Squamous cell carcinoma of the pharyngeal wall in a horse     

JC TUCKEY  BJ HILBERT  S. BEETSON†  A. ADKINS† 《Australian veterinary journal》1995,72(6):227-227

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A survey of skin neoplasms in dogs from the Brisbane region     

JC ER  RH SUTTON 《Australian veterinary journal》1989,66(7):225-227

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In vitro Evaluation of the Quality and Fertilizing Capacity of Boar Semen Frozen in 0.25 ml straws     

J Peláez  E Breininger  B Alegre  FJ Peña  JC Domínguez 《Reproduction in domestic animals》2006,41(2):153-161

Twenty-two boar ejaculates were frozen in 0.25 ml straws using a controlled cooling rate, then evaluated in vitro in order to assess: (i) the extent to which a range of semen evaluation parameters accurately characterize sperm quality, (ii) the value of quality assessment in the characterization of long-term sperm survival and fertility and (iii) the suitability of the cryopreservation protocol used for yielding semen with good quality and fertilizing capacity. Motility with or without caffeine, plasma membrane integrity (PMI) evaluated with both propidium iodide (PI) and Hoechst 33258, and acrosome morphology were studied, the ejaculates being then classified into five quality groups. A thermoresistance test and a homologous in vitro fertilization test were applied to selected ejaculates of these groups. Caffeine-stimulated motility and PMI evaluated with PI provided better estimations of semen quality than the other tests of motility, PMI, or acrosome morphology, but this quality assessment could not reveal differences in fertilizing capacity or thermoresistance among ejaculates. Over 43% spermatozoa survived cryopreservation in 19 of the 22 ejaculates, with inter-boar and inter-ejaculate variability in the freezing success being observed. The fertilizing capacity, however, was seriously affected by the process regardless of the semen quality. It is concluded that caffeine-stimulated motility and PMI evaluated with PI give accurate information on sperm quality, but important aspects to the valuation of semen such as thermoresistance and fertilizing capacity are not revealed by this quality study. Moreover, the approach of selecting suitable protocols of cryopreservation does not appear to be sufficient for guaranteeing systematically good quality and fertilizing capacity in the frozen-thawed semen.  相似文献   

Effect of Cloprostenol Treatment at Artificial Insemination on Sow Fertility     

RN Kirkwood  F De Rensis  P Silva  M Gherpelli  B Alegre  JC Dominguez 《Reproduction in domestic animals》2007,42(1):26-28

In two experiments, we examined the effect of administration of cloprostenol at artificial insemination on fertility of multiparous sows. Lactation length was 21 days and only sows exhibiting estrus by 7 days after weaning were included. Cloprostenol was administered by IM injection (175 microg; n=126) or supplemented in the semen dose (525 microg; n=129). Control sows (n=130) received no hormone. In either experiment, there was no effect of any treatment on subsequent litter sizes. In experiment 1, there was no effect of treatment on farrowing rate, but in experiment 2, farrowing rate was higher (p < 0.05) in sows receiving cloprostenol by injection. Taken together, these results indicate no consistent effect of cloprostenol administration by intramuscular injection or by inclusion in the semen dose on sow fertility and so its routine use is not warranted.  相似文献   

Quantification of Sexual Steroid Hormones in Faeces of Iberian Wolf (Canis lupus signatus): A Non‐invasive Sex Typing Method     

I Barja  G Silván  S Rosellini  A Piñeiro  MJ Illera  JC Illera 《Reproduction in domestic animals》2008,43(6):701-707

The determination of gender in wild animals is essential for behavioural and ecological studies, and also for conservation. The objectives of this study were (i) the determination of gender in faecal samples of Iberian wolf based on the differential concentrations of sexual steroid hormones (SSH) and (ii) to analyse the profiles of SSH in males and females (considering the gender determination carried out previously) during the non‐reproductive and reproductive periods. The quantification of androgens (testosterone, T), progestin (progesterone, P) and oestrogen (oestradiol, E) was conducted by means of enzyme immunoassay. The k‐means conglomerate analysis showed that the 59 faecal samples grouped into three different conglomerates, considering SSH levels. Groups 1 and 2 showed higher levels of T than group 3. Therefore, the faecal samples included in groups 1 and 2 (17 samples) corresponded to males and those of group 3 (42 samples) to females. The levels of T + P + E and T/P were higher in the group of males than in the group of females. The results of this study also showed that levels of T in males were higher during the reproductive period than in the non‐reproductive period. However, the concentrations of P and E turned out to be higher during the non‐reproductive season. In females, the levels of the three hormones (T, P and E) were higher during the reproductive period.  相似文献   

Seasonality of Reproduction in Mammals: Intimate Regulatory Mechanisms and Practical Implications     

P Chemineau  D Guillaume  M Migaud  JC Thiéry  MT Pellicer-Rubio  B Malpaux 《Reproduction in domestic animals》2008,43(S2):40-47

Farm mammals generally express seasonal variations in their production traits, thus inducing changing availability of fresh derived animal products (meat, milk and cheese) or performances (horses). This is due to a more or less marked seasonal birth distribution in sheep and goats, in horses but not cattle. Birth peak occurs at the end of winter-early spring, the most favourable period for the progeny to survive. Most species show seasonal variations in their ovulation frequency (presence or absence of ovulation), spermatogenic activity (from moderate decrease to complete absence of sperm production), gamete quality (variations in fertilization rates and embryo survival), and also sexual behaviour. The intimate mechanism involved is a complex combination of endogenous circannual rhythm driven and synchronized by light and melatonin. Profound and long-term neuroendocrine changes involving different neuromediator systems were described to play a role in these processes. In most species artificial photoperiodic treatments consisting of extra-light during natural short days (in sheep and goats and mares) or melatonin during long days (in sheep and goats) are extensively used to either adjust the breeding season to animal producer needs and/or to completely overcome seasonal variations of sperm production in artificial insemination centres. Pure light treatments (without melatonin), especially when applied in open barns, could be considered as non-invasive ones which fully respect animal welfare. Genetic selection could be one of the future ways to decrease seasonality in sheep and goats.  相似文献   

Automated identification of intensive animal production locations from aerial photography          下载免费PDF全文

KJ Sheffield  JC Hunnam  TN Cuzner  EM Morse‐McNabb  SM Sloan  J Nunan  J Smith  W Harvey  H Lewis 《Australian veterinary journal》2018,96(9):323-331

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Influence of olfactory enrichment on the exploratory behaviour of captive‐housed domestic cats     

JC Machado  G Genaro 《Australian veterinary journal》2014,92(12):492-498

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GONG Observations of Solar Surface Flows     

DH Hathaway  PA Gilman  JW Harvey  F Hill  RF Howard  HP Jones  JC Kasher  JW Leibacher  JA Pintar  GW Simon 《Science (New York, N.Y.)》1996,272(5266):1306-1309

Doppler velocity observations obtained by the Global Oscillation Network Group (GONG) instruments directly measure the nearly steady flows in the solar photosphere. The sun's differential rotation is accurately determined from single observations. The rotation profile with respect to latitude agrees well with previous measures, but it also shows a slight north-south asymmetry. Rotation profiles averaged over 27-day rotations of the sun reveal the torsional oscillation signal-weak, jetlike features, with amplitudes of 5 meters per second, that are associated with the sunspot latitude activity belts. A meridional circulation with a poleward flow of about 20 meters per second is also evident. Several characteristics of the surface flows suggest the presence of large convection cells.  相似文献   

Hydra-headed pesticides     

E D Dickinson JC  J W Parker 《Science (New York, N.Y.)》1971,171(966):16-18

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