Twenty Far East Greylag Geese,Anser anser rubrirostris,were captured and fitted with Global Positioning System/Global System for Mobile Communications(GPS/GSM)loggers to identify breeding and wintering areas,migration...Twenty Far East Greylag Geese,Anser anser rubrirostris,were captured and fitted with Global Positioning System/Global System for Mobile Communications(GPS/GSM)loggers to identify breeding and wintering areas,migration routes and stopover sites.Telemetry data for the first time showed linkages between their Yangtze River wintering areas,stopover sites in northeastern China,and breeding/molting grounds in eastern Mongolia and northeast China.10 of the 20 tagged individuals provided sufficient data.They stopped on migration at the Yellow River Estuary,Beidagang Reservoir and Xar Moron River,confirming these areas as being important stopover sites for this population.The median spring migration duration was 33.7 days(individuals started migrating between 25 February and 16 March and completed migrating from 1 to 9 April)compared to 52.7 days in autumn(26 September-13 October until 4 November-11 December).The median stopover duration was 31.1 and 51.3 days and the median speed of travel was 62.6 and 47.9 km/day for spring and autumn migration,respectively.The significant differences between spring and autumn migration on the migration duration,the stopover duration and the migration speed confirmed that tagged adult Greylag Geese traveled faster in spring than autumn,supporting the hypothesis that they should be more time-limited during spring migration.展开更多
The present study investigated 15 dead cases of captive wild goslings(Anser anser),which were bred in a small poultry farm in Shandong Province,China.The examined cases presented diverse clinical signs accompanied wit...The present study investigated 15 dead cases of captive wild goslings(Anser anser),which were bred in a small poultry farm in Shandong Province,China.The examined cases presented diverse clinical signs accompanied with neurological manifestations and fatal outcomes.Bacterial culture identified the gram-negative Neisseria sp.from the brain homogenate of most examined cases(10/15,66.7%).The isolated bacteria were identified based on morphologic characteristics,biochemical tests and 16S rDNA typing.Results proved that 1 identical bacterial strain(BNO09-3)was isolated from the positive cases.The phylogeny based on the 16S rDNA gene sequences indicated that this isolate has a close relationship with various strains of genus Neisseria sp.isolated from liver and feces of duck.This is the first report of Neisseria sp.causing fatality in captive wild geese in China.展开更多
基金Our study was supported by the National Key Research and Development Program of China(Grant No.2017YFC0505800)the National Natural Science Foundation of China(Grant No.31870369)+3 种基金the Chinese Academy of Sciences Key Strategic Program,Water Ecological Security Assessment,the Major Research Strategy for Middle and Lower Yangtze River(Grant No.ZDRW-ZS-2017-3-3)International Cooperation and Exchange project NSFC(Grant No.31661143027)the National Natural Science Foundation of China(Grant No.31670424)China Biodiversity Observation Networks(Sino BON).
文摘Twenty Far East Greylag Geese,Anser anser rubrirostris,were captured and fitted with Global Positioning System/Global System for Mobile Communications(GPS/GSM)loggers to identify breeding and wintering areas,migration routes and stopover sites.Telemetry data for the first time showed linkages between their Yangtze River wintering areas,stopover sites in northeastern China,and breeding/molting grounds in eastern Mongolia and northeast China.10 of the 20 tagged individuals provided sufficient data.They stopped on migration at the Yellow River Estuary,Beidagang Reservoir and Xar Moron River,confirming these areas as being important stopover sites for this population.The median spring migration duration was 33.7 days(individuals started migrating between 25 February and 16 March and completed migrating from 1 to 9 April)compared to 52.7 days in autumn(26 September-13 October until 4 November-11 December).The median stopover duration was 31.1 and 51.3 days and the median speed of travel was 62.6 and 47.9 km/day for spring and autumn migration,respectively.The significant differences between spring and autumn migration on the migration duration,the stopover duration and the migration speed confirmed that tagged adult Greylag Geese traveled faster in spring than autumn,supporting the hypothesis that they should be more time-limited during spring migration.
基金supported by the National Science Foundation of China(31101806)the National Science and Technology Ministry(2013BAD12B00)+2 种基金the China Agriculture Research System Poultry-related Science and Technology Innovation Team of Peking(CARS-PSTP)the Knowledge Innovation Program of Chinese Academy of Sciences(KSCX2-EW-J-2)the Major Innovation Program of Science and Technology of Hangzhou City(20131813A07).
文摘The present study investigated 15 dead cases of captive wild goslings(Anser anser),which were bred in a small poultry farm in Shandong Province,China.The examined cases presented diverse clinical signs accompanied with neurological manifestations and fatal outcomes.Bacterial culture identified the gram-negative Neisseria sp.from the brain homogenate of most examined cases(10/15,66.7%).The isolated bacteria were identified based on morphologic characteristics,biochemical tests and 16S rDNA typing.Results proved that 1 identical bacterial strain(BNO09-3)was isolated from the positive cases.The phylogeny based on the 16S rDNA gene sequences indicated that this isolate has a close relationship with various strains of genus Neisseria sp.isolated from liver and feces of duck.This is the first report of Neisseria sp.causing fatality in captive wild geese in China.