The Surgical Anatomy of the Stifle Joint in Sheep   总被引：2，自引：0，他引：2  

MATTHEW J. ALLEN VetMB  PhD    JOHN E. F. HOULTON VetMB  Diplomate ECVS    STEPHEN B. ADAMS DVM  Diplomate ACVS  NEIL RUSHTON MD  FRCS 《Veterinary surgery : VS》1998,27(6):596-605

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Problems of herbicide assessment in peanuts in Jamaica     

JOHN L. HAMMERTON 《Weed Research》1976,16(1):27-35

Delays of 40 or 60 days in weeding peanuts (Arachis hypogaea L.) gave lower yields and fewer pods per plant but did not affect seed number per pod. Yield, pod number per plant, seeds per pod and mean weight per seed were all less in unweeded plots. In three herbicide trials crop yields were not closely correlated with crop vigour scores made several weeks before crop maturity, or with weediness scores. Correlations between yields and weed dry weights were better, but certain high-yielding herbicide treatments gave poor weed control and in some cases had low crop vigour scores. Most yield differences reflected differences in pod number per plant, with additional smaller compensating or additive effects on the other components. Certain herbicides apparently gave high mean seed weights without diminishing seed numbers per pod. Pre-emergence alachlor was the most promising herbicide, combined with preplant incorporated vernolate if nutgrass was serious. Napropamide and metobromuron merit further testing.  相似文献   

Quelques aspects de la physiologie des radis (Raphanus sativus L.) traités par la simazine     

JOHN L. GNANARETHINAM 《Weed Research》1976,16(4):255-262

Some aspects of the physiology of radishes (Raphanus sativus L.) treated with simazine. III.The evalution of nitrogen The effect of simazine on the overall metabolism of nitrogen and on protein synthesis in radish (Raphanus sativus L.) was studied. In Ihe roots and petioles the total nitrogen content showed litlle change, whereas it showed a marked increase in the leaf blades about the 5th and 6th days after treatment; it subsequently decreased but remained higher than the initial quantity; then it became stable until the plant died. Radishes treated with simazine absorbed more nitrogen than the control. Study of protein nitrogen, organic soluble nitrogen and nitrate nitrogen showed that simazine did not affect protein synthesis.  相似文献   

Earnings Impact of Employment and Training Programs for Young Men     

JOHN L. IACOBELLI  S. RAY SCHULTZ 《Growth and change》1979,10(4):32-37

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Groundfish species associations with distinct oceanographic habitats in the Northern California Current     

MARIA JOSÉ JUAN-JORDÁ  JOHN A. BARTH  M. E. CLARKE  W. W. WAKEFIELD 《Fisheries Oceanography》2009,18(1):1-19

Ecosystem-based management places a strong emphasis on habitat, but little work has been done to examine how water column properties may influence the distribution, abundances and structure of groundfish assemblages. We identified and described oceanographic habitats in the northern California Current based on temperature, salinity, chlorophyll- a and the inherent variability in these factors. We then examined the distribution and the abundance of groundfishes in relation to these oceanographic habitats and conditions with the long-term goal of improving science for ecosystem-based management of the groundfish fishery of the west coast of the USA. Five summertime oceanographic habitats with distinct physical and biological characteristics were identified in the northeast Pacific Ocean off the northwest Coast of the USA: Offshore Habitat, Upwelling Habitat, Highly Variable Upwelling Habitat, River Plume Habitat, and Highly Variable Habitat. Overall, the species composition differed among the five oceanographic habitats, with certain groundfish species being highly indicative of some habitats; however, the majority of the associations were weak due to overlap of species distributions in the nearshore oceanographic habitats. In contrast, groundfish species showed strong associations with individual oceanographic factors, primarily depth, surface chlorophyll- a , and bottom salinity and temperature. In addition, latitudinal variations in upwelling intensity, river discharge and productivity led to the identification of three regions where high chlorophyll- a concentrations were associated with large abundances of specific groundfish species. The combined oceanographic datasets and data products that we produced have the potential to be a powerful tool for improving our knowledge of the west coast ecosystem.  相似文献   

Plasticity in vertical behaviour of migrating juvenile southern bluefin tuna (Thunnus maccoyii) in relation to oceanography of the south Indian Ocean     

SOPHIE BESTLEY  JOHN S. GUNN  MARK A. HINDELL 《Fisheries Oceanography》2009,18(4):237-254

