Pinart, E; Sancho, S; Bussalleu, E; Casas, I; Fàbrega, A; Puigmulé, M; Garcia-Bonavila, E; Bonet, S Biotechnology of Animal and Human Reproduction, Department of Biology, University of Girona Pentoxifylline has been used in humans to improve sperm motility in low motility ejaculates and for inducing an early onset of sperm capacitation. The aim of the present study was to assess sperm viability, motility, morphology and capacitation after adding five different concentrations of pentoxifylline (Ptx): 0.25, 0.5, 1, 2 and 4 mM to semen diluted in Beltsville thawing solution (BTS) over twoday of storage at 15ºC. Semen samples were obtained from 21 healthy Piétrain post-pubertal boars and sperm parameters were determined before (control) and after applying the five treatments. Sperm viability was assessed using a multiple fluorochrome staining procedure, sperm motility and morphology by means of computer assisted sperm analysis (CASA) and the capacitation status using chlortetracycline (CTC) antibiotic staining. In each case, the various sperm parameters outlined above were assessed after incubation at 37ºC for 15 min (day 0), or after 1 or 2 days of storing at 15 ºC. Data were transformed to arcsin √x when necessary for accomplishing normality assumptions and then analysed with a repeated measures ANOVA and post-hoc Dunnet’s test. The level of significance was set at P
Page 1 and 2:
REPRODUCTION IN DOMESTIC ANIMALS 43
Page 3 and 4:
16th International Congress on Anim
Page 5 and 6:
16 t h International Congress on An
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170: 16 t h International Congress on An
Page 219: 16 t h International Congress on An
show all

Reproduction in Domestic Animals - Facultad de Ciencias Veterinarias

Create successful ePaper yourself

Delete template?

Save as template?