We cleanse this new tested feathers which have a good chloroform:methanol dos:step 1 services and dried her or him to possess twenty four hours under an effective fume bonnet
To add the main diet categories of the brand new spoonbill, we made use of the isotopic beliefs regarding possible sufferer and seafood, crustaceans, and you can aquatic insect larvae obtained out of freshwater and you may intertidal habitats when you look at the Southern area Korea reported into the early in the day education (Fig 1A, Desk 2)
Feather products was basically eliminated to eliminate oil otherwise dirt that may impact the worth of the new secure isotope proportion that with both a chloroform:methanol dos:step one solution and you will detergent, because a past studies indicated that clean feathers having a great solvent might not be sufficient to be sure reliability and repeatability regarding isotope studies . Then, the fresh tested feathers was cleared which have detergent (Deconex 16 together with; Borer Chemie, Zuchwil, Switzerland), rinsed 3 http://datingmentor.org/menchats-review times with distilled liquids, and you may dried underneath the fume bonnet . The newest clean trials was in fact cut and you can homogenized with metal scissors. ? 13 C and you can ? 15 Letter analyses was indeed conducted playing with a continuing-flow secure isotope ratio spectrometer (IsoPrime-EA, Micromass, Manchester, UK) linked with an effective CN analyzer (NA Series 2, Le Instruments, Wigan, UK) at the Federal Instrumentation Center having Environmental Administration (NICEM) on Seoul Federal College or university of your Republic off Korea.
Stable isotope ratios were expressed in ?-values and parts per thousand (‰), according to the following equation: where X represents ? 13 C and ? 15 N, R is the corresponding ratio 13 C/ 12 C and 15 N/ 14 N, and Rpractical is the ratio of the international references: Vienna Peedee Belemnite (VPDB) for carbon and air for nitrogen. Leer más