Does motor noise from recreational boats alter parental care behaviour of a nesting freshwater fish?          下载免费PDF全文

Ryan J. Maxwell  Aaron J. Zolderdo  Robert de Bruijn  Jake W. Brownscombe  Erica Staaterman  Austin J. Gallagher  Steven J. Cooke 《水产资源保护:海洋与淡水生态系统》2018,28(4):969-978

Successful medical management of a domestic longhair cat with subdural intracranial empyema and multifocal pneumonia          下载免费PDF全文

Thomas J.A. Cardy BSc  BVetMed  MVetMed  PhD  Richard Lam BVSc  MVetMed  DECVDI  Laureen M. Peters Dr med vet  Màrian Matas Riera DVM  DECVO  Steven De Decker DVM  PhD  MVetMed  DECVN 《Journal of Veterinary Emergency and Critical Care》2017,27(2):238-242

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Treatment of septic arthritis of the coxofemoral joint in 12 foals          下载免费PDF全文

F. Barceló Oliver DVM  MRCVS  T. M. Russell BVMS  MACVSc  DipECVS  K. L. Uprichard BSc  BVMS  MRCVS 《Veterinary surgery : VS》2017,46(4):530-538

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The effect of nail characteristics on surface bacterial counts of surgical personnel before and after scrubbing          下载免费PDF全文

Jade M. Hardy MS  DVM  Tina J. Owen DVM  Diplomate ACVS  Lisa P. Jones BSc  Margaret A. Davis DVM  MPH  PhD 《Veterinary surgery : VS》2017,46(7):952-961

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Evaluation of 10-year temporal and spatial variability in structure and growth across contrasting commercial thinning treatments in spruce-fir forests of northern Maine,USA     

Christian Kuehne  Aaron Weiskittel  Arne Pommerening  Robert G. Wagner 《Annals of Forest Science》2018,75(1):20

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Has agriculture dispersed worldwide from a single origin?     

Aaron Rottenberg 《Genetic Resources and Crop Evolution》2017,64(6):1107-1113

Some eleven thousand years ago hunter–gatherers in the Near East initiated their transition to farming using an assemblage of eight founder crops: three cereals, four legumes and flax. The evidence show that each of these plant species was brought into domestication once or mostly twice, with no further redomestication. It seems that these species were carefully chosen by humans from the many hundreds of plants used. Apparently, these eight crops were those that best responded to the sowing–reaping agrotechnique, reflecting the biological factors that were later manifested in the success of these founder crops. While changing their own life style, the novel, successful farmers have gained extra food, prestige, property, power, and as a result more spouses and children, eventually leading to their higher biological fitness. This in turn led to the expansion of agriculture either by idea diffusion or by the dispersal of the farmers themselves with their original founder crops. Farming has dispersed to Europe, Asia and North Africa during the following millennia. Concurrently, other remote hunter–gatherer populations in additional worldwide centers, notably East Asia and the Americas have also moved to farming life, conceiving local plant species and the relevant agrotechniques. Regarding the life history of the various cultivated plant species and the capabilities of our ancestors it is suggested that the simplest explanation for the beginning of agriculture in the new worldwide centers is the idea diffusion to these remote areas.  相似文献   

Balanced nutrient density for broiler chickens using a range of digestible lysine-to-metabolizable energy ratios and nutrient density:Growth performance,nutrient utilisation and apparent metabolizable energy     

Reza Barekatain  Luis F. Romero  Jos Otvio B. Sorbara  Aaron J. Cowieson 《动物营养（英文）》2021,7(2):430

Currently, specific nutrient concentration, metabolizable energy (ME) and digestible amino acids are used as feed formulation criteria. A balanced nutrient density (BND) concept based on 2 criteria of nutrient density and balanced amino acids-to-ME ratio may offer more flexibility in optimisation of profit in formulation of diets compared with current formulation based on set values per unit of feed mass. A total of 672 one-d-old off-sex male Ross 308 broiler chickens were used across two 42-d performance trials in a 3 × 2 factorial arrangement of treatments with each diet replicated 8 times (14 birds per replicate). The experimental factors were 2 nutrient density levels (low [LD] and high [HD]) and 3 digestible lysine-to-ME ratios (DLYS:ME; low, medium, and high). Low density diets had ME of 2,876 and 3,023 kcal/kg for starter and finisher, respectively, while values for HD diets were 3,169 and 3,315 kcal/kg with proportionally higher non-nitrogenated nutrients. Separate digestibility and apparent metabolizable energy (AME) assays were conducted at d 21 and 42. Digestibility assays at d 7 were conducted on birds used for performance trials. Regardless of the diet density, birds fed low DLYS:ME had a lower (P < 0.01) feed intake (d 0 to 42) than medium and high DLYS:ME. Without interaction, birds fed low and medium DLYS:ME had a similar body weight gain being the heaviest while birds low DLYS:ME were the lightest. By an interaction (P < 0.05), the highest overall FCR value was observed for birds fed LD × low DLYS:ME and improved linearly when DLYS:ME increased to the highest level reaching a limit for birds fed HD × medium DLYS:ME. Calorie conversion linearly decreased (P < 0.001) with increments in DLYS:ME. Jejunal and ileal starch and protein digestibility were affected on d 21 and 42 but not on d 7 of age. Given the independence of response on BW and feed consumption, the use of BND as a flexible system in diet formulations has the potential to enable more accurate formulation for optimisation of growth performance of broiler chickens.  相似文献