Electronic tagging provides unprecedented information on the habitat use and behaviour of highly migratory marine predators, but few analyses have developed quantitative links between animal behaviour and their oceanographic context. In this paper we use archival tag data from juvenile southern bluefin tuna ( Thunnus maccoyii , SBT) to (i) develop a novel approach characterising the oceanographic habitats used throughout an annual migration cycle on the basis of water column structure (i.e., temperature-at-depth data from tags), and (ii) model how the vertical behaviour of SBT altered in relation to habitat type and other factors. Using this approach, we identified eight habitat types occupied by juvenile SBT between the southern margin of the subtropical gyre and the northern edge of the Subantarctic Front in the south Indian Ocean. Although a high degree of variability was evident both within and between fish, mixed-effect models identified consistent behavioural responses to habitat, lunar phase, migration status and diel period. Our results indicate SBT do not act to maintain preferred depth or temperature ranges, but rather show highly plastic behaviours in response to changes in their environment. This plasticity is discussed in terms of the potential proximate causes (physiological, ecological) and with reference to the challenges posed for habitat-based standardisation of fishery data used in stock assessments.  相似文献   

Movement and behaviour of large southern bluefin tuna (Thunnus maccoyii) in the Australian region determined using pop‐up satellite archival tags     

TOBY A. PATTERSON  KAREN EVANS  THOR I. CARTER  JOHN S. GUNN 《Fisheries Oceanography》2008,17(5):352-367

Pop‐up satellite archival tags (PSATs) were deployed on 52 large (156–200 cm length to caudal fork) southern bluefin tuna (Thunnus maccoyii) in the western Tasman Sea during the austral winters of 2001–2005. Southern bluefin tuna (SBT) were resident in the Tasman Sea for up to 6 months with movements away from the tagging area occurring at highly variable rates. The data indicated a general tendency for SBT to move south from the tagging area in the Western Tasman Sea. Four individuals migrated west along the southern continental margin of Australia and into the Indian Ocean. Three individuals moved east into the central Tasman Sea, with one individual reaching New Zealand. We also describe the first observed migration of an SBT from the Tasman Sea to the Indian Ocean spawning grounds south of Indonesia. Individuals spent most of their time relatively close to the Australian coast, with an estimated 84% of time spent in the Australian Fishing Zone. SBT favored temperatures between 19 and 21°C, adjusting their depth to the vertical temperature distribution. Distinct diurnal diving patterns were observed and adjustment of depth to maintain constant ambient light levels over a 24‐h period. The findings of this study are a significant advance toward greater understanding of the spatial dynamics of large SBT and understanding the connectivity between distant regions of their distribution.  相似文献   

Intracapsular Prostatic Omentalization: A New Technique for Management of Prostatic Abscesses in Dogs     

RICHARD A. S. WHITE BVetMed  PhD  DVR  FRCVS  Diplomate ACVS  Diplomate ECVS  JOHN M. WILLIAMS MA  VetMB  FRCVS 《Veterinary surgery : VS》1995,24(5):390-395

Twenty dogs with abscessation of the prostate gland were treated by celiotomy, drainage, and digital exploration of the gland through bilateral capsulectomy wounds. Omentum was introduced through the capsulectomy wounds and packed into the abscess cavities around the prostatic urethra. Most dogs were discharged from the hospital within 48 hours of the surgery. Long-term resolution of the problem (no recurrence within 12 months) was achieved in 19 dogs. One dog had recurrent abscessation that was managed by the placement of dependant Penrose drains. Temporary tube cystostomy was performed postoperatively in one dog for the management of transient dysuria. One dog with septic peritonitis resulting from preoperative abscess rupture was managed by concurrent open peritoneal drainage. Intracapsular prostatic omentalization was a simple and effective means of managing prostatic abscessation with minimal requirement for postoperative hospitalization of the patient. The frequency of serious complications, including postoperative urinary incontinence, was low.  相似文献   

Craniolateral Approach to the Humerus with Transection of the Brachialis Muscle   总被引：1，自引：0，他引：1  

MAURA K. WALLACE dvm  JOHN BERG dvm  ms  Diplomate acvs 《Veterinary surgery : VS》1991,20(2):97-99

Six fractures of the midshaft or distal third of the humerus were repaired through a modified craniolateral approach in which the brachialis muscle was transected rather than retracted to improve exposure of the bone. The approach simplified fracture reduction and fixation. Normal fracture healing and excellent limb function resulted in each case.  相似文献   

Xylazine hydrochloride-induced hyperglycemia and hypoinsulinemia in thoroughbred horses     

JOHN C. THURMON  CAROL NEFF-DAVIS†  LLOYD E. DAVIS †  ROBERT A. STOKER  G. JOHN BENSON  THEODORE F. LOCK 《Journal of veterinary pharmacology and therapeutics》1982,5(4):241-245

The effects of intravenous xylazine (1.1 mg/kg) were studied in six thoroughbred horses (five mares and a stallion). Plasma glucose concentration increased to 168% of control at 45 min and decreased to 112% of control at 180 min. Insulin had decreased to 31% of control at 15 min. Thereafter, insulin concentration increased, reaching its highest concentration at 150 min. The mechanism for these changes is not fully understood and further investigation is indicated.  相似文献