Potential implications of acoustic stimuli as a non‐physical barrier to silver carp and bighead carp          下载免费PDF全文

K. A. Murchy  A. R. Cupp  J. J. Amberg  B. J. Vetter  K. T. Fredricks  M. P. Gaikowski  A. F. Mensinger 《Fisheries Management and Ecology》2017,24(3):208-216

The effectiveness of an acoustic barrier to deter the movement of silver carp, Hypophthalmichthys molitrix (Valenciennes) and bighead carp, H. nobilis (Richardson) was evaluated. A pond (10 m × 5 m × 1.2 m) was divided in half by a concrete‐block barrier with a channel (1 m across) allowing fish access to each side. Underwater speakers were placed on each side of the barrier opening, and an outboard motor noise (broadband sound; 0.06–10 kHz) was broadcast to repel carp that approached within 1 m of the channel. Broadband sound was effective at reducing the number of successful crossings in schools of silver carp, bighead carp and a combined school. Repulsion rates were 82.5% (silver carp), 93.7% (bighead carp) and 90.5% (combined). This study demonstrates that broadband sound is effective in deterring carp and could be used as a deterrent in an integrated pest management system.  相似文献   

Degree completion by women and minorities in sciences increases     

Vetter BM 《Science (New York, N.Y.)》1981,212(4490):35

  相似文献   

New report assesses employment prospects for scientists and engineers     

Vetter BM 《Science (New York, N.Y.)》1982,215(4537):1310

  相似文献   

Working women scientists and engineers     

Vetter BM 《Science (New York, N.Y.)》1980,207(4426):28-34

About 80 percent of women trained in science or engineering are in the labor force, but many are employed outside of their fields. Most who withdraw from the labor force do so temporarily, and about half do not take a career break even when they have small children. Factors affecting labor force participation are student status, highest degree level, parental status and age of children, and field of degree. Employment opportunities are restricted in some fields, and women have higher unemployment rates and lower earnings than men. Some policy changes would improve opportunities for women, and better data are needed to monitor their participation in science and technology.  相似文献   

Women, men, and the doctorate     

Vetter BM 《Science (New York, N.Y.)》1975,187(4174):301

  相似文献   

What is your diagnosis? Mucometra     

Baron ML  Morandi F  Hecht S  Leblanc AK 《Journal of the American Veterinary Medical Association》2008,233(9):1401-1402

  相似文献   

MAGNETIC RESONANCE IMAGING FINDINGS IN THE SPINE OF SIX DOGS DIAGNOSED WITH LYMPHOMA          下载免费PDF全文

Brian Allett  Silke Hecht 《Veterinary radiology & ultrasound》2016,57(2):154-161

Lymphoma is one of the most common neoplasms in the dog. Despite its prevalence and the increasing use of advanced diagnostic imaging in veterinary patients only few reports of magnetic resonance imaging (MRI) findings in spinal lymphoma have been published to date. The purpose of this retrospective case series study was to describe the MRI findings in dogs with confirmed lymphoma affecting the spine and/or paraspinal soft tissues. Medical records were searched for patients that had MRI of the spine and a diagnosis of lymphoma during the period of 2005–2015. Data recorded from retrieved MRI studies were presence of focal or multifocal disease, structures involved, and signal characteristics on T2‐W, short tau inversion recovery (STIR), and T1‐W sequences prior to and following intravenous contrast medium administration. Six dogs met the inclusion criteria. Common findings included multifocal disease (4/6), vertebral involvement (5/6), spinal cord compression (4/6), and involvement of more than one spinal compartment (medullary cavity, vertebral canal, paraspinal soft tissues) (6/6). Vertebral changes were confined to the medullary cavity without evidence of cortical osteolysis. There was questionable involvement of the spinal cord in one case. All spinal and paraspinal lesions identified were T2‐W isointense to hyperintense, STIR hyperintense, T1‐W hypointense to isointense, and showed variable moderate to strong contrast enhancement. Additional lesions identified were enlarged intraabdominal lymph nodes, hepatomegaly, splenomegaly, and a splenic nodule. The STIR and T1‐W postcontrast sequences were subjectively the most useful in identification of the spinal and paraspinal lesions.  相似文献   

The frequency of oral famotidine administration influences its effect on gastric pH in cats over time     

Elizabeth Golly  Adesola Odunayo  Maggie Daves  Julie Vose  Josh Price  Silke Hecht  Joerg M. Steiner  Shanna Hillsman  M. Katherine Tolbert 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2019,33(2):544-550

  相似文献   

Diagnostic features,treatment, and outcome of dogs with inflammatory protein‐losing enteropathy     

Silke Salavati Schmitz  Adam Gow  Nick Bommer  Linda Morrison  Richard Mellanby 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2019,33(5):2005-2013

  相似文献   

GnRH‐agonist deslorelin implant alters the progesterone release pattern during early pregnancy in gilts     

Silke M. Haen  Mari Heinonen  Johannes Kauffold  Markku Heikinheimo  Lia L. Hoving  Nicoline M. Soede  Olli A. T. Peltoniemi 《Reproduction in domestic animals》2019,54(3):464-472

The aim of this study was to investigate the relationship of progesterone (P) and luteinizing hormone (LH) during recognition and establishment of pregnancy in the gilt. Therefore, the effects of eliminating episodic LH pulses on P patterns were determined during early pregnancy. To this end, a slow‐release GnRH implant deslorelin was used for GnRH down‐regulation. A group of gilts (GnRHa, n = 8) was implanted with the GnRH‐agonist on Day 11 of pregnancy, while a control group (C, n = 5) was treated with a non‐impregnated placebo implant. Blood was collected via a vena cava caudalis catheter at 10‐min intervals for 8 hr on Day 16 and 21 of pregnancy. As expected, the GnRH implant reduced LH secretion (p < 0.01) and abolished LH pulses completely at Day 16 and Day 21 of pregnancy. On Day 16, there was no difference in P levels between the treatments. However, on Day 21, the GnRH‐agonist treatment led to significantly increased P concentrations (p < 0.01) compared with the control gilts. Progesterone was secreted in a pulsatile manner in both treatment groups and no relationship between LH pulsatility and P pulsatility was observed. In conclusion, abolishment of LH pulsatility did not affect the pulsatile pattern of P secretion but led to an unexpected overall increase in P on Day 21 of pregnancy; this effect was delayed and occurred 10 days after commencing treatment with the GnRH depot agonist. The elevation of P on Day 21 of pregnancy in the GnRHa group suggests either a reduced negative feedback effect or an increased autocrine response by the corpora lutea.  相似文献