Spatiotemporal patterns of mountain whitefish (Prosopium williamsoni) in response to a restoration of longitudinal connectivity          下载免费PDF全文

Peter M. Kiffney  Ben Cram  Paul L. Faulds  Karl Burton  Michele Koehler  Thomas P. Quinn 《Ecology of Freshwater Fish》2018,27(4):1037-1053

To examine the role of longitudinal connectivity on the spatial and temporal dynamics of mountain whitefish (Prosopium williamsoni), we quantified movement and population dynamics following installation of the Landsburg Dam fishway, Cedar River, WA, USA. Mountain whitefish is widely distributed, poorly studied and not the focus of restoration. Before the fishway, mountain whitefish were not observed above the dam. Here, we focus on snorkel counts collected at reach and mesohabitat (e.g. pools) scales over 11 summers on the 20‐km above‐dam segment following restoration. A camera within the ladder provided number, size and movement timing, thereby informing on behaviour and recolonisation. Segment‐scale abundance increased following fish passage reaching an asymptote in 7 years, and mountain whitefish were detected throughout the main stem in 10 years. Annual movement through the ladder increased over time and was positively correlated with instream abundance and discharge, but negatively correlated with water temperature. About 60% of fish movements occurred in spring and early summer, potentially for foraging opportunities. Reach‐scale abundance peaked between 7 and 10 km from the dam; deep, cool (~10.6 to 11.6°C) conditions characterised these reaches. At the mesohabitat scale, mountain whitefish detection increased with depth and velocity after accounting for distance from the dam. Our results show how restoring longitudinal connectivity allowed this nontarget species to colonise newly available habitat. Their response supports the critical roles of longitudinal connectivity and environmental conditions, that manifest at different spatial scales, in dictating how freshwater fish respond to habitat disturbance.  相似文献   

A comparison of polymerase chain reaction with and without RNA extraction and virus isolation for detection of bovine viral diarrhea virus in young calves.     

D Deregt  P S Carman  R M Clark  K M Burton  W O Olson  S A Gilbert 《Journal of veterinary diagnostic investigation》2002,14(5):433-437

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BVDV in Australian alpacas: natural infection and clinical profiles following co‐mingling with a persistently infected heifer          下载免费PDF全文

CA Evans  E Erregger  F Hemmatzadeh  PD Cockcroft 《Australian veterinary journal》2018,96(7):262-268

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Seroprevalence of antibodies to Pestivirus infections in South Australian sheep flocks          下载免费PDF全文

CA Evans  SR Lanyon  RM O’Handley  MP Reichel  PD Cockcroft 《Australian veterinary journal》2018,96(8):312-314

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Effects of sporidesmin on cultured biliary tract cells from Romney lambs that differed in their sensitivity to sporidesmin     

GC Lindsay  CA Morris  M Boucher  K Capundan 《New Zealand veterinary journal》2018,66(6):325-331

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Preliminary evaluation of a gel tube agglutination major cross‐match method in dogs          下载免费PDF全文

Dania Villarnovo  Shelley A. Burton  Barbara S. Horney  Allan L. MacKenzie  Raphaël Vanderstichel 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2016,45(3):411-416

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Relationships between equine airway reactivity measured by flowmetric plethysmography and specific indicators of airway inflammation in horses with suspected inflammatory airway disease          下载免费PDF全文

M. Wichtel  D. Gomez  S. Burton  J. Wichtel  A. Hoffman 《Equine veterinary journal》2016,48(4):466-471

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Digital analysis of ulnar trochlear notch sclerosis in Labrador retrievers     

Burton NJ  Comerford EJ  Bailey M  Pead MJ  Owen MR 《The Journal of small animal practice》2007,48(4):220-224

OBJECTIVES: To compare ulnar trochlear notch bone radiopacity in Labrador retrievers with and without fragmented medial coronoid process using quantitative analysis of film density on digitised radiographs. METHODS: Mediolateral view elbow radiographs from Labrador retrievers (n=34) aged between six and 18 months were obtained and digitised. Images from dogs with an arthroscopic diagnosis of fragmentation of the medial coronoid process (n=17) were compared with that of a control population (n=17), and this data subject to statistical analysis. RESULTS: A statistically significant relationship between the presence of increased trochlear notch radiopacity and a fragmented medial coronoid process was identified. Fractional analysis of this area shows the region of greatest difference in radiopacity between normal and fragmented medial coronoid process cohorts to be in the trochlear region of the medial coronoid process of the ulna. A decrease in radiopacity values in the dysplastic group versus the normal cohort was observed for the region of the proximo-caudal ulnar trochlear notch. CLINICAL SIGNIFICANCE: An increase in ulnar trochlear notch radiopacity is a finding associated with fragmentation of the medial coronoid process in Labrador retrievers.  相似文献   

A simulation of water allocation policies in times of water shortage     

M. A. Burton 《Irrigation and Drainage Systems》1994,8(2):61-81

The use of a simulation package to study the consequences of various water allocation policies during time of water shortage is described. The study shows that simulation can be a valuable aid to irrigation scheme managers in their decision making.  相似文献   

Spreadsheets for water management — a case study from the Brantas Delta,East Java     

N. Bullock  M. A. Burton 《Irrigation and Drainage Systems》1988,2(3):259-278

The use of commercially available spreadsheet programs for scheduling of water supplies for large scale irrigation networks is a relatively new phenomenom. The paper describes the development and application of such a program for a 30 000 ha irrigation scheme in the Brantas Delta, East Java. The program has been in use for day-to-day scheduling of main system supplies since April 1986, during which time refinements and adjustments have been necessary to formulate a working package. The paper draws conclusions regarding the value of the program for improving water management.  相似文献