Feeding ragworm (Nereis virens Sars) increases haematocrit and haemoglobin levels in common sole (Solea solea L.)          下载免费PDF全文

Jeroen Kals  Robbert JW Blonk  Henk W van der Mheen  Johan W Schrama  Johan AJ Verreth 《Aquaculture Research》2016,47(10):3346-3349

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Identifying the effect of density dependence,agricultural practices and climate variables on the long‐term dynamics of weed populations     

D García de León  R P Freckleton  M Lima  L Navarrete  E Castellanos  J L González‐Andújar 《Weed Research》2014,54(6):556-564

Quantifying the impacts of climate change on weed populations requires an understanding of the relative contributions of endogenous and exogenous factors on their numerical fluctuations. Here, we have used long‐term data (26 years) of seven weed species growing in a cereal–legume rotation from a locality in central Spain to determine the importance of endogenous (density dependence) and exogenous (tillage system, crop rotation, temperature and precipitation) factors. Density dependence was the main driver of the population dynamics studied, and it was exhibited more frequently under zero tillage (86% of the species) than under minimum tillage (57% of the species). Our results confirmed previous findings and provided stronger support for density dependence under zero tillage than under minimum tillage. Under the latter, temperature negatively affected the population growth rate of Descurainia sophia and positively Atriplex patula. We found no effect of either precipitation or crop rotation on population dynamics. Our findings could underpin an awareness campaign aimed at farmers to prevent them from drawing unwarranted conclusions regarding the efficacy of the particular control method used in a given year.  相似文献   

Investigation of Alternanthera repens and Bidens odorata on gastrointestinal disease     

Astudillo-Vázquez A  Dávalos Valle H  De Jesús L  Herrera G  Navarrete A 《Fitoterapia》2008,79(7-8):577-580

Alternanthera repens and Bidens odorata are used as medication for gastrointestinal diseases today, mainly in relation to diarrhea; therefore, pharmacological tests with aqueous and ethanol extracts of both species were carried out in mice. Using charcoal meal, the activity of the four extracts on intestinal motility was determined, finding that they inhibit the advance of the gastrointestinal content. Also, the lethal media doses were estimated in order to examine the plants' safety. The data confirmed the validity of the medicinal use for both plant species, contributing to explain the use of these plants as antidiarrheal agents in Mexican traditional medicine.  相似文献   

Efficacy of a commercial vaccine against different strains of rabbit haemorrhagic disease virus          下载免费PDF全文

AJ Read  PD Kirkland 《Australian veterinary journal》2017,95(7):223-226

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A comparison of cardiopulmonary effects and anaesthetic requirements of two dexmedetomidine continuous rate infusions in alfaxalone-anaesthetized Greyhounds     

Setefilla Quirós-Carmona  Rocío Navarrete  Juan M. Domínguez  María del Mar Granados  Rafael J. Gómez-Villamandos  Pilar Muñoz-Rascón  Daniel Aguilar  Francisco J. Funes  Juan Morgaz 《Veterinary anaesthesia and analgesia》2017,44(2):228-236

Objective

To determine the effects of two dexmedetomidine continuous rate infusions on the minimum infusion rate of alfaxalone for total intravenous anaesthesia (TIVA), and subsequent haemodynamic and recovery effects in Greyhounds undergoing laparoscopic ovariohysterectomy.

Study design

Prospective, randomized and blinded clinical study.

Animals

Twenty-four female Greyhounds.

Methods

Dogs were premedicated with dexmedetomidine 3 μg kg^?1 and methadone 0.3 mg kg^?1 intramuscularly. Anaesthesia was induced with IV alfaxalone to effect and maintained with a TIVA mixture of alfaxalone in combination with two different doses of dexmedetomidine (0.5 μg kg^?1 hour^?1 or 1 μg kg^?1 hour^?1; groups DEX0.5 and DEX1, respectively). The alfaxalone starting dose rate was 0.07 mg kg^?1 minute^?1 and was adjusted (± 0.02 mg kg^?1 minute^?1) every 5 minutes to maintain a suitable depth of anaesthesia. A rescue alfaxalone bolus (0.5 mg kg^?1 IV) was administered if dogs moved or swallowed. The number of rescue boluses was recorded. Heart rate, arterial blood pressure and arterial blood gas were monitored. Qualities of sedation, induction and recovery were scored. Differences between groups were tested for statistical significance using a Student’s t test or Mann–Whitney U test as appropriate.

Results

There were no differences between groups in sedation, induction and recovery quality, the median (range) induction dose of alfaxalone [DEX0.5: 2.2 (1.9–2.5) mg kg^?1; DEX1: 1.8 (1.2–2.9) mg kg^?1], total dose of alfaxalone rescue boluses [DEX0.5: 21.0 (12.5–38.8) mg; DEX1: 22.5 (15.5–30.6) mg] or rate of alfaxalone (DEX0.5: 0.12 ± 0.04 mg kg^?1 minute^?1; DEX1: 0.12 ± 0.03 mg kg^?1 minute^?1).

