Influence of the FecXR Allele in Heterozygous Ewes on Follicular Population and Outcomes of IVP and ET using LOPU‐Derived Oocytes     

B Lahoz  JL Alabart  J Folch  P Sánchez  E Echegoyen  MJ Cocero 《Reproduction in domestic animals》2013,48(5):717-723

Ewes heterozygous for the FecX^R allele (R+) in the bone morphogenetic protein 15 (BMP15) gene display increased ovulation rate and prolificacy. Besides this phenotypic advantage, the influence of the FecX^R allele on follicle number and size, oocyte competence and in vitro production (IVP) remains undefined. With these aims, 8 R+ and 8 wild‐type (++) ewes were subjected to 2 laparoscopic ovum pick‐up (LOPU) trials (four sessions per trial; two with and two without FSH) and subsequent IVP and fresh embryo transfer. All follicles >3 mm were punctured (n = 1673). Genotype did not significantly affect the number of punctured follicles per ewe and session (10.4 and 10.2 in R+ and ++ untreated ewes, 17.4 and 14.3 in R+ and ++ FSH‐treated ewes, respectively), but follicular diameter of R+ ewes was significantly reduced compared with ++ ewes (?0.2 mm in untreated and ?0.8 mm in FSH‐treated ewes; p < 0.01). R+ ewes showed higher recovery rate and increased numbers of total and suitable cumulus–oocyte complexes for in vitro maturation (IVM). Similar rates of day 8 blastocysts were observed in R+ (36.1%, 147/407) and ++ (32.6%, 100/307) ewes, but the final output of day 8 blastocysts per ewe and session was higher in R+ ewes (+0.75; p < 0.005), without differences in survival rate at birth of the transferred embryos (40.4%, 21/52 vs 36.4%, 16/44, respectively). In conclusion, a higher number of oocytes proven to be competent for in vitro development and embryo survival after transfer are recovered from R+ ewes, despite the lower mean size of their follicles at puncture.  相似文献   

Domestic Carnivore's Development: Detection of Oct‐4, A Pluripotency Marker,in Pharyngeal Arches     

KCS Roballo  ACM Ercolin  JB Casals  NCG Pieri  RSN Barreto  MJ Illera  DS Martins  MA Miglino  CE Ambrósio 《Reproduction in domestic animals》2013,48(3):e41-e43

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24-Hour Secretion Patterns of Plasma Oestradiol 17β in Pony Mares in Late Gestation     

LJ O'Donnell  BR Sheerin  JM Hendry  MJ Thatcher  WW Thatcher  MM LeBlanc 《Reproduction in domestic animals》2003,38(3):233-235

The mare exhibits nocturnal uterine contractions in the last 6 days of gestation. It is hypothesized that estradiol 17β (O17β) may be associated with the nightly increase in uterine contractions. The 24‐h secretion pattern of plasma O17β was measured in 3 pony mares in late gestation to identify changes in release as the mare neared parturition. Blood was collected weekly at 08:00 hours beginning on day 240 and every third day from day 330 until delivery. Serial blood samples were collected from each mare every 30‐min for 24‐h beginning on gestation day 310 and every sixth day thereafter until parturition. Concentrations of O17β were elevated at night with lowest concentrations occurring directly before sunset (p < 0.01). The natural log of the variance was increased at sunset (p < 0.01) and was decreased during the 6‐h period immediately after sunrise. This pattern was especially evident in the 6 days that preceded parturition. The contrast between nocturnal and daytime concentrations of O17β in the last 6 days of gestation may contribute to night‐time delivery in the mare.  相似文献   

Factors affecting mechanical nociceptive thresholds in healthy sows          下载免费PDF全文

Elena Nalon  Dominiek Maes  Sofie Piepers  Polly Taylor  Miriam MJ van Riet  Geert PJ Janssens  Sam Millet  Frank AM Tuyttens 《Veterinary anaesthesia and analgesia》2016,43(3):343-355

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Correlation of the antinociceptive action and plasma concentration of fentanyl following intravenous administration in cats     

SA Robertson  WL Davies  PM Taylor  MJ Dixon 《Veterinary anaesthesia and analgesia》2002,29(2):94-94

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Lymphocystis disease in snapper (Pagrus auratus) from Spencer Gulf, South Australia     

PJK DURHAM  MJ ALLANSON  WG HUTCHINSON 《Australian veterinary journal》1996,74(4):312-313

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Macrozamia toxicosis in a dog     

JN MILLS  MJ LAWLEY  J. THOMAS 《Australian veterinary journal》1996,73(2):69-72

A case of Macrozamia riedlei seed poisoning is described in a young Dachshund. Vomiting and depression commenced within 6 h of ingestion; other signs that developed included severe hepatopathy, jaundice, abdominal pain that was unresponsive to analgesics, severe gastro-intestinal haemorrhage and thrombocytopenia as well as crystalluria and marrow dyserythropoiesis. The dog was euthanased 6 days after ingestion of the seeds.  相似文献   

Diagnostic ultrasound in veterinary practice: How safe is it?     

MM HORDER  SB BARNETT†  MJ EDWARDS 《Australian veterinary journal》1996,73(1):10-15

This paper provides information on the safety of ultrasonic diagnostic procedures as currently used in veterinary practice. The known mechanisms of action are described and selected literature on biological effects of ultrasound is reviewed. Current international consensus is presented on the safety of medical ultrasound with respect to thermal effects. To date, there is no independently verified clinical evidence that the level of exposure delivered to the tissues during scanned grey-scale (‘B-mode’) imaging has any adverse effects. Lung haemorrhage has been observed in animal experiments using diagnostic exposures, but the effects have not been reported in the foetus. Equipment that uses pulsed Doppler transmits higher acoustic outputs in a stationary beam, and can produce temperature increases that may have significant biological consequences. When considering sonographic and pulsed Doppler examinations of the prenatal animal, the safety margins are small and the operator should be aware of the acoustic output of the equipment, the exposure time, and the sensitivity of target tissues.  相似文献   

David Meredith Armstrong     

MJ KABAY 《Australian veterinary journal》1992,69(12):339-339

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Crassulacean Acid Metabolism in the Strangler Clusia rosea Jacq     

Ting IP  Lord EM  Sternberg Lda S  Deniro MJ 《Science (New York, N.Y.)》1985,229(4717):969-971

Observations of malic acid fluctuation, leaf anatomy, and stable carbon isotopic composition showed that the epiphytic strangler Clusia rosea, growing on Saint John, U.S. Virgin Islands, has crassulacean acid metabolism. This hemiepiphyte may be the only woody dicotyledonous tree species among the many thousands of flowering species in the 30 or more plant families that shows this type of metabolism. The finding has implications with respect to water balance during the process whereby Clusia rosea establishes itself as a tree, since crassulacean acid metabolism is a photosynthetic adaptation to water-stressed environments.  相似文献