Conclusions and clinical relevance

Co-administration of dexmedetomidine 1 μg kg^?1 hour^?1 failed to reduce the dose rate of alfaxalone compared with dexmedetomidine 0.5 μg kg^?1 hour^?1 in Greyhounds undergoing laparoscopic ovariohysterectomy. The authors recommend an alfaxalone starting dose rate of 0.1 mg kg^?1 minute^?1. Recovery quality was good in the majority of dogs.  相似文献   

Haemolytic anaemia in cattle in NSW associated with Theileria infections     

MM Izzo  I Poe  N Horadagoda  AJ De Vos  JK House 《Australian veterinary journal》2010,88(1-2):45-51

Several outbreaks of anaemia, jaundice, abortion and mortality in cattle in New South Wales were attributed to the intracellular parasite, Theileria buffeli . Disease occurred predominantly in periparturient animals that had been moved from inland to coastal areas. Diagnosis was made via exclusion of other causes of haemolytic anaemia and observation of the parasite in blood smears. Treatments included both registered and non-registered products. There is a possibility of a new strain of Theileria sp. in Australia and the possible vectors encountered in NSW are discussed.  相似文献   

Effect of Luteinizing Hormone and Tumour Necrosis Factor‐Alpha on VEGF Secretion by Cultured Porcine Endometrial Stromal Cells     

MM Kaczmarek  A Blitek  D Schams  AJ Ziecik 《Reproduction in domestic animals》2010,45(3):481-486

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Effect of N‐acetyl‐L‐cysteine Supplementation in Semen Extenders on Semen Quality and Reactive Oxygen Species of Chilled Canine Spermatozoa     

AJ Michael  C Alexopoulos  EA Pontiki  DJ Hadjipavlou‐Litina  P Saratsis  HN Ververidis  CM Boscos 《Reproduction in domestic animals》2010,45(2):201-207

The objective of this study was to evaluate the quality of chilled dog semen processed with extenders containing various concentrations of N‐acetyl‐L‐cysteine (NAC). Ejaculates from five dogs were collected, pooled and evaluated for concentration, motility, rapid steady forward movement (RSF‐movement), viability, acrosomal integrity and by the hypo‐osmotic swelling test (HOST). In addition, superoxide anion (O₂^‐?) production, hydroxyl radicals (OH^?) and total reactive oxygen species (tROS) were determined. The pool was divided into five aliquots, which were diluted to a final concentration of 66.66 × 10⁶ spermatozoa/ml with Tris‐glucose‐egg yolk extender containing one of the following concentrations of NAC (0, 0.5, 1, 2.5 or 5 mm ). The semen aliquots were chilled and preserved at 4°C. Semen quality was evaluated after rewarming at 72 h. Sperm motility was significantly higher with the 0.5 mm concentration compared with the control group (p = 0.001). Rapid steady forward movement was higher with the 0.5 and 1 mm concentrations compared with the control and 5 mm group (p < 0.001). Viability and HOST percentages were not significantly altered. Compared with the control, the 5 mm concentration showed significantly reduced percentages of spermatozoa with normal acrosomes (p = 0.049). None of the ROS values at 72 h were significantly affected by the presence of NAC in semen extenders, although all NAC concentrations showed lower O₂^‐? and OH^? values compared with the control. Only the concentrations of 1 and 5 mm inhibited the significant increase of tROS values after 72 h, compared with the fresh semen value. In conclusion, NAC supplementation of semen extenders is beneficial to semen motility of canine spermatozoa during chilling with the 0.5 mm concentration being the most effective, although no significant ROS inhibition was observed at 72 h.  相似文献   

Pathological and Bacteriological Studies of Hydrosalpinx in Buffaloes     

OI Azawi  HF Al‐Abidy  AJ Ali 《Reproduction in domestic animals》2010,45(3):416-420

The objectives of the present study were to investigate the bacteria accompanying hydrosalpinx of the buffalo cow and investigate the correlation between bacterial infection of the uterus and hydrosalpinx. Buffalo cows’ reproductive tracts were collected from Mosul abattoir. A total 385 uterine samples were examined of which 25 were having hydrosalpinx. Swabs for bacteriology, fluid for cytology and biopsies for histopathology were collected from the hydrosalpinx and the uterus from each samples included in this study. Results of this study indicated high prevalence of hydrosalpinx (6.5%) including unilateral (n = 19; 76%) and bilateral (n = 6; 24%) hydrosalpinx. Although 16 samples (64%) of the hydrosalpinx samples had no bacterial growth, the most prevalent bacteria recovered from hydrosalpinx were Corynebacterium hemolyticum and Actinomyces bovis, 42.8% and 28.6%, respectively. The most prevalent bacteria in the uterus were Archanobacterium pyogenes (18.5%), Staphylococcus aureus (14.8%), and Listeria monocytogenes (11.0%). Higher rates of leukocytes infiltration (p < 0.01) were observed in the uterine discharge than hydrosalpinx. A significant (p < 0.01) increase in lymphocytes was found in uterine discharge. Microscopic examination of the hydrosalpinx showed mucosal atrophy and dilatation of oviductal lumen without any signs of inflammation. It could be concluded that there is no correlation between bacteria isolated from uterus and hydrosalpinx. No association was found between bacteriological cultures and hydrosalpinx. Inflammation of the uterine tissue could be extended to utero‐tubal junction producing local inflammation resulting in fibrosis and tubal obstruction. The obstruction in the lumen of the oviducts resulted in accumulation of fluid.  相似文献   

Root-knot nematode (Meloidogyne) management in vegetable crop production: The challenge of an agronomic system analysis     

Béatrice CollangeMireille Navarrete  Gaëlle PeyreThierry Mateille  Marc Tchamitchian 《Crop Protection》2011,30(10):1251-1262

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